Merrimack County contains 175 EPA-regulated facilities, 11 of which are currently flagged for significant noncompliance. The county also hosts 0 Superfund sites and 15 TRI chemical reporters. EPA has assessed $218.7k in lifetime penalties and TRI reporters disclosed roughly 43.1k lb of on-site releases. That facility count is well above the New Hampshire state average of 65 per county.
| Facility | City | On-site (lb) | Status |
|---|---|---|---|
| Gsp Merrimack Llc | Bow | 33.7k | Penalties |
| Elektrisola Incorporated | Boscawen | 6.7k | Compliant |
| Kalwall Flat Sheet Division | Bow | 2.5k | Compliant |
| General Electric Aviation | Hooksett | 120 | Compliant |
| Webster Valve | Franklin | 74 | Compliant |
| Pitco Frialator Inc | Bow | 33 | Compliant |
| Pike Industries Inc - Northfield | Northfield | 3 | Compliant |
| Pike Industries, Inc. - Hooksett Hma | Hooksett | 1 | Compliant |
| Facility | City | Penalties | Last Inspected |
|---|---|---|---|
| Contoocook Village Pct-Treatment Plant | Concord | $0 | |
| 12 Tallwood-Utility Room | Londonderry | $0 | |
| Andover Village Dist-Water Treatment Plant | Andover | $0 | |
| Bow Auto Parts, Inc. | Bow | $0 | |
| Warner Village Water District | Warner | $0 | 2025-08-11 |
| Concord Municipal Airport | Concord | $0 | |
| Manchester Water Works - Merrimack River Treatment Plant | Hooksett | $0 | 2025-08-28 |
| Plourde Sand & Gravel | Hooksett | $0 | 2024-07-31 |
| Kent Nutrition Group Inc Fka Blue Seal Feeds Inc | Bow | $0 | 2025-06-26 |
| Pitco Frialator-Pumproom | Gilford | $0 | |
| Henniker Wastewater Treatment Facility | Henniker | $0 | 2024-01-11 |