Clean Water Act discharge permit · NPDES CA0003751
PG AND E DIABLO CANYON POWER PLANT, Avila Beach, CA: NPDES CA0003751 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 12Pollutants with an effluent exceedance
PG AND E DIABLO CANYON POWER PLANT, held by PACIFIC GAS and ELECTRIC COMPANY, holds NPDES permit CA0003751, which discharges to Pacific Ocean. EPA’s file records it issued May 11, 1990 and expiring July 1, 1995. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | PG AND E DIABLO CANYON POWER PLANT |
|---|---|
| Permittee as filed | PACIFIC GAS and ELECTRIC COMPANY |
| NPDES ID | CA0003751 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | May 11, 1990 |
| Expiration date | July 1, 1995 |
| Address | Avila Beach, CA 93424 |
| Receiving water | PACIFIC OCEAN |
| Subwatershed | Islay Creek-Frontal Pacific Ocean (HUC 180600060504) |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler CAD983639741 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 29Pollutants on file
- 28Under a numeric limit
- 29With a violation of any kind
- 12With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Oil & Grease | 42 | 206 | 6 | March 31, 2017 | 99,999% over the limit |
| Temperature, water deg. fahrenheit | 5 | 102 | 6 | December 31, 2016 | 246% over the limit |
| Solids, total suspended | 26 | 256 | 4 | January 31, 2009 | 120% over the limit |
| Toxicity, final conc toxicity units | 2 | 10 | 4 | December 31, 2021 | 285% over the limit |
| Silver, total [as Ag] | 7 | 47 | 2 | December 31, 1997 | 245% over the limit |
| Solids, settleable | 2 | 36 | 2 | June 30, 2007 | 33% over the limit |
| Chlorinated phenols | 3 | 17 | 2 | December 31, 1997 | 1,000% over the limit |
| Iron, total [as Fe] | 10 | 151 | 1 | April 30, 2004 | 350% over the limit |
| Mercury, total [as Hg] | 7 | 42 | 1 | December 31, 2020 | 85% over the limit |
| Phenolic compounds, unchlorinated | 3 | 16 | 1 | December 31, 1997 | 33% over the limit |
| Chlorine, total residual | 2 | 13 | 1 | February 29, 2008 | 4% over the limit |
| pH change [range] | 0 | 1 | 1 | June 30, 2026 | |
| Copper, total [as Cu] | 17 | 206 | 0 | ||
| pH | 12 | 76 | 0 | ||
| Chromium, total [as Cr] | 7 | 63 | 0 | ||
| Zinc, total [as Zn] | 7 | 55 | 0 | ||
| Cadmium, total [as Cd] | 7 | 45 | 0 | ||
| Lead, total [as Pb] | 7 | 44 | 0 | ||
| Nickel, total [as Ni] | 7 | 37 | 0 | ||
| Nitrogen, ammonia total [as N] | 3 | 19 | 0 | ||
| Cyanide, total [as CN] | 3 | 15 | 0 | ||
| Arsenic, total [as As] | 3 | 15 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 12 | 0 | ||
| Titanium, total [as Ti] | 2 | 10 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 2 | 10 | 0 | ||
| Chlorine usage | 1 | 9 | 0 | ||
| Boron, total [as B] | 1 | 5 | 0 | ||
| Lithium, total [as Li] | 1 | 5 | 0 | ||
| Hydrazine | 1 | 5 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES CA0003751.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID CA0003751 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.