CITY OF SALEM

NPDES permit IA0047996 · Minor POTW · effective, expires 2030-01-31 · 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

3values over a limit
20required values missing, on 2 form(s)
5of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (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 (54)

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 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 1.8 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 2.6 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1.2 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 3.5 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 1.7 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1.6 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 3.5 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 4.1 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 3.5 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 2.8 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 2.8 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 2.9 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 3.6 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 20.4 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 3 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 5 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 4 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 3.6 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 4 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 8.7 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 15.4 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 13.6 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 19.9 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 9 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 8.8 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 26.8 lb/d Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 8.3 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 13.2 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 21 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 11.9 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 27 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 31.3 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 26.7 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 21.7 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 21.3 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 22.5 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 27.9 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 156.3 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 23.1 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 38.3 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 30.8 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 27.4 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 30.8 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 66.6 lb/d Feb
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