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Clean Water Act discharge permit · NPDES CA0006254

MOSS LANDING POWER PLANT, Moss Landing, CA: NPDES CA0006254 discharge permit, effluent exceedances, inspections, penalties

MOSS LANDING POWER PLANT, held by DUKE ENERGY MOSS LANDING LLC, holds NPDES permit CA0006254, which discharges to Pacific Ocean. EPA’s file records it issued October 27, 2000 and expiring October 27, 2005. 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 filedMOSS LANDING POWER PLANT
Permittee as filedDUKE ENERGY MOSS LANDING LLC
NPDES IDCA0006254
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
IssuedOctober 27, 2000
Expiration dateOctober 27, 2005
AddressMoss Landing, CA 95039
Receiving waterPACIFIC OCEAN
SubwatershedElkhorn Slough (HUC 180600150301)
Other EPA IDs (FRS)RCRA handler CAD983639758; ICIS-AIR source CAMBU0000605300002

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.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended79739March 31, 2026887% over the limit
pH52612May 31, 2025
Chlorine, total residual1147March 31, 2021225% over the limit
Polychlorinated biphenyls [PCBs]1223December 31, 20242,147,483,650% over the limit
Temperature, water deg. fahrenheit6163February 28, 2025267% over the limit
Chlorine, free available093March 31, 202150% over the limit
Cyanide, total [as CN]083March 31, 202344% over the limit
TU Static 48Hr Chronic Haliotis rufescens153September 30, 201724% over the limit
Oil and grease141242October 31, 202413% over the limit
Chromium, hexavalent tot recoverable222June 30, 200593% over the limit
TCDD equivalents022December 31, 20242,147,483,650% over the limit
Nickel, total recoverable2121June 30, 2010125% over the limit
Zinc, total recoverable221June 30, 20055% over the limit
Arsenic, total recoverable211December 31, 20182,220% over the limit
Selenium, total recoverable211December 31, 200451% over the limit
Beryllium, total recoverable [as Be]011December 31, 2025235% over the limit
Copper, total recoverable6420
Iron, total recoverable3260
Flow, in conduit or thru treatment plant14160
Solids, settleable560
Endosulfan, total060
Flow, total050
Nitrogen, ammonia total [as N]230
Mercury, total recoverable220
Phenols, chlorinated220
Phenolic compounds, unchlorinated220
Bis[2-chloroisopropyl] ether020
TU Static 48Hr Chronic Macrocystis pyrifera020
TU Static 48Hr Chronic Crassostrea gigas020
Static 48Hr Chronic Mytilis Species020
TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia)020
TU Static Renewal 7-Day Chronic Holmesimysis costata020
TU Static Renewal 7-Day Chronic Menidia beryllina020
Toxic Units Static Renewal 7-Day Chronic Atherinops affinis020
Static 20Min Chronic Dendraster excentricus020
Silver total recoverable210
Lead, total recoverable210
Oxygen, dissolved [DO]110
Chromium, total recoverable010
Cadmium, total recoverable200

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 CA0006254.

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 CA0006254 there.

Nearby on the register

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

What this page shows

This public-records page covers NPDES permit CA0006254 for the Moss Landing Power Plant in Moss Landing, CA, held by Duke Energy Moss Landing LLC and discharging to the Pacific Ocean, with its status listed as administratively continued. The page reports 24 for the major discharger class, 16 pollutants under a numeric limit, and 16 pollutants with an effluent exceedance, along with an issue date of October 27, 2000 and an expiration date of October 27, 2005.