Velarion Records

Clean Water Act discharge permit · NPDES CA0077895

UC DAVIS WWTP, Davis, CA: NPDES CA0077895 discharge permit, effluent exceedances, inspections, penalties

UC DAVIS WWTP, held by University of California, Davis, holds NPDES permit CA0077895, which discharges to South Fork Of Putah Creek, Arboretum Waterway. EPA’s file records it issued December 5, 2014 and expiring January 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 filedUC DAVIS WWTP
Permittee as filedUniversity of California, Davis
NPDES IDCA0077895
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 5, 2014
Expiration dateJanuary 31, 2020
AddressDavis, CA 95616
Receiving waterSouth Fork of Putah Creek, Arboretum Waterway
SubwatershedPutah Creek-South Fork Putah Creek (HUC 180201620504)
SIC4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same 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 208 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Coliform, total general44311May 31, 202599,999% over the limit
Nitrogen, ammonia total [as N]16766January 31, 2016136% over the limit
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia066June 30, 2026300% over the limit
BOD, 5-day, 20 deg. C121124October 31, 202467% over the limit
Cyanide, total [as CN]2384January 31, 2008246% over the limit
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia8224March 31, 202599,999% over the limit
Nitrite + Nitrate total [as N]2363November 30, 2025610% over the limit
pH4672November 30, 2019
Chlorine, total residual4391November 30, 2013100% over the limit
Iron, total recoverable2331July 31, 201435% over the limit
Turbidity451January 31, 2008
Solids, settleable021September 30, 2005100% over the limit
Solids, total suspended121060
Aluminum, total recoverable2790
Selenium, total recoverable4660
Flow, in conduit or thru treatment plant6540
Specific conductance7380
Solids, total dissolved2310
Mercury, total recoverable8250
Copper, total recoverable2250
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)8180
TU Static Renewal 7-Day Chronic Pimphales promelas8180
Temperature, water deg. fahrenheit2180
Hardness, total [as CaCO3]2180
BOD, 5-day, percent removal2180
Methylmercury2170
Solids, suspended percent removal2170
Phosphorus, total [as P]2160
2,3,7,8-Tetrachlorodibenzo-p-dioxin2140
%Surv Static 96Hr Acute Pimphales Promelas0120
Asbestos290
Dichloromethane080
%Surv Static Renewal 96Hr Oncorhynchus mykiss080
Pyrene270
Arsenic, total recoverable260
Thallium, total recoverable260
Beryllium, total recoverable [as Be]260
Nickel, total recoverable260
Silver total recoverable260
Zinc, total recoverable260
Cadmium, total recoverable260
Lead, total recoverable260
Antimony, total recoverable260
2-Methyl-4,6-dinitrophenol260
Dichlorobromomethane260
Carbon tetrachloride260
1,2-Dichloroethane260
Bromoform260
Chloroform260
Toluene260
Benzene260
.delta.-BHC260
Acenaphthylene260
Acenaphthene260
Acrolein260
Acrylonitrile260
Anthracene260
Benzo[b]fluoranthene260
Benzo[k]fluoranthene260
Benzo[a]pyrene260

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 CA0077895.

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 CA0077895 there.

Nearby on the register

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

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