Pima County - Regional Wastewater Reclamation Department

NPDES permit AZ0020001 · Major POTW · effective, expires 2027-05-15 · 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

1values over a limit
0required values missing, on 0 form(s)
0of 29 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among AZ permits in EPA's filings — check your permit).

Limits in force (220)

OutfallParameterStatisticLimitMonths
003Temperature, water deg. centigradeMO AVG report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003Temperature, water deg. centigradeDAILY MX report only all year
003Oxygen, dissolved [DO]DAILY MX report only all year
003BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
003BOD, 5-day, 20 deg. CDAILY MX report only all year
003BOD, 5-day, 20 deg. CMO AVG <= 5700 kg/d all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 8500 kg/d all year
003pHMINIMUM >= 6.5 SU all year
003pHMINIMUM report only all year
003pHMAXIMUM <= 9 SU all year
003pHMAXIMUM report only all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedWKLY AVG <= 45 mg/L all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspendedMO AVG <= 5700 kg/d all year
003Solids, total suspendedWKLY AVG <= 8500 kg/d all year
003Oil & GreaseMO AVG <= 10 mg/L all year
003Oil & GreaseDAILY MX <= 15 mg/L all year
003Nitrogen, ammonia total [as N]MO AVG <= 1 Ratio all year
003Nitrogen, ammonia total [as N]DAILY MX <= 2 Ratio all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
003Nitrite + Nitrate total [as N]DAILY MX report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Cyanide, total [as CN]MO AVG <= 7.9 ug/L all year
003Cyanide, total [as CN]DAILY MX <= 16 ug/L all year
003Cyanide, total [as CN]DAILY MX report only all year
003Cyanide, total [as CN]MO AVG <= 1.5 kg/d all year
003Cyanide, total [as CN]DAILY MX <= 3 kg/d all year
003Sulfide, total [as S]MO AVG report only all year
003Sulfide, total [as S]DAILY MX report only all year
003Sulfide, total [as S]DAILY MX report only all year
003Hardness, total [as CaCO3]DAILY MX report only all year
003Fluoride, total [as F]DAILY MX report only all year
003Arsenic, total recoverableDAILY MX report only all year
003Iron, total recoverableDAILY MX report only all year
003Selenium, total recoverableMO AVG <= 2 ug/L all year
003Selenium, total recoverableDAILY MX report only all year
003Selenium, total recoverableDAILY MX <= 3 ug/L all year
003Selenium, total recoverableMO AVG <= .3 kg/d all year
003Selenium, total recoverableDAILY MX <= .6 kg/d all year
003Thallium, total recoverableDAILY MX report only all year
003Beryllium, total recoverable [as Be]DAILY MX report only all year
003Boron, total recoverableDAILY MX report only all year
003Barium, total recoverableDAILY MX report only all year
003Chromium, total [as Cr]DAILY MX report only all year
003Nickel, total recoverableDAILY MX report only all year
003Silver total recoverableDAILY MX report only all year
003Zinc, total recoverableDAILY MX report only all year
003Cadmium, total recoverableDAILY MX report only all year
003Lead, total recoverableDAILY MX report only all year
003Copper, total recoverableDAILY MX report only all year
003Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
003Antimony, total recoverableDAILY MX report only all year
0032-Methyl-4,6-dinitrophenolDAILY MX report only all year
003TributyltinDAILY MX report only all year
003DiquatDAILY MX report only all year
003Manganese, total recoverableDAILY MX report only all year
003Uranium, total as U3O8DAILY MX report only all year
003DinosebDAILY MX report only all year
003DichlorobromomethaneDAILY MX report only all year
003Carbon tetrachlorideDAILY MX report only all year
0031,2-DichloroethaneDAILY MX report only all year
003BromoformDAILY MX report only all year
003DibromochloromethaneDAILY MX report only all year
003ChloroformDAILY MX report only all year
003TolueneDAILY MX report only all year
003BenzeneDAILY MX report only all year
003.delta.-BHCDAILY MX report only all year
003AcenaphthyleneDAILY MX report only all year
003AcenaphtheneDAILY MX report only all year
003AcroleinDAILY MX report only all year
003AcrylonitrileDAILY MX report only all year
003AnthraceneDAILY MX report only all year
003Benzo[b]fluorantheneDAILY MX report only all year
003Benzo[k]fluorantheneDAILY MX report only all year
003Benzo[a]pyreneDAILY MX report only all year
003Bis[2-chloroethyl] etherDAILY MX report only all year
003Bis[2-chloroethoxy]methaneDAILY MX report only all year
003Bis[2-chloroisopropyl] etherDAILY MX report only all year
003Butyl benzyl phthalateDAILY MX report only all year
003ChlorobenzeneDAILY MX report only all year
003ChryseneDAILY MX report only all year
003Diethyl phthalateDAILY MX report only all year
003Dimethyl phthalateDAILY MX report only all year
0031,2-DiphenylhydrazineDAILY MX report only all year
003Endosulfan sulfateDAILY MX report only all year
003Endrin aldehydeDAILY MX report only all year
003EthylbenzeneDAILY MX report only all year
003FluorantheneDAILY MX report only all year
003FluoreneDAILY MX report only all year
003HexachlorocyclopentadieneDAILY MX report only all year
003HexachlorobutadieneDAILY MX report only all year
003HexachloroethaneDAILY MX report only all year
003Indeno[1,2,3-cd]pyreneDAILY MX report only all year
003IsophoroneDAILY MX report only all year
003Methyl bromide [Bromomethane]DAILY MX report only all year
003Methyl chloride [Chloromethane]DAILY MX report only all year
003Methylene chlorideDAILY MX report only all year
003N-Nitrosodi-N-propylamineDAILY MX report only all year
003N-NitrosodiphenylamineDAILY MX report only all year
003N-Nitrosodimethylamine [NDMA]DAILY MX report only all year
003NitrobenzeneDAILY MX report only all year
003PhenanthreneDAILY MX report only all year
003PyreneDAILY MX report only all year
003TetrachloroethyleneDAILY MX report only all year
0031,1-DichloroethaneDAILY MX report only all year
0031,1-DichloroethyleneDAILY MX report only all year
0031,1,1-TrichloroethaneDAILY MX report only all year
0031,1,2-TrichloroethaneDAILY MX report only all year
0031,1,2,2-TetrachloroethaneDAILY MX report only all year
003Benzo[ghi]peryleneDAILY MX report only all year
003Benzo[a]anthraceneDAILY MX report only all year
0031,2-DichlorobenzeneDAILY MX report only all year
0031,2-DichloropropaneDAILY MX report only all year
003trans-1,2-DichloroethyleneDAILY MX report only all year
0031,2,4-TrichlorobenzeneDAILY MX report only all year
003Dibenz[a,h]anthraceneDAILY MX report only all year
0031,3-DichlorobenzeneDAILY MX report only all year
0031,4-DichlorobenzeneDAILY MX report only all year
0032-Chloroethyl vinyl ether, [mixed]DAILY MX report only all year
0032-ChloronaphthaleneDAILY MX report only all year
0032-ChlorophenolDAILY MX report only all year
0032-NitrophenolDAILY MX report only all year
003Di-n-octyl phthalateDAILY MX report only all year
0032,4-DichlorophenolDAILY MX report only all year
0032,4-DimethylphenolDAILY MX report only all year
0032,4-DinitrotolueneDAILY MX report only all year
0032,4-DinitrophenolDAILY MX report only all year
0032,4,6-TrichlorophenolDAILY MX report only all year
0032,6-DinitrotolueneDAILY MX report only all year
0033,3'-DichlorobenzidineDAILY MX report only all year
0034-Bromophenyl phenyl etherDAILY MX report only all year
0034-Chlorophenyl phenyl etherDAILY MX report only all year
0034-NitrophenolDAILY MX report only all year
0032,3,7,8-Tetrachlorodibenzo-p-dioxinDAILY MX report only all year
003PhenolDAILY MX report only all year
003NaphthaleneDAILY MX report only all year
003DalaponDAILY MX report only all year
003OxamylDAILY MX report only all year
003PentachlorophenolDAILY MX report only all year
003AtrazineDAILY MX report only all year
003SimazineDAILY MX report only all year
003Di[2-ethylhexyl] phthalate [DEHP]DAILY MX report only all year
003Di-n-butyl phthalateDAILY MX report only all year
003BenzidineDAILY MX report only all year
003Vinyl chlorideDAILY MX report only all year
003TrichloroethyleneDAILY MX report only all year
0034,4'-DDTDAILY MX report only all year
0034,4'-DDDDAILY MX report only all year
0034,4'-DDEDAILY MX report only all year
003AldrinDAILY MX report only all year
003.alpha.-BHCDAILY MX report only all year
003.beta.-BHCDAILY MX report only all year
003.gamma.-BHCDAILY MX report only all year
003Chlordane [tech mix. and metabolites]DAILY MX report only all year
003DieldrinDAILY MX report only all year
003Endosulfan, totalDAILY MX report only all year
003EndrinDAILY MX report only all year
003ToxapheneDAILY MX report only all year
003HeptachlorDAILY MX report only all year
003Heptachlor epoxideDAILY MX report only all year
003MethoxychlorDAILY MX report only all year
003Polychlorinated biphenyls [PCBs]DAILY MX report only all year
003MalathionDAILY MX report only all year
003ParathionDAILY MX report only all year
003GuthionDAILY MX report only all year
003HexachlorobenzeneDAILY MX report only all year
003PicloramDAILY MX report only all year
0032,4-Dichlorophenoxyacetic acidDAILY MX report only all year
003MirexDAILY MX report only all year
0031,2-Dibromo-3-chloropropaneDAILY MX report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualMO AVG <= 9 ug/L all year
003Chlorine, total residualDAILY MX report only all year
003Chlorine, total residualDAILY MX <= 18 ug/L all year
003Chlorine, total residualMO AVG <= 1.7 kg/d all year
003Chlorine, total residualDAILY MX <= 3.4 kg/d all year
003E. coli, colony forming units [CFU]MO AVG <= 126 CFU/100mL all year
003E. coli, colony forming units [CFU]DAILY MX report only all year
003E. coli, colony forming units [CFU]DAILY MX <= 575 CFU/100mL all year
003Di[2-ethylhexyl] adipateDAILY MX report only all year
003EndothallDAILY MX report only all year
0034-Chloro-3-methylphenolDAILY MX report only all year
003Solids, total dissolvedDAILY MX report only all year
003Hydrogen sulfideMO AVG report only all year
003Hydrogen sulfideDAILY MX report only all year
003Hydrogen sulfideDAILY MX report only all year
003Mercury, total recoverableDAILY MX report only all year
003cis-1,2-DichloroethyleneDAILY MX report only all year
0031,3-DichloropropeneDAILY MX report only all year
003Ethylene dibromideDAILY MX report only all year
003AlachlorDAILY MX report only all year
0032,4,5-TPDAILY MX report only all year
003Glyphosate, totalDAILY MX report only all year
003BOD, 5-day, percent removalMO AV MN >= 85 % all year
003Solids, suspended percent removalMO AV MN >= 85 % all year
003ChlorpyrifosDAILY MX report only all year
003CarbofuranDAILY MX report only all year
003Xylene [mix of m+o+p]DAILY MX report only all year
003StyreneDAILY MX report only all year
003ParaquatDAILY MX report only all year
003Permethrin, total recoverableDAILY MX report only all year
003ChloroethaneDAILY MX report only all year
003TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)MO MED report only all year
003TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
003TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
003Static 7Day Chronic Pimephales PromelasMO MED report only all year
003Static 7Day Chronic Pimephales PromelasDAILY MX report only all year
003Static 7Day Chronic Pimephales PromelasDAILY MX report only all year
003TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO MED report only all year
003TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
003TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
INFBOD, 5-day, 20 deg. CMO AVG report only all year
INFBOD, 5-day, 20 deg. CWKLY AVG report only all year
INFSolids, total suspendedMO AVG report only all year
INFSolids, total suspendedWKLY AVG 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