New Hampshire Erosion Control (2026)

Key Facts

Statutes: RSA 485-A:17, 483-B
Shoreland buffer: 250 feet
Required controls: BMPs in approved plan
Agency: NHDES

Full Breakdown

Erosion and sediment control under RSA 485-A:17 applies to construction, grading, and excavation that may discharge sediment to waters of the state. Plans must include silt fencing, stabilized construction entrances, sediment basins, and timely revegetation. Within the Shoreland Water Quality Protection Act jurisdiction (RSA 483-B), additional erosion controls apply within 250 feet of designated waters. NHDES inspects sites and coordinates with the EPA Construction General Permit. Municipalities can adopt complementary erosion ordinances but cannot reduce state standards. Stop-work orders are issued for failed sediment controls causing offsite discharges.

Violations & Penalties

Penalties include daily fines up to $2,000, restoration of impacted resources, suspension of permits, and required corrective action plans.

Frequently Asked Questions

When are erosion controls required in New Hampshire?

Whenever land disturbance could discharge sediment to surface waters, particularly within 250 feet of protected shorelands or for AoT-permitted projects, erosion and sediment controls are mandatory.

Who enforces erosion control rules?

NHDES enforces state erosion control standards, often coordinating with local code enforcement and EPA. Citizens may also report violations to NHDES for investigation.

New Hampshire Erosion and Sediment Control Standards