Environmental Rules in Westminster, CO (2026)
4 verified environmental rules for Westminster, Colorado, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Westminster requires erosion and sediment controls on any land-disturbing activity and bans illicit discharges into its storm sewer system under Code Chapter 11, backing the rules with civil penalties up to $1,000 per violation per day.
Westminster Stormwater Quality Regulations
Significant RestrictionsWestminster Municipal Code §§ 8-11-2(A), 8-11-8(A)
8-11-2. - General Requirements. (A)Any person who undertakes or causes to be undertaken any activity that involves disturbance of the surface of land shall ensure that soil erosion, sedimentation, increased pollutant loads and changed water flow characteristics resulting from the activity are controlled, so as to minimize pollution of receiving waters. The requirements of this Chapter are minim...
Erosion Control
Westminster requires erosion and sediment controls on every land-disturbing project under Chapter 11 of Title VIII. Any grading, excavation or ground disturbance covering an acre or more needs a land disturbance permit and an approved stormwater management plan before work starts, and temporary best management practices like silt fence and inlet filters must go in before dirt moves.
Westminster Erosion and Sediment Control Rules
Some RestrictionsWestminster Municipal Code § 8-11-2
(A)Any person who undertakes or causes to be undertaken any activity that involves disturbance of the surface of land shall ensure that soil erosion, sedimentation, increased pollutant loads and changed water flow characteristics resulting from the activity are controlled, so as to minimize pollution of receiving waters. The requirements of this Chapter are minimum standards and a person's comp...
Flood Zones
Westminster requires a floodplain development permit for any construction in a special flood hazard area, bars storage of flammable or buoyant materials in a floodplain, and prohibits new residential lots platted entirely within the 100-year floodplain, under Section 11-8-13.
Floodplain Development Permit Rules in Westminster
Significant RestrictionsWestminster Municipal Code Section 11-8-13
(2)No development, use, fill, construction or alteration on or over any portion of a designated floodplain shall be permitted that would cause or result in any of the following:(a)The storage or processing of materials that in times of flooding are buoyant, flammable, explosive or otherwise potentially injurious to human, animal or plant life...(5)No new residential lot shall be platted if loca...
Flood Elevation Requirements
Westminster requires new construction in a mapped floodplain to elevate the lowest floor one foot above the base flood elevation, and three feet above grade in AO zones, under Section 11-8-13(B) and the freeboard definition in Section 11-8-2.
Base Flood Elevation Freeboard Rule in Westminster
Some RestrictionsWestminster Municipal Code Sections 11-8-2 and 11-8-13(B)(2)
Freeboard shall mean the vertical distance in feet above a predicted water surface elevation intended to provide a margin of safety to compensate for unknown factors that could contribute to flood heights greater than the height calculated for a selected size flood... (B)Residential Structures:(2)In floodplain areas in which the base flood elevation (BFE) is known, all new construction and subs...
Looking for Adams County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Westminster city rules.
Environmental Rules in Adams County →