COLORADO RIVER SEWAGE SYSTEM

NPDES permit AZ0021415 · Major POTW · effective, expires 2026-11-30 · 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.

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

18values over a limit
0required values missing, on 0 form(s)
0of 24 forms filed late

Last period with anything received: 2026-07-31. Most often over: Selenium, total recoverable (18).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (179)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
001BOD, 5-day, 20 deg. CHI WK AV <= 45 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. CMO AVG <= 136 kg/d all year
001BOD, 5-day, 20 deg. CHI WK AV <= 204 kg/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedHI WK AV <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 136 kg/d all year
001Solids, total suspendedHI WK AV <= 204 kg/d all year
001Oil & GreaseDAILY MX report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]ANNL AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Fluoride, total [as F]DAILY MX report only all year
001Arsenic, total recoverableMO AVG <= 10 ug/L all year
001Arsenic, total recoverableDAILY MX <= 20.1 ug/L all year
001Arsenic, total recoverableMO AVG <= .045 kg/d all year
001Arsenic, total recoverableDAILY MX <= .091 kg/d all year
001Selenium, total recoverableMO AVG <= 1.86 ug/L all year
001Selenium, total recoverableDAILY MX <= 2.47 ug/L all year
001Selenium, total recoverableMO AVG <= .0084 kg/d all year
001Selenium, total recoverableDAILY MX <= .0111 kg/d all year
001Boron, total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantHI WK AV report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX report only all year
001E. coliMO AVG <= 126 CFU/100mL all year
001E. coliDAILY MX <= 235 CFU/100mL all year
001Solids, total dissolvedMAXIMUM <= 400 mg/L all year
001Solids, total dissolvedDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasMO MED report only all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX report only all year
001YCyanide, total [as CN]DAILY MX report only all year
001YArsenic, total recoverableDAILY MX report only all year
001YSelenium, total recoverableDAILY MX report only all year
001YThallium, total recoverableDAILY MX report only all year
001YBeryllium, total recoverable [as Be]DAILY MX report only all year
001YNickel, dissolved [as Ni]DAILY MX report only all year
001YNickel, total recoverableDAILY MX report only all year
001YSilver, total [as Ag]DAILY MX report only all year
001YSilver total recoverableDAILY MX report only all year
001YZinc, total recoverableDAILY MX report only all year
001YCadmium, total recoverableDAILY MX report only all year
001YLead, total recoverableDAILY MX report only all year
001YChromium, total recoverableDAILY MX report only all year
001YCopper, total recoverableDAILY MX report only all year
001YAntimony, total recoverableDAILY MX report only all year
001Y2-Methyl-4,6-dinitrophenolDAILY MX report only all year
001YDichlorobromomethaneDAILY MX report only all year
001YCarbon tetrachlorideDAILY MX report only all year
001Y1,2-DichloroethaneDAILY MX report only all year
001YBromoformDAILY MX report only all year
001YDibromochloromethaneDAILY MX report only all year
001YChloroformDAILY MX report only all year
001YTolueneDAILY MX report only all year
001YBenzeneDAILY MX report only all year
001Y.delta.-BHCDAILY MX report only all year
001YAcenaphthyleneDAILY MX report only all year
001YAcenaphtheneDAILY MX report only all year
001YAcroleinDAILY MX report only all year
001YAcrylonitrileDAILY MX report only all year
001YAnthraceneDAILY MX report only all year
001YBenzo[b]fluorantheneDAILY MX report only all year
001YBenzo[k]fluorantheneDAILY MX report only all year
001YBenzo[a]pyreneDAILY MX report only all year
001YBis[2-chloroethyl] etherDAILY MX report only all year
001YBis[2-chloroethoxy]methaneDAILY MX report only all year
001YBis[2-chloroisopropyl] etherDAILY MX report only all year
001YButyl benzyl phthalateDAILY MX report only all year
001YChlorobenzeneDAILY MX report only all year
001YChryseneDAILY MX report only all year
001YDiethyl phthalateDAILY MX report only all year
001YDimethyl phthalateDAILY MX report only all year
001Y1,2-DiphenylhydrazineDAILY MX report only all year
001YEndosulfan sulfateDAILY MX report only all year
001Y.beta.-EndosulfanDAILY MX report only all year
001Y.alpha.-EndosulfanDAILY MX report only all year
001YEndrin aldehydeDAILY MX report only all year
001YEthylbenzeneDAILY MX report only all year
001YFluorantheneDAILY MX report only all year
001YFluoreneDAILY MX report only all year
001YHexachlorocyclopentadieneDAILY MX report only all year
001YHexachlorobutadieneDAILY MX report only all year
001YHexachloroethaneDAILY MX report only all year
001YIndeno[1,2,3-cd]pyreneDAILY MX report only all year
001YIsophoroneDAILY MX report only all year
001YMethyl bromide [Bromomethane]DAILY MX report only all year
001YMethyl chloride [Chloromethane]DAILY MX report only all year
001YMethylene chlorideDAILY MX report only all year
001YN-Nitrosodi-N-propylamineDAILY MX report only all year
001YN-NitrosodiphenylamineDAILY MX report only all year
001YN-Nitrosodimethylamine [NDMA]DAILY MX report only all year
001YNitrobenzeneDAILY MX report only all year
001YPhenanthreneDAILY MX report only all year
001YPyreneDAILY MX report only all year
001YTetrachloroethyleneDAILY MX report only all year
001Y1,1-DichloroethaneDAILY MX report only all year
001Y1,1-DichloroethyleneDAILY MX report only all year
001Y1,1,1-TrichloroethaneDAILY MX report only all year
001Y1,1,2-TrichloroethaneDAILY MX report only all year
001Y1,1,2,2-TetrachloroethaneDAILY MX report only all year
001YBenzo[ghi]peryleneDAILY MX report only all year
001YBenzo[a]anthraceneDAILY MX report only all year
001Y1,2-DichlorobenzeneDAILY MX report only all year
001Y1,2-DichloropropaneDAILY MX report only all year
001Ytrans-1,2-DichloroethyleneDAILY MX report only all year
001Y1,2,4-TrichlorobenzeneDAILY MX report only all year
001YDibenz[a,h]anthraceneDAILY MX report only all year
001Y1,3-DichlorobenzeneDAILY MX report only all year
001Y1,4-DichlorobenzeneDAILY MX report only all year
001Y2-Chloroethyl vinyl ether, [mixed]DAILY MX report only all year
001Y2-ChloronaphthaleneDAILY MX report only all year
001Y2-ChlorophenolDAILY MX report only all year
001Y2-NitrophenolDAILY MX report only all year
001YDi-n-octyl phthalateDAILY MX report only all year
001Y2,4-DichlorophenolDAILY MX report only all year
001Y2,4-DimethylphenolDAILY MX report only all year
001Y2,4-DinitrotolueneDAILY MX report only all year
001Y2,4-DinitrophenolDAILY MX report only all year
001Y2,4,6-TrichlorophenolDAILY MX report only all year
001Y2,6-DinitrotolueneDAILY MX report only all year
001Y3,3'-DichlorobenzidineDAILY MX report only all year
001Y4-Bromophenyl phenyl etherDAILY MX report only all year
001Y4-NitrophenolDAILY MX report only all year
001YPCB-1016DAILY MX report only all year
001Y2,3,7,8-Tetrachlorodibenzo-p-dioxinDAILY MX report only all year
001YPhenolDAILY MX report only all year
001YNaphthaleneDAILY MX report only all year
001YPentachlorophenolDAILY MX report only all year
001YDi[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
001YDi-n-butyl phthalateDAILY MX report only all year
001YBenzidineDAILY MX report only all year
001YVinyl chlorideDAILY MX report only all year
001YTrichloroethyleneDAILY MX report only all year
001Y4,4'-DDTDAILY MX report only all year
001Y4,4'-DDDDAILY MX report only all year
001Y4,4'-DDEDAILY MX report only all year
001YAldrinDAILY MX report only all year
001Y.alpha.-BHCDAILY MX report only all year
001Y.beta.-BHCDAILY MX report only all year
001Y.gamma.-BHCDAILY MX report only all year
001YChlordane [tech mix. and metabolites]DAILY MX report only all year
001YDieldrinDAILY MX report only all year
001YEndrinDAILY MX report only all year
001YToxapheneDAILY MX report only all year
001YHeptachlorDAILY MX report only all year
001YHeptachlor epoxideDAILY MX report only all year
001YPCB-1221DAILY MX report only all year
001YPCB-1232DAILY MX report only all year
001YPCB-1242DAILY MX report only all year
001YPCB-1248DAILY MX report only all year
001YPCB-1254DAILY MX report only all year
001YPCB-1260DAILY MX report only all year
001YHexachlorobenzeneDAILY MX report only all year
001Y4-Chloro-3-methylphenolDAILY MX report only all year
001YMercury, total recoverableDAILY MX report only all year
001Y1,3-DichloropropeneDAILY MX report only all year
001YChloroethaneDAILY MX report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CHI WK AV report only all year
INFBOD, 5-day, 20 deg. CDAILY MX report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CDAILY MX report only all year
INFSolids, total suspendedMO AVG report only all year
INFSolids, total suspendedHI WK AV report only all year
INFSolids, total suspendedDAILY MX report only all year
INFSolids, total suspendedMO AVG report only all year
INFSolids, total suspendedDAILY MX report only all year
INFFlow, in conduit or thru treatment plantMO AVG report only all year
INFFlow, in conduit or thru treatment plantHI WK AV report only all year
INFFlow, in conduit or thru treatment plantDAILY MX report only all year
INFSolids, total dissolvedMO AVG report only all year
INFSolids, total dissolvedDAILY MX report only all year

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