TRI Facilities
306
EPCRA Section 313 reporters
2023 EPA TRI data 306 facilities 503 water systems
Connecticut Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is Connecticut's (CT) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
CT regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
236 records
- RCRA · Subtitle C 17
RCRA Subtitle C (Superfund-site proxy)
17 records
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
Water Systems
503
SDWIS regulated
Superfund Sites
17
13 active NPL
Total Releases
8.9M lbs
TRI cumulative disclosure
Compliance Snapshot - CT
Sites with no recorded health violations 70.8%
Sites with at least one open violation 29.2%
Connecticut consolidates three federal EPA datasets into one statewide environmental profile: 306 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 503 community water systems regulated under the Safe Drinking Water Act, and 17 sites on the Superfund National Priorities List.
TRI facilities in CT have cumulatively disclosed 8.9M lbs of toxic chemical releases, while SDWIS records show 749 total violations across the state's regulated water systems, of which 236 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Fairfield, Hartford, New Haven, which account for the highest combined facility, water-system, and Superfund presence.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
306
Water Systems
503
Superfund Sites
17
Total Violations
749
Total Releases
8.9M lbs
Health Violations
236
water systems
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Clean Harbors of Connecticut Inc | 1.5M lbs |
| 2 | Unimetal Surface Finishing LLC | 644.8K lbs |
| 3 | Allnex USA Inc. Wallingford Ct Site | 436.7K lbs |
| 4 | Pratt & Whitney | 306.2K lbs |
| 5 | American Greenfuels LLC | 280.7K lbs |
| 6 | Har-Conn Chrome Co | 272.6K lbs |
| 7 | Tradebe Treatment & Recycling of Bridgeport LLC | 223.2K lbs |
| 8 | Connecticut Galvanizing Corp | 209.1K lbs |
| 9 | Metal Finishing Technologies LLC | 207.1K lbs |
| 10 | Hutchinson Precision Sealing Systems Inc | 199.3K lbs |
| 11 | Ahlstrom Nonwovens LLC | 196.2K lbs |
| 12 | Cpv Towantic Energy Center | 193.2K lbs |
| 13 | Unimetal Surface Finishing LLC | 190.0K lbs |
| 14 | Element Materials Technology Hartford Inc. | 188.7K lbs |
| 15 | Electric Boat Corp | 166.3K lbs |
| 16 | Stanley Works Hand Tools Div. | 162.7K lbs |
| 17 | King Industries Inc | 150.6K lbs |
| 18 | Ametek Specialty Metal Products Div | 150.4K lbs |
| 19 | Prysmian Cable & Systems LLC | 143.6K lbs |
| 20 | Middletown Power LLC | 130.3K lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| MEADOWS AT CROSS RIVER | 630 | 90 |
| 31 GRIST MILL RD | 30 | 18 |
| NORWICH PUBLIC UTILITIES | 36,163 | 18 |
| PINECREST CONDOMINIUMS | 110 | 16 |
| ROCK TERRACE TRAILER PARK | 130 | 15 |
| JUNIPER CLUB INC. | 104 | 13 |
| HUBBARD HILL APARTMENTS | 36 | 11 |
| ORCHARD ACRES ASSOCIATION | 176 | 10 |
| MARIANAPOLIS PREP SCHOOL - ST ALBERTS | 51 | 10 |
| TOLLAND WATER DEPT - TORRY ROAD | 204 | 10 |
| ABENAKI WATER/WHITE ROCK WATER | 238 | 10 |
| ELMWOOD COURT, LLC | 54 | 9 |
| Mashantucket Pequot Water System | 26,445 | 8 |
| LAKE LILLINONAH SHORES CONDOS | 130 | 8 |
| TWIN HILLS WATER DISTRICT | 156 | 8 |
| KNOLLCREST TAX DISTRICT | 356 | 8 |
| WOODLAND SUMMIT COMMUNITY WATER ASSN | 216 | 8 |
| 39 HOP BROOK RD - APT COMPLEX | 36 | 7 |
| CONRADS PARK | 60 | 7 |
| SUNNY VALLEY TAX DISTRICT | 500 | 7 |
| CHELSEA FAMILY HOUSING | 44 | 7 |
| BROOKFIELD HILLS CONDOMINIUM UNIT OWNERS | 144 | 6 |
| AQUARION-FALLS VILLAGE | 488 | 6 |
| CAMPBELL HEIGHTS APARTMENTS | 152 | 6 |
| YESHIVA OF WATERBURY-DURHAM CAMPUS | 490 | 6 |
| MOOSUP MANOR | 27 | 6 |
| QUINEBAUG MOBILE HOME PARK | 205 | 6 |
| ARROWHEAD BY THE LAKE ASSOCIATION, INC. | 288 | 6 |
| LINDHBROOK WATER COMPANY | 200 | 6 |
| WOODLAWN APARTMENTS | 96 | 5 |
| ORCHARD HILL ASSOCIATION | 30 | 5 |
| 298-302 ALBANY TURNPIKE | 28 | 5 |
| CTWC - WESTCHESTER EAST | 153 | 5 |
| HEBRON ARMS APARTMENTS | 39 | 5 |
| LEDYARD WPCA - LEDYARD CENTER | 3,294 | 5 |
| LAKESIDE MANOR APARTMENTS | 72 | 5 |
| BOXWOOD CONDOMINIUM ASSOCIATION | 28 | 5 |
| THOMPSON HILL WATER CO - PAULA LANE DIV | 85 | 5 |
| VOLUNTOWN HOUSING AUTHORITY | 42 | 5 |
| RIDGEVIEW HEIGHTS | 96 | 5 |
| WACCABUC FARMS INC. | 26 | 5 |
| CHELSEA ELDERLY HOUSING | 68 | 5 |
| BIRCH LANDING CONDOMINIUM | 82 | 5 |
| MAR-LEA PARK APARTMENTS | 50 | 4 |
| CEDAR TERRACE PROP OWNERS ASSN | 66 | 4 |
| CHESTELM HEALTH & REHABILITATION CENTER | 120 | 4 |
| EAST WINDSOR HOUSING AUTHORITY | 94 | 4 |
| MAPLEWOOD-MILLBROOK APARTMENTS | 153 | 4 |
| MERIDEN WATER DIVISION | 58,441 | 4 |
| FOX LAUREL MOBILE HOME PARK, LLC | 40 | 4 |
| FREEDOM VILLAGE ELDERLY HOUSING | 43 | 4 |
| THOMPSON HILL WATER CO - BEECHWOOD ACRES | 77 | 4 |
| BLUE TRAILS WATER ASSOCIATION | 228 | 4 |
| LYME ACADEMY APARTMENTS,LLC | 48 | 4 |
| JUMBO APARTMENTS | 35 | 4 |
| AQUARION-RIDGEFIELD KNOLLS | 958 | 4 |
| DEER PARK APARTMENTS | 125 | 4 |
| ABENAKI WATER/GILFORD VILLAGE | 190 | 4 |
| Mohegan Tribal Utility Authority | 31,961 | 3 |
| ASHFORD HILLS APARTMENTS | 136 | 3 |
| PERRY HILL ESTATES APARTMENTS INC. | 144 | 3 |
| EVANGELICAL CHRISTIAN CENTER - MAIN | 84 | 3 |
| BETHEL WATER DEPT | 9,507 | 3 |
| WOODHALL SCHOOL, INC | 68 | 3 |
| SUNSET APARTMENTS LLC | 46 | 3 |
| COLCHESTER COMMONS | 224 | 3 |
| CTWC - PILGRIM HILLS DIVISION | 229 | 3 |
| RIDGEWOOD HILLS ASSOCIATION SYSTEM 1 | 36 | 3 |
| JEWETT CITY WATER COMPANY | 6,840 | 3 |
| CTWC - REDWOOD FARMS DIVISION | 424 | 3 |
| CTWC - FOREST HOMES DIVISION | 100 | 3 |
| OAKDALE HEIGHTS ASSOCIATION, INC | 876 | 3 |
| MARINA COVE | 70 | 3 |
| CANDLE HILL MOBILE HOME PARK | 233 | 3 |
| LILLINONAH PARK ESTATES HOMEOWNERS ASSN | 128 | 3 |
| 55 SUGAR STREET | 158 | 3 |
| NORTHFORD GLEN CONDOMINIUM ASSOCIATION | 84 | 3 |
| NORTHSTONE GARDENS | 79 | 3 |
| SOUTH NORWALK ELECTRIC & WATER | 42,000 | 3 |
| SALEM MANOR CONDOMINIUMS, SYSTEM #1 | 32 | 3 |
| OAKDALE MANOR WATER ASSOCIATION | 40 | 3 |
| SAFE HARBOR, INC. | 50 | 3 |
| ROSELAND TERRACE ASSOCIATION, INC. | 100 | 3 |
| WOODSTOCK MEADOWS CONDOMINIUM ASSN. | 180 | 3 |
| ROSEBROOK WATER | 1,050 | 3 |
| HOP RIVER HOMES | 26 | 2 |
| 890 BOSTON TURNPIKE | 60 | 2 |
| BRIDGEWATER COMMONS CONDOMINIUMS | 51 | 2 |
| WOODCREEK VILLAGE CONDOMINIUM ASSN, INC | 72 | 2 |
| BROOKFIELD HOUSING AUTHORITY | 37 | 2 |
| CHAPLIN WOODS CONDOMINIUMS | 69 | 2 |
| AARON MANOR NURSING & REHAB CENTER | 81 | 2 |
| CTWC - SHORELINE REG-CHESTER VLLG WEST | 216 | 2 |
| DANBURY WATER DEPARTMENT | 62,055 | 2 |
| HAWTHORNE TERRACE ASSOC | 156 | 2 |
| CORNELL HILLS ASSOC, INC | 108 | 2 |
| GOODSPEED ACTOR HOUSING - THE VILLAGE | 40 | 2 |
| MALLARD COVE CONDOMINIUM ASSN. | 177 | 2 |
| CTWC - SPICE HILL DIVISION | 712 | 2 |
| ESSEX GARDENS | 72 | 2 |
Cities with Water Issues
Avon
Pop: -
Bloomfield
Pop: -
East Granby
Pop: -
Farmington
Pop: -
Glastonbury
Pop: -
Berlin
Pop: -
Manchester
Pop: -
Bolton
Pop: -
New Hartford
Pop: -
Simsbury
Pop: -
South Windsor
Pop: -
Stafford Springs
Pop: -
Winsted
Pop: -
East Hartford
Pop: -
West Hartford
Pop: -
Willimantic
Pop: -
Dayville
Pop: -
Woodstock
Pop: -
Pomfret
Pop: -
Putnam
Pop: -
Superfund Sites (17)
| Site Name | Status | HRS Score |
|---|---|---|
| Barkhamsted-New Hartford Landfill | NPL Site | 38.05 |
| Beacon Heights Landfill | NPL Site | 46.77 |
| Cheshire Ground Water Contamination | Deleted NPL Site | 35.57 |
| Durham Meadows | NPL Site | 33.94 |
| Gallup's Quarry | NPL Site | 46.29 |
| Kellogg-Deering Well Field | NPL Site | 39.92 |
| Laurel Park, Inc. | NPL Site | - |
| Linemaster Switch Corp. | NPL Site | 33.71 |
| New London Submarine Base | NPL Site | 36.53 |
| Nutmeg Valley Road | Deleted NPL Site | 42.69 |
| Old Southington Landfill | Deleted NPL Site | 54.35 |
| Precision Plating Corp. | NPL Site | 49.10 |
| Raymark Industries, Inc. | NPL Site | - |
| Revere Textile Prints Corp. | Deleted NPL Site | 41.06 |
| Scovill Industrial Landfill | NPL Site | 50.00 |
| Solvents Recovery Service of New England | NPL Site | 44.93 |
| Yaworski Waste Lagoon | NPL Site | 36.72 |
Counties (8 total)
| County | Facilities |
|---|---|
| Fairfield | 46 |
| Hartford | 92 |
| New Haven | 91 |
| Middlesex | 16 |
| New London | 14 |
| Litchfield | 23 |
| Windham | 19 |
| Tolland | 5 |
Largest Cities
Avon
Pop: -
2 facilities · 1 water systems
Bloomfield
Pop: -
3 facilities · 4 water systems
Bristol
Pop: -
6 facilities · 2 water systems
Forestville
Pop: -
1 facilities · 0 water systems
Canaan
Pop: -
1 facilities · 0 water systems
North Canaan
Pop: -
1 facilities · 0 water systems
East Berlin
Pop: -
2 facilities · 0 water systems
East Granby
Pop: -
4 facilities · 1 water systems
Ellington
Pop: -
1 facilities · 0 water systems
Farmington
Pop: -
2 facilities · 1 water systems
Glastonbury
Pop: -
2 facilities · 2 water systems
Berlin
Pop: -
2 facilities · 2 water systems
Manchester
Pop: -
8 facilities · 3 water systems
Newington
Pop: -
8 facilities · 1 water systems
Bolton
Pop: -
1 facilities · 4 water systems
New Britain
Pop: -
7 facilities · 1 water systems
New Hartford
Pop: -
1 facilities · 1 water systems
Plainville
Pop: -
5 facilities · 2 water systems
Simsbury
Pop: -
2 facilities · 1 water systems
South Windsor
Pop: -
3 facilities · 1 water systems
Frequently Asked Questions
How many polluting facilities are in Connecticut? ▼
Connecticut has 306 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 8.9M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Connecticut have Superfund sites? ▼
Yes, Connecticut has 17 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Is the water safe in Connecticut? ▼
Connecticut has 503 EPA-regulated water systems. 236 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental data is available for Connecticut? ▼
PlainEnviro provides three categories of EPA environmental data for Connecticut: Toxic Release Inventory (TRI) data covering 306 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 503 water systems, and Superfund National Priorities List (NPL) data for 17 contaminated sites.
How does Connecticut compare to other states environmentally? ▼
Connecticut has 306 TRI facilities with 8.9M lbs in total releases, 17 Superfund sites, and 749 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
Explore More Data for Connecticut
TRI Facilities in Connecticut →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Connecticut →
Community water systems and their violation records
Air Quality in Connecticut →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Connecticut: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Connecticut's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 306 TRI facilities reporting in Connecticut for the largest reported releases near a specific county. View facilities
- 236 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Connecticut compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.