Company lists · Data refreshed September 2026
Top 24 Greywater recycling systems based in the United States
RevenueBase identified 47 greywater recycling systems headquartered in the United States as of September 2026 and tracks 318 professional contacts across them, including 134 with verified work emails. Bend is the largest hub.
This list covers greywater recycling systems 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 20, 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.
The 24 largest greywater recycling systems based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 55 contacts → | ||||
Partial evidence “Kemco Systems, a CECO Environmental Brand, designs and manufactures energy and water conservation systems for Water Reuse/Recycle, Wastewater Treatment, Wastewater Filtration…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 29 contacts → | ||||
Strong evidence “Water | Wastewater | Greywater | Stormwater BioMicrobics, SeptiTech, and Scienco/FAST manufacture integrated, sustainable, water utilization treatment systems land and sea.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 24 contacts → | ||||
Indirect evidence “Buildings globally use around 15% of all potable water, but very few buildings reuse that water.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 19 contacts → | ||||
Partial evidence “RainHarvest Systems is your comprehensive resource for residential and commercial water harvesting, treatment and reuse products and systems.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 18 contacts → | ||||
Partial evidence “At Streamkey Inc, we specialize in custom engineered water and wastewater systems for a variety of commercial and residential applications.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 16 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 12 contacts → | ||||
Partial evidence “Full Circle Water develops and builds simple-to-use, turnkey wastewater solutions that make recycling water easier, less time-consuming and more cost-effective.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 10 contacts → | ||||
Indirect evidence “Once a government monopoly, clean water is going private.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 9 contacts → | ||||
Indirect evidence “At Water Harvesting Solutions (Wahaso), we are a team that brings experience, skill and passion about water conservation to every client project.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 8 contacts → | ||||
Strong evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 7 contacts → | ||||
Indirect evidence “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.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6 contacts → | ||||
Partial evidence “Exergy revolutionizes water and recycling solutions to confront pervasive overconsumption in the manufacturing industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 5 contacts → | ||||
Partial evidence “WATSON DESIGNS & BUILDS WATER TREATMENT SYSTEMS ADDRESSING SPECIFIC WATER QUALITY ISSUES.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Partial evidence “Greywater Corps is the only company in the Los Angeles area specializing in water resiliency.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 4 contacts → | ||||
Strong evidence “Clivus Multrum, Inc, designs, manufactures, and sells composting toilets and greywater irrigation systems, with the aim of conserving water and keeping the nutrients in human…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3 contacts → | ||||
Indirect evidence “Commonwealth H2O – Blue Ridge is a full service water conservation and conditioning company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 2 contacts → | ||||
Partial evidence “Geomat is a closed-loop water recovery system that recycles and captures all water used in indoor agriculture.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 2 contacts → | ||||
Indirect evidence “A Sustainable Landscaping Cooperative set out to help the Santa Clara County conserve its precious resources by saving on water, energy & maintenance costs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2 contacts → | ||||
Indirect evidence “Our mission is to preserve the world's water for future generations and protect our customers from rising water costs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 contacts → | ||||
Partial evidence “We research, develop, and apply cutting-edge, sustainable solutions for wastewater treatment systems, helping companies cut costs, increase revenue, and reduce their carbon…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Strong evidence “At CatchingH2O, we help homeowners, businesses, and organizations create smarter, more resilient water systems through rainwater harvesting and greywater reuse.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Partial evidence “Cactus Rain LLC helps people throughout New Mexico reduce water consumption, harvest rainwater, and reuse greywater in inspired ways.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Indirect evidence “Laero is a design studio specializing in clean, innovative building technologies.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Strong evidence “The Foss Toilet is a water-recycling toilet system, with zero liquid discharge, that lets you "go" anywhere.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: greywater recycling systems. 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 greywater recycling systems.
- Partial evidence
- Its own public description names part of greywater recycling systems, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name greywater recycling systems. 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 24 of 47 greywater recycling systems based in the United States
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Greywater recycling systems based in the United States at a glance
As of Sep 20, 2026Companies by employee count
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 47 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 greywater recycling systems, 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 “greywater recycling systems”. 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 greywater recycling systems), 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 greywater recycling systems, 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, 134 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 20, 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.
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 greywater recycling systems, 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 greywater recycling systems are there based in the United States?
RevenueBase identified 47 greywater recycling systems 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?
Kemco Systems, headquartered in Clearwater, tops this list with the largest team on record.
Which city has the most greywater recycling systems?
Bend leads with 2 headquartered companies, followed by Clearwater (2) and Lawrence (2).
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 134 verified decision-maker contacts tracked across these 47 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 20, 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.
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