Chemical Manufacturing in New Hampshire
NAICS 325 · NH
New Hampshire is home to Chemical Manufacturing, an industry with 86 establishments counted by the Bureau of Labor Statistics in 2024. Lonza Portsmouth in Portsmouth had 1,574 employees in 2025, more than any other plant listed. This register lists 104 facilities in 42 cities across New Hampshire as of 2026.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Plants in New Hampshire5 FACILITIES
| Facility | City | Employees | Status |
|---|---|---|---|
| Conti Tech Thermopol INC | Somersworth | — | UNVERIFIED |
| Trelleborg Sealing Solutions | Somersworth | — | UNVERIFIED |
| Uraseal INC | Dover | — | UNVERIFIED |
| Simple Life Recycling LLC | Rochester | — | UNVERIFIED |
| Sanctuary Atc | Rochester | — | UNVERIFIED |
All chemical manufacturing nationwide · All manufacturing in New Hampshire