Davis, City of

NPDES permit CA0079049 · Major POTW · effective, expires 2030-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

EPA's record, 2025-09-01 to 2026-08-31

2values over a limit
7required values missing, on 1 form(s)
2of 37 forms filed late

Last period with anything received: 2026-07-31. Most often over: Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia (1), Chlorine, total residual (1).

Reporting

Reports are due about 32 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (247)

OutfallParameterStatisticLimitMonths
EFF1Temperature, water deg. fahrenheitINST MAX report only all year
EFF1TurbidityDAILY MX report only all year
EFF1Specific conductanceDAILY MX report only all year
EFF1Oxygen, dissolved [DO]INST MIN report only all year
EFF1BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
EFF1BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
EFF1pHINST MIN >= 6.5 SU all year
EFF1pHINST MAX <= 8.5 SU all year
EFF1Solids, total suspendedMO AVG <= 10 mg/L all year
EFF1Solids, total suspendedWKLY AVG <= 15 mg/L all year
EFF1Nitrogen, ammonia total [as N]MO AVG <= 1.9 mg/L all year
EFF1Nitrogen, ammonia total [as N]WKLY AVG <= 3.6 mg/L all year
EFF1Carbon, dissolved organic [as C]DAILY MX report only all year
EFF1Cyanide, total [as CN]MO AVG <= 4.3 ug/L all year
EFF1Cyanide, total [as CN]MO AVG <= 31 ug/L all year
EFF1Cyanide, total [as CN]DAILY MX <= 8.5 ug/L all year
EFF1Cyanide, total [as CN]DAILY MX <= 62 ug/L all year
EFF1Hardness, total [as CaCO3]DAILY MX report only all year
EFF1Copper, total recoverableMO AVG <= 6.5 ug/L all year
EFF1Copper, total recoverableMO AVG <= 40 ug/L all year
EFF1Copper, total recoverableDAILY MX <= 12 ug/L all year
EFF1Copper, total recoverableDAILY MX <= 73 ug/L all year
EFF1ChlorpyrifosDAILY MX report only all year
EFF1DiazinonDAILY MX report only all year
EFF1Flow, in conduit or thru treatment plantMO AVG report only all year
EFF1Flow, in conduit or thru treatment plantDAILY MX report only all year
EFF1Chlorine, total residual4A <= .011 mg/L all year
EFF1Chlorine, total residual1I <= .019 mg/L all year
EFF1Diazinon + ChlorpyrifosMO AVG <= 1 ug/L all year
EFF1Diazinon + ChlorpyrifosWKLY AVG <= 1 ug/L all year
EFF1Mercury, total recoverableDAILY MX report only all year
EFF1Mercury, total recoverableANNL TOT <= .46 lb/yr all year
EFF1Coliform, total generalINST MAX <= 240 MPN/100mL all year
EFF1Coliform, total general7C <= 2.2 MPN/100mL all year
EFF1Coliform, total general3E <= 23 MPN/100mL all year
EFF1MethylmercuryDAILY MX report only all year
EFF1BOD, 5-day, percent removalMO AV MN >= 85 % all year
EFF1Solids, suspended percent removalMO AV MN >= 85 % all year
EFF1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
EFF1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO MED <= 0 pass=0;fail=1 all year
EFF1Chronic Mthd, Survival Endpt %Effect, Reprod Endpt Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 50 % effect all year
EFF2Temperature, water deg. centigradeDAILY MX report only all year
EFF2Temperature, water deg. fahrenheitINST MAX report only all year
EFF2TurbidityDAILY MX report only all year
EFF2Specific conductanceDAILY MX report only all year
EFF2Specific conductanceDAILY MX report only all year
EFF2Oxygen, dissolved [DO]INST MIN report only all year
EFF2BOD, 5-day, 20 deg. CDAILY MX report only all year
EFF2pHINST MIN report only all year
EFF2pHDAILY MX report only all year
EFF2pHINST MAX report only all year
EFF2Solids, total suspendedDAILY MX report only all year
EFF2Nitrogen, ammonia total [as N]DAILY MX report only all year
EFF2Nitrogen, ammonia total [as N]DAILY MX report only all year
EFF2Nitrogen, nitrite total [as N]DAILY MX report only all year
EFF2Nitrogen, nitrate total [as N]DAILY MX report only all year
EFF2Phosphorus, total [as P]DAILY MX report only all year
EFF2Carbon, dissolved organic [as C]DAILY MX report only all year
EFF2Carbon, dissolved organic [as C]DAILY MX report only all year
EFF2Cyanide, total [as CN]DAILY MX report only all year
EFF2Cyanide, total [as CN]DAILY MX report only all year
EFF2Sulfide, total [as S]DAILY MX report only all year
EFF2Hardness, total [as CaCO3]DAILY MX report only all year
EFF2Hardness, total [as CaCO3]DAILY MX report only all year
EFF2Chloride [as Cl]DAILY MX report only all year
EFF2Sulfate, total [as SO4]DAILY MX report only all year
EFF2AsbestosDAILY MX report only all year
EFF2Fluoride, total [as F]DAILY MX report only all year
EFF2Arsenic, total recoverableDAILY MX report only all year
EFF2Iron, total recoverableDAILY MX report only all year
EFF2Selenium, total recoverableDAILY MX report only all year
EFF2Thallium, total recoverableDAILY MX report only all year
EFF2Beryllium, total recoverable [as Be]DAILY MX report only all year
EFF2Boron, total recoverableDAILY MX report only all year
EFF2Barium, total recoverableDAILY MX report only all year
EFF2Nickel, total recoverableDAILY MX report only all year
EFF2Silver total recoverableDAILY MX report only all year
EFF2Zinc, total recoverableDAILY MX report only all year
EFF2Aluminum, total recoverableDAILY MX report only all year
EFF2Cadmium, total recoverableDAILY MX report only all year
EFF2Lead, total recoverableDAILY MX report only all year
EFF2Chromium, total recoverableDAILY MX report only all year
EFF2Copper, total recoverableDAILY MX report only all year
EFF2Copper, total recoverableDAILY MX report only all year
EFF2Molybdenum, total recoverableDAILY MX report only all year
EFF2Antimony, total recoverableDAILY MX report only all year
EFF22-Methyl-4,6-dinitrophenolDAILY MX report only all year
EFF2TributyltinDAILY MX report only all year
EFF2DiquatDAILY MX report only all year
EFF2Manganese, total recoverableDAILY MX report only all year
EFF2Methyl tert-butyl ether [MTBE]DAILY MX report only all year
EFF2DinosebDAILY MX report only all year
EFF2DichlorobromomethaneDAILY MX report only all year
EFF2Carbon tetrachlorideDAILY MX report only all year
EFF21,2-DichloroethaneDAILY MX report only all year
EFF2BromoformDAILY MX report only all year
EFF2DibromochloromethaneDAILY MX report only all year
EFF2ChloroformDAILY MX report only all year
EFF2TolueneDAILY MX report only all year
EFF2BenzeneDAILY MX report only all year
EFF2.delta.-BHCDAILY MX report only all year
EFF2AcenaphthyleneDAILY MX report only all year
EFF2AcenaphtheneDAILY MX report only all year
EFF2AcroleinDAILY MX report only all year
EFF2AcrylonitrileDAILY MX report only all year
EFF2AnthraceneDAILY MX report only all year
EFF2Benzo[b]fluorantheneDAILY MX report only all year
EFF2Benzo[k]fluorantheneDAILY MX report only all year
EFF2Benzo[a]pyreneDAILY MX report only all year
EFF2Bis[2-chloroethyl] etherDAILY MX report only all year
EFF2Bis[2-chloroethoxy]methaneDAILY MX report only all year
EFF2Bis[2-chloroisopropyl] etherDAILY MX report only all year
EFF2Butyl benzyl phthalateDAILY MX report only all year
EFF2ChlorobenzeneDAILY MX report only all year
EFF2ChryseneDAILY MX report only all year
EFF2Diethyl phthalateDAILY MX report only all year
EFF2Dimethyl phthalateDAILY MX report only all year
EFF21,2-DiphenylhydrazineDAILY MX report only all year
EFF2Endosulfan sulfateDAILY MX report only all year
EFF2.beta.-EndosulfanDAILY MX report only all year
EFF2.alpha.-EndosulfanDAILY MX report only all year
EFF2Endrin aldehydeDAILY MX report only all year
EFF2EthylbenzeneDAILY MX report only all year
EFF2FluorantheneDAILY MX report only all year
EFF2FluoreneDAILY MX report only all year
EFF2HexachlorocyclopentadieneDAILY MX report only all year
EFF2HexachlorobutadieneDAILY MX report only all year
EFF2HexachloroethaneDAILY MX report only all year
EFF2Indeno[1,2,3-cd]pyreneDAILY MX report only all year
EFF2IsophoroneDAILY MX report only all year
EFF2Methyl bromide [Bromomethane]DAILY MX report only all year
EFF2Methyl chloride [Chloromethane]DAILY MX report only all year
EFF2Methylene chlorideDAILY MX report only all year
EFF2N-Nitrosodi-N-propylamineDAILY MX report only all year
EFF2N-NitrosodiphenylamineDAILY MX report only all year
EFF2N-Nitrosodimethylamine [NDMA]DAILY MX report only all year
EFF2NitrobenzeneDAILY MX report only all year
EFF2PhenanthreneDAILY MX report only all year
EFF2PyreneDAILY MX report only all year
EFF2TetrachloroethyleneDAILY MX report only all year
EFF2TrichlorofluoromethaneDAILY MX report only all year
EFF21,1-DichloroethaneDAILY MX report only all year
EFF21,1-DichloroethyleneDAILY MX report only all year
EFF21,1,1-TrichloroethaneDAILY MX report only all year
EFF21,1,2-TrichloroethaneDAILY MX report only all year
EFF21,1,2,2-TetrachloroethaneDAILY MX report only all year
EFF2Benzo[ghi]peryleneDAILY MX report only all year
EFF2Benzo[a]anthraceneDAILY MX report only all year
EFF21,2-DichlorobenzeneDAILY MX report only all year
EFF21,2-DichloropropaneDAILY MX report only all year
EFF2trans-1,2-DichloroethyleneDAILY MX report only all year
EFF21,2,4-TrichlorobenzeneDAILY MX report only all year
EFF2Dibenz[a,h]anthraceneDAILY MX report only all year
EFF21,3-DichlorobenzeneDAILY MX report only all year
EFF21,4-DichlorobenzeneDAILY MX report only all year
EFF22-Chloroethyl vinyl ether, [mixed]DAILY MX report only all year
EFF22-ChloronaphthaleneDAILY MX report only all year
EFF22-ChlorophenolDAILY MX report only all year
EFF22-NitrophenolDAILY MX report only all year
EFF2Di-n-octyl phthalateDAILY MX report only all year
EFF22,4-DichlorophenolDAILY MX report only all year
EFF22,4-DimethylphenolDAILY MX report only all year
EFF22,4-DinitrotolueneDAILY MX report only all year
EFF22,4-DinitrophenolDAILY MX report only all year
EFF22,4,6-TrichlorophenolDAILY MX report only all year
EFF22,6-DinitrotolueneDAILY MX report only all year
EFF23,3'-DichlorobenzidineDAILY MX report only all year
EFF24-Bromophenyl phenyl etherDAILY MX report only all year
EFF24-Chlorophenyl phenyl etherDAILY MX report only all year
EFF24-NitrophenolDAILY MX report only all year
EFF2PCB-1016DAILY MX report only all year
EFF22,3,7,8-Tetrachlorodibenzo-p-dioxinDAILY MX report only all year
EFF2PhenolDAILY MX report only all year
EFF2NaphthaleneDAILY MX report only all year
EFF2BoleroDAILY MX report only all year
EFF2Surfactants [MBAS]DAILY MX report only all year
EFF2DalaponDAILY MX report only all year
EFF2Bentazon, totalDAILY MX report only all year
EFF2OxamylDAILY MX report only all year
EFF2ChlorpyrifosDAILY MX report only all year
EFF2ChlorpyrifosDAILY MX report only all year
EFF2PentachlorophenolDAILY MX report only all year
EFF2AtrazineDAILY MX report only all year
EFF2SimazineDAILY MX report only all year
EFF2Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
EFF2Di-n-butyl phthalateDAILY MX report only all year
EFF2BenzidineDAILY MX report only all year
EFF2AlachlorDAILY MX report only all year
EFF2Vinyl chlorideDAILY MX report only all year
EFF2TrichloroethyleneDAILY MX report only all year
EFF24,4'-DDTDAILY MX report only all year
EFF24,4'-DDDDAILY MX report only all year
EFF24,4'-DDEDAILY MX report only all year
EFF2AldrinDAILY MX report only all year
EFF2.alpha.-BHCDAILY MX report only all year
EFF2.beta.-BHCDAILY MX report only all year
EFF2.gamma.-BHCDAILY MX report only all year
EFF2Chlordane [tech mix. and metabolites]DAILY MX report only all year
EFF2DieldrinDAILY MX report only all year
EFF2EndrinDAILY MX report only all year
EFF2ToxapheneDAILY MX report only all year
EFF2HeptachlorDAILY MX report only all year
EFF2Heptachlor epoxideDAILY MX report only all year
EFF2MethoxychlorDAILY MX report only all year
EFF2PCB-1221DAILY MX report only all year
EFF2PCB-1232DAILY MX report only all year
EFF2PCB-1242DAILY MX report only all year
EFF2PCB-1248DAILY MX report only all year
EFF2PCB-1254DAILY MX report only all year
EFF2PCB-1260DAILY MX report only all year
EFF2DiazinonDAILY MX report only all year
EFF2DiazinonDAILY MX report only all year
EFF2HexachlorobenzeneDAILY MX report only all year
EFF2PicloramDAILY MX report only all year
EFF22,4-Dichlorophenoxyacetic acidDAILY MX report only all year
EFF21,2-Dibromo-3-chloropropaneDAILY MX report only all year
EFF2MolinateDAILY MX report only all year
EFF2Flow, in conduit or thru treatment plantMO AVG report only all year
EFF2Flow, in conduit or thru treatment plantDAILY MX report only all year
EFF2Chlorine, total residualDAILY MX report only all year
EFF2Di[2-ethylhexyl] adipateDAILY MX report only all year
EFF2EndothallDAILY MX report only all year
EFF24-Chloro-3-methylphenolDAILY MX report only all year
EFF2Solids, total dissolvedDAILY MX report only all year
EFF2Mercury, total recoverableDAILY MX report only all year
EFF2Mercury, total recoverableDAILY MX report only all year
EFF2Mercury, total recoverableANNL TOT <= 75 g/yr all year
EFF2Coliform, total generalDAILY MX report only all year
EFF21,3-DichloropropeneDAILY MX report only all year
EFF21,2,3-TrichloropropaneDAILY MX report only all year
EFF2Ethylene dibromideDAILY MX report only all year
EFF21,1,2-Trichloro-1,2,2-trifluoroethaneDAILY MX report only all year
EFF22,4,5-TPDAILY MX report only all year
EFF2MethylmercuryDAILY MX report only all year
EFF2MethylmercuryDAILY MX report only all year
EFF2BOD, 5-day, percent removalMO AV MN >= 85 % all year
EFF2Solids, suspended percent removalMO AV MN >= 85 % all year
EFF2CarbofuranDAILY MX report only all year
EFF2Xylene [mix of m+o+p]DAILY MX report only all year
EFF2StyreneDAILY MX report only all year
EFF2ChloroethaneDAILY MX report only all year
INF1BOD, 5-day, 20 deg. CMO AVG report only all year
INF1BOD, 5-day, 20 deg. CDAILY MX report only all year
INF1Solids, total suspendedMO AVG report only all year
INF1Solids, total suspendedDAILY MX report only all year
INF1Flow, in conduit or thru treatment plantMO AVG report only all year
INF1Flow, in conduit or thru treatment plantDAILY MX report only all year

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