Company lists · Data refreshed November 2026

Top 25 Greywater system builders worldwide

RevenueBase identified 130 company matches for greywater system builders worldwide as of November 2026 and tracks 576 professional contacts across them, including 191 with verified work emails. The United States is the largest market and San Jose the largest hub.

This list covers company matches for greywater system builders 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 greywater system builders 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
130Companies
576Contacts tracked
191Verified emails
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The 25 largest greywater system builders worldwide

Ranked by team size
Top 25 of 130 company matches for greywater system builders 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 matchKirklington, United KingdomHQ recorded Nov 6, 202611-5048 contacts →

Exact match

“The UK's market leading suppliers of Rainwater Harvesting, Greywater Recycling, and Water Reuse Systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchKunda Park, AustraliaHQ recorded Nov 6, 202651-20033 contacts →

Exact match

“As the team behind the Ozzi Kleen product range, we strive to engineer, produce and maintain the highest level of quality not only for the pride we take in delivering reliable…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchCincinnati, OH, United StatesHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“At Streamkey Inc, we specialize in custom engineered water and wastewater systems for a variety of commercial and residential applications.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchAustin, TX, United StatesHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“Innovative Water Solutions LLC is a full-service water conservation system design / build company that specializes in integrated water demand and supply management for residential…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5017 contacts →

Exact match

“Aquality Trading & Consulting Ltd is one of the longest established and leading suppliers of Rainwater Harvesting and Greywater Recycling systems in the UK and France.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBarrie, ON, CanadaHQ recorded Nov 6, 202611-5015 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchWoking, United KingdomHQ recorded Nov 6, 20261-1013 contacts →

Exact match

“We offer a range of products and services designed to help you use less water, waste less water and save more water.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchOakstown, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“O'Reilly Oakstown provides an environmentally responsible wastewater treatment solution for both homes and businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchBarueri, BrazilHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Atuamos no mercado de Irrigação há mais de 35 anos, com os seguintes serviços- Projeto de Sistemas de Irrigação - Implantação Sistemas de Irrigação para jardins residenciais…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHinsdale, IL, United StatesHQ recorded Nov 6, 20261-1010 contacts →

Exact match

“At Water Harvesting Solutions (Wahaso), we are a team that brings experience, skill and passion about water conservation to every client project.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchUnited KingdomHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Sustainable water solutions, including residential and commercial automatic irrigation systems, SUDS, Greywater Recycling Systems, Pump Stations, Borehole pump systems, Rainwater…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchPune, IndiaHQ recorded Nov 6, 20261-109 contacts →

Exact match

“JalSevak Solutions is an Indian startup in wastewater management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSherbrooke, QC, CanadaHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Wastewater treatment and reuse solutions for off-grid residences, as well as commercial, community, and institutional projects.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchChatswood, AustraliaHQ recorded Nov 6, 202611-508 contacts →

Exact match

“The leader in grey water and macerator pumps for the home and business.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchDuffel, BelgiumHQ recorded Nov 6, 20261-107 contacts →

Exact match

“Nature Solutions begeleidt ondernemingen die het volledige waterbeleid van hun bedrijfsgebouwen en -terreinen willen optimaliseren.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchHampton, NH, United StatesHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Water Treatment Solutions custom designs and installs patented and patent pending water filtration and recycling systems developed for the varied water needs of the stone, glass…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLaprairie, QC, CanadaHQ recorded Nov 6, 20261-107 contacts →

Exact match

“Water & Energy recycling”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchMelton Mowbray, United KingdomHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Kirton design and build state-of-the-art solutions that help industrial, commercial and domestic clients use water safely, more efficiently and in compliance with ever increasing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchMiami Beach, FL, United StatesHQ recorded Nov 6, 20261-106 contacts →

Exact match

“In collaboration with engineers, architects, and developers, we are building a more secure world by helping communities achieve water resilience, where potable water is protected.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchValdemoro, SpainHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Aqua Resmat Ibérica forma parte del grupo MTA, una corporación fundada en 1960 especializada en aportar al mercado soluciones globales para el Control, Tratamiento y Depuración de…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchDubai, United Arab EmiratesHQ recorded Nov 6, 202611-506 contacts →

Exact match

“Water Pioneers is one of the best firms in the United Arab Emirates for designing, installing, and commissioning water and Grey-water systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSchwerin, GermanyHQ recorded Nov 6, 202651-2005 contacts →

Exact match

“Wir entwickeln und realisieren Systeme für dezentrales Wassermanagement – von Regenwassernutzung bis Grauwasserrecycling.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchKingston, ON, CanadaHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Purafy designs and manufactures proprietary water filtration systems.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchTalence, FranceHQ recorded Nov 6, 20261-105 contacts →

Exact match

“L’eau est au centre de nos préoccupations et notre mission est de valoriser et d’optimiser cette ressource au maximum.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchJabbeke, BelgiumHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Hoewel drinkwater nog steeds een betaalbare grondstof is in vergelijking met hoe waardevol en schaars het wordt, is de trend van stijgende drinkwaterprijzen een oproep om uw…”

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

Showing 25 of 130 greywater system builders worldwide

See the full list, filter by size, metro and specialty, and access 191 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Greywater system builders worldwide at a glance

As of Nov 6, 2026
33.2%Verified-email coverage
4.4Average contacts per company
1-10Median size (employees)
2.3%Largest-city concentration · San Jose
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
85
11-50
40
51-200
4

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 greywater system builders are linked below.
What qualifies
Company records worldwide whose business descriptions match “greywater system builders” 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 191 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.

Greywater system builders by location

1 lists · largest first

Every Greywater system builders 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 “greywater system builders”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many greywater system builders are there worldwide?

RevenueBase identified 130 company matches for greywater system builders 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?

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

Which country has the most greywater system builders?

The United States leads with 30 companies. Every greywater system builders list by country and city is linked on this page.

Which city has the most greywater system builders?

San Jose leads with 3 company records, followed by Warsaw (3) and Aachen (2).

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 191 professional contacts with verified work emails tracked across these 130 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.