Best Environment Companies in CA, United States
The 54 best Environment companies in CA, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals.
Our analysis of 90 Environment companies
$38.2b in tracked funding; 89% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Environment companies in CA
| # | Company | Disclosed funding | Employees | Tech stack | Web popularity | SEO maturity | Founded | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | ENGIE Cofely efficacité énergétique des bâtiments, énergies locales et renouvelables, transition énergétique… | — | 268 | — | — | — | — | — | — |
| 2 | Hydranautics - A Nitto Group Company Water is our Earth's most precious resource, yet more than 99 percent of our water is unavailable for life… | — | 243 | WordPressMySQLPHP+20 | Top 5M | rich | 1963 | — | — |
| 3 | City of Turlock City of Turlock is a renewables & environment company based out of 156 S Broadway, Turlock, CA, United States. | — | 227 | Windows ServerMicrosoft ASP.NETIIS+3 | Top 10M | basic | — | — | — |
| 4 | LA Sanitation and Environment As the lead agency for the City of Los Angeles' environmental programs and initiatives, LA Sanitation… | — | 169 | — | — | — | — | — | 1 job opening · 1 launch |
| 5 | Union Sanitary District Union Sanitary District operates a 33-acre wastewater treatment facility in Union City and provides… | — | 155 | — | — | — | — | — | — |
| 6 | Newell Recycling of Georgia Newell Recycling, LLC is proud to be one of the nation's premier processors of ferrous and non-ferrous scrap… | — | 148 | — | — | — | — | — | — |
| 7 | San Francisco Department of the Environment Our Home. | — | 125 | DrupalMariaDBPHP+19 | Top 5M | basic | — | — | — |
| 8 | RAM Associates RAM Associates is a wind energy meteorological consulting company with 31 years of experience in the industry. | — | 93 | — | — | — | 1985 | — | — |
Funding & investor landscape
Market landscape — 10 sub-themes by coverage
Share of Environment coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Environmental Monitoring in CA is moving
A read on the academic research around Environmental Monitoring in CA — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 4,399 papers.
Chinese Academy of Sciences, USGS, and Cary Institute lead California's environmental-monitoring research, focusing on air/water quality and toxic pollutants, with a cautiously optimistic yet contested tone.
- Chinese Academy of Sciences190
- United States Geological Survey157
- Cary Institute of Ecosystem Studies112
- Environment and Climate Change Canada78
- University of Chinese Academy of Sciences63
- Air quality index4→49
- Pollution5→47
- Water quality9→47
- Software deployment4→37
- Scalability2→33
- Air pollution10→83
- Air quality index16→88
- Pollution14→83
- Water quality27→90
- Pollutant11→58
- Pollution11→102
- Human health2→71
- Water quality19→71
- Pollutant14→64
- Contamination10→56