Fairfield County, CT
The federal environmental record for Fairfield County: what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
2
Superfund NPL sites
28
federal cleanup sites
11
PFAS-detecting water systems
40
TRI facilities
199
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Kellogg-Deering Well Field | Norwalk | on the NPL | 09/21/1984 |
| Raymark Industries, Inc. | Stratford | on the NPL | 04/25/1995 |
Drinking water: PFAS testing
Public water systems serving Fairfield with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| BETHEL WATER DEPT CT0090011 | PFOA: 5.9 ng/L PFBS: 3.9 ng/L PFPeA: 3 ng/L | above final limit |
| AQUARION WATER CO OF CT-MAIN SYSTEM CT0150011 | PFOA: 10.9 ng/L PFBA: 7.6 ng/L PFHxA: 7.4 ng/L | above final limit |
| DANBURY WATER DEPARTMENT CT0340011 | PFOA: 5.4 ng/L PFBS: 4.3 ng/L PFHxA: 3.6 ng/L | above final limit |
| AQUARION WATER CO OF CT-NOROTON SYSTEM CT0350011 | PFOA: 5.8 ng/L PFBA: 5.5 ng/L PFHxA: 3.7 ng/L | above final limit |
| AQUARION WATER CO OF CT-GREENWICH SYSTEM CT0570011 | PFOA: 5.6 ng/L PFOS: 4.1 ng/L PFHxA: 4 ng/L | above final limit |
| AQUARION WATER CO OF CT-NEW CANAAN SYS CT0900011 | PFOA: 5.6 ng/L PFHxA: 3.4 ng/L PFPeA: 3 ng/L | above final limit |
| AQUARION WATER CO OF CT-NEW MILFORD CT0960011 | PFPeA: 6.7 ng/L PFHxA: 5.8 ng/L PFBS: 5.5 ng/L | above final limit |
| AQUARION WATER CO OF CT-NEWTOWN SYSTEM CT0970011 | PFOA: 15.9 ng/L PFOS: 12.7 ng/L PFPeA: 8.4 ng/L | above final limit |
| NORWALK FIRST TAXING DISTRICT CT1030011 | PFOS: 11.2 ng/L PFOA: 9.5 ng/L PFBS: 6.4 ng/L | above final limit |
| AQUARION WATER CO OF CT-RIDGEFIELD SYS CT1180011 | PFPeA: 10.6 ng/L PFOA: 10.6 ng/L PFHxA: 9.6 ng/L | above final limit |
| AQUARION WATER CO OF CT-STAMFORD CT1350011 | PFOA: 4.3 ng/L PFPeA: 3.1 ng/L PFHxA: 3 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
40 facilities in Fairfield filed TRI reports for 2024, totalling 553k lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| KING INDUSTRIES INC | NORWALK | Methanol, Barium And Barium Compounds | 430k lb |
| HAMPFORD RESEARCH INC | STRATFORD | Dichloromethane, Methanol | 23k lb |
| TALALAY GLOBAL | SHELTON | Zinc compounds, Ethylene glycol | 18k lb |
| MEMRY DBA RESONETICS LLC | BETHEL | Methanol, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 17k lb |
| BRIDGEPORT FITTINGS LLC | STRATFORD | Zinc compounds | 14k lb |
| RSA CORP | DANBURY | Methanol, Toluene | 12k lb |
| RESIN SOLUTIONS LLC - STRATFORD FACILITY | STRATFORD | Zinc compounds, Acrylic acid | 11k lb |
| VANDERBILT CHEMICALS LLC | BETHEL | Methanol, Carbon disulfide | 8k lb |
| SPARTECH LLC | STAMFORD | Methyl methacrylate | 6k lb |
| SIKORSKY AIRCRAFT STRATFORD FACILITY | STRATFORD | Nitric acid, Methanol | 5k lb |
| BRIDGEPORT HARBOR STATION UNIT 5 | BRIDGEPORT | Ammonia | 3k lb |
| GREENFIELD GLOBAL USA INC. | BROOKFIELD | Methanol, tert-Butyl alcohol | 2k lb |
| SUPERIOR PLATING CO | SOUTHPORT | Lead And Lead Compounds | 2k lb |
| SPRAGUE BRIDGEPORT TERMINAL | BRIDGEPORT | n-Hexane, Toluene | 1k lb |
| CS CLEAN SOLUTIONS INC. | DANBURY | Copper compounds | 1k lb |
| STANLEY ENGINEERED FASTENING LLC | DANBURY | Lead, Copper | 665 lb |
| BEDOUKIAN RESEARCH INC. | DANBURY | n-Hexane, Cyclohexane | 252 lb |
| AMERICAN HEAT TREATING INC | MONROE | Ammonia | 250 lb |
| ASML US LP | WILTON | Lead compounds | 87 lb |
| SANDVIK WIRE AND HEATING TECHNOLOGIES | BETHEL | Nickel, Copper | 61 lb |
| ANCO ENGINEERING INC. | SHELTON | Lead | 43 lb |
| ASHCROFT INC | STRATFORD | Mercury | 25 lb |
| LEX PRODUCTS LLC | SHELTON | Diisocyanates | 5 lb |
| US CHROME CORP OF CONNECTICUT | STRATFORD | Lead And Lead Compounds | 2 lb |
| FEDERAL CORRECTIONAL INSTITUTION | DANBURY | Lead | 1 lb |
Underground fuel tanks
EPA's UST Finder records 1,846 tank facilities in Fairfield: 1,203 tanks in service and 6,387 closed. 560 fuel releases are on record, of which 199 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Fairfield as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Fairfield, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- A. H. NILSON MACHINE COMPANYSHELTON
- BEACON POINT LANDFILLSTRATFORD
- BRIDGEPORT BRASS (FORMER)NORWALK
- CARPENTER TECHNOLOGY CORPORATIONBRIDGEPORT
- CONNECTICUT ENGINEERING ASSOC CORPSANDY HOOK
- EMHART FASTENING TEKNOLOGIESDANBURY
- EMHART FASTENING TEKNOLOGIESSHELTON
- EXIDE CORPORATIONFAIRFIELD
- FAMOUS CLEANERSBETHEL
- FEDERAL CORRECTIONAL INSTITUTION - DANBURYDANBURY
- KELLOGG-DEERING WELL FIELDNORWALK
- KING INDUSTRIES, INC.NORWALK
- NORANDA METAL INDUSTRIESNEWTOWN
- PERKIN - ELMER CORPORATIONRIDGEFIELD
- PERKIN ELMER CHROM DIVISIONNORWALK
- QUALITY CLEANERS (FORMER)NEWTOWN
- RADIAL BEARINGDANBURY
- RAPID POWER TECHNOLOGIES, INC.BROOKFIELD
- RAYMARK INDUSTRIESSTRATFORD
- RBC HEIM BEARINGSFAIRFIELD
- REYNOLDS ALUMINUM BUILDING PROD COMPANYSTRATFORD
- SATIN AMERICAN CORPORATIONSHELTON
- SCOFIELDTOWN ROAD PARKSTAMFORD
- STAMFORD NATURAL GAS STORAGE FACILITYSTAMFORD
- TIME INC., R & DSTAMFORD
- TRADEBE TREATMENT & RECYCLINGBRIDGEPORT
- WEIR FARM NATIONAL HISTORIC SITEWILTON
- WILTON LANDFILLWILTON