Oro Loma Sanitary District; Castro Valley Sanitary District

NPDES permit CA0037559 · Minor NON-POTW · effective, expires 2029-05-31 · 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

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

Last period with anything received: none.

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 (132)

OutfallParameterStatisticLimitMonths
EF2CTemperature, water deg. centigradeINST MAX report only Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CNitrogen, ammonia, percent removalAM >= 75 % all year
EF2CpHINST MIN report only Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CpHINST MIN >= 6.5 SU all year
EF2CpHINST MAX report only Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CpHINST MAX <= 8.5 SU all year
EF2CSolids, total suspendedWKLY AVG <= 45 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CSolids, total suspendedWKLY AVG <= 30 mg/L May, Jun, Jul, Aug, Sep
EF2CNitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CNitrogen, ammonia total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep
EF2CNitrite + Nitrate total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep
EF2CNitrogen, inorganic totalDAILY MX report only May, Jun, Jul, Aug, Sep
EF2CCyanide, total [as CN]MO AVG <= 6.3 ug/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CCyanide, total [as CN]DAILY MX <= 12 ug/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CCyanide, total [as CN]DAILY MX report only all year
EF2CArsenic, total recoverableDAILY MX report only all year
EF2CSelenium, total recoverableDAILY MX report only all year
EF2CThallium, total recoverableDAILY MX report only all year
EF2CChromium, hexavalent [as Cr]DAILY MX report only all year
EF2CChromium, total [as Cr]DAILY MX report only all year
EF2CNickel, total recoverableDAILY MX report only all year
EF2CSilver total recoverableDAILY MX report only all year
EF2CZinc, total recoverableDAILY MX report only all year
EF2CCadmium, total recoverableDAILY MX report only all year
EF2CLead, total recoverableDAILY MX report only all year
EF2CCopper, total recoverableMO AVG <= 13 ug/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CCopper, total recoverableDAILY MX <= 18 ug/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CCopper, total recoverableDAILY MX report only all year
EF2CAntimony, total recoverableDAILY MX report only all year
EF2C2-Methyl-4,6-dinitrophenolDAILY MX report only all year
EF2CDichlorobromomethaneDAILY MX report only all year
EF2CCarbon tetrachlorideDAILY MX report only all year
EF2C1,2-DichloroethaneDAILY MX report only all year
EF2CBromoformDAILY MX report only all year
EF2CDibromochloromethaneDAILY MX report only all year
EF2CTolueneDAILY MX report only all year
EF2CBenzeneDAILY MX report only all year
EF2CAcenaphtheneDAILY MX report only all year
EF2CAcroleinDAILY MX report only all year
EF2CAcrylonitrileDAILY MX report only all year
EF2CAnthraceneDAILY MX report only all year
EF2CBenzo[b]fluorantheneDAILY MX report only all year
EF2CBenzo[k]fluorantheneDAILY MX report only all year
EF2CBenzo[a]pyreneDAILY MX report only all year
EF2CBis[2-chloroethyl] etherDAILY MX report only all year
EF2CBis[2-chloroisopropyl] etherDAILY MX report only all year
EF2CButyl benzyl phthalateDAILY MX report only all year
EF2CChlorobenzeneDAILY MX report only all year
EF2CChryseneDAILY MX report only all year
EF2CDiethyl phthalateDAILY MX report only all year
EF2CDimethyl phthalateDAILY MX report only all year
EF2C1,2-DiphenylhydrazineDAILY MX report only all year
EF2CEndosulfan sulfateDAILY MX report only all year
EF2C.beta.-EndosulfanDAILY MX report only all year
EF2C.alpha.-EndosulfanDAILY MX report only all year
EF2CEndrin aldehydeDAILY MX report only all year
EF2CEthylbenzeneDAILY MX report only all year
EF2CFluorantheneDAILY MX report only all year
EF2CFluoreneDAILY MX report only all year
EF2CHexachlorocyclopentadieneDAILY MX report only all year
EF2CHexachlorobutadieneDAILY MX report only all year
EF2CHexachloroethaneDAILY MX report only all year
EF2CIndeno[1,2,3-cd]pyreneDAILY MX report only all year
EF2CIsophoroneDAILY MX report only all year
EF2CMethyl bromide [Bromomethane]DAILY MX report only all year
EF2CMethylene chlorideDAILY MX report only all year
EF2CN-Nitrosodi-N-propylamineDAILY MX report only all year
EF2CN-NitrosodiphenylamineDAILY MX report only all year
EF2CN-Nitrosodimethylamine [NDMA]DAILY MX report only all year
EF2CNitrobenzeneDAILY MX report only all year
EF2CPyreneDAILY MX report only all year
EF2CTetrachloroethyleneDAILY MX report only all year
EF2C1,1-DichloroethyleneDAILY MX report only all year
EF2C1,1,2-TrichloroethaneDAILY MX report only all year
EF2C1,1,2,2-TetrachloroethaneDAILY MX report only all year
EF2CBenzo[a]anthraceneDAILY MX report only all year
EF2C1,2-DichlorobenzeneDAILY MX report only all year
EF2C1,2-DichloropropaneDAILY MX report only all year
EF2Ctrans-1,2-DichloroethyleneDAILY MX report only all year
EF2CDibenz[a,h]anthraceneDAILY MX report only all year
EF2C1,3-DichlorobenzeneDAILY MX report only all year
EF2C1,4-DichlorobenzeneDAILY MX report only all year
EF2C2-ChloronaphthaleneDAILY MX report only all year
EF2C2-ChlorophenolDAILY MX report only all year
EF2C2,4-DichlorophenolDAILY MX report only all year
EF2C2,4-DimethylphenolDAILY MX report only all year
EF2C2,4-DinitrotolueneDAILY MX report only all year
EF2C2,4-DinitrophenolDAILY MX report only all year
EF2C2,4,6-TrichlorophenolDAILY MX report only all year
EF2C3,3'-DichlorobenzidineDAILY MX report only all year
EF2CPCB-1016DAILY MX report only all year
EF2C2,3,7,8-Tetrachlorodibenzo-p-dioxinDAILY MX report only all year
EF2CPhenolDAILY MX report only all year
EF2CPentachlorophenolDAILY MX report only all year
EF2CDi[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
EF2CDi-n-butyl phthalateDAILY MX report only all year
EF2CBenzidineDAILY MX report only all year
EF2CVinyl chlorideDAILY MX report only all year
EF2CTrichloroethyleneDAILY MX report only all year
EF2C4,4'-DDTDAILY MX report only all year
EF2C4,4'-DDDDAILY MX report only all year
EF2C4,4'-DDEDAILY MX report only all year
EF2CAldrinDAILY MX report only all year
EF2C.alpha.-BHCDAILY MX report only all year
EF2C.beta.-BHCDAILY MX report only all year
EF2C.gamma.-BHCDAILY MX report only all year
EF2CChlordane [tech mix. and metabolites]DAILY MX report only all year
EF2CDieldrinDAILY MX report only all year
EF2CEndrinDAILY MX report only all year
EF2CToxapheneDAILY MX report only all year
EF2CHeptachlorDAILY MX report only all year
EF2CHeptachlor epoxideDAILY MX report only all year
EF2CPCB-1221DAILY MX report only all year
EF2CPCB-1232DAILY MX report only all year
EF2CPCB-1242DAILY MX report only all year
EF2CPCB-1248DAILY MX report only all year
EF2CPCB-1254DAILY MX report only all year
EF2CPCB-1260DAILY MX report only all year
EF2CHexachlorobenzeneDAILY MX report only all year
EF2CEnterococciINST MAX <= 110 MPN/100mL all year
EF2CMercury, total recoverableDAILY MX report only all year
EF2C1,3-DichloropropeneDAILY MX report only all year
EF2CBOD, carbonaceous [5 day, 20 C]WKLY AVG <= 40 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
EF2CBOD, carbonaceous [5 day, 20 C]WKLY AVG <= 30 mg/L May, Jun, Jul, Aug, Sep
EFWWDurationDAILY MX report only all year
EFWWFlow, in conduit or thru treatment plantAVERAGE report only all year
EFWWChlorine, total residual1I <= .013 mg/L all year
EFWWVolume, totalDAILY MX report only all year
IN2CNitrogen, total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep
IN2CNitrogen, ammonia total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep
IN2CNitrogen, Kjeldahl, total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep
IN2CNitrite + Nitrate total [as N]DAILY MX report only May, Jun, Jul, Aug, Sep

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states