The Stormwater Pollution Prevention Program works to protect local creeks and the bay from pollutants associated with stormwater runoff. Stormwater runoff occurs when rain falls on impermeable surfaces such as roofs and streets and collects in storm drains before flowing into local creeks. Unlike waste water entering the sanitary sewer from sinks and toilets, stormwater runoff collected in the storm drain system is not treated before being discharged to a creek. Pollutants commonly found in stormwater runoff are soil, pesticides, litter, pet waste, and automotive products such as oil and grease.
The three creeks receiving stormwater runoff from the City of Sonoma are Nathanson Creek, Sonoma Creek, and Fryer Creek.
- EPA -- Clean Water Act Overview
- EPA -- NPDES Program Overview
- Sonoma's Current NPDES Permit for Stormwater
- San Francisco Bay Regional Water Quality Control Board Municipal Stormwater Overview
- Storm Drain Maps for Sonoma (supported browsers include Internet Explorer and Firefox)
- City of Sonoma Storm Drain Master Plan
Report a Spill or Illegal Dumping in a Creek or Storm Drain
- To report a hazardous materials spill, discharge, or other emergency, please call 911.
- To report a spill from a sewer or a sanitary sewer overflow, please call Sonoma County Water Agency at (707) 523-1070.
- To report misuse or spills of pesticides, please call the Sonoma County Agricultural Commissioner at (707) 565-2371.
- To report all other spills or illegal dumping into a creek or storm drain, please call the City of Sonoma Environmental Compliance Analyst at (707) 933-2245.
- Learn more about common spills and discharges that affect water quality