Pollution Prevention

Illicit Discharges

Illicit discharges are non-stormwater releases to the storm drain system. Common illicit discharges include:

  • Incidental leaks of petroleum fluids from vehicles and equipment
  • Spills, such as paint and chemicals

To report an active release, or an incident occurring outside of business hours, in unincorporated County call the Sheriff's Office at (925) 646-2441 or dial 911. For illicit discharges in unincorporated County during business hours, call 925-313-2000.

To report oil spills to navigable waterways, please notify: National Response Center (US Coast Guard) at 800-424-8802; and CA Emergency Management Agency at 800-852-7550

Illegal Dumping

Illegally dumping includes illegally dumped solid waste, appliances and debris.

Report illegal dumping at 1-800-NO-DUMPING or via the Contra Costa Clean Water webpage.

Illegally dumped material near San Pablo CreekLarge objects in waterways can lead to flooding and downstream erosion. Other items, including hazardous waste and other toxic substances can seep into the ground and contaminate groundwater and surface water.

The County Watershed Program (CWP) holds dischargers responsible for taking corrective action to clean up their releases. According to the County's Enforcement Response Plan, responsible parties may be subject to fines, administrative penalties, property liens and cost recovery.

The CWP is also responsible for overseeing commercial and industrial business inspections within unincorporated Contra Costa County to ensure that their practices do not contribute to stormwater pollution. We work cooperatively with other County departments to make sure businesses remain in compliance with stormwater regulations.

Wood beams stacked for storage

The CWP currently works with two divisions of the Health Services Department:

  •     Environmental Health inspects restaurants and horse boarding facilities for stormwater issues including grease, manure, and trash management
  •      The Hazardous Materials Program inspects industrial and commercial businesses that have hazardous materials onsite and those that generate hazardous waste