Calleguas Municipal Water District

NPDES permit CA0064521 · Major NON-POTW · expired, expires 2024-07-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2024-07-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

3values over a limit
0required values missing, on 0 form(s)
0of 16 forms filed late

Last period with anything received: 2026-06-30. Most often over: Coliform, total general (2), Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d A affinis (1).

Reporting

Reports are due about 32 days after each monitoring period ends (the most common figure among CA permits in EPA's filings — check your permit).

Limits in force (276)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitINST MAX report only all year
001Temperature, water deg. fahrenheitINST MAX report only all year
001Temperature, water deg. fahrenheitINST MAX report only all year
001Temperature, water deg. fahrenheitINST MAX report only all year
001TurbidityMO AVG <= 75 NTU all year
001TurbidityMO AVG <= 75 NTU all year
001TurbidityWKLY AVG <= 100 NTU all year
001TurbidityWKLY AVG <= 100 NTU all year
001TurbidityINST MAX <= 225 NTU all year
001TurbidityINST MAX <= 225 NTU all year
001Oxygen, dissolved [DO]INST MIN report only all year
001Oxygen, dissolved [DO]INST MIN report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 4800 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG <= 4800 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 7200 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 7200 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001pHMAXIMUM <= 9 SU all year
001SalinityDAILY MX report only all year
001SalinityDAILY MX report only all year
001Solids, total suspendedMO AVG <= 60 mg/L all year
001Solids, total suspendedMO AVG <= 60 mg/L all year
001Solids, total suspendedMO AVG <= 9600 lb/d all year
001Solids, total suspendedMO AVG <= 9600 lb/d all year
001Solids, settleableMO AVG <= 1 mL/L all year
001Solids, settleableMO AVG <= 1 mL/L all year
001Solids, settleableWKLY AVG <= 1.5 mL/L all year
001Solids, settleableWKLY AVG <= 1.5 mL/L all year
001Solids, settleableINST MAX <= 3 mL/L all year
001Solids, settleableINST MAX <= 3 mL/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Selenium, total recoverableDAILY MX report only all year
001Selenium, total recoverableDAILY MX report only all year
001Thallium, total recoverableDAILY MX report only all year
001Thallium, total recoverableDAILY MX report only all year
001Beryllium, total recoverable [as Be]DAILY MX report only all year
001Beryllium, total recoverable [as Be]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, trivalent [as Cr]DAILY MX report only all year
001Chromium, trivalent [as Cr]DAILY MX report only all year
001Nickel, total recoverableDAILY MX report only all year
001Nickel, total recoverableDAILY MX report only all year
001Silver total recoverableDAILY MX report only all year
001Silver total recoverableDAILY MX report only all year
001Zinc, total recoverableDAILY MX report only all year
001Zinc, total recoverableDAILY MX report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Cadmium, total recoverableDAILY MX report only all year
001Lead, total recoverableDAILY MX report only all year
001Lead, total recoverableDAILY MX report only all year
001Copper, total recoverableDAILY MX report only all year
001Copper, total recoverableDAILY MX report only all year
001Antimony, total recoverableDAILY MX report only all year
001Antimony, total recoverableDAILY MX report only all year
001Radiation, gross betaDAILY MX report only all year
001Radiation, gross betaDAILY MX report only all year
001Oil and greaseMO AVG <= 25 mg/L all year
001Oil and greaseMO AVG <= 25 mg/L all year
001Oil and greaseWKLY AVG <= 40 mg/L all year
001Oil and greaseWKLY AVG <= 40 mg/L all year
001Oil and greaseINST MAX <= 75 mg/L all year
001Oil and greaseINST MAX <= 75 mg/L all year
001Oil and greaseMO AVG <= 4000 lb/d all year
001Oil and greaseMO AVG <= 4000 lb/d all year
001Oil and greaseWKLY AVG <= 6400 lb/d all year
001Oil and greaseWKLY AVG <= 6400 lb/d all year
0012-Methyl-4,6-dinitrophenolDAILY MX report only all year
0012-Methyl-4,6-dinitrophenolDAILY MX report only all year
001TributyltinDAILY MX report only all year
001TributyltinDAILY MX report only all year
001Tritium, totalDAILY MX report only all year
001Tritium, totalDAILY MX report only all year
001Radium 226 + radium 228, totalDAILY MX report only all year
001Radium 226 + radium 228, totalDAILY MX report only all year
001Strontium 90, totalDAILY MX report only all year
001Strontium 90, totalDAILY MX report only all year
001Polynuclear Aromatic Hydrocarbons [PAHs]DAILY MX report only all year
001Polynuclear Aromatic Hydrocarbons [PAHs]DAILY MX report only all year
001Uranium, total [in pci/L]DAILY MX report only all year
001Uranium, total [in pci/L]DAILY MX report only all year
001DichlorobromomethaneDAILY MX report only all year
001DichlorobromomethaneDAILY MX report only all year
001Carbon tetrachlorideDAILY MX report only all year
001Carbon tetrachlorideDAILY MX report only all year
0011,2-DichloroethaneDAILY MX report only all year
0011,2-DichloroethaneDAILY MX report only all year
001DibromochloromethaneDAILY MX report only all year
001DibromochloromethaneDAILY MX report only all year
001ChloroformDAILY MX report only all year
001ChloroformDAILY MX report only all year
001TolueneDAILY MX report only all year
001TolueneDAILY MX report only all year
001BenzeneDAILY MX report only all year
001BenzeneDAILY MX report only all year
001AcroleinDAILY MX report only all year
001AcroleinDAILY MX report only all year
001AcrylonitrileDAILY MX report only all year
001AcrylonitrileDAILY MX report only all year
001Bis[2-chloroethyl] etherDAILY MX report only all year
001Bis[2-chloroethyl] etherDAILY MX report only all year
001Bis[2-chloroethoxy]methaneDAILY MX report only all year
001Bis[2-chloroethoxy]methaneDAILY MX report only all year
001Bis[2-chloroisopropyl] etherDAILY MX report only all year
001Bis[2-chloroisopropyl] etherDAILY MX report only all year
001ChlorobenzeneDAILY MX report only all year
001ChlorobenzeneDAILY MX report only all year
001Diethyl phthalateDAILY MX report only all year
001Diethyl phthalateDAILY MX report only all year
001Dimethyl phthalateDAILY MX report only all year
001Dimethyl phthalateDAILY MX report only all year
0011,2-DiphenylhydrazineDAILY MX report only all year
0011,2-DiphenylhydrazineDAILY MX report only all year
001EthylbenzeneDAILY MX report only all year
001EthylbenzeneDAILY MX report only all year
001FluorantheneDAILY MX report only all year
001FluorantheneDAILY MX report only all year
001HexachlorocyclopentadieneDAILY MX report only all year
001HexachlorocyclopentadieneDAILY MX report only all year
001HexachlorobutadieneDAILY MX report only all year
001HexachlorobutadieneDAILY MX report only all year
001HexachloroethaneDAILY MX report only all year
001HexachloroethaneDAILY MX report only all year
001IsophoroneDAILY MX report only all year
001IsophoroneDAILY MX report only all year
001Methylene chlorideDAILY MX report only all year
001Methylene chlorideDAILY MX report only all year
001N-Nitrosodi-N-propylamineDAILY MX report only all year
001N-Nitrosodi-N-propylamineDAILY MX report only all year
001N-NitrosodiphenylamineDAILY MX report only all year
001N-NitrosodiphenylamineDAILY MX report only all year
001N-Nitrosodimethylamine [NDMA]DAILY MX report only all year
001N-Nitrosodimethylamine [NDMA]DAILY MX report only all year
001NitrobenzeneDAILY MX report only all year
001NitrobenzeneDAILY MX report only all year
001TetrachloroethyleneDAILY MX report only all year
001TetrachloroethyleneDAILY MX report only all year
0011,1-DichloroethyleneDAILY MX report only all year
0011,1-DichloroethyleneDAILY MX report only all year
0011,1,1-TrichloroethaneDAILY MX report only all year
0011,1,1-TrichloroethaneDAILY MX report only all year
0011,1,2-TrichloroethaneDAILY MX report only all year
0011,1,2-TrichloroethaneDAILY MX report only all year
0011,1,2,2-TetrachloroethaneDAILY MX report only all year
0011,1,2,2-TetrachloroethaneDAILY MX report only all year
0011,4-DichlorobenzeneDAILY MX report only all year
0011,4-DichlorobenzeneDAILY MX report only all year
0012,4-DinitrotolueneDAILY MX report only all year
0012,4-DinitrotolueneDAILY MX report only all year
0012,4-DinitrophenolDAILY MX report only all year
0012,4-DinitrophenolDAILY MX report only all year
0012,4,6-TrichlorophenolDAILY MX report only all year
0012,4,6-TrichlorophenolDAILY MX report only all year
0013,3'-DichlorobenzidineDAILY MX report only all year
0013,3'-DichlorobenzidineDAILY MX report only all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
001Di-n-butyl phthalateDAILY MX report only all year
001Di-n-butyl phthalateDAILY MX report only all year
001BenzidineMO AVG <= .005 ug/L all year
001BenzidineMO AVG <= .005 ug/L all year
001BenzidineMO AVG <= .0008 lb/d all year
001BenzidineMO AVG <= .0008 lb/d all year
001Vinyl chlorideDAILY MX report only all year
001Vinyl chlorideDAILY MX report only all year
001TrichloroethyleneDAILY MX report only all year
001TrichloroethyleneDAILY MX report only all year
001AldrinDAILY MX report only all year
001AldrinDAILY MX report only all year
001Chlordane [tech mix. and metabolites]MO AVG <= .0017 ug/L all year
001Chlordane [tech mix. and metabolites]MO AVG <= .0017 ug/L all year
001Chlordane [tech mix. and metabolites]MO AVG <= .00027 lb/d all year
001Chlordane [tech mix. and metabolites]MO AVG <= .00027 lb/d all year
001DDT/DDD/DDE, sum of p,p' & o,p' isomersDAILY MX report only all year
001DDT/DDD/DDE, sum of p,p' & o,p' isomersDAILY MX report only all year
001DieldrinDAILY MX report only all year
001DieldrinDAILY MX report only all year
001Endosulfan, totalDAILY MX report only all year
001Endosulfan, totalDAILY MX report only all year
001EndrinDAILY MX report only all year
001EndrinDAILY MX report only all year
001ToxapheneMO AVG <= .015 ug/L all year
001ToxapheneMO AVG <= .015 ug/L all year
001ToxapheneMO AVG <= .0024 lb/d all year
001ToxapheneMO AVG <= .0024 lb/d all year
001HeptachlorDAILY MX report only all year
001HeptachlorDAILY MX report only all year
001Heptachlor epoxideDAILY MX report only all year
001Heptachlor epoxideDAILY MX report only all year
001Polychlorinated biphenyls [PCBs]MO AVG <= .0014 ug/L all year
001Polychlorinated biphenyls [PCBs]MO AVG <= .0014 ug/L all year
001Polychlorinated biphenyls [PCBs]MO AVG <= .00022 lb/d all year
001Polychlorinated biphenyls [PCBs]MO AVG <= .00022 lb/d all year
001HexachlorobenzeneMO AVG <= .015 ug/L all year
001HexachlorobenzeneMO AVG <= .015 ug/L all year
001HexachlorobenzeneMO AVG <= .0024 lb/d all year
001HexachlorobenzeneMO AVG <= .0024 lb/d all year
001Flow, in conduit or thru treatment plantTOTAL report only all year
001Flow, in conduit or thru treatment plantTOTAL report only all year
001Chlorine, total residual6A <= 150 ug/L all year
001Chlorine, total residual6A <= 150 ug/L all year
001Chlorine, total residualDAILY MX <= 580 ug/L all year
001Chlorine, total residualDAILY MX <= 580 ug/L all year
001Chlorine, total residualINST MAX <= 4400 ug/L all year
001Chlorine, total residualINST MAX <= 4400 ug/L all year
001Chlorine, total residual6A <= 24 lb/d all year
001Chlorine, total residual6A <= 24 lb/d all year
001Chlorine, total residualDAILY MX <= 92 lb/d all year
001Chlorine, total residualDAILY MX <= 92 lb/d all year
001EnterococciGEO MEAN <= 30 CFU/100mL all year
001EnterococciGEO MEAN <= 30 CFU/100mL all year
001Enterococci9C <= 110 CFU/100mL all year
001Enterococci9C <= 110 CFU/100mL all year
001Mercury, total recoverableDAILY MX report only all year
001Mercury, total recoverableDAILY MX report only all year
001Phenols, chlorinatedDAILY MX report only all year
001Phenols, chlorinatedDAILY MX report only all year
001Coliform, fecal general30DA GM <= 200 CFU/100mL all year
001Coliform, fecal general30DA GM <= 200 CFU/100mL all year
001Coliform, fecal generalSINGSAMP <= 400 CFU/100mL all year
001Coliform, fecal generalSINGSAMP <= 400 CFU/100mL all year
001Coliform, total generalMD <= 70 CFU/100mL all year
001Coliform, total generalMD <= 70 CFU/100mL all year
001Coliform, total general9C <= 230 CFU/100mL all year
001Coliform, total general9C <= 230 CFU/100mL all year
0011,3-DichloropropeneDAILY MX report only all year
0011,3-DichloropropeneDAILY MX report only all year
001Hexachlorocyclohexane, totalDAILY MX report only all year
001Hexachlorocyclohexane, totalDAILY MX report only all year
001Phenolic compounds, unchlorinatedDAILY MX report only all year
001Phenolic compounds, unchlorinatedDAILY MX report only all year
001HalomethanesDAILY MX report only all year
001HalomethanesDAILY MX report only all year
001DichlorobenzeneDAILY MX report only all year
001DichlorobenzeneDAILY MX report only all year
001Radiation, gross alphaDAILY MX report only all year
001Radiation, gross alphaDAILY MX report only all year
001TCDD equivalentsMO AVG <= .00000028 ug/L all year
001TCDD equivalentsMO AVG <= .00000028 ug/L all year
001TCDD equivalentsMO AVG <= .045 ulb/d all year
001TCDD equivalentsMO AVG <= .045 ulb/d all year
001Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d A affinisVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d A affinisVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d A affinisMAXIMUM report only all year
001Chronic Mthd, Survival Endpt %Effect, Growth Endpt Median TSTcHo R/nR Pass/Fail, StatR7d A affinisMAXIMUM report only all year
001Chronic Mthd Larval Development Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr H rufescensVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Larval Development Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr H rufescensVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Larval Development Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr H rufescensMAXIMUM report only all year
001Chronic Mthd Larval Development Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr H rufescensMAXIMUM report only all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min S purpuratusVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min S purpuratusVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min S purpuratusMAXIMUM report only all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min S purpuratusMAXIMUM report only all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min D excentricusVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min D excentricusVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min D excentricusMAXIMUM report only all year
001Chronic Mthd Fertilization Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static40min D excentricusMAXIMUM report only all year
001Chronic Mthd Germination Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Germination Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaVALUE < 1 pass=0;fail=1 all year
001Chronic Mthd Germination Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaMAXIMUM report only all year
001Chronic Mthd Germination Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaMAXIMUM report only all year
001Chronic Mthd Germ Tube Length Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaVALUE <= 1 pass=0;fail=1 all year
001Chronic Mthd Germ Tube Length Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaVALUE <= 1 pass=0;fail=1 all year
001Chronic Mthd Germ Tube Length Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaMAXIMUM report only all year
001Chronic Mthd Germ Tube Length Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static48hr M pyriferaMAXIMUM report only all year

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