CITY OF ARMSTRONG

NPDES permit IA0028517 · Minor POTW · effective, expires 2027-05-31 · 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

7values over a limit
2required values missing, on 1 form(s)
3of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (5), E. coli (1), 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 (86)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DAILY MN >= 2 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 >= 6.2 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 <= 217 lb/d all year
001Solids, total suspended7 DA AVG <= 325 lb/d all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil & Grease30DA AVG <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Nitrogen, ammonia total [as N]30DA AVG <= 4.9 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 4.2 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 2.8 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 12.2 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 6.6 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 3.2 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 6 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 3 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 4.9 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 4.4 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 13.4 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 6.4 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 5 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 5 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 12.2 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 6.6 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 4.9 mg/L Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 6 mg/L Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 51 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 4.9 mg/L Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 4.2 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 4.4 mg/L Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 23.2 mg/L Jan
001Nitrogen, ammonia total [as N]30DA AVG <= 13.3 lb/d Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 11.4 lb/d May
001Nitrogen, ammonia total [as N]30DA AVG <= 7.7 lb/d Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 33.2 lb/d Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 17.8 lb/d Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 8.7 lb/d Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 16.4 lb/d Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 8.1 lb/d Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 13.2 lb/d Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 7.4 lb/d Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 12 lb/d Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 36.4 lb/d Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 17.4 lb/d Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 13.4 lb/d May
001Nitrogen, ammonia total [as N]DAILY MX <= 13.4 lb/d Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 33.3 lb/d Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 17.8 lb/d Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 13.2 lb/d Sep
001Nitrogen, ammonia total [as N]DAILY MX <= 16.4 lb/d Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 13.8 lb/d Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 13.2 lb/d Oct
001Nitrogen, ammonia total [as N]DAILY MX <= 11.4 lb/d Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 12 lb/d Nov
001Nitrogen, ammonia total [as N]DAILY MX <= 63 lb/d Jan
001Nitrogen, nitrate total [as N]30DA AVG <= 63 lb/d all year
001Nitrogen, nitrate total [as N]DAILY MX <= 103 lb/d all year
001Cyanide, total [as CN]30DA AVG <= .02107 mg/L all year
001Cyanide, total [as CN]DAILY MX <= .04384 mg/L all year
001Cyanide, total [as CN]30DA AVG <= .0571 lb/d all year
001Cyanide, total [as CN]DAILY MX <= .1188 lb/d all year
001Chloride [as Cl]30DA AVG report only all year
001Chloride [as Cl]DAILY MX report only all year
001Chloride [as Cl]30DA AVG report only all year
001Chloride [as Cl]DAILY MX report only all year
001Copper, total [as Cu]30DA AVG <= .05361 mg/L all year
001Copper, total [as Cu]DAILY MX <= .05361 mg/L all year
001Copper, total [as Cu]30DA AVG <= .1453 lb/d all year
001Copper, total [as Cu]DAILY MX <= .1453 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 <= 68 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 108 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