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City of Dexter

Sewage treatment plant, major discharger, Dexter, Missouri. NPDES permit MO0023213, in force until May 31, 2029. Last 12 months: over a limit 36 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (24 values), outfall 001 form Q quarterly (8 values), outfall INF form IM monthly (6 values), outfall 001 form WA yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
50 values over a limit, 4 required values missing, 4 of 29 reports late

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

All 36 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, percent removal, monthly average minimum68.6≥ 85 %109%
October 2025Solids, suspended percent removal, monthly average minimum65.08≥ 85 %133%
October 2025Solids, total suspended, monthly average33.8≤ 30 mg/L13%
November 2025Nitrogen, ammonia total [as N], daily maximum7.08≤ 4.9 mg/L44%
November 2025Solids, suspended percent removal, monthly average minimum72.23≥ 85 %85%
December 2025Nitrogen, ammonia total [as N], daily maximum15.4≤ 4.9 mg/L214%
December 2025Nitrogen, ammonia total [as N], monthly average12.158≤ 3 mg/L305%
January 2026Nitrogen, ammonia total [as N], daily maximum21.3≤ 4.9 mg/L335%
January 2026Nitrogen, ammonia total [as N], monthly average19.075≤ 3 mg/L536%
February 2026Nitrogen, ammonia total [as N], daily maximum23.8≤ 4.9 mg/L386%
February 2026Nitrogen, ammonia total [as N], monthly average21.575≤ 3 mg/L619%
February 2026Solids, suspended percent removal, monthly average minimum63.39≥ 85 %144%
March 2026BOD, 5-day, percent removal, monthly average minimum80≥ 85 %33%
March 2026Nitrogen, ammonia total [as N], daily maximum20.5≤ 4.9 mg/L318%
March 2026Nitrogen, ammonia total [as N], monthly average19.15≤ 3 mg/L538%
March 2026Solids, suspended percent removal, monthly average minimum72≥ 85 %87%
April 2026Nitrogen, ammonia total [as N], daily maximum21.7≤ 2.6 mg/L735%
April 2026Nitrogen, ammonia total [as N], monthly average20.64≤ 1.4 mg/L1374%
May 2026BOD, 5-day, 20 deg. C, monthly average59.175≤ 30 mg/L97%
May 2026BOD, 5-day, 20 deg. C, weekly average135≤ 45 mg/L200%
May 2026BOD, 5-day, percent removal, monthly average minimum31.904≥ 85 %354%
May 2026E. coli, 30-day geometric mean263.5≤ 206 #/100mL28%
May 2026Nitrogen, ammonia total [as N], daily maximum15.4≤ 2.6 mg/L492%
May 2026Nitrogen, ammonia total [as N], monthly average3.932≤ 1.4 mg/L181%
May 2026Solids, suspended percent removal, monthly average minimum46.732≥ 85 %255%
May 2026Solids, total suspended, monthly average34≤ 30 mg/L13%
May 2026Solids, total suspended, weekly average52≤ 45 mg/L16%
June 2026BOD, 5-day, percent removal, monthly average minimum53.758≥ 85 %208%
June 2026Solids, suspended percent removal, monthly average minimum8.307≥ 85 %511%
July 2026Solids, total suspended, monthly average38.8≤ 30 mg/L29%
July 2026Solids, total suspended, weekly average52≤ 45 mg/L16%
July 2026pH, maximum9.4≤ 9 SU—
August 2026BOD, 5-day, percent removal, monthly average minimum56.313≥ 85 %191%
August 2026Solids, suspended percent removal, monthly average minimum12.429≥ 85 %484%
August 2026Solids, total suspended, monthly average38.75≤ 30 mg/L29%
August 2026pH, maximum9.34≤ 9 SU—

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 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]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≤ 2.6 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 2.6 mg/LApr, May, Jun, Jul, Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 4.9 mg/LJan, Feb, Mar, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.2 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 1.4 mg/LApr, May, Jun, Jul, Sep001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 3 mg/LJan, Feb, Mar, Nov, Dec001
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]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Iron, total recoverabledaily maximum≤ 1434 ug/Lall year001
Iron, total recoverablemonthly average≤ 882 ug/Lall year001
Selenium, total recoverabledaily maximumreport only (ug/L)all year001
Selenium, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, 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. coli7-day geometric mean≤ 1030 #/100mLApr–Oct001
E. coli30-day geometric mean≤ 206 #/100mLApr–Oct001
Toxicity [acute], Ceriodaphnia dubiadaily maximum≤ .3 toxicall year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximum≤ .3 toxicall 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]monthly averagereport only (mg/L)all yearINF
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearINF
Nitrite + Nitrate total [as N]monthly averagereport 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.

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Your permit document is the final word. As JSON: /api/v1/permits/MO0023213 · MCP: https://passage-data.com/mcp