CITY OF ZWINGLE

NPDES permit IA0074209 · Minor POTW · effective, expires 2029-09-30 · EPA's file as of 2026-09-19

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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

6values over a limit
4required values missing, on 1 form(s)
1of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (4), E. coli (1), BOD, carbonaceous [5 day, 20 C] (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 (63)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspended7 DA AVG <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 4.3 lb/d all year
001Solids, total suspended7 DA AVG <= 6.5 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 17.9 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 6.2 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 5.6 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 17.9 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 7.8 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 9 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 18.5 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 10.3 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 9.2 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 5.9 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 13.8 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 14.7 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 17.9 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 19.3 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 19.3 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 17.9 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 17.3 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 18.4 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 18.5 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 18.1 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 18.4 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 20.8 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 17.3 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 18.7 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1.9 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= .5 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= .5 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 1.6 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= .6 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= .7 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 1.7 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= .9 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= .8 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= .5 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1.2 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2.3 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 2.6 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 2.6 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 2.4 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 2.3 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 2.5 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 2.5 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 2.4 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 2.5 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 2.8 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 2.3 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 2.5 lb/d Dec
001Chlorine, total residual30DA AVG <= .027 mg/L all year
001Chlorine, total residualDAILY MX <= .027 mg/L all year
001Chlorine, total residual30DA AVG <= .0033 lb/d all year
001Chlorine, total residualDAILY MX <= .0033 lb/d all year
001E. coliGEO MEAN <= 630 #/100mL Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 3.6 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 5.8 lb/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