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: December 23, 2021
- Hydromodification and California Wetlands