Isleton operates under a state general NPDES MS4 permit for small communities. Illicit discharges to storm drains, sloughs, and the Sacramento River are prohibited. Construction sites over 1 acre require coverage under the Construction General Permit with a SWPPP.
Stormwater management in Isleton is critical because every drop ultimately reaches the ecologically sensitive Sacramento-San Joaquin Delta. The city participates in the statewide general NPDES MS4 permit Phase II program administered by the State Water Resources Control Board. Illicit discharges including vehicle wash water, concrete washout, pool discharges with chlorine, and landscape chemicals are prohibited from entering storm drains or the river. The Construction General Permit requires a Stormwater Pollution Prevention Plan for any project disturbing 1 acre or more. Industrial operations require separate permit coverage. Residents are encouraged to direct downspouts to vegetation, use integrated pest management, and avoid hosing driveways to reduce runoff pollution to the Delta.
Illicit discharge: state water board fines up to 25,000 dollars per day plus city administrative citation. Construction without SWPPP: stop-work and state enforcement.
See how other cities in Sacramento County handle stormwater management.
See how Isleton's stormwater management rules stack up against other locations.
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