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NPDES permit IA0004570 · Minor NON-POTW · effective, expires 2029-08-31 · 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
2required values missing, on 1 form(s)
0of 22 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (37)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 13.4 mg/L all year
001Solids, total suspendedDAILY MX <= 44.6 mg/L all year
001Solids, total suspended30DA AVG <= 5.33 lb/d all year
001Solids, total suspendedDAILY MX <= 17.8 lb/d all year
001Oil & Grease30DA AVG <= 6.68 mg/L all year
001Oil & GreaseDAILY MX <= 8.91 mg/L all year
001Oil & Grease30DA AVG <= 2.66 lb/d all year
001Oil & GreaseDAILY MX <= 3.55 lb/d all year
001Chromium, hexavalent [as Cr]30DA AVG <= .011 mg/L all year
001Chromium, hexavalent [as Cr]DAILY MX <= .016 mg/L all year
001Chromium, hexavalent [as Cr]30DA AVG <= .032 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= .044 lb/d all year
001Chromium, total [as Cr]30DA AVG <= .111 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .111 mg/L all year
001Chromium, total [as Cr]30DA AVG <= .044 lb/d all year
001Chromium, total [as Cr]DAILY MX <= .044 lb/d all year
001Copper, total [as Cu]30DA AVG <= .031 mg/L all year
001Copper, total [as Cu]DAILY MX <= .037 mg/L all year
001Copper, total [as Cu]30DA AVG <= .08 lb/d all year
001Copper, total [as Cu]DAILY MX <= .1 lb/d all year
001Iron, total [as Fe]30DA AVG <= 1 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1 mg/L all year
001Iron, total [as Fe]30DA AVG <= 2.71 lb/d all year
001Iron, total [as Fe]DAILY MX <= 2.71 lb/d all year
001Zinc, total [as Zn]30DA AVG <= .216 mg/L all year
001Zinc, total [as Zn]DAILY MX <= .216 mg/L all year
001Zinc, total [as Zn]30DA AVG <= .221 lb/d all year
001Zinc, total [as Zn]DAILY MX <= .221 lb/d all year
001Chlorine, total residual30DA AVG <= .011 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Chlorine, total residual30DA AVG <= .033 lb/d all year
001Chlorine, total residualDAILY MX <= .054 lb/d all year
003Chlorine, free available30DA AVG <= .2 mg/L all year
003Chlorine, free availableDAILY MX <= .5 mg/L all year
003Chlorination durationDAILY MX <= 2 hr/d 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