Hartford County, CT
The federal environmental record for Hartford 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
48
federal cleanup sites
11
PFAS-detecting water systems
73
TRI facilities
246
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Old Southington Landfill | Southington | deleted | 09/21/1984 |
| Solvents Recovery Service of New England | Southington | on the NPL | 09/08/1983 |
Drinking water: PFAS testing
Public water systems serving Hartford 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 |
|---|---|---|
| Avon Water Co. CT0040011 | PFOS: 8 ng/L PFOA: 7 ng/L PFHxA: 4 ng/L | above final limit |
| BRISTOL WATER DEPARTMENT CT0170011 | PFOA: 4.1 ng/L PFPeA: 3.1 ng/L | above final limit |
| CTWC - NAUGATUCK REG-COLLINSVILLE SYS CT0230011 | PFOS: 5.6 ng/L PFOA: 4.9 ng/L | above final limit |
| CTWC - NORTHERN REG-WESTERN SYSTEM CT0473011 | PFOA: 8 ng/L PFOS: 6 ng/L PFBA: 5 ng/L | above final limit |
| HAZARDVILLE WATER COMPANY CT0490021 | PFOA: 8.6 ng/L PFHxS: 8.1 ng/L PFOS: 5.4 ng/L | above final limit |
| CTWC - UNIONVILLE SYSTEM CT0520011 | PFBA: 7 ng/L PFOS: 6 ng/L PFOA: 6 ng/L | above final limit |
| MANCHESTER WATER DEPARTMENT CT0770021 | PFOS: 16 ng/L PFBS: 15 ng/L PFOA: 13 ng/L | above final limit |
| VALLEY WATER SYSTEMS, INC. CT1100011 | PFOS: 6.8 ng/L PFBA: 6.4 ng/L PFOA: 5.2 ng/L | above final limit |
| AQUARION WATER CO OF CT-SIMSBURY SYSTEM CT1280021 | ADONA: 8.1 ng/L PFOA: 4.4 ng/L PFOS: 4.3 ng/L | above final limit |
| SOUTHINGTON WATER DEPARTMENT CT1310011 | PFOA: 8 ng/L PFOS: 6 ng/L PFBA: 5 ng/L | above final limit |
| BERLIN WATER CONTROL COMMISSION CT0070021 | PFHxS: 3.8 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
73 facilities in Hartford filed TRI reports for 2024, totalling 392k lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| PRATT & WHITNEY | EAST HARTFORD | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nickel | 95k lb |
| METAL FINISHING TECHNOLOGIES LLC | FORESTVILLE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 61k lb |
| HAR-CONN CHROME CO | WEST HARTFORD | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead And Lead Compounds | 47k lb |
| CONNECTICUT GALVANIZING CORP | GLASTONBURY | Zinc compounds, Lead | 41k lb |
| AHLSTROM NONWOVENS LLC | WINDSOR LOCKS | Ammonia | 33k lb |
| MARMON INDUSTRIAL ENERGY & INFRASTRUCTURE GROUP | EAST GRANBY | Ozone, Antimony And Antimony Compounds | 26k lb |
| ARMOLOY OF CT INC. | BRISTOL | Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 14k lb |
| SCAPA NA LLC | WINDSOR | Toluene, Xylene (mixed isomers) | 11k lb |
| CLEAN HARBORS OF CONNECTICUT INC | BRISTOL | Arsenic, Polycyclic aromatic compounds | 11k lb |
| IDEX HEALTH & SCIENCE LLC | BRISTOL | Dichloromethane | 10k lb |
| PAPE ELECTROPLATING CO. LLC | NEW BRITAIN | Zinc compounds | 8k lb |
| STANLEY WORKS HAND TOOLS DIV. | NEW BRITAIN | Certain glycol ethers | 6k lb |
| ASSA ABLOY ACCESS & EGRESS HARDWARE GROUP - CORBIN RUSSWIN | BERLIN | Copper, Nickel | 5k lb |
| ELEMENT MATERIALS TECHNOLOGY HARTFORD INC. | SOUTH WINDSOR | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 3k lb |
| ABBOTT BALL CO INC | WEST HARTFORD | Chromium | 3k lb |
| AHLSTROM POWER WINDSOR LOCKS LLC | WINDSOR LOCKS | Ammonia | 3k lb |
| LIGHT METALS COLORING CO | SOUTHINGTON | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 2k lb |
| MICROCARE LLC | NEW BRITAIN | 1,2-Dichloroethylene, 1-Bromopropane | 2k lb |
| COLT'S MANUFACTURING CO LLC | WEST HARTFORD | Chromium, Lead And Lead Compounds | 2k lb |
| ITW SHINEMARK | BLOOMFIELD | Toluene | 2k lb |
| KAMATICS CORP | BLOOMFIELD | Nitric acid, Chromium | 1k lb |
| STANCHEM INC | EAST BERLIN | Vinyl acetate, Butyl acrylate | 1k lb |
| DUR-A-FLEX | EAST HARTFORD | Methyl methacrylate, Diisocyanates | 898 lb |
| EBL PRODUCTS INC | EAST HARTFORD | Lead And Lead Compounds | 781 lb |
| DYNO NOBEL INC | SIMSBURY | Lead And Lead Compounds, Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 605 lb |
Underground fuel tanks
EPA's UST Finder records 2,508 tank facilities in Hartford: 1,288 tanks in service and 8,342 closed. 623 fuel releases are on record, of which 246 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Hartford as Zone 3, the lowest predicted indoor radon (under 2 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 Hartford, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ACCURATE BRAZING COMPANYNEWINGTON
- ALLIED METAL PRODUCTSBERLIN
- AMCO MANUFACTURING (FORMER)EAST WINDSOR
- ANGELILLO PROPERTYSOUTHINGTON
- APEX MACHINE AND TOOL COMPANYFARMINGTON
- CENTRAL WAREHOUSE - BRK STROCKY HILL
- CT DEPT OF TRANSPORTATION LABORATORYROCKY HILL
- CT MILITARY DEPT ARMY AVIATION SUPPORT FACILITYWINDSOR LOCKS
- CT SPRING & STAMPING CORPFARMINGTON
- DELL MANUFACTURING COMPANYFARMINGTON
- DONCASTERS NEW ENGLAND AIRFOILFARMINGTON
- EAST HARTFORD MUNICIPAL LANDFILLEAST HARTFORD
- EDAC TECHNOLOGIES, GROSITE DIVISIONFARMINGTON
- EDMUNDS MANUFACTURINGFARMINGTON
- ENFIELD BIGELOW CARPET MILLENFIELD
- GENERAL ELECTRIC CONSUMER & INDUSTRIALPLAINVILLE
- GILL L. M. WELDINGMANCHESTER
- GIOGRAPHICS (FORMER)MANCHESTER
- HARTFORD BALL COMPANYROCKY HILL
- HATCH STREET MERCURY RELEASENEW BRITAIN
- HAYES, INC. (FORMER)UNIONVILLE
- HP HOOD ICE CREAM PLANTSUFFIELD
- IVANHOE TOOL AND DIE SITEBRISTOL
- JACOBS MANUFACTURING COMPANY, THEWEST HARTFORD
- JOB PLATINGPLAINVILLE
- KALART VICTOR CORPORATIONPLAINVILLE
- KAMAN AEROSPACE CORP NAVY WEAPONS RESERVE INDUSTRIAL PLANTBLOOMFIELD
- KEMENT PARK LANDFILLEAST WINDSOR
- KNOLIS ATOMIC POWER LABORATORY WINDSOR SITEWINDSOR
- MANCHESTER CITY OF HHHWCMANCHESTER
- MAREK PROPERTYSOUTHINGTON
- MARLBOROUGH TRANSFER STATIONMARLBOROUGH
- MERRIFIELD PAINT COMPANY, INC.ROCKY HILL
- MOTT METALLURGICAL CORPPLAINVILLE
- NEWBERRY INDUSTRIESEAST WINDSOR
- NICKSON INDUSTRIESPLAINVILLE
- NORTHEAST UTILITIES SUBSTATIONBRISTOL
- OLD SOUTHINGTON LANDFILLSOUTHINGTON
- OLSON BROTHERS COMPANYPLAINVILLE
- RONCARI TRAP ROCK QUARRYEAST GRANBY
- ROSER TANNERYGLASTONBURY
- SESSIONS CLOCK (FORMER)BRISTOL
- SUPERIOR ELECTRICBRISTOL
- TORREY S CRANE COMPANYSOUTHINGTON (PLANTSVILLE)
- TRW MARLIN ROCKWELL DIV. (FORMER)PLAINVILLE
- WASLEY PRODUCTS/PRECISION MOLDINGPLAINVILLE
- WATERBURY CENTERLESS GRINDING COMPANYSOUTHINGTON (PLANTSVILLE)
- WHITNON SPINDLEFARMINGTON