14 Best Wastewater Treatment Startups to Watch in 2025

The Definitive Seedtable Ranking of Wastewater Treatment Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 14 start-ups with an aggregate funding of $579.8m. The average funding per company in this subset is $41.4m.

Last update to the database: Feb 18, 2025. See changelog.

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Solugen logo

Solugen

Solugen is a speciality chemical manufacturing company developing aiming to replace petroleum-based chemicals with alternatives made from plant-based substitutes.

9

Funding Rounds

$474.1m

Money raised

Crystal IS logo

Crystal IS

Crystal IS manufactures high-performance deep UV (UVC) LEDs for water and surface disinfection, monitoring, and sterilization applications in a variety of industries.

5

Funding Rounds

$26.7m

Money raised

Hydroleap logo

Hydroleap

Company manufacturing an economical industrial wastewater management system

1

Funding Rounds

$1.9m

Money raised

Ceres (organization) logo

Ceres (organization)

Ceres is a non-profit organization advocating sustainability founded in 1989 by Joan Bavaria.

1

Funding Rounds

Aquacycl logo

Aquacycl

Aquacycl is a company that provides bioelectrochemical technologies to provide sanitation and water.

6

Funding Rounds

$15.1m

Money raised

SaltWorks, Inc. logo

SaltWorks, Inc.

SaltWorks, Inc. is a Woodinville, Washington-based wastewater treatment company developing industrial desalination, brine treatment, and zero liquid discharge technology.

9

Funding Rounds

$8.0m

Money raised

Onvector LLC logo

Onvector LLC

Plasma Vortex technology to address costly water treatment in industrial and waste settings.

1

Funding Rounds

$280.0k

Money raised

Anaergia logo

Anaergia

Anaergia is a Toronto-based developer of sustainable solutions for the generation of renewable energy and the conversion of waste to resources.

1

Funding Rounds

$46.3m

Money raised

Fibracast logo

Fibracast

Fibracast is a Hannon, Ontario-based wastewater treatment company developing a hybrid ultrafilter.

1

Funding Rounds

$1.9m

Money raised

Leviathan dynamics logo

Leviathan dynamics

Leviathan dynamics is a Paris-based company.

1

Funding Rounds

$83.8k

Money raised

Bluemater logo

Bluemater

Bluemater is a Porto-based environmental company developing biological treatment solutions for wastewater treatment.

1

Funding Rounds

$2.3m

Money raised

Roserve logo

Roserve

Roserve is a Mumbai-based wastewater recycling and treatment company.

1

Funding Rounds

$1.6m

Money raised

1

Funding Rounds

S&N Airoflo (company) logo

S&N Airoflo (company)

S&N Airoflo is a wastewater treatment company.

1

Funding Rounds

$1.6m

Money raised