Weber County, UT Environmental Rules: Stormwater Management (2026)

Weber County Code § 40-2-2 makes it unlawful for any person to cause or allow an illicit discharge to the storm sewer system, then lists the discharges exempt from that ban: flows under a valid NPDES storm discharge permit that comply with its terms, water line flushing by a city, the county, or a service provider, sprinkled landscape irrigation or lawn watering, residential car washing using biodegradable detergent, natural riparian or wetland flows, natural groundwater flows, air conditioning condensation approved by the county engineer, firefighting or emergency management discharges, and foundation, footing, or crawl space/basement pump discharges approved in writing by the county engineer.

Section 40-2-1 separately bars obstructing the storm sewer system's flow or covering a drain inlet, and § 40-2-3 bars storing, keeping or depositing any pollutant or hazardous material in a manner likely to let it reach the storm sewer system. Beyond the discharge ban, § 40-2-4 requires anyone beginning new construction or redevelopment in the unincorporated county to obtain a storm sewer discharge permit before construction starts, submitting a completed application, a best-management-practices plan meeting § 40-2-5, and a maintenance plan, all reviewed by the county's stormwater manager, whose decision can be appealed to the director of stormwater management.

1 cubic feet per second per acre. The findings in § 40-1-1 explain the rationale: uncontrolled runoff causes erosion, hinders emergency access, carries oil, grease, chemicals and heavy metals into receiving waters, and the county funds its system through a storm sewer service fee under Chapter 40-1.