Residents    

Report an Illicit DischargeSediment discharge from drain into street.
It is illegal to release anything other than stormwater which is free of pollutants to the maximum extent practicable to a stormwater conveyance system! Stormwater conveyance systems include streets, curbs and gutter, storm drains, and ditches. See Non-Stormwater Discharges below to learn about specific exemptions to these discharge prohibitions.

You may call the Stormwater Hotline for the local jurisdiction to report an illict discharge or a potential illicit discharge. Please provide a detailed account of the incident (i.e. date, time, location, responsible party, nature of the incident) when you call to report an illicit discharge. 

Stormwater Hotlines

American Canyon     707-647-4550  
Napa 707-257-9600
Yountville 707-944-8851
St. Helena 707-968-2658 or 967-2850 after hours
Calistoga 707-942-2828
Napa County (unincorporated) 707-299-1799

Non-Stormwater Discharges
The following discharges are exempt from the illicit discharge prohibitions.  

  1. Water line flushing and other discharges from potable water sources
  2. Irrigation and lawn watering
  3. Rising ground waters or springs
  4. Passive foundation and footing drains
  5. Water from crawl space pumps and basement pumps
  6. Air conditioning condensate
  7. Noncommercial vehicle washing*
  8. Natural flows from riparian habitats and wetlands
  9. Dechlorinated swimming pool discharges**
  10. Flows from fire suppression activities, including fire hydrant flows
  11. Waters not otherwise containing wastes as defined in California Water Code Section 13050(d) and California Health and Safety Code Section 25117
  12. Diverted stream flows
  13. Uncontaminated ground water infiltration (as defined at 40 Code of Federal Regulation Section 35.2005(b)(20) to separate storm sewers
  14. Uncontaminated pumped ground water

* Local agencies also allow occasional non-profit car wash fund raisers. Contact your local stormwater agency for more information.

** Prior to draining a swimming pool to the street you must call the local stormwater agency for an encroachment permit. Please refer to the Pollution Prevention for Pools, Spas, and Fountains for more information on BMPs and discharge options.

Generally, all other discharges are prohibited. Please refer to the BMPs and FAQs found throughout this website and the local stormwater ordinances for more information on the local discharge requirements.