CITY OF MARATHON

NPDES permit IA0067652 · Minor POTW · effective, expires 2030-09-30 · 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

3values over a limit
0required values missing, on 0 form(s)
1of 12 forms filed late

Last period with anything received: 2026-08-31. Most often over: BOD, carbonaceous [5 day, 20 C] (2), pH (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 (62)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 4.4 mg/L all year
001pHDAILY MN >= 6.5 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 <= 24 lb/d all year
001Solids, total suspended7 DA AVG <= 36 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 3.1 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 5.1 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 6.9 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 2.1 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 8.1 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 2 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 7.1 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 3.2 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 4.8 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 2.2 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 11.7 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 15.3 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 16.7 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 16.5 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 19.4 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 15.1 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 14 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 2 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 3.3 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 4.5 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 1.3 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 5.3 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 1.3 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 4.6 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 2.1 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 3.1 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1.4 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 1.7 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 2.3 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 9 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 13.8 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 11.8 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 10.8 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 15 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 13.8 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 11.7 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 13.8 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 10.8 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 9.9 lb/d May
001Nitrogen, Kjeldahl, total [as N]30DA AVG <= 15 lb/d all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX <= 25 lb/d all year
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
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 20 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 32 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