Flagstaff Utilities Division

NPDES permit AZ0023639 · Major POTW · effective, expires 2030-04-17 · 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)
0of 37 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 (74)

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 <= 450 kg/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 680 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 <= 450 kg/d all year
001Solids, total suspendedWKLY AVG <= 680 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
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
001Zinc, total recoverableMO AVG <= 93 ug/L all year
001Zinc, total recoverableDAILY MX <= 190 ug/L all year
001Zinc, total recoverableMO AVG <= 1400 g/d all year
001Zinc, total recoverableDAILY MX <= 2800 g/d all year
001Copper, total recoverableMO AVG <= 18 ug/L all year
001Copper, total recoverableDAILY MX <= 36 ug/L all year
001Copper, total recoverableMO AVG <= 270 g/d all year
001Copper, total recoverableDAILY MX <= 550 g/d 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 <= 140 g/d all year
001Chlorine, total residualDAILY MX <= 270 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
001Cyanide, free availableMO AVG <= 7.9 ug/L all year
001Cyanide, free availableDAILY MX <= 16 ug/L all year
001Cyanide, free availableMO AVG <= 120 g/d all year
001Cyanide, free availableDAILY MX <= 240 g/d all year
001Solids, total dissolvedMO AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Solids, total dissolvedDAILY MX report only all year
001Solids, total dissolvedDAILY MX report only all year
001Hydrogen sulfideMO AVG report only all year
001Hydrogen sulfideDAILY MX report only all year
001Mercury, total recoverableMO AVG <= .008 ug/L all year
001Mercury, total recoverableDAILY MX <= .02 ug/L all year
001Mercury, total recoverableMO AVG <= .1 g/d all year
001Mercury, total recoverableDAILY MX <= .2 g/d all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Pass/Fail Static 96Hr Acute Ceriodaphnia DubiaMO MED report only all year
001Pass/Fail Static 96Hr Acute Ceriodaphnia DubiaDAILY MX report only all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasMO MED report only all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX report only all year
001TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)MO MED report only all year
001TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO MED report only all year
001TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
001TU Static Renewal 7-Day Chronic Pimphales promelasMO MED report only all year
001TU Static Renewal 7-Day Chronic Pimphales promelasDAILY 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 <= 140 g/d all year
002Chlorine, total residualDAILY MX <= 270 g/d 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