401 Water Quality Certification and Waste Discharge Requirements Program
Wetland and Riparian Area Protection
The Clean Water Act (CWA) Section 401 Certification and Waste Discharge Requirements Program for dredge and fill activities is an important tool for regulating hydrologic modification projects in addition to other projects which involve dredge and fill.
- Applications for Clean Water Act Section 401 Water Quality Certifications
- Public Notices
- Water Quality Certification Actions Recently Issued Updated: January 8, 2019
- Hydromodification and California Wetlands
Updated: January 8, 2019
401 Certification Contacts:
- LB Nye (TMDLs & Standards - Unit Chief):
Phone: (213) 576-6785 - Valerie Carrillo Zara (Lead):
Phone: (213) 576-6759 - Dana Cole:
Phone (213) 576-5733