Company lists · Data refreshed November 2026

Top 25 Stormwater treatment system designers worldwide

RevenueBase identified 1,154 company matches for stormwater treatment system designers worldwide as of November 2026 and tracks 15,328 professional contacts across them, including 6,009 with verified work emails. The United States is the largest market and Austin the largest hub.

This list covers company matches for stormwater treatment system designers worldwide, 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. Country and city lists for stormwater treatment system designers follow the table.

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
1,154Companies
15,328Contacts tracked
6,009Verified emails
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The 25 largest stormwater treatment system designers worldwide

Ranked by team size
Top 25 of 1,154 company matches for stormwater treatment system designers worldwide, 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 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
2Exact matchDelhi, IndiaHQ recorded Nov 6, 2026501-1,000368 contacts →

Exact match

“Since 2009, Enviro has combined engineering excellence with a commitment to sustainability in water and wastewater solutions across India." Enviro Infra Engineers Limited stands…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMarlborough, AZ, United StatesHQ recorded Nov 6, 202651-200318 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLenting, GermanyHQ recorded Nov 6, 2026501-1,000251 contacts →

Exact match

“Draining water, treating wastewater and protecting against backwater: As drainage specialists, we protect people from the power of water and protect water from people.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchPune, IndiaHQ recorded Nov 6, 2026201-500193 contacts →

Exact match

“HNB ENGINEERS PVT.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchSutherlin, OR, United StatesHQ recorded Nov 6, 2026201-500177 contacts →

Exact match

“Nobody wants to worry about whether their wastewater is contaminating nearby rivers, streams, and wells.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSydney Olympic Park, AustraliaHQ recorded Nov 6, 2026201-500171 contacts →

Exact match

“At Atlan Stormwater, we draw on more than 45 years’ experience in the design, testing and manufacture of water treatment systems that are utilised in over 45 countries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSaint-jean-sur-richelieu, QC, CanadaHQ recorded Nov 6, 2026501-1,000168 contacts →

Exact match

“1st developer of solutions for mastering water sustainably.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchMorrisville, CO, United StatesHQ recorded Nov 6, 2026501-1,000151 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 · Nov 6, 2026 · View company records in RevenueBase
10Exact matchScottsdale, NM, United StatesHQ recorded Nov 6, 202651-200148 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchIndianapolis, IN, United StatesHQ recorded Nov 6, 202651-200145 contacts →

Exact match

“As a representative of your community or industry, what are your primary concerns?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSheboygan, IN, United StatesHQ recorded Nov 6, 202651-200138 contacts →

Exact match

“Donohue & Associates is an employee-owned, multi-disciplined engineering firm dedicated to one focus: water.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchNashville, TN, United StatesHQ recorded Nov 6, 2026501-1,000134 contacts →

Exact match

“Stormwater Solutions That Work.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchPhoenix, IL, United StatesHQ recorded Nov 6, 202651-200128 contacts →

Exact match

“America's #1 Stormwater Consultants Earthworks Environmental, LLC provides top of the line storm water pollution prevention (SWPP/NPDES), erosion control and dust control…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchWharton, NJ, United StatesHQ recorded Nov 6, 202651-200125 contacts →

Exact match

“GWTT is one of the only U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchFullerton, UT, United StatesHQ recorded Nov 6, 202611-50125 contacts →

Exact match

“CWE, an Apex Company, is a dynamic, award-winning civil engineering firm composed of engineers, scientists, designers, and construction support professionals.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchIndianapolis, IN, United StatesHQ recorded Nov 6, 202651-200118 contacts →

Exact match

“Wessler Engineering is a civil and environmental engineering firm, specializing in wastewater, drinking water, and stormwater projects, providing services ranging from master…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchRomeoville, IL, United StatesHQ recorded Nov 6, 202651-200112 contacts →

Exact match

“StormTrap offers proven, leading-edge solutions for managing runoff, protecting waterways and improving the use of your property.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSprimont, BelgiumHQ recorded Nov 6, 202651-200112 contacts →

Exact match

“In business since 1965, the Belgian company Eloy Water specialises in wastewater treatment and rainwater harvesting for both households, small and large communities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchWoodbury, PA, United StatesHQ recorded Nov 6, 2026201-500105 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMulgrave, AustraliaHQ recorded Nov 6, 202651-20098 contacts →

Exact match

“CMP Consulting Group is a multi-disciplinary Engineering firm specialising in design, project management and construction phase services for the Water Industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchKfar Saba, IsraelHQ recorded Nov 6, 202651-20094 contacts →

Exact match

“Engineering a Sustainable Future, One Project at a Time Founded in Israel in 1996, DHV MED has become a leader in environmental engineering and consulting.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchEssen, GermanyHQ recorded Nov 6, 202651-20091 contacts →

Exact match

“DAHLEM is an engineering company headquartered in Essen, Germany, with offices in Darmstadt, Würzburg, Berlin, Stuttgart, Montenegro and Albania.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchRaleigh-durham, NC, United StatesHQ recorded Nov 6, 202651-20091 contacts →

Exact match

“Dragonfly Pond Works is an environmental service company specializing in lake, pond, and stormwater management and beautification.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchAlcoa, TN, IndiaHQ recorded Nov 6, 202651-20090 contacts →

Exact match

“LDA Engineering is an employee-owned, Civil and Environmental Engineering firm with offices in Knoxville, Chattanooga, Nashville, Tri-Cities, Memphis, TN and Charlotte, NC.”

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

Showing 25 of 1,154 stormwater treatment system designers worldwide

See the full list, filter by size, metro and specialty, and access 6,009 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Stormwater treatment system designers worldwide at a glance

As of Nov 6, 2026
39.2%Verified-email coverage
13.3Average contacts per company
1-10Median size (employees)
0.8%Largest-city concentration · Austin
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
646
11-50
348
51-200
112
201-500
17
501-1,000
8
1,001-5,000
2

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for stormwater treatment system designers are linked below.
What qualifies
Company records worldwide whose business descriptions match “stormwater treatment system designers” 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. 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 6,009 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.

Stormwater treatment system designers by location

6 lists · largest first

Every Stormwater treatment system designers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 “stormwater treatment system designers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many stormwater treatment system designers are there worldwide?

RevenueBase identified 1,154 company matches for stormwater treatment system designers worldwide 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?

Carollo Engineers tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most stormwater treatment system designers?

The United States leads with 417 companies, followed by Germany (56) and France (52). Every stormwater treatment system designers list by country and city is linked on this page.

Which city has the most stormwater treatment system designers?

Austin leads with 9 company records, followed by Portland (9) and Calgary (6).

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 6,009 professional contacts with verified work emails tracked across these 1,154 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.