Company lists · Data refreshed November 2026

Top 25 Wastewater system engineers based in the United States

RevenueBase identified 1,295 company matches for wastewater system engineers associated with the United States as of November 2026 and tracks 73,757 professional contacts across them, including 31,335 with verified work emails. Houston is the largest hub.

This list covers company matches for wastewater system engineers 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 November 6, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
1,295Companies
73,757Contacts tracked
31,335Verified emails
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The 25 largest wastewater system engineers based in the United States

Ranked by team size
Top 25 of 1,295 company matches for wastewater system engineers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPasadena, CA, United StatesHQ recorded Nov 6, 202610001+14,232 contacts →

Exact match

“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchBoston, MA, United StatesHQ recorded Nov 6, 20265,001-10,0008,143 contacts →

Exact match

“CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchWalnut Creek, CA, United StatesHQ recorded Nov 6, 20261,001-5,0002,553 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchNew York, CO, United StatesHQ recorded Nov 6, 20261,001-5,0002,306 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 · Nov 6, 2026 · View company records in RevenueBase
5Exact matchWalnut Creek, NV, United StatesHQ recorded Nov 6, 20261,001-5,0001,837 contacts →

Exact match

“For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchAlbany, NH, United StatesHQ recorded Nov 6, 20261,001-5,0001,780 contacts →

Exact match

“CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchFort Worth, TX, United StatesHQ recorded Nov 6, 20261,001-5,0001,588 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 · Nov 6, 2026 · View company records in RevenueBase
8Exact matchWest Chester, PA, United StatesHQ recorded Nov 6, 20261,001-5,0001,559 contacts →

Exact match

“Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchFargo, IA, United StatesHQ recorded Nov 6, 20261,001-5,0001,491 contacts →

Exact match

“Ulteig delivers comprehensive design engineering, program management and technical and field services that strengthen infrastructure vital to everyday life.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHorsham, PA, United StatesHQ recorded Nov 6, 20261,001-5,0001,107 contacts →

Exact match

“As an Azuria owned company, Inframark is a widely recognized leader in Water Infrastructure Operations and Infrastructure Management Services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchPortland, ME, United StatesHQ recorded Nov 6, 20261,001-5,0001,098 contacts →

Exact match

“Woodard & Curran is more than just a consulting firm – we are an employee-owned integrated science, engineering, design-build, and operations company specializing in water and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchIselin, NJ, United StatesHQ recorded Nov 6, 20261,001-5,000800 contacts →

Exact match

“This page is now closed.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchJackson, MS, United StatesHQ recorded Nov 6, 2026501-1,000637 contacts →

Exact match

“Neel-Schaffer is a multi-disciplined engineering, planning and construction management firm that was founded in 1983 and today is one of the largest private, employee-owned…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSan Francisco, CA, United StatesHQ recorded Nov 6, 2026201-500593 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 · Nov 6, 2026 · View company records in RevenueBase
15Exact matchNorth Kansas City, MO, United StatesHQ recorded Nov 6, 20261,001-5,000591 contacts →

Exact match

“Garney Construction is a national leader in water and wastewater construction.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchMiddletown, NJ, United StatesHQ recorded Nov 6, 2026201-500540 contacts →

Exact match

“T&M Associates is a leading engineering and technical services firm focused on innovative solutions that advance our clients’ goals and sustain communities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchMiddletown, VA, United StatesHQ recorded Nov 6, 2026201-500504 contacts →

Exact match

“Founded in 1991, AI Engineers provides comprehensive Bridge, Transportation, Construction Support, Water/Wastewater, Site/Civil, Building Systems, Design-Build, Survey/Mapping…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBroomfield, CO, United StatesHQ recorded Nov 6, 2026501-1,000462 contacts →

Exact match

“As a leading U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSanford, GA, United StatesHQ recorded Nov 6, 2026201-500427 contacts →

Exact match

“CPH is a full-service architecture and engineering firm providing design and construction administration services to public and private clients for over 40 years throughout the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchCrystal Lake, TX, United StatesHQ recorded Nov 6, 2026201-500422 contacts →

Exact match

“Founded in 1946, Baxter & Woodman, Inc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchTopsham, ME, United StatesHQ recorded Nov 6, 2026201-500421 contacts →

Exact match

“Wright-Pierce is an award-winning, multidiscipline engineering firm that has been providing drinking water, wastewater, and civil infrastructure services since 1947.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchHarrisburg, PA, United StatesHQ recorded Nov 6, 2026201-500399 contacts →

Exact match

“HRG assists with the planning, design, and management of community infrastructure.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLiverpool, NY, United StatesHQ recorded Nov 6, 2026201-500385 contacts →

Exact match

“Barton & Loguidice is a multidisciplinary consulting firm providing technical services to public and private clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchGrand Forks, ND, United StatesHQ recorded Nov 6, 2026201-500358 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 · Nov 6, 2026 · View company records in RevenueBase
25Exact matchNorthville, TX, United StatesHQ recorded Nov 6, 2026201-500334 contacts →

Exact match

“BB & E, Inc.(BB & E) is an employee-owned firm specializing in civil, energy, and environmental engineering.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 1,295 wastewater system engineers based in the United States

See the full list, filter by size, metro and specialty, and access 31,335 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Wastewater system engineers based in the United States at a glance

As of Nov 6, 2026
42.5%Verified-email coverage
57.0Average contacts per company
11-50Median size (employees)
2.9%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
467
11-50
493
51-200
230
201-500
61
501-1,000
13
1,001-5,000
21
5,001-10,000
4
10001+
3

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,295 companies.

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 “wastewater system engineers” 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 31,335 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 November 6, 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.

Wastewater system engineers 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 “wastewater system engineers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many wastewater system engineers are there based in the United States?

RevenueBase identified 1,295 company matches for wastewater system engineers associated with the United States as of November 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 wastewater system engineers?

Houston leads with 37 company records, followed by Austin (20) and Tampa (12).

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 31,335 professional contacts with verified work emails tracked across these 1,295 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 November 6, 2026.

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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.