Company lists · Data refreshed September 2026
Top 25 Hydrogeological consulting firms based in the United States
RevenueBase identified 2,065 company matches for hydrogeological consulting firms associated with the United States as of September 2026 and tracks 86,659 professional contacts across them, including 40,836 with verified work emails and 35,764 with mobile numbers. Houston is the largest hub.
This list covers company matches for hydrogeological consulting firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 3, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest hydrogeological consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,024 contacts → | ||||
Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 2 | 3,183 contacts → | ||||
Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 3 | 2,455 contacts → | ||||
Exact match “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 4 | 2,392 contacts → | ||||
Exact match “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 5 | 2,201 contacts → | ||||
Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 6 | 2,152 contacts → | ||||
Exact match “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 7 | 2,105 contacts → | ||||
Exact match “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 8 | 1,577 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 9 | 1,461 contacts → | ||||
Exact match “Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 10 | 1,146 contacts → | ||||
Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 11 | 1,127 contacts → | ||||
Exact match “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 12 | 1,098 contacts → | ||||
Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 13 | 949 contacts → | ||||
Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 14 | 872 contacts → | ||||
Exact match “Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 15 | 868 contacts → | ||||
Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 16 | 792 contacts → | ||||
Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 17 | 696 contacts → | ||||
Exact match “Schnabel is a trusted partner in building the foundation for project success.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 18 | 581 contacts → | ||||
Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 19 | 575 contacts → | ||||
Exact match “For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 20 | 571 contacts → | ||||
Exact match “Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 21 | 510 contacts → | ||||
Exact match “Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 22 | 483 contacts → | ||||
Exact match “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 23 | 479 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 24 | 478 contacts → | ||||
Exact match “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 25 | 457 contacts → | ||||
Exact match “Geo-Technology Associates, Inc.(GTA) proudly celebrates more than 40 years of service, backed by a team of 600+ professionals-including geotechnical engineers, environmental…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “hydrogeological consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 2,065 hydrogeological consulting firms based in the United States
See the full list, filter by size, metro and specialty, and access 40,836 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Hydrogeological consulting firms based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “hydrogeological consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 40,836 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Hydrogeological consulting firms by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “hydrogeological consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many hydrogeological consulting firms are there based in the United States?
RevenueBase identified 2,065 company matches for hydrogeological consulting firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Terracon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most hydrogeological consulting firms?
Houston leads with 69 company records, followed by Denver (28) and Portland (25).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 40,836 professional contacts with verified work emails tracked across these 2,065 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.
Ready to reach these companies? Verified emails and direct dials for all 2,065 hydrogeological consulting firms based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Hydrogeological consulting firms by geography
- Hydrogeological consulting firms based in Brazil
- Hydrogeological consulting firms based in Canada
- Hydrogeological consulting firms based in Australia
- Hydrogeological consulting firms based in France
- Hydrogeological consulting firms based in Germany
- Hydrogeological consulting firms based in the United Kingdom
- Hydrogeological consulting firms based in Italy
- Hydrogeological consulting firms based in Spain
- Hydrogeological consulting firms based in South Africa
- Hydrogeological consulting firms based in the Netherlands
- Hydrogeological consulting firms based in Switzerland
- Hydrogeological consulting firms based in Mexico
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Hydrogeological consulting firms based in Brazil
- Hydrogeological consulting firms based in Canada
- Hydrogeological consulting firms based in Australia
- Hydrogeological consulting firms based in France
- Hydrogeological consulting firms based in Germany
- Hydrogeological consulting firms based in the United Kingdom
Company intelligence · public preview
Top 25 hydrogeological consulting firms based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 2,065 matching company records for hydrogeological consulting firms based in the United States, with 86,659 tracked contacts and 40,836 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 3, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 hydrogeological consulting firms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Terraconterracon.comHQ: Olathe, CA, United StatesReported employees: 5,001-10,000 | Olathe, CA, United States | 5,001-10,000 | Exact match | 6,024 contacts → |
“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Goldergolder.comHQ: HQ not recorded; location: Houston, TX, United StatesReported employees: 5,001-10,000 | HQ not recorded; location: Houston, TX, United States | 5,001-10,000 | Exact match | 3,183 contacts → |
“Golder was acquired by WSP.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Brown And Caldwellbrownandcaldwell.comHQ: Walnut Creek, CA, United StatesReported employees: 1,001-5,000 | Walnut Creek, CA, United States | 1,001-5,000 | Exact match | 2,455 contacts → |
“Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Geosyntec Consultantsgeosyntec.comHQ: Boca Raton, FL, United StatesReported employees: 1,001-5,000 | Boca Raton, FL, United States | 1,001-5,000 | Exact match | 2,392 contacts → |
“Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  ECS Group Of Companiesecslimited.comHQ: Chantilly, VA, United StatesReported employees: 1,001-5,000 | Chantilly, VA, United States | 1,001-5,000 | Exact match | 2,201 contacts → |
“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Civil & Environmental Consultants, INCcecinc.comHQ: Moon Township, WV, United StatesReported employees: 1,001-5,000 | Moon Township, WV, United States | 1,001-5,000 | Exact match | 2,152 contacts → |
“Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Hazen And Sawyerhazenandsawyer.comHQ: New York, NC, United StatesReported employees: 1,001-5,000 | New York, NC, United States | 1,001-5,000 | Exact match | 2,105 contacts → |
“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  GEI Consultants, INCgeiconsultants.comHQ: Woburn, MA, United StatesReported employees: 1,001-5,000 | Woburn, MA, United States | 1,001-5,000 | Exact match | 1,577 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 9 |  Freese And Nicholsfreese.comHQ: Fort Worth, NC, United StatesReported employees: 1,001-5,000 | Fort Worth, NC, United States | 1,001-5,000 | Exact match | 1,461 contacts → |
“Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Apex Companiesapexcos.comHQ: Rockville, MD, United StatesReported employees: 1,001-5,000 | Rockville, MD, United States | 1,001-5,000 | Exact match | 1,146 contacts → |
“Who is Apex?” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Verdantasverdantas.comHQ: Tampa, OH, United StatesReported employees: 1,001-5,000 | Tampa, OH, United States | 1,001-5,000 | Exact match | 1,127 contacts → |
“At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Barr Engineering CObarr.comHQ: Minneapolis, United StatesReported employees: 1,001-5,000 | Minneapolis, United States | 1,001-5,000 | Exact match | 1,098 contacts → |
“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Trinity Consultantstrinityconsultants.comHQ: Dallas, TX, United StatesReported employees: 1,001-5,000 | Dallas, TX, United States | 1,001-5,000 | Exact match | 949 contacts → |
“Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  GZA Geoenvironmental, INCgza.comHQ: Norwood, MA, United StatesReported employees: 501-1,000 | Norwood, MA, United States | 501-1,000 | Exact match | 872 contacts → |
“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  ATC Group Services LLConeatlas.comHQ: Lafayette, OH, United StatesReported employees: 1,001-5,000 | Lafayette, OH, United States | 1,001-5,000 | Exact match | 868 contacts → |
“ATC Group Services LLC is now Atlas.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  DUDEKdudek.comHQ: Encinitas, CA, United StatesReported employees: 501-1,000 | Encinitas, CA, United States | 501-1,000 | Exact match | 792 contacts → |
“Dudek is an environmental, planning, and engineering consulting firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Schnabel Engineeringschnabel-eng.comHQ: Glen Allen, VA, United StatesReported employees: 501-1,000 | Glen Allen, VA, United States | 501-1,000 | Exact match | 696 contacts → |
“Schnabel is a trusted partner in building the foundation for project success.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Raba Kistner, INCrkci.comHQ: San Antonio, UT, United StatesReported employees: 501-1,000 | San Antonio, UT, United States | 501-1,000 | Exact match | 581 contacts → |
“Founded in 1968, Raba Kistner Inc.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Kennedy Jenkskennedyjenks.comHQ: San Francisco, OR, United StatesReported employees: 201-500 | San Francisco, OR, United States | 201-500 | Exact match | 575 contacts → |
“For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Trihydro Corporationtrihydro.comHQ: Laramie, WY, United StatesReported employees: 501-1,000 | Laramie, WY, United States | 501-1,000 | Exact match | 571 contacts → |
“Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Nova Engineering And Environmental, LLCusanova.comHQ: Kennesaw, FL, United StatesReported employees: 501-1,000 | Kennesaw, FL, United States | 501-1,000 | Exact match | 510 contacts → |
“Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Rincon Consultantsrinconconsultants.comHQ: Ventura, CA, United StatesReported employees: 501-1,000 | Ventura, CA, United States | 501-1,000 | Exact match | 483 contacts → |
“Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Geoengineers INCgeoengineers.comHQ: Redmond, WA, United StatesReported employees: 201-500 | Redmond, WA, United States | 201-500 | Exact match | 479 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 |  Anchor QEAanchorqea.comHQ: Seattle, MD, United StatesReported employees: 501-1,000 | Seattle, MD, United States | 501-1,000 | Exact match | 478 contacts → |
“Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Geo-Technology Associates, Inc. GTAgtaeng.comHQ: Abingdon, MD, United StatesReported employees: 501-1,000 | Abingdon, MD, United States | 501-1,000 | Exact match | 457 contacts → |
“Geo-Technology Associates, Inc.(GTA) proudly celebrates more than 40 years of service, backed by a team of 600+ professionals-including geotechnical engineers, environmental…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 2,065 company matches
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Hydrogeological consulting firms: dataset insights
September 3, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
2,057 records in the displayed employee bands.
8 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 3, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Hydrogeological consulting firms by metro
Questions about this company list
What does Exact match mean for hydrogeological consulting firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many hydrogeological consulting firms did RevenueBase find based in the United States?
The saved snapshot records 2,065 matching company records, 86,659 tracked contacts and 40,836 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 3, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Hydrogeological consulting firms by geography
- Hydrogeological consulting firms based in Brazil
- Hydrogeological consulting firms based in Canada
- Hydrogeological consulting firms based in Australia
- Hydrogeological consulting firms based in France
- Hydrogeological consulting firms based in Germany
- Hydrogeological consulting firms based in the United Kingdom
- Hydrogeological consulting firms based in Italy
- Hydrogeological consulting firms based in Spain
- Hydrogeological consulting firms based in South Africa
- Hydrogeological consulting firms based in the Netherlands
- Hydrogeological consulting firms based in Switzerland
- Hydrogeological consulting firms based in Mexico
Cite this list
RevenueBase Data Team. Top 25 hydrogeological consulting firms based in the United States. Snapshot: September 3, 2026. https://revenuebase.ai/companies/hydrogeological-consulting-firms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Hydrogeological consulting firms based in Brazil
- Hydrogeological consulting firms based in Canada
- Hydrogeological consulting firms based in Australia
- Hydrogeological consulting firms based in France
- Hydrogeological consulting firms based in Germany
- Hydrogeological consulting firms based in the United Kingdom
Company intelligence · public preview
Top 25 hydrogeological consulting firms based in the United States
RevenueBase records 2,065 matching company records for hydrogeological consulting firms based in the United States, with 86,659 tracked contacts and 40,836 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 3, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 hydrogeological consulting firms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Terraconterracon.com HQ: Olathe, CA, United StatesReported employees: 5,001-10,000 | Olathe, CA, United States | 5,001-10,000 | Exact match | 6,024 contacts → |
“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Goldergolder.com HQ: HQ not recorded; location: Houston, TX, United StatesReported employees: 5,001-10,000 | HQ not recorded; location: Houston, TX, United States | 5,001-10,000 | Exact match | 3,183 contacts → |
“Golder was acquired by WSP.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Brown And Caldwellbrownandcaldwell.com HQ: Walnut Creek, CA, United StatesReported employees: 1,001-5,000 | Walnut Creek, CA, United States | 1,001-5,000 | Exact match | 2,455 contacts → |
“Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Geosyntec Consultantsgeosyntec.com HQ: Boca Raton, FL, United StatesReported employees: 1,001-5,000 | Boca Raton, FL, United States | 1,001-5,000 | Exact match | 2,392 contacts → |
“Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | ECS Group Of Companiesecslimited.com HQ: Chantilly, VA, United StatesReported employees: 1,001-5,000 | Chantilly, VA, United States | 1,001-5,000 | Exact match | 2,201 contacts → |
“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Civil & Environmental Consultants, INCcecinc.com HQ: Moon Township, WV, United StatesReported employees: 1,001-5,000 | Moon Township, WV, United States | 1,001-5,000 | Exact match | 2,152 contacts → |
“Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Hazen And Sawyerhazenandsawyer.com HQ: New York, NC, United StatesReported employees: 1,001-5,000 | New York, NC, United States | 1,001-5,000 | Exact match | 2,105 contacts → |
“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | GEI Consultants, INCgeiconsultants.com HQ: Woburn, MA, United StatesReported employees: 1,001-5,000 | Woburn, MA, United States | 1,001-5,000 | Exact match | 1,577 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 9 | Freese And Nicholsfreese.com HQ: Fort Worth, NC, United StatesReported employees: 1,001-5,000 | Fort Worth, NC, United States | 1,001-5,000 | Exact match | 1,461 contacts → |
“Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Apex Companiesapexcos.com HQ: Rockville, MD, United StatesReported employees: 1,001-5,000 | Rockville, MD, United States | 1,001-5,000 | Exact match | 1,146 contacts → |
“Who is Apex?” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Verdantasverdantas.com HQ: Tampa, OH, United StatesReported employees: 1,001-5,000 | Tampa, OH, United States | 1,001-5,000 | Exact match | 1,127 contacts → |
“At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Barr Engineering CObarr.com HQ: Minneapolis, United StatesReported employees: 1,001-5,000 | Minneapolis, United States | 1,001-5,000 | Exact match | 1,098 contacts → |
“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Trinity Consultantstrinityconsultants.com HQ: Dallas, TX, United StatesReported employees: 1,001-5,000 | Dallas, TX, United States | 1,001-5,000 | Exact match | 949 contacts → |
“Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | GZA Geoenvironmental, INCgza.com HQ: Norwood, MA, United StatesReported employees: 501-1,000 | Norwood, MA, United States | 501-1,000 | Exact match | 872 contacts → |
“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | ATC Group Services LLConeatlas.com HQ: Lafayette, OH, United StatesReported employees: 1,001-5,000 | Lafayette, OH, United States | 1,001-5,000 | Exact match | 868 contacts → |
“ATC Group Services LLC is now Atlas.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | DUDEKdudek.com HQ: Encinitas, CA, United StatesReported employees: 501-1,000 | Encinitas, CA, United States | 501-1,000 | Exact match | 792 contacts → |
“Dudek is an environmental, planning, and engineering consulting firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Schnabel Engineeringschnabel-eng.com HQ: Glen Allen, VA, United StatesReported employees: 501-1,000 | Glen Allen, VA, United States | 501-1,000 | Exact match | 696 contacts → |
“Schnabel is a trusted partner in building the foundation for project success.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Raba Kistner, INCrkci.com HQ: San Antonio, UT, United StatesReported employees: 501-1,000 | San Antonio, UT, United States | 501-1,000 | Exact match | 581 contacts → |
“Founded in 1968, Raba Kistner Inc.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Kennedy Jenkskennedyjenks.com HQ: San Francisco, OR, United StatesReported employees: 201-500 | San Francisco, OR, United States | 201-500 | Exact match | 575 contacts → |
“For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Trihydro Corporationtrihydro.com HQ: Laramie, WY, United StatesReported employees: 501-1,000 | Laramie, WY, United States | 501-1,000 | Exact match | 571 contacts → |
“Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Nova Engineering And Environmental, LLCusanova.com HQ: Kennesaw, FL, United StatesReported employees: 501-1,000 | Kennesaw, FL, United States | 501-1,000 | Exact match | 510 contacts → |
“Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Rincon Consultantsrinconconsultants.com HQ: Ventura, CA, United StatesReported employees: 501-1,000 | Ventura, CA, United States | 501-1,000 | Exact match | 483 contacts → |
“Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Geoengineers INCgeoengineers.com HQ: Redmond, WA, United StatesReported employees: 201-500 | Redmond, WA, United States | 201-500 | Exact match | 479 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 | Anchor QEAanchorqea.com HQ: Seattle, MD, United StatesReported employees: 501-1,000 | Seattle, MD, United States | 501-1,000 | Exact match | 478 contacts → |
“Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Geo-Technology Associates, Inc. GTAgtaeng.com HQ: Abingdon, MD, United StatesReported employees: 501-1,000 | Abingdon, MD, United States | 501-1,000 | Exact match | 457 contacts → |
“Geo-Technology Associates, Inc.(GTA) proudly celebrates more than 40 years of service, backed by a team of 600+ professionals-including geotechnical engineers, environmental…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Hydrogeological consulting firms: dataset insights
September 3, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
2,057 records in the displayed employee bands.
8 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 3, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Hydrogeological consulting firms by metro
Questions about this company list
What does Exact match mean for hydrogeological consulting firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many hydrogeological consulting firms did RevenueBase find based in the United States?
The saved snapshot records 2,065 matching company records, 86,659 tracked contacts and 40,836 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 3, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Hydrogeological consulting firms by geography
- Hydrogeological consulting firms based in Brazil
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- Hydrogeological consulting firms based in Australia
- Hydrogeological consulting firms based in France
- Hydrogeological consulting firms based in Germany
- Hydrogeological consulting firms based in the United Kingdom
- Hydrogeological consulting firms based in Italy
- Hydrogeological consulting firms based in Spain
- Hydrogeological consulting firms based in South Africa
- Hydrogeological consulting firms based in the Netherlands
- Hydrogeological consulting firms based in Switzerland
- Hydrogeological consulting firms based in Mexico
Cite this list
RevenueBase Data Team. Top 25 hydrogeological consulting firms based in the United States. Snapshot: September 3, 2026. https://revenuebase.ai/companies/hydrogeological-consulting-firms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Hydrogeological consulting firms based in Brazil
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- Hydrogeological consulting firms based in Australia
- Hydrogeological consulting firms based in France
- Hydrogeological consulting firms based in Germany
- Hydrogeological consulting firms based in the United Kingdom