Best Waste & Water Management Companies in Connecticut, United States
The 44 best Waste & Water Management companies in Connecticut, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Infiltrator.
Our analysis of 50 Waste & Water Management companies
$2.9b in tracked funding; 89% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Waste & Water Management companies in Connecticut
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Infiltrator Wastewater treatment systems manufacturer | $186M | 135 mo ago | Acquired | Roy Moore CEO & President | 1987 | Apple iCloud MailZohoMicrosoft ASP.NET+14 | — | 4 job openings |
| 2 | Oakleaf Waste Management Provider of waste recovery and recycling services | $30M | 280 mo ago | Acquired | Jim Barnes CEO | 1995 | — | — | — |
| 3 | Oak Ridge Waste & Recycling Provider of trash collection, container rental, and recycling services | $28M | 153 mo ago | Acquired | — | 2007 | WordPressMySQLMariaDB+28 | — | — |
| 4 | Protein Evolution Provider of plastic waste services | $20M | 45 mo ago | Series B | Connor Lynn Co-Founder & CBO | 2021 | Radix UITailwind CSSshadcn/ui+6 | 20 patents Patents concentrated in chemistry & materials | — |
| 5 | BullBag Provider of solutions for waste collection | $9M | 94 mo ago | Series B | — | 2006 | Apple iCloud MailMicrosoft 365Java+12 | — | — |
| 6 | Roundtrip EV Provider of end-to-end solutions for transitioning to electric truck fleets | $850K | 27 mo ago | Series A | James Sherman Co-Founder | 2020 | — | 15 patents Secure low-power real-time asset tracking and geofencing communication technologies. | — |
| 7 | ainwater Provider of wastewater management services | $537K | 24 mo ago | Seed | Camilo Huneeus CEO | 2020 | WordPressMySQLPHP+16 | — | — |
| 8 | Biomass Controls Provider of waste & water management services | $100K | 85 mo ago | Funding Raised | Jeff Hallowell Founder | 2015 | — | — | — |
Top 9 Waste & Water Management companies in Connecticut
#1
Seed · New Haven, Connecticut · founded 2020$537Kraised▾
Provider of wastewater management services
- Aug 2024Seed$537K
- Apr 2024Grant (prize money)—
#2
Series A · Stamford, Connecticut · founded 2020 · 8 employees$850Kraised▾
Provider of end-to-end solutions for transitioning to electric truck fleets. The company offers services including site evaluation, fleet optimization, and long-range planning for transitioning to electric trucks. It prepares electrical drawings, obtains permits, and builds charging infrastructure. The company also provides ongoing monitoring, maintenance, and software for fleet management and performance optimization.
- May 2024Series A$975K
- Oct 2022Seed$850K
#3
Series B · New Haven, Connecticut · founded 2021 · 34 employees$20Mraised▾
Provider of plastic waste services
- Nov 2022Series B$20M
#4
Acquired · Old Saybrook, Connecticut · founded 1987 · 398 employees$186Mraised▾
Wastewater treatment systems manufacturer
- May 2015Series D$186M
#5
Acquired · Danbury, Connecticut · founded 2007 · 400 employees$28.5Mraised▾
Provider of waste removal and recycling services intended for homes and businesses. The company offers regional solid waste collection, recycling and disposal services to residential and commercial customers including office buildings, shopping malls, private homes, restaurants and conference centres as well as local and county municipalities, apartment buildings, hotels, motels and industrial centers in the Northeastern United States.
- Nov 2013PE$28.5M
- 2013Seed—
#6
Acquired · Windsor, Connecticut · founded 1995 · 650 employees$30Mraised▾
Provider of logistics services related to waste and recycling solutions. The company has a nationwide network of 2,500 preferred haulers and more than 85,000 locations served throughout North America.
- Apr 2003PE$30M
#7
Series B · Killingworth, Connecticut · founded 2006 · 23 employees$9.2Mraised▾
Provider of solutions for waste collection
- Oct 2018Series B$5.9M
- Aug 2017Series A$3.3M
#8
Funding Raised · Putnam, Connecticut · founded 2015 · 5 employees$100Kraised▾
Developer of a renewable energy technology intended to process and valorize biogenic waste. The company's refinery produces carbon-rich biochar from inputs including manure, textiles, food, and biosolids to deliver improvements in health, the environment, and quality of life while promoting gender equality, enabling clients to recover nutrients, reduce GHG and sequester carbon.
- Jul 2019Grant (prize money)$100K
#9
Acquired · Stamford, Connecticut · founded 2005 · 51 employees—raised▾
Provider of waste collection services
- 2012PE—
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Waste & Water Management coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Water Treatment is moving in the United States
A read on the academic research around Water Treatment — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 3,356 United States-affiliated papers.
- University of North Carolina at Chapel Hill127
- Environmental Protection Agency100
- Arizona State University67
- Stanford University66
- Purdue University West Lafayette60
- Adsorption12→68
- Membrane13→53
- Photocatalysis3→26
- Degradation (telecommunications)1→23
- Wastewater9→30
- Adsorption51→158
- Wastewater60→128
- Sewage treatment30→75
- Water quality62→96
- Degradation (telecommunications)11→40
- Water quality51→93
- Sewage treatment8→35
- Wastewater19→43
- Water supply17→30
- Reverse osmosis11→23
Where water treatment 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.
Who's filing water treatment patents in the United States
United States water treatment patent filing is cooling — 3,379 filings from 2,991 assignees (2016–2025), led by Siemens, General Electric, Access Business Group INT; annual filings 397→269.
- Siemens277
- General Electric185
- Access Business Group INT152
- Ecolab USA132
- Evoqua Water TECH116
- D C Water & Sewer Authority81
- Hampton Roads Sanitation Distr77
- 3M Innovative Properties69
Common questions
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.