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City of Seymour

Sewage treatment plant, Seymour, Missouri. NPDES permit MO0022985 expired Dec 31, 2025; its limits still apply. 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 (26 values), outfall 001 form Q quarterly (6 values), outfall INF form IM monthly (2 values), outfall INF form IQ quarterly (8 values), outfall 001 form A yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 2 of 33 reports late

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

Period endingParameterReportedLimitOver by
November 2025pH, maximum9.2≤ 9 SU—
December 2025pH, maximum10.2≤ 9 SU—
February 2026Aluminum, total recoverable, monthly average277≤ 270.46 ug/L2%
February 2026E. coli, daily maximum866≤ 126 #/100mL587%
April 2026E. coli, daily maximum2420≤ 126 #/100mL1821%
August 2026Nitrogen, ammonia total [as N], daily maximum12.5≤ 10.1 mg/L24%
August 2026Nitrogen, ammonia total [as N], monthly average12.5≤ 1.3 mg/L862%
August 2026Phosphorus, total [as P], monthly average4.64≤ .5 mg/L828%

Limits in force (60)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year001
Oxygen, dissolved [DO]monthly average minimum≥ 5 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 20 mg/Lall year001
Solids, total suspendedmonthly average≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.daily maximum≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 10 mg/Lall year001
Nitrogen, total [as N]annual averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LFeb001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 1.8 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJul001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]monthly averagereport 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]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly average≤ .5 mg/Lall year001
Aluminum, total recoverabledaily maximum≤ 750 ug/Lall year001
Aluminum, total recoverablemonthly average≤ 270.46 ug/Lall 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≤ 126 #/100mLall year001
E. colimonthly averagereport only (#/100mL)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF
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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MO0022985 · MCP: https://passage-data.com/mcp