MESA, CITY OF

NPDES permit AZ0024627 · Major POTW · administratively continued, expires 2024-06-30 · 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.

This permit expired on 2024-06-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

0values over a limit
0required values missing, on 0 form(s)
0of 42 forms filed late

Last period with anything received: 2026-08-31.

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 (45)

OutfallParameterStatisticLimitMonths
005Temperature, water deg. centigradeMO AVG report only (alert) all year
005Temperature, water deg. centigradeDAILY MX report only (alert) all year
005BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
005BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
005BOD, 5-day, 20 deg. CMO AVG <= 2044 kg/d all year
005BOD, 5-day, 20 deg. CWKLY AVG <= 3066 kg/d all year
005pHMINIMUM >= 6.5 SU all year
005pHMAXIMUM <= 9 SU all year
005Solids, total suspendedMO AVG <= 30 mg/L all year
005Solids, total suspendedWKLY AVG <= 45 mg/L all year
005Solids, total suspendedMO AVG <= 2044 kg/d all year
005Solids, total suspendedWKLY AVG <= 3066 kg/d all year
005Nitrogen, ammonia total [as N]MO AVG report only (alert) all year
005Nitrogen, ammonia total [as N]DAILY MX report only (alert) all year
005Nitrogen, ammonia total [as N]MO AVG report only (alert) all year
005Nitrogen, ammonia total [as N]DAILY MX report only (alert) all year
005Hardness, total [as CaCO3]MO AVG report only (alert) all year
005Hardness, total [as CaCO3]DAILY MX report only (alert) all year
005Copper, total recoverableMO AVG <= 16.4 ug/L (alert) all year
005Copper, total recoverableDAILY MX <= 27.7 ug/L (alert) all year
005Copper, total recoverableMO AVG <= 1.11 kg/d (alert) all year
005Copper, total recoverableDAILY MX <= 1.89 kg/d (alert) all year
005Flow, in conduit or thru treatment plantMO AVG report only all year
005Flow, in conduit or thru treatment plantWKLY AVG report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Chlorine, total residualMO AVG <= 11 ug/L all year
005Chlorine, total residualDAILY MX <= 19 ug/L all year
005Chlorine, total residualMO AVG <= .61 kg/d all year
005Chlorine, total residualDAILY MX <= 1.23 kg/d all year
005E. coli, colony forming units [CFU]GEO MEAN <= 126 CFU/100mL all year
005E. coli, colony forming units [CFU]DAILY MX <= 576 CFU/100mL all year
005BOD, 5-day, percent removalMO AV MN >= 85 % all year
005Solids, suspended percent removalMO AV MN >= 85 % all year
005TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO AV MN >= 1 tox chronic all year
005TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX <= 1.6 tox chronic all year
005TU Static Renewal 7-Day Chronic Pimphales promelasMO AV MN >= 1 tox chronic all year
005TU Static Renewal 7-Day Chronic Pimphales promelasDAILY MX <= 1.6 tox chronic all year
INFBOD, 5-day, 20 deg. CMO AVG 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 suspendedDAILY MX report only all year
INFSolids, total suspendedMO AVG report only all year
INFSolids, total suspendedDAILY 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