Company lists · Data refreshed September 2026

Top 25 Stormwater treatment companies based in the United States

Name: Stormwater treatment companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 837 companies tracked

RevenueBase identified 837 stormwater treatment companies headquartered in the United States as of September 2026 and tracks 11,489 professional contacts across them, including 4,456 with verified work emails. Houston is the largest hub.

This list covers stormwater treatment companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review

837Companies

11,489Contacts tracked

4,456Verified emails

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The 25 largest stormwater treatment companies based in the United States

Ranked by team size

Top 25 of 837 stormwater treatment companies based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to stormwater treatment companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Gradiant	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 22, 2026	1,001-5,000	813 contacts →
	Indirect evidence “Gradiant is a Different Kind of Water Company.” Source: RevenueBase Database · checked Sep 22, 2026
2	Westech Engineering	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 22, 2026	501-1,000	554 contacts →
	Partial evidence “WesTech Engineering, LLC designs, engineers, and manufactures water and wastewater treatment process equipment for mineral, industrial, and municipal applications worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
3	Parkson Corporation	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 22, 2026	51-200	317 contacts →
	Partial evidence “Parkson Corporation is a supplier of innovative, cost effective solutions for potable water, process water, and industrial and municipal wastewater treatment.” Source: RevenueBase Database · checked Sep 22, 2026
4	Infiltrator Water Technologies Decentralized Wastewater Treatment Solutions	Partial evidence	Old Saybrook, CT, United StatesHQ checked Sep 22, 2026	501-1,000	295 contacts →
	Partial evidence “Protecting the environment with innovative wastewater treatment solutions for over 35 years, Infiltrator is the leading manufacturer of onsite wastewater treatment products in…” Source: RevenueBase Database · checked Sep 22, 2026
5	Aqua-Aerobic Systems, INC	Indirect evidence	Loves Park, IL, United StatesHQ checked Sep 22, 2026	51-200	207 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
6	Fluence Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 22, 2026	201-500	195 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
7	Newterra	Partial evidence	Coraopolis, PA, United StatesHQ checked Sep 22, 2026	201-500	185 contacts →
	Partial evidence “Newterra designs, engineers, manufactures, and services environmental, water and wastewater treatment solutions that assure great performance, superb reliability, and the highest…” Source: RevenueBase Database · checked Sep 22, 2026
8	Orenco Systems, INC	Indirect evidence	Sutherlin, OR, United StatesHQ checked Sep 22, 2026	201-500	170 contacts →
	Indirect evidence “Nobody wants to worry about whether their wastewater is contaminating nearby rivers, streams, and wells.” Source: RevenueBase Database · checked Sep 22, 2026
9	Aqualis	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 22, 2026	501-1,000	136 contacts →
	Indirect evidence “AQUALIS is the national leader in water management, compliance and engineering, helping businesses meet complex water regulations while protecting long-term infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
10	Greenrise Technologies	Partial evidence	Nashville, TN, United StatesHQ checked Sep 22, 2026	501-1,000	135 contacts →
	Partial evidence “Stormwater Solutions That Work.” Source: RevenueBase Database · checked Sep 22, 2026
11	Earthworks Environmental, LLC	Partial evidence	Phoenix, FL, United StatesHQ checked Sep 22, 2026	51-200	126 contacts →
	Partial evidence “America's #1 Stormwater Consultants Earthworks Environmental, LLC provides top of the line storm water pollution prevention (SWPP/NPDES), erosion control and dust control…” Source: RevenueBase Database · checked Sep 22, 2026
12	Stormtrap	Indirect evidence	Romeoville, IL, United StatesHQ checked Sep 22, 2026	51-200	112 contacts →
	Indirect evidence “StormTrap offers proven, leading-edge solutions for managing runoff, protecting waterways and improving the use of your property.” Source: RevenueBase Database · checked Sep 22, 2026
13	USP Technologies	Partial evidence	Glen Allen, VA, United StatesHQ checked Sep 22, 2026	51-200	110 contacts →
	Partial evidence “USP Technologies provides performance-driven, full-service environmental treatment programs to help purify water, wastewater, soil and air.” Source: RevenueBase Database · checked Sep 22, 2026
14	Ground Water Treatment & Technology, LLC	Indirect evidence	Wharton, NJ, United StatesHQ checked Sep 22, 2026	51-200	106 contacts →
	Indirect evidence “GWTT is one of the only U.S.” Source: RevenueBase Database · checked Sep 22, 2026
15	World Water Works, INC	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 22, 2026	51-200	97 contacts →
	Partial evidence “At World Water Works, we strive to provide industrial and municipal customers with proven and cost-effective wastewater treatment solutions that deliver superior effluent quality.” Source: RevenueBase Database · checked Sep 22, 2026
16	Envirogen Technologies, INC	Indirect evidence	Kingwood, TX, United StatesHQ checked Sep 22, 2026	51-200	96 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
17	Prochem INC	Indirect evidence	Elliston, VA, United StatesHQ checked Sep 22, 2026	51-200	95 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
18	D&b Engineers And Architects	Indirect evidence	Woodbury, NY, United StatesHQ checked Sep 22, 2026	201-500	87 contacts →
	Indirect evidence “Founded in 1965, D&B Engineers and Architects (D&B) is committed to improving quality of life with innovative engineering solutions in sustainable, environmentally acceptable…” Source: RevenueBase Database · checked Sep 22, 2026
19	Integrated Water Services	Indirect evidence	Austin, TX, United StatesHQ checked Sep 22, 2026	51-200	86 contacts →
	Indirect evidence “We make water better.” Source: RevenueBase Database · checked Sep 22, 2026
20	Clean Water Technology	Indirect evidence	Gardena, CA, United StatesHQ checked Sep 22, 2026	51-200	83 contacts →
	Indirect evidence “Did you know you can remove up to 98% of contaminants from industrial wastewater while shrinking your chemical spend and footprint?” Source: RevenueBase Database · checked Sep 22, 2026
21	Samco Technologies	Indirect evidence	Buffalo, NY, United StatesHQ checked Sep 22, 2026	51-200	82 contacts →
	Indirect evidence “At SAMCO Technologies, Inc, we provide cutting-edge water, wastewater, and process separation solutions for some of the world’s most demanding industries, including power…” Source: RevenueBase Database · checked Sep 22, 2026
22	Water & Wastewater Equipment Company	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 22, 2026	11-50	80 contacts →
	Partial evidence “Water and Wastewater Equipment Company has been providing efficient, cost-effective and compliant solutions to water and wastewater treatment applications for over 30 years.” Source: RevenueBase Database · checked Sep 22, 2026
23	Kroff, INC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	79 contacts →
	Indirect evidence “One name.” Source: RevenueBase Database · checked Sep 22, 2026
24	Dragonfly Pond Works	Partial evidence	Raleigh-durham, FL, United StatesHQ checked Sep 22, 2026	51-200	75 contacts →
	Partial evidence “Dragonfly Pond Works is an environmental service company specializing in lake, pond, and stormwater management and beautification.” Source: RevenueBase Database · checked Sep 22, 2026
25	Clear Water Services	Partial evidence	Everett, WA, United StatesHQ checked Sep 22, 2026	51-200	72 contacts →
	Partial evidence “Clear Water Services provides innovative stormwater, groundwater, and process water solutions custom-designed for each client's unique goals, challenges, and mission.” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: stormwater treatment companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names stormwater treatment companies.
Partial evidence: Its own public description names part of stormwater treatment companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name stormwater treatment companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 837 stormwater treatment companies based in the United States

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Stormwater treatment companies based in the United States at a glance

As of Sep 22, 2026

38.8%Verified-email coverage

13.7Average contacts per company

11-50Median size (employees)

3.0%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

375

11-50

323

51-200

105

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 837 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among stormwater treatment companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “stormwater treatment companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names stormwater treatment companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among stormwater treatment companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 4,456 across the full list. 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 22, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Stormwater treatment companies by metro

Stormwater treatment companies in Houston25

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names stormwater treatment companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many stormwater treatment companies are there based in the United States?

RevenueBase identified 837 stormwater treatment companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Gradiant, headquartered in Woburn, tops this list with the largest team on record.

Which city has the most stormwater treatment companies?

Houston leads with 25 headquartered companies, followed by Tampa (9) and Austin (7).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,456 verified decision-maker contacts tracked across these 837 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 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 Smart Search, 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.