Worcester County, MA Environmental Rules: Erosion Control (2026)

Erosion and sediment control in Worcester County is governed by MassDEP Stormwater Standard 8 (Erosion/Sediment Control), the EPA 2022 Construction General Permit (CGP), local MS4 construction site bylaws, and the Wetlands Protection Act (MGL c. 131, §40). Any site disturbing 1 or more acres of land requires filing a Notice of Intent under the CGP and preparation of a SWPPP. Sites disturbing less than 1 acre but more than a town's local threshold (typically 10,000 sq ft) still require erosion controls under local bylaws. Worcester County towns including Worcester, Leominster, Shrewsbury, and Westborough have adopted construction site stormwater ordinances requiring: perimeter silt fencing or fiber rolls, stabilized construction entrances (crushed stone pad), catch basin inlet protection, concrete washout areas, and temporary sediment basins for sites 5+ acres. Disturbed areas inactive for 14 or more days must be temporarily stabilized with seeding, mulch, or erosion control blankets per MassDEP standards. Final stabilization requires 70%+ vegetative cover. Winter shutdown stabilization required Nov 15 - April 15 in most Worcester County bylaws. Inspections required weekly and within 24 hours of 0.25+ inch rainfall events.