Hillsborough County, NH
The federal environmental record for Hillsborough County (population 427,354): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
6
Superfund NPL sites
33
federal cleanup sites
4
PFAS-detecting water systems
34
TRI facilities
134
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Fletcher's Paint Works & Storage | Milford | on the NPL | 03/31/1989 |
| Mohawk Tannery | Nashua | proposed | - |
| New Hampshire Plating Co. | Merrimack | on the NPL | 10/14/1992 |
| Savage Municipal Water Supply | Milford | on the NPL | 09/21/1984 |
| South Municipal Water Supply Well | Peterborough | on the NPL | 09/21/1984 |
| Sylvester | Nashua | on the NPL | 09/08/1983 |
Drinking water: PFAS testing
Public water systems serving Hillsborough 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 |
|---|---|---|
| LITTLE POND ESTATES NH0192080 | PFOA: 5.4 ng/L | above final limit |
| HUDSON WATER DEPT NH1201010 | PFOA: 9 ng/L PFPeA: 5 ng/L PFHxA: 4 ng/L | above final limit |
| PEU/LITCHFIELD NH1371010 | PFOA: 8.1 ng/L PFPeA: 7.8 ng/L PFHxA: 5.4 ng/L | above final limit |
| MANCHESTER WATER WORKS, NH NH1471010 | PFOA: 5 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
34 facilities in Hillsborough filed TRI reports for 2024, totalling 52k lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| VIBRACOUSTIC NA LP | MANCHESTER | N-Methyl-2-pyrrolidone | 13k lb |
| HITCHINER COUNTERGRAVITY CAST OPERATIONS (VCO/DCO/MCT) | MILFORD | Nickel, Chromium | 11k lb |
| WORTHEN INDUSTRIES | NASHUA | Toluene | 8k lb |
| CAN-ONE / KJ CAN USA | NASHUA | Certain glycol ethers, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 7k lb |
| AMPHENOL APC INC | NASHUA | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Certain glycol ethers | 5k lb |
| WORTHEN INDUSTRIES INC UPACO DIV | NASHUA | Toluene, Antimony compounds | 2k lb |
| PRYSMIAN CABLE & SYSTEMS LLC | MANCHESTER | Diisononyl Phthalates (DINP), Zinc compounds | 2k lb |
| PARKER HANNIFIN CORP CHOMERICS DIV | HUDSON | Toluene | 1k lb |
| BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATION | NASHUA | N-Methyl-2-pyrrolidone, Lead | 1k lb |
| HITCHINER COUNTERGRAVITY CENTRIFUGAL CAST OPERATIONS (CCO) | MILFORD | Nickel, Chromium | 547 lb |
| INFINITUM ELECTRIC INC. | NASHUA | Ammonia | 250 lb |
| VHG LABS INC. DBA LGC STANDARDS | BEDFORD | Lead | 223 lb |
| NEW HAMPSHIRE BALL BEARINGS INC | PETERBOROUGH | Chromium, Methanol | 103 lb |
| MORGAN ADVANCED CERAMICS INC | HUDSON | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 102 lb |
| MARMON AEROSPACE & DEFENSE LLC | MANCHESTER | Lead And Lead Compounds | 91 lb |
| INTERVALA LLC | MANCHESTER | Lead compounds | 74 lb |
| COLT REFINING INC | MERRIMACK | Lead, Silver compounds | 44 lb |
| BRONZE CRAFT CORP | NASHUA | Copper | 37 lb |
| BENCHMARK ELECTRONICS NH DIV | NASHUA | Lead | 34 lb |
| MARMON UTILITY LLC | MILFORD | Copper, Acetophenone | 25 lb |
| PROTO LABS INC. | NASHUA | Chromium | 5 lb |
| COORSTEK IGNITER PRODUCTS | MILFORD | Nickel | 2 lb |
| VHG LABS INC. DBA LGC STANDARDS | MANCHESTER | Lead | 2 lb |
| OSRAM SYLVANIA PRODUCTS INC | HILLSBORO | Lead | 1 lb |
| BROX INDUSTRIES INC | HUDSON | Benzo[g,h,i]perylene | 0 lb |
Underground fuel tanks
EPA's UST Finder records 1,037 tank facilities in Hillsborough: 605 tanks in service and 2,870 closed. 545 fuel releases are on record, of which 134 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Hillsborough as Zone 2, moderate predicted indoor radon (2 to 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 Hillsborough, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- BAKER SITEHUDSON
- BRIDGE STREET/OLD BRIDGE STREET/ATWOOD ROAD AREAPELHAM
- CHOATES SITEHUDSON
- CONCRETE SYSTEMS INCHUDSON
- E. J. ABBOTT MEMORIAL TRUSTWILTON
- FLETCHER'S PAINT STORAGE FACILITYMILFORD
- FLETCHER'S PAINT WORKS & STORAGEMILFORD
- GARABEDIAN LANDFILLPELHAM
- GENDRON JUNKYARDPELHAM
- GRUGNALE WASTE DISP SITEMILFORD
- HENDRIX WIRE & CABLEMILFORD
- HITCHINER MFG CO INCMILFORD
- LONGA DISPOSAL AREAMERRIMACK
- MOHAWK TANNERYNASHUA
- NASHUA AIRPORT AUTHORITYNASHUA
- NASHUA RIVERSIDE STREET LANDFILLNASHUA
- NEW BOSTON AIR FORCE STATIONNEW BOSTON
- NEW ENGLAND POLE AND WOOD TREATING CORPMERRIMACK
- NEW HAMPSHIRE PLATING CO.MERRIMACK
- NORTH HOLLIS RD/SOUTH MERRIMACK RD AREAAMHERST/HOLLIST
- O. K. TOOL COMPANYMILFORD
- QUEEN CITY AVE/ELM ST CVOC AREAMANCHESTER
- QUEEN CITY AVE/WILLOW ST CVOC AREAMANCHESTER
- SAVAGE MUNICIPAL WATER SUPPLYMILFORD
- SOUTH MUNICIPAL WATER SUPPLY WELLPETERBOROUGH
- SOUTHBRIDGE INDUSTRIAL PARK - CENTRAL PORTION OF HOWE DRIVEAMHERST
- SOUTHBRIDGE INDUSTRIAL PARK - SOUTHERN PORTION OF CALDWELL DRIVEAMHERST
- SYLVESTER GILSON ROAD SITENASHUA
- VA MEDICAL CENTER ASH DUMPMANCHESTER
- VA MEDICAL CENTER ASH DUMPMANCHESTER
- WOODBURN DRIVE AREA SITELITCHFIELD
- WOODS WOOLEN MILLHILLSBOROUGH
- WRIGHT AVENUEMERRIMACK