Pima County - Regional Wastewater Reclamation Department

NPDES permit AZ0024121 · Major POTW · effective, expires 2029-05-29 · 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
0required values missing, on 0 form(s)
0of 43 forms filed late

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

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 (88)

OutfallParameterStatisticLimitMonths
006Temperature, water deg. centigradeMO AVG report only all year
006Temperature, water deg. centigradeDAILY MX report only all year
006BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
006BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
006BOD, 5-day, 20 deg. CMO AVG <= 450 kg/d all year
006BOD, 5-day, 20 deg. CWKLY AVG <= 680 kg/d all year
006pHMINIMUM >= 6.5 SU all year
006pHMAXIMUM <= 9 SU all year
006Solids, total suspendedMO AVG <= 30 mg/L all year
006Solids, total suspendedWKLY AVG <= 45 mg/L all year
006Solids, total suspendedMO AVG <= 450 kg/d all year
006Solids, total suspendedWKLY AVG <= 680 kg/d all year
006Oil & GreaseMO AVG report only all year
006Oil & GreaseDAILY MX report only all year
006Nitrogen, ammonia total [as N]MO AVG report only all year
006Nitrogen, ammonia total [as N]DAILY MX report only all year
006Nitrogen, ammonia total [as N]MO AVG <= 1 Ratio all year
006Nitrogen, ammonia total [as N]DAILY MX <= 2 Ratio all year
006Cyanide, total [as CN]MO AVG report only all year
006Cyanide, total [as CN]DAILY MX report only all year
006Sulfide, total [as S]MO AVG report only all year
006Sulfide, total [as S]DAILY MX report only all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Chlorine, total residualMO AVG <= 9 ug/L all year
006Chlorine, total residualDAILY MX <= 18 ug/L all year
006Chlorine, total residualMO AVG <= 140 g/d all year
006Chlorine, total residualDAILY MX <= 270 g/d all year
006E. coli, colony forming units [CFU]MO AVG <= 126 CFU/100mL all year
006E. coli, colony forming units [CFU]DAILY MX <= 575 CFU/100mL all year
006Hydrogen sulfideMO AVG report only all year
006Hydrogen sulfideDAILY MX report only all year
006BOD, 5-day, percent removalMO AV MN >= 85 % all year
006Solids, suspended percent removalMO AV MN >= 85 % all year
006Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED report only all year
006Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMO MED report only all year
006TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)MO MED report only all year
006TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
006Static 7Day Chronic Pimephales PromelasMO MED report only all year
006Static 7Day Chronic Pimephales PromelasDAILY MX report only all year
006TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO MED report only all year
006TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
007Temperature, water deg. centigradeMO AVG report only all year
007Temperature, water deg. centigradeDAILY MX report only all year
007BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
007BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
007BOD, 5-day, 20 deg. CMO AVG <= 450 kg/d all year
007BOD, 5-day, 20 deg. CWKLY AVG <= 680 kg/d all year
007pHMINIMUM >= 6.5 SU all year
007pHMAXIMUM <= 9 SU all year
007Solids, total suspendedMO AVG <= 30 mg/L all year
007Solids, total suspendedWKLY AVG <= 45 mg/L all year
007Solids, total suspendedMO AVG <= 450 kg/d all year
007Solids, total suspendedWKLY AVG <= 680 kg/d all year
007Oil & GreaseMO AVG report only all year
007Oil & GreaseDAILY MX report only all year
007Nitrogen, ammonia total [as N]MO AVG report only all year
007Nitrogen, ammonia total [as N]DAILY MX report only all year
007Nitrogen, ammonia total [as N]MO AVG <= 1 Ratio all year
007Nitrogen, ammonia total [as N]DAILY MX <= 2 Ratio all year
007Cyanide, total [as CN]MO AVG report only all year
007Cyanide, total [as CN]DAILY MX report only all year
007Sulfide, total [as S]MO AVG report only all year
007Sulfide, total [as S]DAILY MX report only all year
007Flow, in conduit or thru treatment plantMO AVG report only all year
007Flow, in conduit or thru treatment plantDAILY MX report only all year
007Chlorine, total residualMO AVG <= 9 ug/L all year
007Chlorine, total residualDAILY MX <= 18 ug/L all year
007Chlorine, total residualMO AVG <= 140 g/d all year
007Chlorine, total residualDAILY MX <= 270 g/d all year
007E. coli, colony forming units [CFU]MO AVG <= 126 CFU/100mL all year
007E. coli, colony forming units [CFU]DAILY MX <= 575 CFU/100mL all year
007Hydrogen sulfideMO AVG report only all year
007Hydrogen sulfideDAILY MX report only all year
007BOD, 5-day, percent removalMO AV MN >= 85 % all year
007Solids, suspended percent removalMO AV MN >= 85 % all year
007Pass/Fail Static Renewal 96Hr Acute Ceriodaphnia dubiaMO MED report only all year
007Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMO MED report only all year
007TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)MO MED report only all year
007TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
007Static 7Day Chronic Pimephales PromelasMO MED report only all year
007Static 7Day Chronic Pimephales PromelasDAILY MX report only all year
007TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO MED report only all year
007TU 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