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Clean Water Act discharge permit · NPDES CA0047856

CALIFORNIA MEN'S COLONY WWTP, San Luis Obispo, CA: NPDES CA0047856 discharge permit, effluent exceedances, inspections, penalties

CALIFORNIA MEN'S COLONY WWTP, held by California Department of Corrections and Rehabilitation, holds NPDES permit CA0047856, which discharges to Chorro Creek. EPA’s file records it issued December 6, 2012 and expiring January 25, 2018. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedCALIFORNIA MEN'S COLONY WWTP
Permittee as filedCalifornia Department of Corrections and Rehabilitation
NPDES IDCA0047856
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedDecember 6, 2012
Expiration dateJanuary 25, 2018
AddressSan Luis Obispo, CA 93401
Receiving waterChorro Creek
SubwatershedChorro Creek (HUC 180600060502)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

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 176 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, total [as N]212480February 28, 20251,300% over the limit
Dichlorobromomethane27356October 31, 20245,507% over the limit
Dibromochloromethane27154October 31, 20242,625% over the limit
Copper, total recoverable26043May 31, 202699,999% over the limit
pH29842January 31, 2025
Oxygen, dissolved [DO]15123November 30, 201395% over the limit
Di[2-ethylhexyl] phthalate [DEHP]23121September 30, 2025628% over the limit
Chlorine, total residual14917December 31, 201399,999% over the limit
Coliform, total general26616January 31, 202199,999% over the limit
Sulfate, total [as SO4]2159June 30, 201644% over the limit
Oil and grease41308March 31, 20191,168% over the limit
Solids, settleable2688January 31, 202599,999% over the limit
BOD, 5-day, 20 deg. C71836February 28, 2017340% over the limit
Solids, total suspended71665May 31, 20133,670% over the limit
Phthalate esters174September 30, 2025199,900% over the limit
TU Static Renewal 96Hr Acute Pimphales promelas033September 30, 2004233% over the limit
Turbidity2591December 31, 2020
Sulfate041March 31, 20054% over the limit
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia231December 31, 200999,999% over the limit
TU Static Renewal 96Hr Acute Oncorhynchus Mykiss011December 31, 200337% over the limit
Flow, in conduit or thru treatment plant2930
Nitrogen, nitrate total [as N]2410
Nitrogen, ammonia total [as N]2400
Chlorine usage2400
BOD, 5-day, percent removal1320
Solids, suspended percent removal1320
Temperature, water deg. fahrenheit1290
Nitrogen, Kjeldahl, total [as N]2260
Nitrogen, nitrite total [as N]1210
Hardness, total [as CaCO3]1160
Chloride [as Cl]1160
Solids, total dissolved1160
Phosphorous, total organic [as P]0150
Phosphate, ortho, dissolved [as P]1130
Sodium, total recoverable1130
Phosphate, total, color method [as P]1130
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)260
TU Static Renewal 7-Day Chronic Pimphales promelas250
% Survival Flow Through 96Hr Acute Pimephales promelas240
Boron, total recoverable140
Sodium, total [as Na]030
Toxaphene120
Bentazon, total020
1,2,3-Trichloropropane020
%Surv Static 96Hr Acute Pimphales Promelas020
Cyanide, total [as CN]110
Arsenic, total recoverable110
Cobalt, total recoverable110
Iron, total recoverable110
Selenium, total recoverable110
Thallium, total recoverable110
Beryllium, total recoverable [as Be]110
Chromium, hexavalent [as Cr]110
Chromium, trivalent [as Cr]110
Nickel, total recoverable110
Silver total recoverable110
Zinc, total recoverable110
Cadmium, total recoverable110
Lead, total recoverable110
Vanadium, total recoverable110

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 CA0047856.

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 CA0047856 there.

Nearby on the register

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