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Clean Water Act discharge permit · NPDES CA0022888

UKIAH WWTP, Ukiah, CA: NPDES CA0022888 discharge permit, effluent exceedances, inspections, penalties

UKIAH WWTP, held by Ukiah, City of, holds NPDES permit CA0022888, which discharges to Russian River. EPA’s file records it issued August 23, 2012 and expiring September 30, 2017. 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 filedUKIAH WWTP
Permittee as filedUkiah, City of
NPDES IDCA0022888
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
IssuedAugust 23, 2012
Expiration dateSeptember 30, 2017
AddressUkiah, CA 95482
Receiving waterRussian River
Receiving water impaired303(D) Listed
SubwatershedMorrison Creek-Russian River (HUC 180101100405)

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 169 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Dichlorobromomethane33222May 31, 20161,673% over the limit
BOD, 5-day, 20 deg. C62711October 31, 2019105% over the limit
Copper, total recoverable31611January 31, 2023100% over the limit
Chlorine, total residual3209February 29, 202499,999% over the limit
Coliform, total general2297January 31, 20205,809% over the limit
Cyanide, total [as CN]374April 30, 201935% over the limit
Nitrogen, ammonia total [as N]473December 31, 201947% over the limit
%Surv Static Renewal 96Hr Oncorhynchus mykiss242December 31, 2024100% over the limit
Turbidity491April 30, 2019
Nitrogen, nitrate total [as N]241May 31, 201210% over the limit
Solids, settleable041February 29, 200899,999% over the limit
Solids, total suspended6160
%Surv Static 96Hr Acute Oncorhynchus Mykiss0140
Flow, in conduit or thru treatment plant4100
Bromoform270
Dibromochloromethane260
96Hr Acute Ceriodaphn. Dubia % Srv260
Chloroform250
Effluent dilution ratio250
Toxic Units Static Renewal 96Hr Acute Ceriodaphnia dubia050
pH240
Di[2-ethylhexyl] phthalate [DEHP]240
Oxygen, dissolved [DO]140
Ammonia, unionized040
Arsenic, total recoverable230
Selenium, total recoverable230
Thallium, total recoverable230
Beryllium, total recoverable [as Be]230
Chromium, trivalent [as Cr]230
Silver total recoverable230
Cadmium, total recoverable230
Lead, total recoverable230
Antimony, total recoverable230
Toluene230
Mercury, total recoverable230
Phosphorus, total [as P]130
BOD, 5-day, percent removal130
Solids, suspended percent removal130
TU Static Renewal 96Hr Acute Oncorhynchus Mykiss030
2,3,7,8-Tetrachlorodibenzo-p-dioxin320
Nitrogen, ammonia, tot unionized [as N]220
Chromium, hexavalent [as Cr]220
Nickel, total recoverable220
Zinc, total recoverable220
2-Methyl-4,6-dinitrophenol220
Carbon tetrachloride220
1,2-Dichloroethane220
Benzene220
.delta.-BHC220
Acenaphthylene220
Acenaphthene220
Acrolein220
Acrylonitrile220
Anthracene220
Benzo[b]fluoranthene220
Benzo[k]fluoranthene220
Benzo[a]pyrene220
Bis[2-chloroethyl] ether220
Bis[2-chloroethoxy]methane220
Bis[2-chloroisopropyl] ether220

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 CA0022888.

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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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES CA0022888 for UKIAH WWTP in Ukiah, CA, held by Ukiah, City of, which discharges to the Russian River and lists the Morrison Creek-Russian River subwatershed (HUC 180101100405). The page shows 169 pollutants on file, 153 under a numeric limit, 167 with a violation of any kind, and 11 with an effluent exceedance, with the permit status listed as administratively continued.