Company lists · Data refreshed September 2026
Top 25 Hydrology consulting firms based in the United States
RevenueBase identified 1,205 company matches for hydrology consulting firms associated with the United States as of September 2026 and tracks 58,620 professional contacts across them, including 29,687 with verified work emails and 25,186 with mobile numbers. Portland is the largest hub.
This list covers company matches for hydrology 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 hydrology consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 13,066 contacts → | ||||
Exact match “Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 2 | 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 | |||||
| 3 | 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 | |||||
| 4 | 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 | |||||
| 5 | 1,577 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 6 | 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 | |||||
| 7 | 1,146 contacts → | ||||
Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 8 | 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 | |||||
| 9 | 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 | |||||
| 10 | 875 contacts → | ||||
Exact match “At Parametrix, we help our clients imagine what's possible.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 11 | 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 | |||||
| 12 | 741 contacts → | ||||
Exact match “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 13 | 725 contacts → | ||||
Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 14 | 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 | |||||
| 15 | 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 | |||||
| 16 | 503 contacts → | ||||
Exact match “BSC Group, Inc.(BSC) is a multidisciplinary consulting firm with a staff of more than 200 professionals and offices in Boston, Worcester, Andover, and West Yarmouth, MA, as well…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 17 | 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 | |||||
| 18 | 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 | |||||
| 19 | 335 contacts → | ||||
Exact match “AE2S is a specialized civil/environmental consulting engineering firm that provides professional services and our unique brand of extreme client service to clients in the upper…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 20 | 333 contacts → | ||||
Exact match “CME Associates, with eight (8) office locations throughout New Jersey, provides a complete range of Environmental, Geotechnical, Engineering, Surveying and Planning services.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 21 | 331 contacts → | ||||
Exact match “LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 22 | 308 contacts → | ||||
Exact match “Ardaman & Associates, Inc.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 23 | 279 contacts → | ||||
Exact match “West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 24 | 267 contacts → | ||||
Exact match “For more than 30 years, WSSI has been the trusted partner in environmental, regulatory, cultural resources, and water resources engineering consulting.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 25 | 259 contacts → | ||||
Exact match “Christopher B.” 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 “hydrology 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 1,205 hydrology consulting firms based in the United States
See the full list, filter by size, metro and specialty, and access 29,687 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Hydrology 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 “hydrology 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 29,687 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.
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 “hydrology consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many hydrology consulting firms are there based in the United States?
RevenueBase identified 1,205 company matches for hydrology 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?
Tetra Tech tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most hydrology consulting firms?
Portland leads with 23 company records, followed by Houston (20) and San Diego (14).
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 29,687 professional contacts with verified work emails tracked across these 1,205 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 1,205 hydrology consulting firms based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Hydrology consulting firms by geography
- Hydrology consulting firms based in France
- Hydrology consulting firms based in Brazil
- Hydrology consulting firms based in Canada
- Hydrology consulting firms based in Australia
- Hydrology consulting firms based in the United Kingdom
- Hydrology consulting firms based in Germany
- Hydrology consulting firms based in Spain
- Hydrology consulting firms based in Italy
- Hydrology consulting firms based in the Netherlands
- Hydrology consulting firms based in South Africa
- Hydrology consulting firms based in Switzerland
- Hydrology consulting firms based in Austria
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
- Hydrology consulting firms based in France
- Hydrology consulting firms based in Brazil
- Hydrology consulting firms based in Canada
- Hydrology consulting firms based in Australia
- Hydrology consulting firms based in the United Kingdom
- Hydrology consulting firms based in Germany
Company intelligence · public preview
Top 25 hydrology 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 1,205 matching company records for hydrology consulting firms based in the United States, with 58,620 tracked contacts and 29,687 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 hydrology 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 |  Tetra Techtetratech.comHQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 13,066 contacts → |
“Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  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. | |||||
| 3 |  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. | |||||
| 4 |  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. | |||||
| 5 |  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. | |||||
| 6 |  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. | |||||
| 7 |  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. | |||||
| 8 |  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. | |||||
| 9 |  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. | |||||
| 10 |  Parametrixparametrix.comHQ: Seattle, CA, United StatesReported employees: 501-1,000 | Seattle, CA, United States | 501-1,000 | Exact match | 875 contacts → |
“At Parametrix, we help our clients imagine what's possible.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  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. | |||||
| 12 |  Psomaspsomas.comHQ: Los Angeles, CA, United StatesReported employees: 501-1,000 | Los Angeles, CA, United States | 501-1,000 | Exact match | 741 contacts → |
“Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Environmental Science Associatesesassoc.comHQ: San Francisco, CA, United StatesReported employees: 501-1,000 | San Francisco, CA, United States | 501-1,000 | Exact match | 725 contacts → |
“ESA is a 100% employee-owned environmental consulting firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  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. | |||||
| 15 |  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. | |||||
| 16 |  BSC Groupbscgroup.comHQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 503 contacts → |
“BSC Group, Inc.(BSC) is a multidisciplinary consulting firm with a staff of more than 200 professionals and offices in Boston, Worcester, Andover, and West Yarmouth, MA, as well…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  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. | |||||
| 18 |  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. | |||||
| 19 | HQ: Grand Forks, ND, United StatesReported employees: 201-500 | Grand Forks, ND, United States | 201-500 | Exact match | 335 contacts → |
“AE2S is a specialized civil/environmental consulting engineering firm that provides professional services and our unique brand of extreme client service to clients in the upper…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  CME Associatescmeusa1.comHQ: Parlin, NJ, United StatesReported employees: 201-500 | Parlin, NJ, United States | 201-500 | Exact match | 333 contacts → |
“CME Associates, with eight (8) office locations throughout New Jersey, provides a complete range of Environmental, Geotechnical, Engineering, Surveying and Planning services.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  LSAlsa.netHQ: Irvine, CA, United StatesReported employees: 201-500 | Irvine, CA, United States | 201-500 | Exact match | 331 contacts → |
“LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Ardaman & Associatesardaman.comHQ: Orlando, FL, United StatesReported employees: 201-500 | Orlando, FL, United States | 201-500 | Exact match | 308 contacts → |
“Ardaman & Associates, Inc.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  West Yostwestyost.comHQ: Davis, OR, United StatesReported employees: 201-500 | Davis, OR, United States | 201-500 | Exact match | 279 contacts → |
“West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: Gainesville, VA, United StatesReported employees: 201-500 | Gainesville, VA, United States | 201-500 | Exact match | 267 contacts → |
“For more than 30 years, WSSI has been the trusted partner in environmental, regulatory, cultural resources, and water resources engineering consulting.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Rosemont, IL, United StatesReported employees: 201-500 | Rosemont, IL, United States | 201-500 | Exact match | 259 contacts → |
“Christopher B.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,205 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Hydrology 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
1,199 records in the displayed employee bands.
6 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 ↗
Questions about this company list
What does Exact match mean for hydrology 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 hydrology consulting firms did RevenueBase find based in the United States?
The saved snapshot records 1,205 matching company records, 58,620 tracked contacts and 29,687 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
Hydrology consulting firms by geography
- Hydrology consulting firms based in France
- Hydrology consulting firms based in Brazil
- Hydrology consulting firms based in Canada
- Hydrology consulting firms based in Australia
- Hydrology consulting firms based in the United Kingdom
- Hydrology consulting firms based in Germany
- Hydrology consulting firms based in Spain
- Hydrology consulting firms based in Italy
- Hydrology consulting firms based in the Netherlands
- Hydrology consulting firms based in South Africa
- Hydrology consulting firms based in Switzerland
- Hydrology consulting firms based in Austria
Cite this list
RevenueBase Data Team. Top 25 hydrology consulting firms based in the United States. Snapshot: September 3, 2026. https://revenuebase.ai/companies/hydrology-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
- Hydrology consulting firms based in France
- Hydrology consulting firms based in Brazil
- Hydrology consulting firms based in Canada
- Hydrology consulting firms based in Australia
- Hydrology consulting firms based in the United Kingdom
- Hydrology consulting firms based in Germany
Company intelligence · public preview
Top 25 hydrology consulting firms based in the United States
RevenueBase records 1,205 matching company records for hydrology consulting firms based in the United States, with 58,620 tracked contacts and 29,687 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 hydrology 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 | Tetra Techtetratech.com HQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 13,066 contacts → |
“Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | 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. | |||||
| 3 | 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. | |||||
| 4 | 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. | |||||
| 5 | 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. | |||||
| 6 | 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. | |||||
| 7 | 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. | |||||
| 8 | 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. | |||||
| 9 | 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. | |||||
| 10 | Parametrixparametrix.com HQ: Seattle, CA, United StatesReported employees: 501-1,000 | Seattle, CA, United States | 501-1,000 | Exact match | 875 contacts → |
“At Parametrix, we help our clients imagine what's possible.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | 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. | |||||
| 12 | Psomaspsomas.com HQ: Los Angeles, CA, United StatesReported employees: 501-1,000 | Los Angeles, CA, United States | 501-1,000 | Exact match | 741 contacts → |
“Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Environmental Science Associatesesassoc.com HQ: San Francisco, CA, United StatesReported employees: 501-1,000 | San Francisco, CA, United States | 501-1,000 | Exact match | 725 contacts → |
“ESA is a 100% employee-owned environmental consulting firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | 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. | |||||
| 15 | 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. | |||||
| 16 | BSC Groupbscgroup.com HQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 503 contacts → |
“BSC Group, Inc.(BSC) is a multidisciplinary consulting firm with a staff of more than 200 professionals and offices in Boston, Worcester, Andover, and West Yarmouth, MA, as well…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | 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. | |||||
| 18 | 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. | |||||
| 19 | HQ: Grand Forks, ND, United StatesReported employees: 201-500 | Grand Forks, ND, United States | 201-500 | Exact match | 335 contacts → |
“AE2S is a specialized civil/environmental consulting engineering firm that provides professional services and our unique brand of extreme client service to clients in the upper…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | CME Associatescmeusa1.com HQ: Parlin, NJ, United StatesReported employees: 201-500 | Parlin, NJ, United States | 201-500 | Exact match | 333 contacts → |
“CME Associates, with eight (8) office locations throughout New Jersey, provides a complete range of Environmental, Geotechnical, Engineering, Surveying and Planning services.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | LSAlsa.net HQ: Irvine, CA, United StatesReported employees: 201-500 | Irvine, CA, United States | 201-500 | Exact match | 331 contacts → |
“LSA is a diversified environmental, transportation, and community planning firm that evolved from a small consulting firm.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Ardaman & Associatesardaman.com HQ: Orlando, FL, United StatesReported employees: 201-500 | Orlando, FL, United States | 201-500 | Exact match | 308 contacts → |
“Ardaman & Associates, Inc.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | West Yostwestyost.com HQ: Davis, OR, United StatesReported employees: 201-500 | Davis, OR, United States | 201-500 | Exact match | 279 contacts → |
“West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: Gainesville, VA, United StatesReported employees: 201-500 | Gainesville, VA, United States | 201-500 | Exact match | 267 contacts → |
“For more than 30 years, WSSI has been the trusted partner in environmental, regulatory, cultural resources, and water resources engineering consulting.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Rosemont, IL, United StatesReported employees: 201-500 | Rosemont, IL, United States | 201-500 | Exact match | 259 contacts → |
“Christopher B.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,205 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Hydrology 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
1,199 records in the displayed employee bands.
6 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 ↗
Questions about this company list
What does Exact match mean for hydrology 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 hydrology consulting firms did RevenueBase find based in the United States?
The saved snapshot records 1,205 matching company records, 58,620 tracked contacts and 29,687 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
Hydrology consulting firms by geography
- Hydrology consulting firms based in France
- Hydrology consulting firms based in Brazil
- Hydrology consulting firms based in Canada
- Hydrology consulting firms based in Australia
- Hydrology consulting firms based in the United Kingdom
- Hydrology consulting firms based in Germany
- Hydrology consulting firms based in Spain
- Hydrology consulting firms based in Italy
- Hydrology consulting firms based in the Netherlands
- Hydrology consulting firms based in South Africa
- Hydrology consulting firms based in Switzerland
- Hydrology consulting firms based in Austria
Cite this list
RevenueBase Data Team. Top 25 hydrology consulting firms based in the United States. Snapshot: September 3, 2026. https://revenuebase.ai/companies/hydrology-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
- Hydrology consulting firms based in France
- Hydrology consulting firms based in Brazil
- Hydrology consulting firms based in Canada
- Hydrology consulting firms based in Australia
- Hydrology consulting firms based in the United Kingdom
- Hydrology consulting firms based in Germany