Radar · Environment in Sacramento
Best Environment Companies in Sacramento, United States
The 33 best Environment companies in Sacramento, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Sierra Energy.
By Rohit KhannaTrends & Stories
33companies tracked
$56.8Mdisclosed funding
0unicorns
4have raised
FLIAR INTELLIGENCE · ENVIRONMENT × SACRAMENTO
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.
90companies analysed
89%cloud-native stacks
2025funding peak (by rounds)
3unicorns
2015median founding year
Ranked: Best Environment companies in Sacramento
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Sierra Energy Provider of waste-to-energy solution | $33M | 87 mo ago | Series A | Mike Hart Founder & CEO | 2004 | WordPressMySQLPHP+25 | — | — |
| 2 | APTwater Provider of water treatment and testing services | $24M | 160 mo ago | Acquired | — | 1996 | — | 22 patents Advanced membrane biofilm reactors and pulsating flow manifolds for wastewater treatment. | — |
| 3 | Kepler Energy Systems Provider of global renewable energy solutions | $150K | 53 mo ago | Funding Raised | Greg Treseder Chief Executive Officer | 2019 | — | — | — |
| 4 | CalRecycle Provider of waste recycling services | $103K | 217 mo ago | Funding Raised | — | 1989 | — | — | — |
| 5 | A1 Solar Solutions Solar solutions provider offering sustainable energy for a brighter future | — | — | Acquired | Eric Klinger CEO & President | 2016 | — | 175 patents Patents concentrated in chemistry & materials | — |
| 6 | ACWA Advocate for sustainable water solutions in a specific region. | — | — | Funding Raised | — | 1910 | WordPressBugHerdMySQL+22 | — | — |
| 7 | Air Filter Supply Provider of air filtration systems and services. This company offers a variety of filters, including… | — | — | Unfunded | — | 2004 | Ubuntuparticles.jsBootstrap+11 | — | — |
| 8 | Aircon Energy Developer of solar energy projects | — | — | Unfunded | — | 1974 | — | — | — |
Top 4 Environment companies in Sacramento
#1
Funding Raised · Sacramento, California · founded 2019$150Kraised▾
Funding Raised · Sacramento, California · founded 2019
Provider of global renewable energy solutions
Funding rounds
- May 2022Grant (prize money)$150K
Founders & team
Investors
CalSEED
#2
Series A · Sacramento, California · founded 2004 · 57 employees$33Mraised▾
Series A · Sacramento, California · founded 2004 · 57 employees
Provider of waste-to-energy solution
Funding rounds
- Jul 2019Series A$33M
- Oct 2015Grant (prize money)$100K
Founders & team
Investors
BNP Paribas, Twynam, Cox Enterprises, Breakthrough Energy, Formica, The March Fund
Tech stack
All In One SeoCloudflareCloudflare Bot ManagementContact Form 7CookieyesCore-Js
#3
Acquired · Sacramento, California · founded 1996 · 64 employees$23.5Mraised▾
Acquired · Sacramento, California · founded 1996 · 64 employees
Provider of water treatment and testing services
LinkedIn Pulse recent public activity · Jul 2026
Audience: 139 LinkedIn followers
Hiring: 1 hiring post in 12 mo (public)
Funding rounds
- 2013Series B$22.5M
- Jul 2009Series A—
- Aug 2007Convertible Debt$1M
Investors
Kleiner Perkins, XPV, Miller Environmental Group, SEACOR, Teijin
#4
Funding Raised · Sacramento, California · founded 1989 · 639 employees$103.1Kraised▾
Funding Raised · Sacramento, California · founded 1989 · 639 employees
Provider of waste recycling services
LinkedIn Pulse recent public activity · Jul 2026
Audience: 10k LinkedIn followers — 22.0% of this cohort's audience
Hiring: 2 hiring posts in 12 mo (public) · momentum +2 · hiring: CalRecycle, Analyst III
Funding rounds
- Sep 2008Grant (prize money)$103.1K
Investors
U.S. Environmental Protection Agency
Funding & investor landscape
$56.8Mtotal disclosed funding
4companies funded
6disclosed rounds
0rounds last 90 days
Most active investors
Prism market signals · United States · country-scoped Prism corpus, 6,440,608 docs
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
RESEARCH SIGNALS · United States
How research on Environmental Monitoring is moving in the United States
A read on the academic research around Environmental Monitoring — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 3,039 United States-affiliated papers.
research sentiment over time
200820172026
enthusiastic · positive · guarded tone
Tone is overwhelmingly optimistic and softening — the enthusiastic (strongly-positive) share moved 41% → 38% across 2008–2026.
top research entities
- United States Geological Survey157
- Cary Institute of Ecosystem Studies112
- Environmental Protection Agency84
- National Research Council79
- National Park Service76
leading researchers
Kelly, Vicky · Kelly, Victoria · Catalyst Cooperative · U.S. DOE EM · McIntyre, Cheryl · Stocker-Waldhuber, Martin · Seiser, Bernd · Hartl, Lea
▲
Breakthroughs481 · 16%
▲ 12%→18% share
▲1.5× share momentum0 median citations77% since 2021mostly methods-led
Breakthroughs are rising (12%→18% of field), led by Software deployment.
rising sub-themes (early→recent)
- Software deployment2→31
- Pollution3→27
- Air quality index1→25
- Water quality10→34
- Air pollution3→25
Newly emergingScalability 0→21 · Biodiversity 0→18 · Climate change 0→14
Landmark Environmental sensor networks in ecological research · 165 cites
◆
Advancements804 · 26%
▼ 31%→24% share
▼0.8× share momentum0 median citations64% since 2021mostly methods-led
Advancements are cooling (31%→24% of field), led by Air quality index.
rising sub-themes (early→recent)
- Air quality index14→60
- Air pollution8→51
- Pollutant4→32
- Sampling (signal processing)14→42
- Water quality23→48
Newly emergingKey (lock) 0→17 · Range (aeronautics) 0→10 · Microplastics 0→10
Landmark Tracking complex mixtures of chemicals in our changing environment · 716 cites
▼
Concerns626 · 21%
▼ 21%→20% share
▲1.0× share momentum0 median citations68% since 2021mostly empirical
Concerns are cooling (21%→20% of field), led by Human health.
rising sub-themes (early→recent)
- Human health1→32
- Pollution4→33
- Air quality index6→31
- Pollutant6→28
- Biodiversity1→22
Newly emergingMicroplastics 0→19 · Agriculture 0→18 · Marine debris 0→14
Landmark Past, present, and future perspectives of environmental DNA (eDNA) metabarcoding: A systematic review in methods, monito · 1,184 cites
RESEARCH HOTSPOTS · United States
Where environmental monitoring 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 Area80 · +0.27
Boston61 · +0.43
New York54 · +0.35
Seattle53 · +0.24
Los Angeles37 · +0.39
San Diego33 · +0.26
Atlanta32 · +0.25
Ann Arbor22 · +0.24
Pittsburgh19 · +0.37
Philadelphia19 · +0.41
PATENT SIGNAL · United States
Who's filing environmental monitoring patents in the United States
United States environmental monitoring patent filing is accelerating — 450 filings from 343 assignees (2016–2025), led by LEEO, Valencell, United Parcel Service; annual filings 47→49.
450 filings343 assigneespeak 60/yr2016–2025
filing momentum (YoY 2016–2025)
top patent filers
- LEEO41
- Valencell25
- United Parcel Service21
- Honeywell INT20
- Apple18
- Venturedyne18
- Pillar TECH17
- IND Scient16
Common questions
How many Environment companies are there in Sacramento, United States?
Radar tracks 33 indexable Environment companies headquartered in Sacramento, United States that meet our profile-completeness bar.
What is the total funding raised by Environment companies in Sacramento, United States?
The Environment companies in Sacramento, United States on this list have raised a combined $56.8M in disclosed equity funding across 4 funded companies.
Which is the highest-funded Environment company in Sacramento, United States?
Sierra Energy is the highest-funded Environment company in Sacramento, United States, with $33M in disclosed equity funding.
How many Environment companies in Sacramento, United States are funded?
4 of the 33 Environment companies in Sacramento, United States on this list have disclosed at least one equity funding round.
How many Environment unicorns are there in Sacramento, United States?
None of the Environment companies in Sacramento, United States on this list currently has a disclosed valuation of $1B or more.
Who are the top investors in Sacramento, United States Environment companies?
The most active investors in Sacramento, United States Environment companies on this list include BNP Paribas, Breakthrough Energy, CalSEED, Cox Enterprises, DLA.
Rohit KhannaTrends & Stories
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.