Hillsborough County contains 117 EPA-regulated facilities, 10 of which are currently flagged for significant noncompliance. The county also hosts 6 Superfund sites and 39 TRI chemical reporters. EPA has assessed $13.9M in lifetime penalties and TRI reporters disclosed roughly 23.8k lb of on-site releases. That facility count is well above the New Hampshire state average of 65 per county.
| Site | City | Status |
|---|---|---|
| New Hampshire Plating Co | Merrimack | Construction complete |
| Mohawk Tannery | Nashua | Proposed for NPL |
| Sylvester | Nashua | Ready for anticipated reuse |
| South Municipal Water Supply Well | Peterborough | Construction complete |
| Fletcher S Paint Works Storage | Milford | Ready for anticipated reuse |
| Savage Municipal Water Supply | Milford | Construction complete |
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Vibracoustic Na Lp | Manchester | 13.4k | Compliant |
| 141 Burke Street Site Improvements | Nashua | 6.6k | Compliant |
| Upaco Adhesive | Nashua | 1.5k | Compliant |
| Parker Hannifin Corp Chomerics Div | Hudson | 1.2k | Compliant |
| Teradyne Circuits | Nashua | 366 | Compliant |
| Infinitium Electric Inc | Nashua | 250 | Compliant |
| Bae Sys Information & Electronics Sys Intergration | Nashua | 234 | Compliant |
| Hitchiner Manufacturing - Wilton Road | Milford | 108 | Compliant |
| Morgan Advanced Ceramics Inc | Hudson | 102 | Compliant |
| The Bronze Craft Corporation | Nashua | 16 | Compliant |
| Marmon Utility Llc | Milford | 15 | Compliant |
| Cri Transport Llc | Merrimack | 12 | Compliant |
| Protolabs | Nashua | 5 | Compliant |
| New Hampshire Ball Bearings | Peterborough | 5 | Compliant |
| Epe Corp | Manchester | 3 | Compliant |
| Saint-Gobain Ceramics (Igniter Products) | Milford | 2 | Compliant |
| Osram Sylvania Prods Inc | Hillsboro | 1 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Saint Gobain Performance Plastics | Merrimack | $60.0k | 2024-08-21 |
| Manchester Wastewater Treatment Facility | Manchester | $0 | 2025-09-24 |
| Nashua Wwtp | Nashua | $0 | 2025-08-04 |
| Nashua Wastewater Treatment Facility | Nashua | $0 | |
| Nashua Airport - Boire Field - Rehabilitate Ramps Golf & Foxtrot | Nashua | $0 | 2023-04-11 |
| Pilgrim Foods | Greenville | $0 | 2026-02-09 |
| Greenville W W T F | Greenville | $0 | 2023-12-06 |
| Haynes Mulch | Weare | $0 | |
| Monadnock Paper Mills, Inc. | Bennington | $0 | 2025-07-22 |
| Davidson Pit | Wilton | $0 |