The following EPA publications provide information about washing cars:
- Wash Your Car the Right Way (PDF)
- When You’re Washing Your Car in the Driveway, Remember You’re Not Just Washing Your Car in the Driveway (PDF)
Additionally, EPA’s WaterSense Program provides guidance on how to improve water efficiency at home.
For information about wastewater permits, contact the National Pollution Discharge Elimination System (NPDES) permitting program