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Sac and Fox Tribe of the Mississippi in Iowa

Sewage treatment plant, Tama, Iowa. NPDES permit IA0073750, in force until Apr 30, 2028. Last 12 months: over a limit 3 times (last June 2026), 4 required values missing, 2 of 48 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 58 days after each period: outfall 001A form A quarterly (30 values), outfall 002A form A quarterly (18 values), outfall 003A form A quarterly (10 values), outfall 004I form I quarterly (3 values)
Renewal application due
Nov 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
11 values over a limit, 2 required values missing, 0 of 48 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
June 2026Solids, suspended percent removal, minimum80 %≥ 85 %33%
June 2026Solids, total suspended, monthly average32.3 mg/L≤ 30 mg/L8%
June 2026Solids, total suspended, monthly average32.3 mg/L≤ 30 mg/L8%

Limits in force (71)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001A
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year001A
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001A
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001A
BOD, 5-day, 20 deg. Cmonthly average≤ 105 lb/dall year001A
BOD, 5-day, 20 deg. Cweekly average≤ 158 lb/dall year001A
pHminimum≥ 6.5 SUall year001A
pHmaximum≤ 9 SUall year001A
Solids, total suspendedmonthly average≤ 30 mg/Lall year001A
Solids, total suspendedweekly average≤ 45 mg/Lall year001A
Solids, total suspendedmonthly average≤ 105 lb/dall year001A
Solids, total suspendedweekly average≤ 158 lb/dall year001A
Nitrogen, total [as N]quarterly minimumreport only (mg/L)all year001A
Nitrogen, total [as N]quarterly averagereport only (mg/L)all year001A
Nitrogen, ammonia total [as N]monthly average≤ 2.71 mg/LMar–May001A
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LJun–Sep001A
Nitrogen, ammonia total [as N]monthly average≤ 2.26 mg/LJan, Feb, Oct, Nov, Dec001A
Nitrogen, ammonia total [as N]daily maximum≤ 5.85 mg/LMar–May001A
Nitrogen, ammonia total [as N]daily maximum≤ 4.13 mg/LJun–Sep001A
Nitrogen, ammonia total [as N]daily maximum≤ 5.92 mg/LJan, Feb, Oct, Nov, Dec001A
Nitrogen, ammonia total [as N]monthly average≤ 9.49 lb/dMar–May001A
Nitrogen, ammonia total [as N]monthly average≤ 6.31 lb/dJun–Sep001A
Nitrogen, ammonia total [as N]monthly average≤ 7.92 lb/dJan, Feb, Oct, Nov, Dec001A
Nitrogen, ammonia total [as N]daily maximum≤ 20.49 lb/dMar–May001A
Nitrogen, ammonia total [as N]daily maximum≤ 14.47 lb/dJun–Sep001A
Nitrogen, ammonia total [as N]daily maximum≤ 20.74 lb/dJan, Feb, Oct, Nov, Dec001A
Nitrogen, Kjeldahl, total [as N]quarterly minimumreport only (mg/L)all year001A
Nitrogen, Kjeldahl, total [as N]quarterly averagereport only (mg/L)all year001A
Nitrite + Nitrate total [as N]quarterly minimumreport only (mg/L)all year001A
Nitrite + Nitrate total [as N]quarterly averagereport only (mg/L)all year001A
Phosphorus, total [as P]quarterly minimumreport only (mg/L)all year001A
Phosphorus, total [as P]quarterly averagereport only (mg/L)all year001A
Flow, in conduit or thru treatment plantaveragereport only (MGD)all year001A
E. coli, colony forming units [CFU]single sample≤ 235 CFU/100mLMar–Nov001A
Solids, total dissolved [TDS]quarterly minimumreport only (mg/L)all year001A
Solids, total dissolved [TDS]quarterly averagereport only (mg/L)all year001A
BOD, 5-day, percent removalminimum≥ 85 %all year001A
Solids, suspended percent removalminimum≥ 85 %all year001A
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year002A
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year002A
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year002A
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year002A
pHminimum≥ 6.5 SUall year002A
pHmaximum≤ 9 SUall year002A
Solids, total suspendedmonthly average≤ 80 mg/Lall year002A
Solids, total suspendedweekly average≤ 120 mg/Lall year002A
Nitrogen, total [as N]monthly averagereport only (mg/L)all year002A
Nitrogen, ammonia total [as N]monthly average≤ 1.48 mg/LMar–Sep002A
Nitrogen, ammonia total [as N]monthly average≤ 3.55 mg/LJan, Feb, Oct, Nov, Dec002A
Nitrogen, ammonia total [as N]daily maximum≤ 2.97 mg/LMar–Sep002A
Nitrogen, ammonia total [as N]daily maximum≤ 7.11 mg/LJan, Feb, Oct, Nov, Dec002A
Phosphorus, total [as P]monthly averagereport only (mg/L)all year002A
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002A
E. coli, colony forming units [CFU]single sample≤ 235 CFU/100mLMar–Nov002A
Solids, total dissolved [TDS]monthly averagereport only (mg/L)all year002A
BOD, 5-day, percent removalmonthly average≤ 85 %all year002A
Duration of dischargeEPA's "DPD TOT"report only (d)all year002A
Flow, totalmonthly maximumreport only (Mgal/mo)all year002A
pHminimum≥ 6.5 SUall year003A
pHmaximum≤ 9 SUall year003A
Iron, total [as Fe]monthly maximumreport only (mg/L)all year003A
Manganese, total [as Mn]monthly maximumreport only (mg/L)all year003A
Flow, in conduit or thru treatment plantaveragereport only (MGD)all year003A
Chlorine, total residualmonthly average≤ .039 mg/Lall year003A
Chlorine, total residualdaily maximum≤ .077 mg/Lall year003A
Chlorine, total residualmonthly average≤ .051 lb/dall year003A
Chlorine, total residualdaily maximum≤ .1 lb/dall year003A
Solids, total dissolved [TDS]monthly maximumreport only (mg/L)all year003A
BOD, 5-day, 20 deg. Caveragereport only (mg/L)all year004I
Solids, total suspendedaveragereport only (mg/L)all year004I
Flow, in conduit or thru treatment plantaveragereport only (MGD)all year004I

How strict are these limits?

Cited limits by parameter: Iowa's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0073750 · MCP: https://passage-data.com/mcp