SIOUX VALLEY INVESTMENTS, LLC

NPDES permit IA0082121 · Minor NON-POTW · effective, expires 2030-12-31 · 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

2values over a limit
19required values missing, on 6 form(s)
1of 10 forms filed late

Last period with anything received: 2026-06-30. Most often over: Sulfate, total [as SO4] (2).

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 (20)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 90 deg F all year
001Oxygen, dissolved [DO]DAILY MN >= 5 mg/L all year
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 11.6 lb/d all year
001Solids, total suspendedDAILY MX <= 17.45 lb/d all year
001Sulfate, total [as SO4]30DA AVG <= 1520 mg/L all year
001Sulfate, total [as SO4]DAILY MX <= 1520 mg/L all year
001Sulfate, total [as SO4]30DA AVG <= 215 lb/d all year
001Sulfate, total [as SO4]DAILY MX <= 215 lb/d all year
001Iron, total [as Fe]30DA AVG <= 1.004 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1.004 mg/L all year
001Iron, total [as Fe]30DA AVG <= .142 lb/d all year
001Iron, total [as Fe]DAILY MX <= .142 lb/d all year
001Chlorine, total residual30DA AVG <= .312 mg/L all year
001Chlorine, total residualDAILY MX <= .32 mg/L all year
001Chlorine, total residual30DA AVG <= .121 lb/d all year
001Chlorine, total residualDAILY MX <= .124 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