Velarion Records

Clean Water Act discharge permit · NPDES CA0055824

CASTAIC POWER PLANT, Castaic, CA: NPDES CA0055824 discharge permit, effluent exceedances, inspections, penalties

CASTAIC POWER PLANT, held by LOS ANGELES, CITY OF, holds NPDES permit CA0055824, which discharges to Pyramid Lake And Castaic Lake. EPA’s file records it issued May 3, 2007 and expiring April 10, 2012. 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 filedCASTAIC POWER PLANT
Permittee as filedLOS ANGELES, CITY OF
NPDES IDCA0055824
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedMay 3, 2007
Expiration dateApril 10, 2012
AddressCastaic, CA 91384
Receiving waterPYRAMID LAKE AND CASTAIC LAKE
Receiving water impaired303(D) Listed
SubwatershedMiddle Castaic Creek (HUC 180701020305)
Other EPA IDs (FRS)RCRA handler CAD980125439

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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 163 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Copper, total recoverable710293June 30, 20261,900% over the limit
BOD, 5-day, 20 deg. C34826August 31, 2024810% over the limit
Turbidity114526March 31, 2026
Solids, total suspended114113March 31, 202699,999% over the limit
Di[2-ethylhexyl] phthalate [DEHP]113211December 31, 20191,733% over the limit
E. coli0139March 31, 202499,999% over the limit
Chloride [as Cl]0119December 31, 202299,999% over the limit
pH12577September 30, 2023
Solids, settleable11264June 30, 20153,400% over the limit
Lead, total recoverable7134September 30, 2015191% over the limit
Oil and grease593June 30, 202310% over the limit
Zinc, total recoverable7112September 30, 2015100% over the limit
Temperature, water deg. fahrenheit6261September 30, 20071% over the limit
Nitrite + Nitrate total [as N]031June 30, 201699,999% over the limit
Flow, in conduit or thru treatment plant12700
Oxygen, dissolved [DO]3240
% Survival Static Renewal 96Hr Acute Pimephales promelas5180
Dieldrin14130
Aldrin5120
Cyanide, total [as CN]5110
Asbestos5110
Arsenic, total recoverable5110
Selenium, total recoverable5110
Thallium, total recoverable5110
Beryllium, total recoverable [as Be]5110
Chromium, hexavalent [as Cr]5110
Chromium, trivalent [as Cr]5110
Nickel, total recoverable5110
Silver total recoverable5110
Cadmium, total recoverable5110
Antimony, total recoverable5110
2-Methyl-4,6-dinitrophenol5110
Carbon tetrachloride5110
1,2-Dichloroethane5110
Bromoform5110
Dibromochloromethane5110
Chloroform5110
Toluene5110
Benzene5110
.delta.-BHC5110
Acenaphthylene5110
Acenaphthene5110
Acrolein5110
Acrylonitrile5110
Anthracene5110
Benzo[b]fluoranthene5110
Benzo[k]fluoranthene5110
Benzo[a]pyrene5110
Bis[2-chloroethyl] ether5110
Bis[2-chloroethoxy]methane5110
Bis[2-chloroisopropyl] ether5110
Butyl benzyl phthalate5110
Chlorobenzene5110
Chrysene5110
Diethyl phthalate5110
Dimethyl phthalate5110
1,2-Diphenylhydrazine5110
Endosulfan sulfate5110
.beta.-Endosulfan5110
.alpha.-Endosulfan5110

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES CA0055824.

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

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, CA0055824.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 CA0055824 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

The Pay Desk is the free weekly executive pay briefing — one company at a time, every number traceable to a public filing.
We’ll email you a link to confirm. Unsubscribe any time.