3672 indexable Waste & Water Management companies headquartered in United States, ranked by total equity funding and recent funding momentum. Combined disclosed equity funding of $17.5B across 435 funded companies.
| # | Company | Funding | Valuation | Stage | Latest round | Employees | Founded | Momentum |
|---|---|---|---|---|---|---|---|---|
| 1 |
Sylmar Group
Provider of industrial water treatment services |
$130M | — | Funding Raised | Conventional Debt Feb 2026 | 6 | 2019 | ↑ Active |
| 2 | Claros | $39.8M | — | Seed | Seed Mar 2026 | — | 2024 | ↑ Active |
| 3 |
PureCycle
Provider of waste plastic recycling services |
$722.3M | — | Public | Post IPO Feb 2025 | 177 | 2015 | ↑ Active |
| 4 |
City of Rapid City
Provider of water management services |
$74.7M | — | Funding Raised | Grant (prize money) Aug 2025 | 302 | 2001 | ↑ Active |
| 5 |
PolyGone
Artificial root filter technology to remove microplastics from waterways |
$6.7M | — | Seed | Seed Feb 2026 | 7 | 2021 | ↑ Active |
| 6 |
DC Water
Provider of water management services |
$157.1M | — | Funding Raised | Grant (prize money) Jan 2025 | 1,113 | 1996 | ↑ Active |
| 7 |
Global Water
Water resource management providing water, wastewater, and recycled water utility services |
$19.9M | — | Public | Post IPO Sep 2025 | 100 | 2003 | ↑ Active |
| 8 | Central States Water Resources | $325M | — | Funding Raised | Conventional Debt Dec 2024 | 91 | 2013 | ↑ Active |
| 9 |
Deep Isolation
Provider of nuclear waste storage and disposal services |
$26.1M | — | Series B | Series B Jul 2025 | 19 | 2016 | ↑ Active |
| 10 |
BioLargo
Provider of wastewater treatment services |
$11.8M | — | Public | Post IPO Sep 2025 | 23 | 1989 | ↑ Active |
| 11 |
Woodwell Climate
Conducts climate science research and develops solutions |
$37.3M | — | Funding Raised | Grant (prize money) May 2025 | 133 | 1985 | ↑ Active |
| 12 |
Pecan Street
Provider of solar educational, training, and water management services |
$43.1M | — | Funding Raised | Grant (prize money) May 2025 | 44 | 2010 | ↑ Active |
| 13 |
KMX Technologies
Provider of water treatment services |
$7M | — | Series A | Series A Oct 2025 | 18 | 2020 | ↑ Active |
| 14 |
ReElement Technologies
Provider of metal recovery solutions for rare earth elements and critical battery metals |
$3.1M | — | Series B | Series B Jan 2026 | — | 2016 | ↑ Active |
| 15 |
Boulder Industries
Provider of conversion solution of waste tires into energy products |
$80.2M | — | Series B | Series B Feb 2025 | 72 | 2010 | ↑ Active |
| 16 |
Gross-Wen Technologies
Provider of municipal and industrial wastewater treatment services |
$18.8M | — | Series B | Series B Jun 2025 | 12 | 2014 | ↑ Active |
| 17 |
Bold Reuse
Provider of carbon footprint and waste reduction services |
$1.6M | — | Seed | Seed Feb 2026 | 15 | 2011 | ↑ Active |
| 18 |
Aquaria
Provider of water management services |
$112M | — | Series D | Series D Nov 2024 | 9 | 2022 | ↑ Active |
| 19 |
Spot My Energy
Provider of home energy management system for energy management |
$1.7M | — | Seed | Seed Jan 2026 | — | 2019 | ↑ Active |
| 20 |
Mycocycle
Provider of solid waste recycling services |
$7.5M | — | Seed | Seed Aug 2025 | 12 | 2018 | ↑ Active |
| 21 |
r.World
Provider of waste recycling services |
$10.4M | — | Series A | Series A Jul 2025 | 24 | 2017 | ↑ Active |
| 22 |
Made From Stone
Provider of water management services |
$3M | — | Seed | Seed Sep 2025 | 73 | 2019 | ↑ Active |
| 23 |
Comstock
Provider of waste management and commercial decarbonization solutions |
$5.9M | — | Public | Post IPO Jun 2025 | 36 | 2003 | ↑ Active |
| 24 |
ERI
Provider of E-waste recycling and asset disposition services |
$9.6M | — | Funding Raised | Grant (prize money) May 2025 | 452 | 2003 | ↑ Active |
| 25 |
HydroEdge Solutions
Provider of water transfer and fluid management services for the energy industry |
$10.5M | — | Funding Raised | Conventional Debt Apr 2025 | 48 | 2012 | ↑ Active |
| 26 |
Sourgum Waste
Provider of waste recycling services |
$12.5M | — | Series A | Series A Apr 2025 | 15 | 2019 | ↑ Active |
| 27 |
Carollo Engineers
Provider of wastewater management services |
$2.3M | — | Funding Raised | Grant (prize money) Oct 2025 | 1,209 | 1994 | ↑ Active |
| 28 |
Waterly
Provider of affordable water data management software |
$4M | — | Series A | Series A Aug 2025 | 7 | 2017 | ↑ Active |
| 29 | CSU | $10.3M | — | Funding Raised | Grant (prize money) Apr 2025 | — | 1922 | ↑ Active |
| 30 |
Hauler Hero
Provider of waste recycling services |
$1.1M | — | Series A | Series A Nov 2025 | 15 | 2020 | ↑ Active |
| 31 |
Mote
Provider of wood waste recycling services |
$14.4M | — | Series A | Series A Feb 2025 | 10 | 2017 | ↑ Active |
| 32 |
Cambium Carbon
Provider of carbon waste management services |
$8.5M | — | Series A | Series A Feb 2025 | 21 | 2019 | ↑ Active |
| 33 |
Natural Ocean Well
Provider of water management services |
$16.5M | — | Series A | Series A Nov 2024 | 8 | 2019 | ↑ Active |
| 34 |
Greenbutts
Provider of plastic recycling services |
$303.9K | — | Seed | Seed Jan 2026 | 8 | 2010 | ↑ Active |
| 35 |
Plattsmouth
Provider of municipal services and community development |
$5.2M | — | Funding Raised | Grant (prize money) Mar 2025 | — | 2001 | ↑ Active |
| 36 |
T2M Global
Provider of services to convert waste to energy |
$4.3M | — | Funding Raised | Grant (prize money) May 2025 | — | 2017 | ↑ Active |
| 37 |
Bnwaterkeeper
Provider of freshwater ecosystem restoration and advocacy services |
$4.8M | — | Funding Raised | Grant (prize money) Feb 2025 | 39 | 1989 | ↑ Active |
| 38 |
Greensteelenvironmental
Retailer of gourmet food products, beverages, and related kitchenware items |
$1.7M | — | Seed | Seed Aug 2025 | — | — | ↑ Active |
| 39 |
Resynergi
Offers system for plastic to oil conversion |
$6.4M | — | Series B | Series B Jan 2025 | 11 | 2009 | ↑ Active |
| 40 |
Active Membranes
Developer of electro-active membrane technology for desalination and water treatment |
$2.3M | — | Seed | Seed Jun 2025 | — | 2022 | ↑ Active |
| 41 |
OndaVia
Provider of chemical testing services |
$1M | — | Seed | Grant (prize money) Jul 2025 | 8 | 2009 | ↑ Active |
| 42 | WATTER | $5M | — | Seed | Seed Mar 2025 | — | 2023 | ↑ Active |
| 43 |
Corewater Technologies
Provider of water treatment solutions |
$6.2M | — | Series A | Series A Jan 2025 | — | 2019 | ↑ Active |
| 44 |
Pretred
Provider of tires and plastics recycling services |
$7.6M | — | Series B | Series B Nov 2024 | 10 | 2019 | ↑ Active |
| 45 |
Fulcrum Bioenergy
Provider of ethanol production solution from municipal solid waste |
$347.9M | — | Series F | Grant (prize money) Feb 2023 | 129 | 2007 | — |
| 46 |
Intermix Performance Materials
Developer of recycled plastics using patented additive technology |
$2.7M | — | Funding Raised | Grant (prize money) Apr 2025 | 4 | 2021 | ↑ Active |
| 47 |
Ravelfuture
Provider of textile recycling solutions for blended materials |
$3.3M | — | Seed | Seed Mar 2025 | 5 | 2019 | ↑ Active |
| 48 |
Cloud Water Filters
Provider of water filter services |
$4.8M | — | Seed | Seed Jan 2025 | 6 | 2019 | ↑ Active |
| 49 |
Quasar Energy Group
Anaerobic digestion systems innovator for biomass management and nutrient services |
$2.4M | — | Funding Raised | Grant (prize money) May 2025 | 50 | 2006 | ↑ Active |
| 50 |
Goodnight Midstream
Provider of integrated saltwater management services |
$580M | — | Acquired | Conventional Debt Jul 2022 | 142 | 2011 | — |
Provider of industrial water treatment services
Provider of waste plastic recycling services
Rapid City is located in the Black Hills of South Dakota and gets its name from Rapid Creek which flows through the City Greenway. Known as the Star of the West and the City of Presidents it is the county seat of Pennington County and the second largest City in South Dakota with a thriving community of nearly 70,000. \r\n\r\nRapid City has more than 743 full time City employees.
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.
Provider of water management services
Water resource management providing water, wastewater, and recycled water utility services. The company focuses on total water management, integrating water, wastewater, and recycled water systems to maximize water reuse. This approach employs smart water management programs, advanced metering infrastructure, and other technologies to promote conservation. The company aims to protect water supplies in water-scarce ar
Provider of nuclear waste storage and disposal services
Provider of wastewater treatment services
Conducts climate science research and develops solutions. This research focuses on the intersection of climate, people, and nature, aiming to inform policy and decision-making. The organization partners with communities and leaders globally to create impactful solutions for climate change. Their work utilizes various methods including field and laboratory science, remote sensing, and computer modeling. Collaboration
Provider of solar educational, training, and water management services
Rankings are computed by Radar (Fliar BI) from the Radar company master and are updated periodically. Funding and momentum scores use disclosed equity-funding data only. Figures may lag private rounds. Last updated 2026-06-16.
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