Clean Water Act discharge permit · NPDES CA0001180
MANDALAY GENERATING STATION, Oxnard, CA: NPDES CA0001180 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 148Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
MANDALAY GENERATING STATION, held by NRG California South LP, holds NPDES permit CA0001180, which discharges to Pacific Ocean. EPA’s file records it issued April 26, 2001 and expiring March 10, 2006. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MANDALAY GENERATING STATION |
|---|---|
| Permittee as filed | NRG California South LP |
| NPDES ID | CA0001180 |
| 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 |
| Issued | April 26, 2001 |
| Expiration date | March 10, 2006 |
| Address | Oxnard, CA 93035 |
| Receiving water | PACIFIC OCEAN |
| Subwatershed | McGrath Lake-Frontal Pacific Ocean (HUC 180701030202) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 155Pollutants on file
- 148Under a numeric limit
- 28With a violation of any kind
- 10With 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; the 60 with the most exceedances of 155 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Copper, total recoverable | 5 | 18 | 17 | July 31, 2016 | 594% over the limit |
| Zinc, total recoverable | 5 | 3 | 2 | December 31, 2007 | 91% over the limit |
| Coliform, total general | 1 | 2 | 2 | March 31, 2017 | 15,900% over the limit |
| Solids, total suspended | 9 | 32 | 1 | October 31, 2016 | 16% over the limit |
| Oil and grease | 9 | 32 | 1 | June 30, 2015 | 10% over the limit |
| pH | 8 | 29 | 1 | February 29, 2016 | |
| Temperature, water deg. fahrenheit | 1 | 5 | 1 | June 30, 2009 | 3% over the limit |
| TU Static 48Hr Chronic Macrocystis pyrifera | 1 | 2 | 1 | June 30, 2007 | 11% over the limit |
| Silver total recoverable | 5 | 1 | 1 | June 30, 2006 | 67% over the limit |
| Lead, total recoverable | 5 | 1 | 1 | December 31, 2007 | 22% over the limit |
| Chlorine, free available | 4 | 58 | 0 | ||
| Chlorine, total residual | 2 | 29 | 0 | ||
| Flow, in conduit or thru treatment plant | 5 | 18 | 0 | ||
| Copper, total [as Cu] | 4 | 12 | 0 | ||
| Iron, total [as Fe] | 4 | 12 | 0 | ||
| Copper, dissolved [as Cu] | 1 | 3 | 0 | ||
| Iron, dissolved [as Fe] | 1 | 3 | 0 | ||
| Polychlorinated biphenyls [PCBs], sum of Aroclors | 0 | 3 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 2 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 2 | 0 | ||
| Antimony, total recoverable | 2 | 1 | 0 | ||
| Radioactivity | 1 | 1 | 0 | ||
| Radiation, gross beta | 0 | 1 | 0 | ||
| Tritium, total | 0 | 1 | 0 | ||
| Radium 226 + radium 228, total | 0 | 1 | 0 | ||
| Strontium 90, total | 0 | 1 | 0 | ||
| Uranium, total [in pci/L] | 0 | 1 | 0 | ||
| Radiation, gross alpha | 0 | 1 | 0 | ||
| Arsenic, total recoverable | 5 | 0 | 0 | ||
| Selenium, total recoverable | 5 | 0 | 0 | ||
| Nickel, total recoverable | 5 | 0 | 0 | ||
| Cadmium, total recoverable | 5 | 0 | 0 | ||
| Mercury, total recoverable | 5 | 0 | 0 | ||
| Chromium, hexavalent tot recoverable | 4 | 0 | 0 | ||
| Thallium, total recoverable | 2 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 0 | 0 | ||
| Chromium, total recoverable | 2 | 0 | 0 | ||
| 2-Methyl-4,6-dinitrophenol | 2 | 0 | 0 | ||
| Dichlorobromomethane | 2 | 0 | 0 | ||
| Carbon tetrachloride | 2 | 0 | 0 | ||
| 1,2-Dichloroethane | 2 | 0 | 0 | ||
| Bromoform | 2 | 0 | 0 | ||
| Dibromochloromethane | 2 | 0 | 0 | ||
| Chloroform | 2 | 0 | 0 | ||
| Toluene | 2 | 0 | 0 | ||
| Benzene | 2 | 0 | 0 | ||
| .delta.-BHC | 2 | 0 | 0 | ||
| Acenaphthylene | 2 | 0 | 0 | ||
| Acenaphthene | 2 | 0 | 0 | ||
| Acrolein | 2 | 0 | 0 | ||
| Acrylonitrile | 2 | 0 | 0 | ||
| Anthracene | 2 | 0 | 0 | ||
| Benzo[b]fluoranthene | 2 | 0 | 0 | ||
| Benzo[k]fluoranthene | 2 | 0 | 0 | ||
| Benzo[a]pyrene | 2 | 0 | 0 | ||
| Bis[2-chloroethyl] ether | 2 | 0 | 0 | ||
| Bis[2-chloroethoxy]methane | 2 | 0 | 0 | ||
| Bis[2-chloroisopropyl] ether | 2 | 0 | 0 | ||
| Butyl benzyl phthalate | 2 | 0 | 0 | ||
| Chlorobenzene | 2 | 0 | 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 CA0001180.
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.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.