Epcor Water Arizona Inc.

NPDES permit AZ0026204 · Major NON-POTW · effective, expires 2030-04-20 · 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

0values over a limit
0required values missing, on 0 form(s)
8of 50 forms filed late

Last period with anything received: 2026-07-31.

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 (181)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeMO AVG report only all year
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. CWKLY AVG <= 45 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 454 kg/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 681 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 suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 454 kg/d all year
001Solids, total suspendedWKLY AVG <= 681 kg/d all year
001Oil & GreaseMO AVG report only all year
001Oil & GreaseDAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Cyanide, total [as CN]MO AVG report only all year
001Cyanide, total [as CN]DAILY MX report only all year
001Sulfide, total [as S]MO AVG report only all year
001Sulfide, total [as S]DAILY MX report only all year
001Hardness, total [as CaCO3]MO AVG report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Chromium, total [as Cr]MO AVG report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Zinc, total recoverableMO AVG <= 120 ug/L all year
001Zinc, total recoverableDAILY MX <= 250 ug/L all year
001Zinc, total recoverableMO AVG <= 1900 g/d all year
001Zinc, total recoverableDAILY MX <= 3700 g/d all year
001Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMO AVG <= 9 ug/L all year
001Chlorine, total residualDAILY MX <= 18 ug/L all year
001Chlorine, total residualMO AVG <= 136 g/d all year
001Chlorine, total residualDAILY MX <= 273 g/d all year
001E. coli, colony forming units [CFU]MO AVG <= 126 CFU/100mL all year
001E. coli, colony forming units [CFU]DAILY MX <= 575 CFU/100mL all year
001Hydrogen sulfideMO AVG report only all year
001Hydrogen sulfideDAILY MX report only all year
001Mercury, total recoverableMO AVG report only all year
001Mercury, total recoverableDAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMO MED <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX <= 0 pass=0;fail=1 all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaMO MED <= 0 pass=0;fail=1 all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 0 pass=0;fail=1 all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 50 % effect all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasMO MED <= 0 pass=0;fail=1 all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX <= 0 pass=0;fail=1 all year
001Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX <= 50 % effect all year
001Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataMO MED <= 0 pass=0;fail=1 all year
001Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataDAILY MX <= 0 pass=0;fail=1 all year
001Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataDAILY MX <= 50 % effect all year
002Temperature, water deg. centigradeMO AVG report only all year
002Temperature, water deg. centigradeDAILY MX report only all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 454 kg/d all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 681 kg/d all year
002pHMINIMUM >= 6.5 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedWKLY AVG <= 45 mg/L all year
002Solids, total suspendedMO AVG <= 454 kg/d all year
002Solids, total suspendedWKLY AVG <= 681 kg/d all year
002Oil & GreaseMO AVG report only all year
002Oil & GreaseDAILY MX report only all year
002Nitrogen, ammonia total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Cyanide, total [as CN]MO AVG report only all year
002Cyanide, total [as CN]DAILY MX report only all year
002Sulfide, total [as S]MO AVG report only all year
002Sulfide, total [as S]DAILY MX report only all year
002Hardness, total [as CaCO3]MO AVG report only all year
002Hardness, total [as CaCO3]DAILY MX report only all year
002Chromium, total [as Cr]MO AVG report only all year
002Chromium, total [as Cr]DAILY MX report only all year
002Zinc, total recoverableMO AVG <= 120 ug/L all year
002Zinc, total recoverableDAILY MX <= 250 ug/L all year
002Zinc, total recoverableMO AVG <= 1900 g/d all year
002Zinc, total recoverableDAILY MX <= 3700 g/d all year
002Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
002Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
002Chlorine, total residualMO AVG <= 9 ug/L all year
002Chlorine, total residualDAILY MX <= 18 ug/L all year
002Chlorine, total residualMO AVG <= 136 g/d all year
002Chlorine, total residualDAILY MX <= 273 g/d all year
002E. coli, colony forming units [CFU]MO AVG <= 126 CFU/100mL all year
002E. coli, colony forming units [CFU]DAILY MX <= 575 CFU/100mL all year
002Hydrogen sulfideMO AVG report only all year
002Hydrogen sulfideDAILY MX report only all year
002Mercury, total recoverableMO AVG report only all year
002Mercury, total recoverableDAILY MX report only all year
002BOD, 5-day, percent removalMO AV MN >= 85 % all year
002Solids, suspended percent removalMO AV MN >= 85 % all year
002Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED <= 0 pass=0;fail=1 all year
002Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
002Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMO MED <= 0 pass=0;fail=1 all year
002Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX <= 0 pass=0;fail=1 all year
002Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaMO MED <= 0 pass=0;fail=1 all year
002Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 0 pass=0;fail=1 all year
002Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 50 % effect all year
002Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasMO MED <= 0 pass=0;fail=1 all year
002Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX <= 0 pass=0;fail=1 all year
002Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX <= 50 % effect all year
002Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataMO MED <= 0 pass=0;fail=1 all year
002Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataDAILY MX <= 0 pass=0;fail=1 all year
002Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataDAILY MX <= 50 % effect all year
003Temperature, water deg. centigradeMO AVG report only all year
003Temperature, water deg. centigradeDAILY 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. CMO AVG <= 454 kg/d all year
003BOD, 5-day, 20 deg. CWKLY AVG <= 681 kg/d all year
003pHMINIMUM >= 6.5 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspendedMO AVG <= 30 mg/L all year
003Solids, total suspendedWKLY AVG <= 45 mg/L all year
003Solids, total suspendedMO AVG <= 454 kg/d all year
003Solids, total suspendedWKLY AVG <= 681 kg/d all year
003Oil & GreaseMO AVG report only all year
003Oil & GreaseDAILY MX report only all year
003Nitrogen, ammonia total [as N]MO AVG report only all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Nitrogen, ammonia total [as N]MO AVG report only all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Cyanide, total [as CN]MO AVG report only all year
003Cyanide, total [as CN]DAILY MX report only all year
003Sulfide, total [as S]MO AVG report only all year
003Sulfide, total [as S]DAILY MX report only all year
003Hardness, total [as CaCO3]MO AVG report only all year
003Hardness, total [as CaCO3]DAILY MX report only all year
003Chromium, total [as Cr]MO AVG report only all year
003Chromium, total [as Cr]DAILY MX report only all year
003Zinc, total recoverableMO AVG <= 120 ug/L all year
003Zinc, total recoverableDAILY MX <= 250 ug/L all year
003Zinc, total recoverableMO AVG <= 1900 g/d all year
003Zinc, total recoverableDAILY MX <= 3700 g/d all year
003Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
003Chromium, hexavalent dissolved [as Cr]DAILY 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 <= 18 ug/L all year
003Chlorine, total residualMO AVG <= 136 g/d all year
003Chlorine, total residualDAILY MX <= 273 g/d all year
003E. coli, colony forming units [CFU]MO AVG <= 126 CFU/100mL all year
003E. coli, colony forming units [CFU]DAILY MX <= 575 CFU/100mL all year
003Hydrogen sulfideMO AVG report only all year
003Hydrogen sulfideDAILY MX report only all year
003Mercury, total recoverableMO AVG report only all year
003Mercury, total recoverableDAILY MX report only all year
003BOD, 5-day, percent removalMO AV MN >= 85 % all year
003Solids, suspended percent removalMO AV MN >= 85 % all year
003Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED <= 0 pass=0;fail=1 all year
003Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
003Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMO MED <= 0 pass=0;fail=1 all year
003Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX <= 0 pass=0;fail=1 all year
003Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaMO MED <= 0 pass=0;fail=1 all year
003Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 0 pass=0;fail=1 all year
003Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR8dmax C dubiaDAILY MX <= 50 % effect all year
003Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasMO MED <= 0 pass=0;fail=1 all year
003Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX <= 0 pass=0;fail=1 all year
003Chronic Mthd Sublethal Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, StatR7d P promelasDAILY MX <= 50 % effect all year
003Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataMO MED <= 0 pass=0;fail=1 all year
003Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataDAILY MX <= 0 pass=0;fail=1 all year
003Chronic Mthd Growth Endpt, %Effect, Median TSTcHo R/nR Pass/Fail, Static96hr R subcapitataDAILY MX <= 50 % effect 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