CITY OF MIDDLETOWN

NPDES permit IA0025381 · Minor POTW · effective, expires 2026-10-31 · 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

0values over a limit
4required values missing, on 1 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31.

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 (65)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 1 mg/L all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001pH30DA AVG report only all year
001pHDAILY MX report only all year
001Solids, total suspended30DA AVG <= 80 mg/L all year
001Solids, total suspended7 DA AVG <= 120 mg/L all year
001Solids, total suspended30DA AVG <= 245 lb/d all year
001Solids, total suspended7 DA AVG <= 367 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 7.4 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 11.1 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 9.36 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 12.5 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 15.3 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 7.9 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 16.8 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 8.72 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 18.3 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 7.61 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 7.54 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 13.8 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 11 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 14.5 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 16.5 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 13.2 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 18.8 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 21 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 12.9 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 12.8 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 14.5 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 21 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 30 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 26 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 33 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 40 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 22 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 44 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 24 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 47 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 21 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 22 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 37 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 33 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 42 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 37 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 37 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 47 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 40 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 54 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 37 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 61 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 37 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 37 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 42 lb/d Dec
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 <= 77 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 122 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