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Missouri-American Water Company

Private Households, Foristell, Missouri. NPDES permit MO0100358, in force until Mar 31, 2029. Last 12 months: over a limit 8 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (15 values), outfall 001 form Q quarterly (6 values), outfall INF form IM monthly (2 values), outfall INF form IQ quarterly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, ammonia total [as N], daily maximum8.22≤ 8 mg/L3%
December 2025Nitrogen, ammonia total [as N], monthly average3.68≤ 1.5 mg/L145%
February 2026Phosphorus, total [as P], annual average1.5≤ 1 mg/L50%
March 2026Phosphorus, total [as P], annual average1.88≤ 1 mg/L88%
April 2026Phosphorus, total [as P], annual average1.61≤ 1 mg/L61%
May 2026Phosphorus, total [as P], annual average1.45≤ 1 mg/L45%
July 2026Phosphorus, total [as P], annual average1.34≤ 1 mg/L34%
August 2026Phosphorus, total [as P], annual average1.21≤ 1 mg/L21%

Limits in force (31)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 20 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 13 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 20 mg/Lall year001
Solids, total suspendedmonthly average≤ 13 mg/Lall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 8 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 8 mg/LApr–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LApr–Sep001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]annual average≤ 1 mg/Lall year001
Aluminum, total recoverabledaily maximumreport only (ug/L)all year001
Aluminum, total recoverablemonthly averagereport only (ug/L)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
E. colidaily maximum≤ 1030 #/100mLApr–Oct001
E. coli30-day geometric mean≤ 206 #/100mLApr–Oct001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearINF
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearINF
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all yearINF
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearINF
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearINF
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearINF
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearINF
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearINF

How strict are these limits?

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

Same industry: the 22 Private Households permits in Missouri.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0100358 · MCP: https://passage-data.com/mcp