Company lists · Data refreshed September 2026

Top 25 Water reuse consulting firms based in the United States

RevenueBase identified 1,072 company matches for water reuse consulting firms associated with the United States as of September 2026 and tracks 37,822 professional contacts across them, including 16,107 with verified work emails. Houston is the largest hub.

This list covers company matches for water reuse 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 29, 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 Sep 29, 2026 How this list was built
1,072Companies
37,822Contacts tracked
16,107Verified emails
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The 25 largest water reuse consulting firms based in the United States

Ranked by team size
Top 25 of 1,072 company matches for water reuse consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 Sep 29, 202610001+12,999 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 · Sep 29, 2026 · View company records in RevenueBase
2Exact matchWashington, DC, United StatesHQ recorded Sep 29, 202610001+2,639 contacts →

Exact match

“Evoqua has now joined Xylem.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 29, 20261,001-5,0002,473 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 29, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Sep 29, 20261,001-5,0002,100 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 29, 2026 · View company records in RevenueBase
5Exact matchWalnut Creek, CA, United StatesHQ recorded Sep 29, 20261,001-5,0001,718 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 · Sep 29, 2026 · View company records in RevenueBase
6Exact matchCanonsburg, PA, United StatesHQ recorded Sep 29, 2026501-1,000903 contacts →

Exact match

“Aquatech enables the world's most recognized companies to solve complex challenges in water reuse, desalination, minimal and zero liquid discharge, and critical minerals…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchWoburn, MA, United StatesHQ recorded Sep 29, 20261,001-5,000813 contacts →

Exact match

“Gradiant is a Different Kind of Water Company.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8Exact matchSeattle, WA, United StatesHQ recorded Sep 29, 2026501-1,000479 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 29, 2026 · View company records in RevenueBase
9Exact matchFort Lauderdale, FL, United StatesHQ recorded Sep 29, 202651-200317 contacts →

Exact match

“Parkson Corporation is a supplier of innovative, cost effective solutions for potable water, process water, and industrial and municipal wastewater treatment.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10Exact matchMarlborough, MA, United StatesHQ recorded Sep 29, 202651-200315 contacts →

Exact match

“Tata & Howard is a 100% employee owned, award-winning, specialized consulting engineering firm dedicated to providing superior client service coupled with delivering…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11Exact matchDavis, CA, United StatesHQ recorded Sep 29, 2026201-500279 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 29, 2026 · View company records in RevenueBase
12Exact matchMonroe, OH, United StatesHQ recorded Sep 29, 2026201-500254 contacts →

Exact match

“Valicor is a trusted partner for sustainable waste management solutions.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchIrving, TX, United StatesHQ recorded Sep 29, 20261,001-5,000251 contacts →

Exact match

“Chemsearch FE’s mission is simple-to help facilities save water, energy and reduce operating costs.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Sep 29, 2026201-500205 contacts →

Exact match

“Stage 3 Separation is North America’s leading service provider for fluid conservation, solids control and waste mitigation.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchMinneapolis, MN, United StatesHQ recorded Sep 29, 2026201-500195 contacts →

Exact match

“Formed in 2017 following the consolidation of independent water treatment solution providers Emefcy and RWL Water, Fluence Corporation was established with the vision of becoming…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchSeattle, WA, United StatesHQ recorded Sep 29, 202651-200176 contacts →

Exact match

“Herrera Environmental Consultants is a leading engineering and scientific consulting firm focused on restoration, water, and sustainable development.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17Exact matchTucson, AZ, United StatesHQ recorded Sep 29, 2026201-500165 contacts →

Exact match

“WestLand Engineering & Environmental Services, has been a leading engineering and environmental services firm since 1997.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18Exact matchWest Palm Beach, FL, United StatesHQ recorded Sep 29, 2026501-1,000151 contacts →

Exact match

“The third largest water utility department in the State of Florida, the Palm Beach County Water Utilities Department (PBCWUD) provides drinking water, wastewater collection and…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchTempe, AZ, United StatesHQ recorded Sep 29, 2026201-500144 contacts →

Exact match

“Wilson Engineers has 40 years of specialized expertise and has over 225 professionals in Arizona and Nevada.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchSt Michael, MN, United StatesHQ recorded Sep 29, 2026201-500143 contacts →

Exact match

“Apex, a trusted leader in water and process management, delivers integrated solutions that empower agricultural, commercial, and industrial customers across the U.S.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21Exact matchBothell, WA, United StatesHQ recorded Sep 29, 202651-200136 contacts →

Exact match

“RH2 is an innovative, full-service engineering firm specializing in water and wastewater related projects.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchMorrisville, NC, United StatesHQ recorded Sep 29, 2026501-1,000136 contacts →

Exact match

“AQUALIS is the national leader in water management, compliance and engineering, helping businesses meet complex water regulations while protecting long-term infrastructure.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact matchScottsdale, AZ, United StatesHQ recorded Sep 29, 202651-200135 contacts →

Exact match

“Water Works Engineers is a leading civil and environmental engineering firm specializing in innovative and sustainable solutions for water infrastructure projects across the…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchTampa, FL, United StatesHQ recorded Sep 29, 202651-200130 contacts →

Exact match

“Our priority is to provide safe, reliable, and cost-effective water and wastewater treatment solutions through our Water-as-a-Service® approach.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25Exact matchGreenwood Village, CO, United StatesHQ recorded Sep 29, 202651-200126 contacts →

Exact match

“CMS Environmental Solutions is a stormwater compliance consultant providing NOI permitting, development, dewatering planning, site inspections, and custom stormwater management…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 1,072 water reuse consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 16,107 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water reuse consulting firms based in the United States at a glance

As of Sep 29, 2026
42.6%Verified-email coverage
35.3Average contacts per company
1-10Median size (employees)
2.7%Largest-city concentration · Houston
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
572
11-50
344
51-200
113
201-500
19
501-1,000
5
1,001-5,000
9
5,001-10,000
2
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 1,072 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 “water reuse 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 16,107 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 29, 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.

Water reuse 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 “water reuse consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water reuse consulting firms are there based in the United States?

RevenueBase identified 1,072 company matches for water reuse 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 water reuse consulting firms?

Houston leads with 29 company records, followed by Austin (13) and Los Angeles (13).

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 16,107 professional contacts with verified work emails tracked across these 1,072 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 29, 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.