# Top 34 Wastewater Treatment Startups Worldwide by Funding (2026)

> The 34 best-funded wastewater treatment startups worldwide, ranked by total funding raised: $288M combined.

Source: https://millionrounds.com/top-lists/wastewater-treatment-startups (Millionrounds; every figure on the page links to its filing or article)

- 1 [**ZwitterCo** ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University.](https://millionrounds.com/company/zwitterco) ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University. *Founded* 2018 Woburn, United States **$58M** last round Oct 2026
- 2 [**Gradiant** Gradiant is a Boston-based water treatment technology company founded in 2013 as a spinout from MIT.](https://millionrounds.com/company/gradiant) Gradiant is a Boston-based water treatment technology company founded in 2013 as a spinout from MIT. *Founded* 2013 Woburn, United States **$50M** last round May 2026
- 3 [**Bluewater Bio** The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.](https://millionrounds.com/company/bluewater-bio) The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater. *Founded* 2007 London, United Kingdom **$38M** last round Dec 2021
- 4 [**CREW Carbon** CREW Carbon is a climate technology company founded in 2022 and based in Hamden, Connecticut.](https://millionrounds.com/company/crew-carbon) CREW Carbon is a climate technology company founded in 2022 and based in Hamden, Connecticut. *Founded* - Hamden, United States **$30M** last round May 2026
- 5 [**Axine Water Technologies** Axine Water Technologies is a leader in electrochemical oxidation technology for industrial wastewater treatment, focusing on the effective destruction of persi](https://millionrounds.com/company/axine-water-technologies) Axine Water Technologies is a leader in electrochemical oxidation technology for industrial wastewater treatment, focusing on the effective destruction of persi *Founded* 2010 Vancouver, Canada **$21M** last round Nov 2024
- 6 [**Arvia Technology** Arvia Technology is a UK-based company founded in 2007, specializing in industrial wastewater treatment.](https://millionrounds.com/company/arvia-technology) Arvia Technology is a UK-based company founded in 2007, specializing in industrial wastewater treatment. *Founded* 2007 Runcorn, United Kingdom **$16M** last round Apr 2015
- 7 [**AnAerobics** AnAerobics, a Rochester, N.Y.-based developer of anaerobic wastewater treatment systems.](https://millionrounds.com/company/anaerobics) AnAerobics, a Rochester, N.Y.-based developer of anaerobic wastewater treatment systems. *Founded* 1999 United States **$15M** last round Oct 2002
- 8 [**PolyCera Membranes** PolyCera Membranes develops membrane technology for industrial wastewater treatment.](https://millionrounds.com/company/polycera-membranes) PolyCera Membranes develops membrane technology for industrial wastewater treatment. *Founded* 2017 Inglewood, United States **$9.0M** last round Jun 2018
- 9 [**cimico** Cimico is a biotechnology startup based in San Sebastián, Spain, founded in 2019.](https://millionrounds.com/company/cimico) Cimico is a biotechnology startup based in San Sebastián, Spain, founded in 2019. *Founded* 2021 San Sebastian, Spain **$7.9M** last round Jul 2023
- 10 [**Shanghai Keysino Separation Technology** Keysino – To Be The Most Professional Technology And Service Company For Industrial Fluid Treatment And Wastewater Reuse.](https://millionrounds.com/company/shanghai-keysino-separation-technology) Keysino – To Be The Most Professional Technology And Service Company For Industrial Fluid Treatment And Wastewater Reuse. *Founded* 2011 China **$7.9M** last round Nov 2015
- 11 [**HydroLeap** Hydroleap Pte.](https://millionrounds.com/company/hydroleap) Hydroleap Pte. *Founded* 2016 Singapore, Singapore **$6.7M** last round Jul 2025
- 12 [**Eco World Water** Eco World Water is a clean water tech company that offers wastewater processing through physical and chemical treatment process.](https://millionrounds.com/company/eco-world-water) Eco World Water is a clean water tech company that offers wastewater processing through physical and chemical treatment process. *Founded* - Fort Lauderdale, United States **$5.9M** last round Apr 2026
- 13 [**PowerTech Water** PowerTech Water is a wastewater solution company that offers a chemical-free water treatment platform.](https://millionrounds.com/company/powertech-water) PowerTech Water is a wastewater solution company that offers a chemical-free water treatment platform. *Founded* 2014 Lexington, United States **$2.8M** last round Jun 2023
- 14 [**Micromidas** Micromidas provides microbial biorefinery technology for wastewater treatment.](https://millionrounds.com/company/micromidas) Micromidas provides microbial biorefinery technology for wastewater treatment. *Founded* 2008 West Sacramento, United States **$2.2M** last round Apr 2010
- 15 [**Greywater** Greywater is a specialized technology company in water, wastewater and effluent treatment products.](https://millionrounds.com/company/greywater) Greywater is a specialized technology company in water, wastewater and effluent treatment products. *Founded* 2010 Thane, India **$2.0M** last round May 2011
- 16 [**NVP Energy** NVP Energy markets energy positive wastewater treatment technology that turns wastewater into a revenue generator.](https://millionrounds.com/company/nvp-energy) NVP Energy markets energy positive wastewater treatment technology that turns wastewater into a revenue generator. *Founded* 2011 Galway **$1.8M** last round Jan 2016
- 17 [**Green Steel Environmental** Green Steel Environmental is a wastewater treatment company located in Boulder, Colorado.](https://millionrounds.com/company/green-steel-environmental) Green Steel Environmental is a wastewater treatment company located in Boulder, Colorado. *Founded* 2023 Boulder, United States **$1.7M** last round Aug 2025
- 18 [**Waterwhelm** Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment.](https://millionrounds.com/company/waterwhelm) Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment. *Founded* 2018 Edinburgh, United Kingdom **$1.5M** last round Mar 2025
- 19 [**Heartland Water Technology** Heartland Water Technology provides proprietary wastewater treatment technology and services for oil and gas E&P operations.](https://millionrounds.com/company/heartland-water-technology) Heartland Water Technology provides proprietary wastewater treatment technology and services for oil and gas E&P operations. *Founded* 2008 Kirkwood, United States **$1.5M** last round Sept 2026
- 20 [**NPHarvest** NPHarvest is a company with expertise in organic waste management, wastewater treatment, and nutrient recovery.](https://millionrounds.com/company/npharvest) NPHarvest is a company with expertise in organic waste management, wastewater treatment, and nutrient recovery. *Founded* 2023 Espoo, Finland **$1.4M** last round Jan 2026
- 21 [**Nyad** Nyad is an AI company based in Birmingham, Alabama, founded in 2024.](https://millionrounds.com/company/nyad) Nyad is an AI company based in Birmingham, Alabama, founded in 2024. *Founded* 2024 Birmingham, United States **$1.3M** last round Mar 2026
- 22 [**Metal Morph** Metal Morph is a clean technology company based in London, UK, specializing in circular resource recovery for the water and wastewater sector.](https://millionrounds.com/company/metal-morph) Metal Morph is a clean technology company based in London, UK, specializing in circular resource recovery for the water and wastewater sector. *Founded* 2025 London, United Kingdom **$944K** last round Aug 2026
- 23 [**MicroHAOPs** MicroHAOPs develops wastewater treatment technology with the goal of providing membrane-based treatment processes.](https://millionrounds.com/company/microhaops) MicroHAOPs develops wastewater treatment technology with the goal of providing membrane-based treatment processes. *Founded* 2015 Seattle **$671K** last round Sept 2017
- 24 [**Aquagga, Inc.** Cleantech / ClimateTech company Ending PFAS 'Forever Chemical' pollution through wastewater treatment and sensing technologies.](https://millionrounds.com/company/aquagga-inc) Cleantech / ClimateTech company Ending PFAS 'Forever Chemical' pollution through wastewater treatment and sensing technologies. *Founded* 2019 Tacoma, United States **$600K** last round Aug 2025
- 25 [**Ainwater** AInwater is a private company specializing in AI-driven water management technology.](https://millionrounds.com/company/ainwater) AInwater is a private company specializing in AI-driven water management technology. *Founded* 2020 Santiago, Chile **$537K** last round Aug 2024
- 26 [**Rise Reforming** Rise Reforming is a cleantech startup based in Chicago, founded in 2024.](https://millionrounds.com/company/rise-reforming) Rise Reforming is a cleantech startup based in Chicago, founded in 2024. *Founded* 2024 Chicago, United States **$500K** last round Sept 2026
- 27 [**Island Water Technologies** IWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications.](https://millionrounds.com/company/island-water-technologies) IWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications. *Founded* 2013 Montague, Canada **$500K** last round Feb 2018
- 28 [**MICROrganic Technologies** VIVA MFC is a game-changer for wastewater treatment: a drop-in replacement for Aeration systems (both low and high-strength waste).](https://millionrounds.com/company/microrganic-technologies) VIVA MFC is a game-changer for wastewater treatment: a drop-in replacement for Aeration systems (both low and high-strength waste). *Founded* 2013 Troy, United States **$430K** last round Sept 2014
- 29 [**Clearas Water Recovery** CLEARAS Water Recovery is a provider of wastewater treatment services used to recover contaminants in wastewater.](https://millionrounds.com/company/clearas-water-recovery) CLEARAS Water Recovery is a provider of wastewater treatment services used to recover contaminants in wastewater. *Founded* 2007 United States **$400K** last round Sept 2014
- 30 [**Arbsource** Arbsource is developing wastewater treatment systems for the food & beverage industry.](https://millionrounds.com/company/arbsource) Arbsource is developing wastewater treatment systems for the food & beverage industry. *Founded* 2011 Scottsdale, United States **$300K** last round Dec 2014
- 31 [**WaiHome** WaiHome is a wastewater research and design company that offers onsite wastewater treatment technology.](https://millionrounds.com/company/waihome) WaiHome is a wastewater research and design company that offers onsite wastewater treatment technology. *Founded* 2021 Honolulu, United States **$199K** last round Jul 2025
- 32 [**Rapid Radicals Technology** Rapid Radicals Technology develops wastewater treatment technology for municipal sewerage districts to address combined sewer overflows.](https://millionrounds.com/company/rapid-radicals-technology) Rapid Radicals Technology develops wastewater treatment technology for municipal sewerage districts to address combined sewer overflows. *Founded* 2016 Milwaukee, United States **$100K** last round Jun 2022
- 33 [**HydrOxSys** Hydroxsys is a clean technology company based in Auckland, New Zealand, founded by engineers and scientists.](https://millionrounds.com/company/hydroxsys) Hydroxsys is a clean technology company based in Auckland, New Zealand, founded by engineers and scientists. *Founded* 2013 Auckland, New Zealand **$54K** last round Aug 2023
- 34 [**Forward Water Technologies** A new water treatment process to lower costs and reduce the need for wastewater disposal during oil production.](https://millionrounds.com/company/forward-water-technologies) A new water treatment process to lower costs and reduce the need for wastewater disposal during oil production. *Founded* 2012 Mississauga, Canada **$6K** last round Nov 2025

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies whose own description names this theme, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.

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## More lists worldwide

[See all](https://millionrounds.com/top-lists?r=Global)

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