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Clean Water Act discharge permit · NPDES CA0001139

ALAMITOS GENERATING STATION, Long Beach, CA: NPDES CA0001139 discharge permit, effluent exceedances, inspections, penalties

ALAMITOS GENERATING STATION, held by AES Alamitos LLC, holds NPDES permit CA0001139, which discharges to San Gabriel River Estuary, Los Cerritos Channel. EPA’s file records it issued September 10, 2015 and expiring December 31, 2020. 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 filedALAMITOS GENERATING STATION
Permittee as filedAES Alamitos LLC
NPDES IDCA0001139
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
ProgramIndustrial stormwater
IssuedSeptember 10, 2015
Expiration dateDecember 31, 2020
AddressLong Beach, CA 90803
Receiving waterSan Gabriel River Estuary, Los Cerritos Channel
Receiving water impaired303(D) Listed
SubwatershedCoyote Creek-San Gabriel River (HUC 180701060606)
SIC4911 – Electric Services
Other EPA IDs (FRS)RCRA handler CAD009694795; ICIS-AIR source CASCA0000603700005

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

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 171 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
pH2012469January 31, 2023
Temperature, water deg. fahrenheit138718September 30, 2023419% over the limit
Solids, settleable22313March 31, 201814,233% over the limit
Copper, total recoverable395512June 30, 2026788% over the limit
Nickel, total recoverable15338June 30, 20253,544% over the limit
Solids, total suspended14397March 31, 2026115% over the limit
BOD, 5-day, 20 deg. C4186April 30, 20132,477% over the limit
Chronic Mthd Germination Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyrifera055June 30, 202582% over the limit
Enterococci1484September 30, 201799,999% over the limit
Oil and grease11463August 31, 200975% over the limit
Chlorine, free available6433November 30, 20203,300% over the limit
Coliform, fecal general9213December 31, 20147,900% over the limit
Pass/Fail Static Renewal 7 Day Chronic Atherinops affinis682December 31, 2017
Chlorine, total residual9201December 31, 200413% over the limit
Nitrogen, ammonia total [as N]12171June 30, 2022373% over the limit
TU Static 48Hr Chronic Macrocystis pyrifera051March 31, 201545% over the limit
%Effect Static Renewal 7 Day Chronic Atherinops affinis341September 30, 2017100% over the limit
Flow, in conduit or thru treatment plant20410
Di[2-ethylhexyl] phthalate [DEHP]15270
Indeno[1,2,3-cd]pyrene9270
Benzo[a]anthracene9270
Dibenz[a,h]anthracene9270
2,3,7,8-Tetrachlorodibenzo-p-dioxin9270
2-Methyl-4,6-dinitrophenol6270
Dichlorobromomethane6270
Carbon tetrachloride6270
1,2-Dichloroethane6270
Bromoform6270
Dibromochloromethane6270
Chloroform6270
Toluene6270
Benzene6270
.delta.-BHC6270
Acenaphthylene6270
Acenaphthene6270
Acrolein6270
Acrylonitrile6270
Anthracene6270
Benzo[b]fluoranthene6270
Benzo[k]fluoranthene6270
Benzo[a]pyrene6270
Bis[2-chloroethyl] ether6270
Bis[2-chloroethoxy]methane6270
Bis[2-chloroisopropyl] ether6270
Butyl benzyl phthalate6270
Chlorobenzene6270
Chrysene6270
Diethyl phthalate6270
Dimethyl phthalate6270
1,2-Diphenylhydrazine6270
Endosulfan sulfate6270
.beta.-Endosulfan6270
.alpha.-Endosulfan6270
Endrin aldehyde6270
Ethylbenzene6270
Fluoranthene6270
Fluorene6270
Hexachlorocyclopentadiene6270
Hexachlorobutadiene6270
Hexachloroethane6270

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 CA0001139.

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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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 CA0001139 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This public-records page covers NPDES permit CA0001139 for ALAMITOS GENERATING STATION in Long Beach, CA, held by AES Alamitos LLC, with a status of administratively continued and a Major Discharger class. The figures listed are 164 for the discharger class and 17 pollutants under a numeric limit, with 17 pollutants showing an effluent exceedance.