CITY OF GUTHRIE CENTER

NPDES permit IA0041866 · Minor POTW · effective, expires 2027-07-31 · 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

2values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (2).

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (55)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 80 mg/L all year
001Solids, total suspended7 DA AVG <= 120 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 1.2 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 1.3 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 4.5 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 4.3 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 2.3 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 5 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 3.4 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 1.3 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 3.9 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 3.7 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 3.3 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 4.9 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 20 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3.4 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 8.5 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 3.4 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 28 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 29.4 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 104.5 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 99.7 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 62.9 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 79.8 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 53.6 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 115.4 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 79.9 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 30.9 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 91.9 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 85.2 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 63.1 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 76 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 114 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 465.1 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 62.9 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 79.8 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 62.9 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 197.5 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 79.9 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 62.9 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 91.9 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 91.5 lb/d Dec
001E. coliGEO MEAN <= 126 #/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

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