CITY OF DELHI

NPDES permit IA0047848 · Minor POTW · effective, expires 2027-03-31 · 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

3values 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: Solids, total suspended (2), 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 (76)

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 <= 2.8 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 2 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 1.7 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 1.5 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 4.2 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 1.8 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 3.6 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 4.7 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 12.2 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 24.3 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 9.7 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 22.8 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 9.2 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 17.1 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 15 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 12.8 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 36.1 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 8.8 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 31.1 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 15.3 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 31.1 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 33.6 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 23 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 23 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 27.8 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 27.8 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 40.8 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 27.8 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 72.5 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 23.1 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 33.6 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 23 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 105 lb/d Jan
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jun
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Aug
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Feb
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Mar
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Dec
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L May
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jan
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Jul
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Oct
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]30DA AVG <= 25 mg/L Sep
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 37 mg/L Jun
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 31 mg/L Aug
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Feb
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Mar
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Dec
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L May
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Jan
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 31 mg/L Jul
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Oct
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Apr
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 40 mg/L Nov
001BOD, carbonaceous [5 day, 20 C]DAILY MX <= 38 mg/L Sep

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