Auto Repair Shops

It is illegal to allow anything other than rain water to be discharged to a storm drain.

Never allow automotive fluids, residual from used parts, or other chemicals used to be transported to a street, gutter, parking lot, or storm drain. If discharged or disposed of improperly, materials such as hydrocarbons, oil and grease, and heavy metals can be harmful to water quality and creek habitats.

Individuals and businesses that improperly handle and dispose of non-stormwater materials down the storm drain are both subject to civil and criminal prosecution.

Best Practices: 

  • Perform all work activities inside on non-porous concrete floors.
  • Immediately clean up drips or small spills.
  • Clean up wet or oily spots with rags and absorbent, or a designated mop.
  • Pour mop wash water into an inside drain.
  • Separate hazardous wastes and use secondary containment for storage.
  • Properly contain used solvents for offsite removal.
  • Securely seal drums and containers.
  • Wash equipment on-site within an approved parts washer.
  • Use dry cleanup methods (i.e. broom or vacuum). Avoid hosing down or pressure washing work areas.
  • Protect hazardous materials, recyclables, and discarded parts/materials from rain.

Wastewater Requirements

If your shop has a floor drain a Wastewater Discharge Permit may be required. Check with your local municipality for specific requirements.

Are You Ready to Respond to a Spill?

  • Have a written plan.
  • Train employees annually on storm water regulations, spill response, personal safety, and hazardous waste handling and disposal.
  • Have spill cleanup materials onsite.
  • Have Safety Data Sheets for all products used.

Report Spills Here

Cloverdale: (707) 894-2150
Cotati: (707) 665-3605
Healdsburg: (707) 431-7000
Rohnert Park: (707) 588-3300
Santa Rosa: (707) 543-3800,
After Hours: (707) 543-3805
Sebastopol: (707) 823-5331,
After Hours: (707) 829-4400
Ukiah: (707) 463-6288
Unincorporated County of Sonoma: (707) 565-1900
Unincorporated Mendocino County: (707) 234-6679
Windsor: (707) 838-1006,
After Hours: (707) 838-1000

Releasing pollutants into the storm drain system or a waterway is prohibited by local ordinance, state, and federal law.

Have you seen this in your neighborhood?