UNITED STATES GYPSUM COMPANY

NPDES permit IA0062359 · Minor NON-POTW · administratively continued, expires 2015-12-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2015-12-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
0required values missing, on 0 form(s)
0of 48 forms filed late

Last period with anything received: 2026-08-31. Most often over: Solids, total suspended (1).

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 (49)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedDAILY MX <= 30 mg/L 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 <= 2.3 lb/d all year
001Solids, total suspended7 DA AVG <= 3.4 lb/d all year
001Nitrogen, ammonia total [as N]30DA AVG <= 1.8 mg/L May
001Nitrogen, ammonia total [as N]30DA AVG <= 1.1 mg/L Jul
001Nitrogen, ammonia total [as N]30DA AVG <= 5.8 mg/L Feb
001Nitrogen, ammonia total [as N]30DA AVG <= 1.3 mg/L Jun
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Oct
001Nitrogen, ammonia total [as N]30DA AVG <= 3.9 mg/L Dec
001Nitrogen, ammonia total [as N]30DA AVG <= 1.5 mg/L Sep
001Nitrogen, ammonia total [as N]30DA AVG <= 2.7 mg/L Nov
001Nitrogen, ammonia total [as N]30DA AVG <= 1 mg/L Aug
001Nitrogen, ammonia total [as N]30DA AVG <= 3.9 mg/L Mar
001Nitrogen, ammonia total [as N]30DA AVG <= 2.1 mg/L Apr
001Nitrogen, ammonia total [as N]30DA AVG <= 5.2 mg/L Jan
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L May
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jul
001Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Feb
001Nitrogen, ammonia total [as N]DAILY MX <= 3.2 mg/L Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 2.7 mg/L Oct
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 <= 2.7 mg/L Aug
001Nitrogen, ammonia total [as N]DAILY MX <= 3.9 mg/L Mar
001Nitrogen, ammonia total [as N]DAILY MX <= 4.7 mg/L Apr
001Nitrogen, ammonia total [as N]DAILY MX <= 19.9 mg/L Jan
001Nitrogen, nitrate total [as N]30DA AVG <= 2.4 lb/d all year
001Nitrogen, nitrate total [as N]DAILY MX <= 7.46 lb/d all year
001E. coli30DA AVG <= 630 #/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 <= 1.9 lb/d all year
001BOD, carbonaceous [5 day, 20 C]7 DA AVG <= 3 lb/d all year
002pHDAILY MN >= 6.5 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
003pHDAILY MN >= 6.5 SU all year
003pHDAILY MX <= 9 SU all year
003Solids, total suspendedDAILY MX <= 30 mg/L all year
004pHDAILY MN >= 6.5 SU all year
004pHDAILY MX <= 9 SU all year
004Solids, total suspendedDAILY MX <= 30 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