Best Water and Wastewater Management Tech Companies in United States
The 707 best Water and Wastewater Management Tech companies in United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Solugen.
Water and Wastewater Management Tech companies in the United States don't lack for ambition, and this directory ranks 707 of them by disclosed equity funding and recent funding momentum. Combined, they've pulled in $4.2 billion in disclosed capital, a figure that reflects genuine industrial scale, not wishful projections. Gradiant leads the pack at $400 million raised, with SOURCE close behind at $239 million. Those two alone account for roughly 15% of the total pool. Two unicorns have emerged from the cohort, which tells you the ceiling here is real. The sector's CAGR sits at approximately 5.8%, driven by accelerating urbanization, intensifying water scarcity concerns, and a global push to modernize urban drainage infrastructure.
So what separates the companies worth watching from the noise? I'd point to funding concentration as your first filter. NanoH2O at $90 million and Claros Technologies at $48 million represent the mid-tier doing serious work, while Klir and Crew Carbon show early traction at $19 million and $5 million respectively. Imagine H2O and the National Science Foundation anchor the investor side, lending credibility to a sector that regulators and municipalities increasingly can't ignore. Desalination expansion is adding another demand layer, and the companies positioned across treatment technology and infrastructure software are the ones drawing repeat institutional attention.
- prnewswire.com
Ranked: Best Water and Wastewater Management Tech companies in United States
| # | Company | Disclosed funding | Last round | Employees | Founded | Founder | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Solugen 🦄 Developer of industrial solutions for oil and gas, fuels, and defense | $637M | 43 mo ago | 99 | 2016 | Sean Hunt Co-Founder & CTO | WordPressMySQLPHP+26 | 210 patents Patents concentrated in chemistry & materials | — |
| 2 | Gradiant 🦄 Provider of industrial water treatment solutions and technologies 78Patents top 21%Moat top 22%Funding top 26%Innovation top 29% All 11 signals ▾Patentstop 21% Moattop 22% Fundingtop 26% Innovationtop 29% Globaltop 30% Markettop 33% Growthtop 35% Fin. healthtop 37% Techtop 40% Newstop 42% Talentbottom 49% Patents: 256 patents matched (strict assignee match) · 103 filings since 2022 vs 108 in 2017-21 Moat: Editorial + unicorn rating 9/10 · IP moat: 256 patents rank vs industry peers · Fliar Intelligence Index 78/100 | $400M | 1 mo ago | 900 | 2013 | Anurag Bajpayee Co-Founder & CEO | WordPressApple iCloud MailAlgolia+30 | 256 patents Patents concentrated in transport & manufacturing processes | — |
| 3 | SOURCE Manufacturer of solar powered systems that extract water from air | $239M | 15 mo ago | 109 | 2015 | Shikha Kapur Co-Founder | ShopifyTailwind CSSShopPad Infinite Options+25 | 24 patents Media handling and sensor-driven print optimization hardware for industrial printing systems | — |
| 4 | Bevi Provider of smart water dispenser system provider | $136M | 46 mo ago | 102 | 2013 | Sean Grundy Co-Founder & CEO | WordPressMarkerZendesk+43 | 3 patents Sealed flexible beverage pouch technology and automated manufacturing equipment | 1 job opening |
| 5 | ZwitterCo Manufacturer of wastewater treatment systems using membrane technology 60Funding top 24%Product top 30%Innovation top 33%Moat top 37% All 11 signals ▾Fundingtop 24% Producttop 30% Innovationtop 33% Moattop 37% Techtop 38% Talenttop 38% Patentstop 39% Growthtop 40% Globalbottom 39% Marketbottom 38% Newsbottom 21% Funding: Raised $102M across 5 rounds · 5 rounds over 6 yrs (0.8/yr) Product: 8 distinct product lines · Company stage: Series B rank vs industry peers · Fliar Intelligence Index 60/100 | $102M | 23 mo ago | 57 57 → 86 (+51%) | 2018 | Christopher Drover Co-Founder & CTO | WordPressSentryMySQL+39 | 14 patents Patents concentrated in chemistry & materials | 1 launch |
| 6 | NanoH2O Developer of reverse osmosis membranes for water treatment 76Growth top 13%Funding top 24%Patents top 41%Market top 43% All 8 signals ▾Growthtop 13% Fundingtop 24% Patentstop 41% Markettop 43% Moattop 45% Innovationtop 46% Newsbottom 44% Globalbottom 42% Growth: Headcount 15 → 120 (+700%) across vintages · Fresh capital in last 24 mo Funding: Raised $89.9M across 8 rounds · 8 rounds over 19 yrs (0.4/yr) rank vs industry peers · Fliar Intelligence Index 76/100 | $90M | 6 mo ago | 120 | 2005 | — | — | 95 patents Enhanced thin‑film composite membrane technology for high‑flux water desalination | — |
| 7 | Nauticus Robotics Developer of underwater robotics and AI-powered control software | $62M | 28 mo ago | 93 93 → 49 (-47%) | 2014 | Nicolaus Radford Founder & CEO | WordPressSentryApple iCloud Mail+26 | — | — |
| 8 | 120Water Provider of digital water management solutions for government agencies and water systems | $58M | 29 mo ago | 70 | 2016 | — | WebflowVimeoYouTube+17 | — | — |
| 9 | Wint AI-based water leakage detection solution provider | $50M | 34 mo ago | 110 | 2011 | Yaron Dycian Co-founder & Chief Strategy Officer | WordPressMySQLPHP+35 | — | — |
| 10 | Streamline Innovations Technology solutions provider for water treatment | $48M | 9 mo ago | 61 61 → 92 (+51%) | 2015 | — | WordPress Block EditorWordPressApple iCloud Mail+26 | 21 patents Desulfurization and purification of gas streams, especially H₂S removal from biogas. | — |
| 11 | Claros Technologies Provider of sustainable solutions for circular economy 32Funding top 26%Talent top 38%Moat top 39%Tech bottom 43% All 7 signals ▾Fundingtop 26% Talenttop 38% Moattop 39% Techbottom 43% Newsbottom 42% Globalbottom 36% Marketbottom 30% Funding: Raised $47.7M across 8 rounds · 8 rounds over 5 yrs (1.6/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 32/100 | $48M | 10 mo ago | 20 | 2015 | Michelle Bellanca Co-Founder & CEO | WordPressMySQLPHP+16 | — | 2 awards |
| 12 | Ketos Water Provider of automated systems for real-time water quality monitoring | $45M | 24 mo ago | 36 36 → 54 (+50%) | 2015 | Meena Sankaran Founder & CEO | WordPressMySQLPHP+36 | — | — |
| 13 | Fluence Provider of Integrated water and wastewater management services | $42M | 31 mo ago | 203 | 2007 | — | WordPressMySQLPHP+33 | 4 patents Advanced water filtration and desalination technologies for oilfield produced water treatment | — |
| 14 | Cambrian Innovation Bio-electro-chemical wastewater treatment systems developer | $37M | 12 mo ago | 23 | 2006 | Matthew Silver Co-Founder & CEO | WebflowGSAPMicrosoft Advertising+21 | 70 patents Anaerobic wastewater treatment and bioelectrochemical conversion to renewable natural gas | 1 partnership |
| 15 | Membrion Developer of membranes for the flow battery market | $32M | 12 mo ago | 29 | 2016 | Greg Newbloom President & CEO | — | 39 patents Ceramic ion‑exchange membranes for selective capture and separation of chemicals | — |
| 16 | ARIX Technologies Provider of pipeline inspection robots | $21M | 18 mo ago | 21 | 2017 | Dianna Liu Founder & President | HubSpot CMS HubYouTubecore-js+12 | — | — |
| 17 | EvolOH Manufacturer of electrolyzer stacks for clean hydrogen production | $20M | 26 mo ago | 13 | 2020 | Jimmy Rojas Founder & CEO | WordPressMySQLPHP+14 | 53 patents Advanced water electrolysis hardware, membrane assemblies, and oxygen evolution catalysts. | — |
| 18 | ITpipes Provider of solutions for pipeline inspection | $20M | 22 mo ago | 18 | 2009 | — | WordPressMySQLPHP+48 | — | 1 partnership |
| 19 | Klir Water management software for utilities 53Funding top 34%Growth top 35%Talent top 38%Moat top 39% All 9 signals ▾Fundingtop 34% Growthtop 35% Talenttop 38% Moattop 39% Producttop 46% Techtop 49% Newsbottom 42% Marketbottom 41% Globalbottom 36% Funding: Raised $19.2M across 5 rounds · 5 rounds over 8 yrs (0.6/yr) Growth: Fresh capital in last 24 mo rank vs industry peers · Fliar Intelligence Index 53/100 | $19M | 4 mo ago | 65 | 2017 | Elaine Kelly Co-Founder | WebflowHubSpotcore-js+20 | — | 1 job opening |
| 20 | Infinite Cooling Technology developer for capturing water from cooling tower plumes | $16M | 13 mo ago | 13 13 → 16 (+23%) | 2017 | Kripa Varanasi Co-Founder | WixSentryBootstrap+13 | 19 patents Optimizing industrial cooling tower control and gas‑stream condensate/particle collection technologies. | — |
| 21 | Irrigreen Manufacturer of smart sprinkler systems designed for efficient lawn watering | $15M | 13 mo ago | 34 | 2013 | Gary Klinefelter Founder | Cart FunctionalityShopifyApple iCloud Mail+26 | 24 patents Sensor‑integrated rotary irrigation sprinklers with pressure monitoring and unit identification | — |
| 22 | AirJoule Technologies Developer of sorption technologies for water production, recovery, cooling, and control | $15M | 13 mo ago | — | 2018 | Abe Mammen Co-Founder | WordPress Block EditorWordPressApple iCloud Mail+21 | — | — |
| 23 | Quantitative BioSciences Developer of irrigation water management solutions | $14M | 14 mo ago | 9 | 2010 | — | Cart FunctionalitySquarespace CommerceSquarespace+13 | — | — |
| 24 | Genesis Systems Manufacturer of atmospheric water generators for residential and industrial use | $13M | 17 mo ago | 6 | 2016 | David Stuckenberg Co-Founder | SanityCart FunctionalityTurbopack+27 | — | 1 launch |
| 25 | Epic Cleantec Provider of wastewater infrastructure development services | $12M | 18 mo ago | 8 | 2015 | Igor Tartakovsky Co-founder and Chief Engineer | WordPressMySQLPHP+24 | 22 patents Wastewater treatment with heat recovery, biosolids conversion, and water reuse technologies. | 1 job opening |
| 26 | Plutoshift AI-powered performance monitoring platform for industrial water assets and processes | $11M | 22 mo ago | 18 | 2016 | — | — | — | — |
| 27 | Pani Provider of AI-based connected water purifiers | $10M | 22 mo ago | 9 | 2018 | Allen Tsai Founder | — | — | — |
| 28 | CycloPure Micropollutants removal technology solutions provider | $10M | 15 mo ago | 17 17 → 27 (+59%) | 2016 | Frank Cassou Co-Founder & CEO | WordPressMySQLPHP+34 | 44 patents Cyclodextrin polymer adsorbents for PFAS removal and degradation. | 1 partnership |
| 29 | Plasma Waters Provider of plasma-activated water solutions for sustainable agriculture | $10M | 15 mo ago | — | 2019 | Alfredo Zolezzi Founder & CIO | WordPress Block EditorElementorWordPress+19 | — | — |
| 30 | H2Ok Innovations Provider of solutions for water quality monitoring | $7M | 17 mo ago | 17 | 2019 | David Lu Co-Founder and CTO | — | — | 2 awards |
| 31 | PolyGone Artificial root filter technology to remove microplastics from waterways 16Funding top 34%Talent top 38%Global bottom 29%Market bottom 20% All 4 signals ▾Fundingtop 34% Talenttop 38% Globalbottom 29% Marketbottom 20% Funding: Raised $6.7M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) Talent: 2 named leaders on record · 2 C-suite/founder profiles curated rank vs industry peers · Fliar Intelligence Index 16/100 | $7M | 3 mo ago | 7 | 2021 | Nathaniel Banks Co-Founder | — | — | 1 award |
| 32 | Divirod Provider of water data, monitoring, analytics, and early flood warning | $6M | 21 mo ago | 12 | 2016 | — | Cart FunctionalitySquarespace CommerceSquarespace+16 | 6 patents Fiber-optic reflectometry sensors for precise signal and fault detection | — |
| 33 | Crew Carbon Developer of a platform removing greenhouse gas emissions from wastewater | $5M | 1 mo ago | 5 | 2022 | Joachim Katchinoff Co-Founder & CEO | — | — | 1 job opening · 1 internship |
| 34 | Notation Labs Provider of smart water conservation products | $4M | 18 mo ago | — | 2020 | Michael Stebbins Co-Founder & CEO | — | 4 patents Home water quality monitoring and high‑sensitivity, non‑obstructive flow sensing devices | — |
| 35 | Aqueduct Software Software solution for water and wastewater management | $4M | 6 mo ago | — | 2022 | Aaron Rosenberg Co-Founder | — | — | — |
| 36 | Molecule Works Provider of water treatment solutions | $4M | 22 mo ago | — | 2015 | Wei Liu CEO | — | — | — |
| 37 | Hydrosome Labs Platform using technology that enhances the bioavailability of water | $4M | 19 mo ago | — | 2021 | Paul Gadbut President and CEO | WordPressMySQLPHP+20 | 16 patents Ultrafine bubble delivery systems for beverages, cosmetics, pharma, and agricultural applications | 1 partnership |
| 38 | Nirova Developer of monitoring systems for anaerobic digester biological process stability | $3M | 2 mo ago | — | 2022 | Will Charlton Founder & CTO | — | — | 1 launch · 1 expansion |
| 39 | MFNS Tech Developer of nanocoating solutions for cleaning water | $2M | 10 mo ago | 3 | 2019 | Vikas Nandwana Co-Founder & CTO | — | — | 1 launch |
| 40 | Active Membranes Developer of electro-active membrane technology for desalination and water treatment 27Talent top 38%Moat top 48%Funding bottom 46%Market bottom 40% All 5 signals ▾Talenttop 38% Moattop 48% Fundingbottom 46% Marketbottom 40% Globalbottom 36% Talent: 2 named leaders on record · 2 C-suite/founder profiles curated Moat: Editorial + unicorn rating 4/10 · 9 curated direct competitors tracked rank vs industry peers · Fliar Intelligence Index 27/100 | $2M | 12 mo ago | — | 2022 | Eric Hoek Co-Founder | — | — | — |
| 41 | WaHa Developer of atmospheric water generation and energy-efficient air conditioning technology | $2M | 11 mo ago | 5 | 2018 | David Kuo Founder and Executive Vice President | WordPress Block EditorElementorWordPress+22 | — | 2 launchs · 1 partnership |
| 42 | Loggerhead Manufacturer of underwater passive acoustic dataloggers. | $2M | 15 mo ago | 3 | 2004 | — | Cart FunctionalitySquarespace CommerceSquarespace+15 | — | — |
| 43 | Kara Water Manufacturer of air-to-water devices producing mineral-rich alkaline water and coffee | $2M | 12 mo ago | 9 | 2017 | Bill I Co-Founder | Cart FunctionalityShopifyTailwind CSS+32 | — | — |
| 44 | Kairos Provider of solutions for water leak detection and control system | $2M | 6 mo ago | 27 | 2017 | Dean Fung-A-Wing Co-Founder & CEO | — | 5 patents Additive manufacturing defect detection and on‑demand 3D part generation for repair | — |
| 45 | Voda AI-enabled software solution for pipe breakage prediction | $1M | 12 mo ago | 25 | 2017 | Jim Fitchett Chief Operating Officer & Co-Founder | WordPress Block EditorWordPressMySQL+32 | 9 patents Patents concentrated in computing, sensing & instrumentation | 2 launchs |
| 46 | Next TFX Developer of ultra-high-pressure reverse osmosis membranes for water and mineral recovery | $1M | 3 mo ago | — | 2025 | Eric Hoek Co-Founder & CEO | — | — | — |
| 47 | Thrive Smart Systems Provider of smart watering solutions for home gardeners | $1M | 14 mo ago | 3 | 2018 | Bryan Brittain Co-Founder | WordPressMySQLPHP+22 | — | — |
| 48 | NALA Developer of chlorine-resistant reverse osmosis membranes | $700K | 4 mo ago | 18 | 2018 | Sue Mecham Co-Founder & CEO | Cart FunctionalityWixSentry+14 | — | 1 award |
| 49 | OXbyEL Technologies Technology solution for water treatment | $375K | 9 mo ago | 5 | 2018 | Preston Montalvo Co-Founder | — | — | — |
| 50 | FarmHQ Smart irrigation control system | $325K | 10 mo ago | 8 | 2020 | — | WordPressMySQLPHP+33 | — | — |
Top 12 Water and Wastewater Management Tech companies in United States
#1
Gradiant 🦄Series E · Woburn, Massachusetts · founded 2013 · 900 employees$400Mraised▾
Provider of industrial water treatment solutions and technologies. It offers end-to-end, turnkey treatment systems engineered to meet specific customer requirements. Services include water reduction, reclamation, and renewal, recovering valuable resources from wastewater. Custom chemical formulations are developed in-house to support these technologies. The company's solutions address various industrial sectors, focusing on minimizing environmental impact and optimizing water usage. Technologies include those for PFAS removal, lithium extraction, and green hydrogen production.
- May 2026Series E—
- Oct 2025Conventional Debt$50M
- May 2023Series D$225M
- Jun 2021Series C$104.8M
#2
Acquired · Los Angeles, California · founded 2005 · 120 employees$89.9Mraised▾
Developer of reverse osmosis membranes for water treatment. The company developed thin-film nanocomposite QuantumFlux membranes for seawater and brackish water desalination, as well as wastewater reclamation.
- Dec 2025Series D—
- Apr 2012Conventional Debt$20.5M
- Apr 2012Series C$40M
- Dec 2011Series C$14.9M
#3
Series B · Reno, Nevada · founded 2017 · 65 employees$19.2Mraised▾
Water management software for utilities. It offers an integrated platform that consolidates water quality, compliance management, and system performance data, providing full visibility and enabling utilities to achieve compliance all the time. It streamlines processes, enhances cybersecurity, and offers comprehensive tools for managing water compliance. It allows utilities to track progress against regulatory and operational requirements.
- Jan 2026Conventional Debt$7.5M
- Dec 2025Series B$10.1M
- Nov 2021Series A$16M
- Oct 2020Series A$3.1M
#4
Series A · Brooklyn, New York · founded 2022 · 5 employees$5.3Mraised▾
Developer of a platform removing greenhouse gas emissions from wastewater. It provides users with a company focused on removing greenhouse gas emissions by utilizing enhanced weathering technology to store CO2 permanently. Their platform uses natural weathering to treat wastewater and remove carbon dioxide from municipal and industrial systems.
- May 2026Grant (prize money)$6M
- May 2026Series A$19M
- Oct 2024Seed$5.3M
#5
Series D · Scottsdale, Arizona · founded 2015 · 109 employees$238.9Mraised▾
Manufacturer of solar powered systems that extract water from air. These systems utilize atmospheric water vapor to produce liquid water. The technology employs solar energy to convert vapor into a liquid state, which is then mineralized for consumption. The resulting water is stored within the unit until it is dispensed for use. These systems are designed for residential, community, and commercial applications.
- Feb 2025Series D$19.3M
- Jul 2022Series D$130M
- Apr 2022Series D$108.9M
- Jun 2020Series C$50M
#6
Series B · Saint Paul, Minnesota · founded 2015 · 20 employees$47.7Mraised▾
Provider of sustainable solutions for circular economy. It develops water sorbents to remove pollutants from water and enable the recovery of useful resources. The textiles are antiviral, antifungal, UV-resistant, odor-resistant, moisture-wicking, and more.
- Aug 2025Series B$10M
- Sep 2024Series B$700K
- May 2024Series B$22M
- Dec 2023Series B$18.2M
#7
Series C · San Antonio, Texas · founded 2015 · 61 employees$48.2Mraised▾
Streamline Innovations is a technology solutions provider for water treatment. Uses chemical treatment to process water for reuse. Solutions provided include H2S sour gas & acid gas treatment, FRAC pond aeration system, H2S sour groundwater treating, and others.
- Aug 2025Conventional Debt—
- Aug 2025Series C—
- Jun 2022Series C$48.2M
- Nov 2021Conventional Debt—
#8
Seed · Princeton, New Jersey · founded 2021 · 7 employees$6.7Mraised▾
Artificial root filter technology to remove microplastics from waterways. It offers a portable and affordable microplastic filter solution. It provides solutions to analyze, monitor, and remove microplastics.
- Feb 2026Seed$4M
- Jul 2025Seed$2.7M
- Aug 2022Seed—
#9
Series C · Boston, Massachusetts · founded 2006 · 23 employees$37Mraised▾
Bio-electro-chemical wastewater treatment systems developer. The company product suite uses bioelectrochemical systems in which electrically-active microbes oxidize in contact with electrodes & reduce organic fuels and contaminants in the water. The process generates 30-200 kilowatt power and can treat wastewater flows between 10,000 to 300,000 gallons per day. Provides bioelectrochemical nitrate sensor for surface water monitoring denitrification system electricity, hydrogen & methane generation solution for spacecraft. Also offers a financing service called as Water-Energy Purchase Agreement in which the company will construct, install, own, and operate the treatment system and the user needs to pay on a per-gallon basis.
- Jun 2025Conventional Debt$150M
- Nov 2023Series C$200M
- Feb 2022Series B$2.2M
- Oct 2019Series B$18M
#10
Seed · Boise, Idaho · founded 2022$3Mraised▾
Developer of monitoring systems for anaerobic digester biological process stability. These systems utilize sensors to measure spectral signals from influent and effluent streams. Proprietary algorithms convert these signals into chemical and biological parameters to assess system performance. The technology identifies patterns indicative of instability, allowing for adjustments to feedstock management and operational practices. By providing visibility into biological activity, the platform assists in maintaining stable conditions and managing gas production within industrial, agricultural, and municipal waste treatment facilities.
- Apr 2026Seed$3M
#11
Series B · Seattle, Washington · founded 2016 · 29 employees$32.2Mraised▾
Developer of membranes for the flow battery market. The company is engaged in the development of high-performance membranes to reduce the cost and improve the performance of flow batteries. Its first membrane is built for redox flow batteries, other potential use cases include pharmaceutical purification, fuel cells, and reverse osmosis.
- Jun 2025Series B$20M
- Feb 2025Series B$1M
- Nov 2024Series B$1.9M
- Aug 2023Series B$12.5M
#12
Series B · New York City, New York · founded 2022$4.5Mraised▾
Software solution for water and wastewater management. It provides a blueprint for preserving the data, knowledge, and expertise related to water and wastewater. It provides solutions such as data mangement, sample scheduling, water quality data collection, asset database, and more.
- Dec 2025Series B$21.9M
- Apr 2024Series A$4.5M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Water and Wastewater Management Tech coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Water Treatment is moving in the United States
A read on the academic research around Water Treatment — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 3,356 United States-affiliated papers.
- University of North Carolina at Chapel Hill127
- Environmental Protection Agency100
- Arizona State University67
- Stanford University66
- Purdue University West Lafayette60
- Adsorption12→68
- Membrane13→53
- Photocatalysis3→26
- Degradation (telecommunications)1→23
- Wastewater9→30
- Adsorption51→158
- Wastewater60→128
- Sewage treatment30→75
- Water quality62→96
- Degradation (telecommunications)11→40
- Water quality51→93
- Sewage treatment8→35
- Wastewater19→43
- Water supply17→30
- Reverse osmosis11→23
Where water treatment is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing water treatment patents in the United States
United States water treatment patent filing is cooling — 3,379 filings from 2,991 assignees (2016–2025), led by Siemens, General Electric, Access Business Group INT; annual filings 397→269.
- Siemens278
- General Electric185
- Access Business Group INT152
- Ecolab USA132
- Evoqua Water TECH116
- D C Water & Sewer Authority81
- Hampton Roads Sanitation Distr77
- 3M Innovative Properties69