PG&E – Diablo Canyon
The Central Coast Water Board regulates waste discharges from PG&E’s Diablo Canyon Nuclear Power Plant through Order R3-2026-0001, issued by the Central Coast Water Board via the federal National Pollutant Discharge Elimination System on February 26, 2026. Waste discharges include cooling water, treated process water, desalination brine, stormwater, and treated domestic wastewater discharged into Diablo Cove.
Documents and Links
- February 2026 permit adoption hearing:
- November 2025 draft permits released for public comment
- Archived November 12, 2025 public workshop
- Staff presentation from November 12, 2025 public workshop
- Permitting Actions for Diablo Canyon Nuclear Power Plant Information Sheet (English | Spanish)
- Press releases and media advisories related to Diablo Canyon Power Plant
September 9, 2005 Staff Report and Attachments
September 9, 2005 Staff Report
Attachments
- Independent Scientists' Recommendations to the Regional Board Regarding “Mitigation” for Cooling Water Impacts (Raimondi, Foster, Cailliet), July 2005
- PG&E's comments on the Mitigation Paper, May 2005
- CA Department of Fish and Game comments on the Mitigation Paper, April 2005
- PG&E's Benefits Valuation Study for Diablo Canyon Power Plant, February 2005
- Research on Estimating the Environmental Benefits of Restoration to Mitigate or Avoid Environmental Impacts Caused by California Power Plant Cooling Water intake Structures, Stratus Consulting, October 2004
- The Science of Marine Reserves, PISCO, 2002
Supplemental Sheet for September 9, 2005 Staff Report
Supplemental Sheet Attachments
- California Marine Life Protection Act Initiative , MLPA Master Plan Framework, August 22, 2005. Table of Contents and Executive Summary only. The full report is available on the Department of Fish and Game website.
- Scientific Consenus Paper on Marine Reserves and Marine Protected Areas, 2001.
- Letter from PG&E, August 31, 2005. Comments on Staff's September 9, 2005 Staff Report.
- Review of Independent Scientists' Report With Consideration of Stratus Report Prepared for PG&E by TER, August 31, 2005.
May 14, 2004 Status Report on Resolution of Cooling Water Impacts
July 10, 2003 Hearing - Permit Documents
- Fact Sheet
- Public Notice
- Amendment to Hearing Notice
- 2nd Amendment to Hearing Notice
- Draft NPDES Permit
- Attachment 1: Facility location
- Attachment 2: Discharge descriptions
- Attachment 3: Bathymetry map
- Attachment 4: Entrainment/Impingement Findings
- Attachment 5: Conservation Easement and Consent Judgment
- Attachment 6: Monitoring and Reporting Program
- Attachment 7: Standard Provisions
July 10, 2003 Hearing - Staff Testimony
- RWQCB Staff Testimony
- Regional Board Staff Rebuttal
- Dr. Raimondi Testimony
- Hearing Excerpts List
- Hearing Legal 316(b)
- Hearing Legal Thermal
- Hearing List of Documents
- Attachment 1 - Bathymetry
- Attachment 2 - Tetra Tech Memo re Offshore Discharge
- Attachment 3 - Tetra Tech Alternatives Report
- Attachment 4 - Tetra Tech Memo re Offshore Intake
- Attachment 5 - SAIC Intake Technologies Report
- Attachment 6 - Burns Engineering Alternatives Report
- Attachment 7 - ASA Entrainment Valuation
- Attachment 8 - Stratus Review of ASA Entrainment Valuation
- Attachment 9 - RWQCB Fact Sheet
May 30, 2003 Diablo Canyon Consent Judgment
2000 Staff Reports and Press Release
- July 13, 2000 - Diablo Staff Report
- October 27, 2000 - Diable Staff Report
- October 27, 2000 - Press Release
1966 Agreement Between PG&E and the State of California
Diablo Canyon Nuclear Power Plant
Contact Us
Contact NPDES staff (discharge to surface water):
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