New Hampshire law
Environmental Laws in New Hampshire.
New Hampshire environmental law combines federal programs (RCRA, CERCLA, CWA, CAA) with state implementation through the New Hampshire Department of Environmental Services (NHDES). New Hampshire administers delegated CWA and CAA programs. Noteworthy state law includes the Shoreland Water Quality Protection Act, the Wetlands Act, the Site Evaluation Committee process for energy-facility siting, and significant PFAS regulation (MCLs for PFOA, PFOS, PFHxS, and PFNA). The state's environmental-rights provisions are part of the general police power (unlike Montana's constitutional clean-environment right).
Last verified: 2026-04-17
State law
Key New Hampshire Statutes
Authorizes NHDES to administer NPDES permitting, drinking-water standards, and shoreland protection under delegated CWA authority.
Protects shorelands within 250 feet of lakes, ponds, rivers, and the ocean. Requires permits for development within the protected zone.
Regulates dredging, filling, and other alterations of wetlands and surface waters. NHDES issues Shoreland and Wetland permits.
Authorizes NHDES to administer air quality programs under delegated CAA authority.
Regulates hazardous waste generation, transport, and disposal under delegated RCRA authority.
Reviews siting of large energy facilities (generating capacity 30+ MW, transmission 100+ kV, and specified gas infrastructure). Provides one-stop-shop permitting with binding decisions.
New Hampshire adopted MCLs for PFOA, PFOS, PFHxS, and PFNA in public drinking water — among the earliest state-level PFAS MCLs in the U.S.
State law
Official Sources
Not Legal Advice
This page summarizes publicly available statutes and rules for informational purposes only. It does not constitute legal advice, and no attorney-client relationship is created by viewing this content. Laws change — always verify with the primary source or consult a licensed attorney in New Hampshire.
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