Construction sites in Mountain View must install erosion control BMPs year-round, with enhanced measures October 1 through April 30. Sites over 1 acre need a Construction General Permit.
Mountain View enforces erosion and sediment control under the MRP 3.0 stormwater permit and the California Construction General Permit (Order 2022-0057-DWQ) for sites disturbing one acre or more. All construction sites regardless of size must install BMPs including silt fences, fiber rolls at site perimeters, stabilized construction entrances, storm drain inlet protection, and covers for stockpiled materials. The rainy season October 1 through April 30 triggers enhanced requirements: all disturbed soil must be protected by erosion control blankets, hydroseed, or equivalent cover before forecasted rain events. SWPPP (Stormwater Pollution Prevention Plan) documents must be maintained on site and updated after rain. Fines for uncontrolled sediment discharge reach 10,000 dollars per day under the Clean Water Act.
Contact your local code enforcement office for specific penalty information.
Mountain View, CA
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Side-by-side rule comparisons with other cities in Santa Clara County.
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