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Radar · Water and Wastewater Management Tech in United States

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.

707companies tracked
$4.2Bdisclosed funding
2unicorns
274have raised

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.

Sources & further reading
  • prnewswire.com

Ranked: Best Water and Wastewater Management Tech companies in United States

#CompanyDisclosed fundingLast roundEmployeesFoundedFounderTech stackPatents & IP focusRecent signals
1Solugen 🦄
Developer of industrial solutions for oil and gas, fuels, and defense
$637M43 mo ago992016Sean Hunt
Co-Founder & CTO
WordPressMySQLPHP+26210 patents
Patents concentrated in chemistry & materials
—
2Gradiant 🦄
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
$400M1 mo ago9002013Anurag Bajpayee
Co-Founder & CEO
WordPressApple iCloud MailAlgolia+30256 patents
Patents concentrated in transport & manufacturing processes
—
3SOURCE
Manufacturer of solar powered systems that extract water from air
$239M15 mo ago1092015Shikha Kapur
Co-Founder
ShopifyTailwind CSSShopPad Infinite Options+2524 patents
Media handling and sensor-driven print optimization hardware for industrial printing systems
—
4Bevi
Provider of smart water dispenser system provider
$136M46 mo ago1022013Sean Grundy
Co-Founder & CEO
WordPressMarkerZendesk+433 patents
Sealed flexible beverage pouch technology and automated manufacturing equipment
1 job opening
5ZwitterCo
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
$102M23 mo ago57
57 → 86 (+51%)
2018Christopher Drover
Co-Founder & CTO
WordPressSentryMySQL+3914 patents
Patents concentrated in chemistry & materials
1 launch
6NanoH2O
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
$90M6 mo ago1202005——95 patents
Enhanced thin‑film composite membrane technology for high‑flux water desalination
—
7Nauticus Robotics
Developer of underwater robotics and AI-powered control software
$62M28 mo ago93
93 → 49 (-47%)
2014Nicolaus Radford
Founder & CEO
WordPressSentryApple iCloud Mail+26——
8120Water
Provider of digital water management solutions for government agencies and water systems
$58M29 mo ago702016—WebflowVimeoYouTube+17——
9Wint
AI-based water leakage detection solution provider
$50M34 mo ago1102011Yaron Dycian
Co-founder & Chief Strategy Officer
WordPressMySQLPHP+35——
10Streamline Innovations
Technology solutions provider for water treatment
$48M9 mo ago61
61 → 92 (+51%)
2015—WordPress Block EditorWordPressApple iCloud Mail+2621 patents
Desulfurization and purification of gas streams, especially H₂S removal from biogas.
—
11Claros 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
$48M10 mo ago202015Michelle Bellanca
Co-Founder & CEO
WordPressMySQLPHP+16—2 awards
12Ketos Water
Provider of automated systems for real-time water quality monitoring
$45M24 mo ago36
36 → 54 (+50%)
2015Meena Sankaran
Founder & CEO
WordPressMySQLPHP+36——
13Fluence
Provider of Integrated water and wastewater management services
$42M31 mo ago2032007—WordPressMySQLPHP+334 patents
Advanced water filtration and desalination technologies for oilfield produced water treatment
—
14Cambrian Innovation
Bio-electro-chemical wastewater treatment systems developer
$37M12 mo ago232006Matthew Silver
Co-Founder & CEO
WebflowGSAPMicrosoft Advertising+2170 patents
Anaerobic wastewater treatment and bioelectrochemical conversion to renewable natural gas
1 partnership
15Membrion
Developer of membranes for the flow battery market
$32M12 mo ago292016Greg Newbloom
President & CEO
—39 patents
Ceramic ion‑exchange membranes for selective capture and separation of chemicals
—
16ARIX Technologies
Provider of pipeline inspection robots
$21M18 mo ago212017Dianna Liu
Founder & President
HubSpot CMS HubYouTubecore-js+12——
17EvolOH
Manufacturer of electrolyzer stacks for clean hydrogen production
$20M26 mo ago132020Jimmy Rojas
Founder & CEO
WordPressMySQLPHP+1453 patents
Advanced water electrolysis hardware, membrane assemblies, and oxygen evolution catalysts.
—
18ITpipes
Provider of solutions for pipeline inspection
$20M22 mo ago182009—WordPressMySQLPHP+48—1 partnership
19Klir
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
$19M4 mo ago652017Elaine Kelly
Co-Founder
WebflowHubSpotcore-js+20—1 job opening
20​Infinite Cooling
Technology developer for capturing water from cooling tower plumes
$16M13 mo ago13
13 → 16 (+23%)
2017Kripa Varanasi
Co-Founder
WixSentryBootstrap+1319 patents
Optimizing industrial cooling tower control and gas‑stream condensate/particle collection technologies.
—
21Irrigreen
Manufacturer of smart sprinkler systems designed for efficient lawn watering
$15M13 mo ago342013Gary Klinefelter
Founder
Cart FunctionalityShopifyApple iCloud Mail+2624 patents
Sensor‑integrated rotary irrigation sprinklers with pressure monitoring and unit identification
—
22AirJoule Technologies
Developer of sorption technologies for water production, recovery, cooling, and control
$15M13 mo ago—2018Abe Mammen
Co-Founder
WordPress Block EditorWordPressApple iCloud Mail+21——
23Quantitative BioSciences
Developer of irrigation water management solutions
$14M14 mo ago92010—Cart FunctionalitySquarespace CommerceSquarespace+13——
24Genesis Systems
Manufacturer of atmospheric water generators for residential and industrial use
$13M17 mo ago62016David Stuckenberg
Co-Founder
SanityCart FunctionalityTurbopack+27—1 launch
25Epic Cleantec
Provider of wastewater infrastructure development services
$12M18 mo ago82015Igor Tartakovsky
Co-founder and Chief Engineer
WordPressMySQLPHP+2422 patents
Wastewater treatment with heat recovery, biosolids conversion, and water reuse technologies.
1 job opening
26Plutoshift
AI-powered performance monitoring platform for industrial water assets and processes
$11M22 mo ago182016————
27Pani
Provider of AI-based connected water purifiers
$10M22 mo ago92018Allen Tsai
Founder
———
28CycloPure
Micropollutants removal technology solutions provider
$10M15 mo ago17
17 → 27 (+59%)
2016Frank Cassou
Co-Founder & CEO
WordPressMySQLPHP+3444 patents
Cyclodextrin polymer adsorbents for PFAS removal and degradation.
1 partnership
29Plasma Waters
Provider of plasma-activated water solutions for sustainable agriculture
$10M15 mo ago—2019Alfredo Zolezzi
Founder & CIO
WordPress Block EditorElementorWordPress+19——
30H2Ok Innovations
Provider of solutions for water quality monitoring
$7M17 mo ago172019David Lu
Co-Founder and CTO
——2 awards
31PolyGone
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
$7M3 mo ago72021Nathaniel Banks
Co-Founder
——1 award
32Divirod
Provider of water data, monitoring, analytics, and early flood warning
$6M21 mo ago122016—Cart FunctionalitySquarespace CommerceSquarespace+166 patents
Fiber-optic reflectometry sensors for precise signal and fault detection
—
33Crew Carbon
Developer of a platform removing greenhouse gas emissions from wastewater
$5M1 mo ago52022Joachim Katchinoff
Co-Founder & CEO
——1 job opening · 1 internship
34Notation Labs
Provider of smart water conservation products
$4M18 mo ago—2020Michael Stebbins
Co-Founder & CEO
—4 patents
Home water quality monitoring and high‑sensitivity, non‑obstructive flow sensing devices
—
35Aqueduct Software
Software solution for water and wastewater management
$4M6 mo ago—2022Aaron Rosenberg
Co-Founder
———
36Molecule Works
Provider of water treatment solutions
$4M22 mo ago—2015Wei Liu
CEO
———
37Hydrosome Labs
Platform using technology that enhances the bioavailability of water
$4M19 mo ago—2021Paul Gadbut
President and CEO
WordPressMySQLPHP+2016 patents
Ultrafine bubble delivery systems for beverages, cosmetics, pharma, and agricultural applications
1 partnership
38Nirova
Developer of monitoring systems for anaerobic digester biological process stability
$3M2 mo ago—2022Will Charlton
Founder & CTO
——1 launch · 1 expansion
39MFNS Tech
Developer of nanocoating solutions for cleaning water
$2M10 mo ago32019Vikas Nandwana
Co-Founder & CTO
——1 launch
40Active 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
$2M12 mo ago—2022Eric Hoek
Co-Founder
———
41WaHa
Developer of atmospheric water generation and energy-efficient air conditioning technology
$2M11 mo ago52018David Kuo
Founder and Executive Vice President
WordPress Block EditorElementorWordPress+22—2 launchs · 1 partnership
42Loggerhead
Manufacturer of underwater passive acoustic dataloggers.
$2M15 mo ago32004—Cart FunctionalitySquarespace CommerceSquarespace+15——
43Kara Water
Manufacturer of air-to-water devices producing mineral-rich alkaline water and coffee
$2M12 mo ago92017Bill I
Co-Founder
Cart FunctionalityShopifyTailwind CSS+32——
44Kairos
Provider of solutions for water leak detection and control system
$2M6 mo ago272017Dean Fung-A-Wing
Co-Founder & CEO
—5 patents
Additive manufacturing defect detection and on‑demand 3D part generation for repair
—
45Voda
AI-enabled software solution for pipe breakage prediction
$1M12 mo ago252017Jim Fitchett
Chief Operating Officer & Co-Founder
WordPress Block EditorWordPressMySQL+329 patents
Patents concentrated in computing, sensing & instrumentation
2 launchs
46Next TFX
Developer of ultra-high-pressure reverse osmosis membranes for water and mineral recovery
$1M3 mo ago—2025Eric Hoek
Co-Founder & CEO
———
47Thrive Smart Systems
Provider of smart watering solutions for home gardeners
$1M14 mo ago32018Bryan Brittain
Co-Founder
WordPressMySQLPHP+22——
48NALA
Developer of chlorine-resistant reverse osmosis membranes
$700K4 mo ago182018Sue Mecham
Co-Founder & CEO
Cart FunctionalityWixSentry+14—1 award
49OXbyEL Technologies
Technology solution for water treatment
$375K9 mo ago52018Preston Montalvo
Co-Founder
———
50FarmHQ
Smart irrigation control system
$325K10 mo ago82020—WordPressMySQLPHP+33——

Top 12 Water and Wastewater Management Tech companies in United States

#1
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.

Fliar Intelligence Index™ 78how this company ranks against its industry peers
Patents
top 21%
Moat
top 22%
Funding
top 26%
Innovation
top 29%
Global
top 30%
Market
top 33%
Patents: 256 patents matched (strict assignee match) · 103 filings since 2022 vs 108 in 2017-21 · Latest publication 2026
Moat: Editorial + unicorn rating 9/10 · IP moat: 256 patents · Unicorn
Funding: Raised $400M across 3 rounds · 3 rounds over 11 yrs (0.3/yr) · Last round Series E (May 2026)
Audience (LinkedIn): 83k LinkedIn followers — 29.2% of this cohort's audience
Funding rounds
  • May 2026Series E—
  • Oct 2025Conventional Debt$50M
  • May 2023Series D$225M
  • Jun 2021Series C$104.8M
Founders & team
Anurag BajpayeeCo-Founder & CEO
Investors
Warburg Pincus, SLB, Cranberry Capital, Centaurus Capital, BoltRock Holdings, HSBC
Tech stack
AlgoliaApache Http ServerApple Icloud MailBootstrapCloudflareCloudflare Bot Management
#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.

Fliar Intelligence Index™ 76how this company ranks against its industry peers
Growth
top 13%
Funding
top 24%
Patents
top 41%
Market
top 43%
Moat
top 45%
Innovation
top 46%
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) · Last round Series D (Dec 2025)
Patents: 95 patents matched (strict assignee match) · 6 filings since 2022 vs 48 in 2017-21 · Latest publication 2023
Funding rounds
  • Dec 2025Series D—
  • Apr 2012Conventional Debt$20.5M
  • Apr 2012Series C$40M
  • Dec 2011Series C$14.9M
Investors
Khosla Ventures, Total, CalPERS, Pacific Corporate Group, Oak Investment Partners, BASF
#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.

Fliar Intelligence Index™ 53how this company ranks against its industry peers
Funding
top 34%
Growth
top 35%
Talent
top 38%
Moat
top 39%
Product
top 46%
Tech
top 49%
Funding: Raised $19.2M across 5 rounds · 5 rounds over 8 yrs (0.6/yr) · Last round Conventional Debt (Jan 2026)
Growth: Fresh capital in last 24 mo
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Audience (LinkedIn): 4k LinkedIn followers
Hiring (LinkedIn): 1 hiring post in 12 mo (public) · hiring: Mid-Market Account Executive
Funding rounds
  • Jan 2026Conventional Debt$7.5M
  • Dec 2025Series B$10.1M
  • Nov 2021Series A$16M
  • Oct 2020Series A$3.1M
Founders & team
Elaine KellyCo-FounderDavid LynchCEO
Investors
Spider Capital, Bowery Capital, SaaS Ventures, Insight Partners, Y Combinator, Canadian Imperial Bank of Commerce
Tech stack
CloudflareCloudflare Bot ManagementCore-JsFacebook PixelGoogle AnalyticsGoogle Font Api
#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.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 4k LinkedIn followers
Hiring: 1 hiring post in 12 mo (public) · hiring: Head of Wastewater Process & Technology, Climate & Water Initiatives Lead
Funding rounds
  • May 2026Grant (prize money)$6M
  • May 2026Series A$19M
  • Oct 2024Seed$5.3M
Founders & team
Joachim KatchinoffCo-Founder & CEO
Investors
Counteract, ReGen Ventures, Animo, Connecticut Innovations, Ponderosa Ventures, Newlab
#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.

Funding rounds
  • Feb 2025Series D$19.3M
  • Jul 2022Series D$130M
  • Apr 2022Series D$108.9M
  • Jun 2020Series C$50M
Founders & team
Shikha KapurCo-Founder
Investors
Breakthrough Energy, Drawdown Fund, Microsoft, Fifth Wall, BlackRock, WIND Ventures
Tech stack
Apple PayCart FunctionalityCloudflareCloudflare Bot ManagementCore-JsElementor
#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.

Fliar Intelligence Index™ 32how this company ranks against its industry peers
Funding
top 26%
Talent
top 38%
Moat
top 39%
Tech
bottom 43%
News
bottom 42%
Global
bottom 36%
Funding: Raised $47.7M across 8 rounds · 8 rounds over 5 yrs (1.6/yr) · Last round Series B (Aug 2025)
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Moat: Editorial + unicorn rating 7/10 · 9 curated direct competitors tracked
Audience (LinkedIn): 3k LinkedIn followers
Activity (LinkedIn): 2 awards announced in 12 mo
Funding rounds
  • Aug 2025Series B$10M
  • Sep 2024Series B$700K
  • May 2024Series B$22M
  • Dec 2023Series B$18.2M
Founders & team
Michelle BellancaCo-Founder & CEOAbdennour AbbasCo-Founder & CTO
Investors
3x5 Partners, Discovery Capital, TechFounders, Ecosystem Integrity Fund, American Century Investments, United States Department of Agriculture
#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.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 6k LinkedIn followers — 2.2% of this cohort's audience
Activity: 1 product launches announced in 12 mo
Funding rounds
  • Aug 2025Conventional Debt—
  • Aug 2025Series C—
  • Jun 2022Series C$48.2M
  • Nov 2021Conventional Debt—
Investors
Riverstone Holdings, KA Fund Advisors, Kayne Anderson, eldon pass, Select Milk, Proterra Investment Partners
Tech stack
Apple Icloud MailBootstrapCloudflareCloudflare Bot ManagementCore-JsGoogle Analytics
#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.

Fliar Intelligence Index™ 16how this company ranks against its industry peers
Funding
top 34%
Talent
top 38%
Global
bottom 29%
Market
bottom 20%
Funding: Raised $6.7M across 2 rounds · 2 rounds over 4 yrs (0.5/yr) · Last round Seed (Feb 2026)
Talent: 2 named leaders on record · 2 C-suite/founder profiles curated
Global: Single-market focus (United States)
Audience (LinkedIn): 2k LinkedIn followers
Activity (LinkedIn): 1 awards announced in 12 mo
Funding rounds
  • Feb 2026Seed$4M
  • Jul 2025Seed$2.7M
  • Aug 2022Seed—
Founders & team
Nathaniel BanksCo-FounderYidian LiuCo-Founder
Investors
Njeda, Fyrfly Venture Partners, Tech Council Ventures, Interstate Fusion Ventures, Golden Seeds, New Jersey Innovation Evergreen Fund
#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.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 8k LinkedIn followers — 2.8% of this cohort's audience
Activity: 1 partnerships (incl. Cambrian) announced in 12 mo
Funding rounds
  • Jun 2025Conventional Debt$150M
  • Nov 2023Series C$200M
  • Feb 2022Series B$2.2M
  • Oct 2019Series B$18M
Founders & team
Matthew SilverCo-Founder & CEO
Investors
Spring Lane Capital, National Science Foundation, ING, Pennybacker Capital, United States Department of Agriculture, Windsail Capital Group
Tech stack
CloudflareCloudflare Bot ManagementCookiebotCore-JsDreamhostGoogle Analytics
#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.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 842 LinkedIn followers
Activity: 1 product launches · 1 expansions announced in 12 mo
Funding rounds
  • Apr 2026Seed$3M
Founders & team
Will CharltonFounder & CTOSandy SelmanCEO
#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.

LinkedIn Pulse recent public activity · Jul 2026
Audience: 7k LinkedIn followers — 2.5% of this cohort's audience
Funding rounds
  • Jun 2025Series B$20M
  • Feb 2025Series B$1M
  • Nov 2024Series B$1.9M
  • Aug 2023Series B$12.5M
Founders & team
Greg NewbloomPresident & CEO
Investors
PureTerra Ventures, Safar Partners, GiantLeap, freeflow, Bellingham Angel Investors, SeaChange Fund
Tech stack
WordpressMysqlPhpWpmu Dev SmushYoast SeoNginx
#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.

Funding rounds
  • Dec 2025Series B$21.9M
  • Apr 2024Series A$4.5M
Founders & team
Aaron RosenbergCo-FounderNeel PatelCo-Founder & CEO

Funding & investor landscape

$4.2Btotal disclosed funding
246companies funded
766disclosed rounds
3rounds last 90 days
Most active investors
Imagine H2O41 rounds
National Science Foundation29 rounds
Techstars17 rounds
MassChallenge14 rounds
OSTI13 rounds
Plug and Play Tech Center13 rounds
America’s Seed Fund10 rounds
Echo River Capital10 rounds
Mazarine Ventures8 rounds
Village Capital8 rounds

Notable founders

Anurag Bajpayee
Co-Founder & CEO · Gradiant
Elaine Kelly
Co-Founder · Klir
David Lynch
CEO · Klir
Joachim Katchinoff
Co-Founder & CEO · Crew Carbon
Shikha Kapur
Co-Founder · SOURCE
Michelle Bellanca
Co-Founder & CEO · Claros Technologies
Abdennour Abbas
Co-Founder & CTO · Claros Technologies
Nathaniel Banks
Co-Founder · PolyGone
Yidian Liu
Co-Founder · PolyGone
Matthew Silver
Co-Founder & CEO · Cambrian Innovation
Will Charlton
Founder & CTO · Nirova
Sandy Selman
CEO · Nirova
Prism market signals · United States · country-scoped Prism corpus, 21,712,099 docs

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

RESEARCH SIGNALS · United States

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.

research sentiment over time
200820172026
enthusiastic · positive · guarded tone
Tone is overwhelmingly optimistic and intensifying — the enthusiastic (strongly-positive) share moved 28% → 47% across 2008–2026.
top research entities
  • University of North Carolina at Chapel Hill127
  • Environmental Protection Agency100
  • Arizona State University67
  • Stanford University66
  • Purdue University West Lafayette60
leading researchers
Paul Westerhoff · Mark D. Sobsey · William A. Mitch · Craig Patterson · James A. Smith · R. Scott Summers · Rajib Sinha · David L. Sedlak
▲ Breakthroughs517 · 15%
▲ 11%→20% share
▲1.8× share momentum1 median citations64% since 2021mostly methods-led
Photocatalysis research is surging — papers nearly tripled (3→26), signaling rapid emergence as a core treatment breakthrough.
rising sub-themes (early→recent)
  • Adsorption12→68
  • Membrane13→53
  • Photocatalysis3→26
  • Degradation (telecommunications)1→23
  • Wastewater9→30
Newly emergingSorption 0→9 · Human health 0→8 · Evaporation 0→6
Landmark Simultaneous nanocatalytic surface activation of pollutants and oxidants for highly efficient water decontamination · 481 cites
◆ Advancements1,691 · 50%
▼ 52%→48% share
▼0.9× share momentum2 median citations46% since 2021mostly empirical
Wastewater advancements are intensifying — U.S. papers more than doubled (60→128) alongside sewage treatment rising 30→75.
rising sub-themes (early→recent)
  • Adsorption51→158
  • Wastewater60→128
  • Sewage treatment30→75
  • Water quality62→96
  • Degradation (telecommunications)11→40
Newly emergingFourier transform infrared spectroscopy 0→10 · Resource recovery 0→9 · Cyanobacteria 0→6
Landmark Advanced Oxidation Processes (AOPs) in Wastewater Treatment · 1,809 cites
▼ Concerns769 · 23%
▼ 24%→22% share
▼0.9× share momentum3 median citations46% since 2021mostly empirical
Microplastics concern is newly emerging in U.S. water-quality research, appearing alongside sewage treatment papers tripling (8→35).
rising sub-themes (early→recent)
  • Water quality51→93
  • Sewage treatment8→35
  • Wastewater19→43
  • Water supply17→30
  • Reverse osmosis11→23
Newly emergingMicroplastics 0→8 · Degradation (telecommunications) 0→7 · Diarrheal disease 0→6
Landmark Challenges and Opportunities for Electrochemical Processes as Next-Generation Technologies for the Treatment of Contamin · 1,075 cites
RESEARCH HOTSPOTS · United States

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.

SF Bay Area142 · +0.31
Hot · ChlorineAdvancing · WetlandOpportunity · Mortality rateConcern · Diarrheal disease
Boston95 · +0.33
Hot · ElectrodialysisAdvancing · Brackish waterOpportunity · Clean waterConcern · Environmental planning
Atlanta68 · +0.36
Hot · Natural organic matterAdvancing · Pulp and paper industryOpportunity · Aqueous solutionConcern · Environmental health
Pittsburgh50 · +0.22
Hot · BromideAdvancing · Produced waterOpportunity · AdsorptionConcern · Trihalomethane
New York46 · +0.40
Hot · ArsenicAdvancing · Filter (signal processing)Opportunity · GroundwaterConcern · Contamination
Los Angeles38 · +0.52
Hot · MembraneAdvancing · AnodeOpportunity · Electrochemistry
Ann Arbor37 · +0.39
Hot · BacteriaAdvancing · PhotocatalysisOpportunity · Aqueous solutionConcern · Environmental engineering
Austin34 · +0.41
Hot · PolymerAdvancing · Portable water purificationOpportunity · MoringaConcern · Nanotechnology
Philadelphia28 · +0.32
Hot · Mortality rateAdvancing · Environmental engineeringOpportunity · Water disinfectionConcern · Diarrheal disease
Chicago21 · +0.29
Hot · ElectrochemistryAdvancing · Surface waterOpportunity · Sewage treatmentConcern · Biochemical engineering
PATENT SIGNAL · United States

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.

3,379 filings2,991 assigneespeak 401/yr2016–2025
filing momentum (YoY 2016–2025)
top patent filers
  • Siemens278
  • General Electric185
  • Access Business Group INT152
  • Ecolab USA132
  • Evoqua Water TECH116
  • D C Water & Sewer Authority81
  • Hampton Roads Sanitation Distr77
  • 3M Innovative Properties69

Common questions

How many Water and Wastewater Management Tech companies are there in United States?
Radar tracks 707 indexable Water and Wastewater Management Tech companies headquartered in United States that meet our profile-completeness bar.
What is the total funding raised by Water and Wastewater Management Tech companies in United States?
The Water and Wastewater Management Tech companies in United States on this list have raised a combined $4.2B in disclosed equity funding across 246 funded companies.
Which is the highest-funded Water and Wastewater Management Tech company in United States?
Solugen is the highest-funded Water and Wastewater Management Tech company in United States, with $636.9M in disclosed equity funding.
How many Water and Wastewater Management Tech companies in United States are funded?
246 of the 707 Water and Wastewater Management Tech companies in United States on this list have disclosed at least one equity funding round.
How many Water and Wastewater Management Tech unicorns are there in United States?
2 Water and Wastewater Management Tech companies in United States on this list are valued at $1B or more.
Who are the top investors in United States Water and Wastewater Management Tech companies?
The most active investors in United States Water and Wastewater Management Tech companies on this list include Imagine H2O, National Science Foundation, Techstars, MassChallenge, OSTI.
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