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City of Rich Hill

Sewage treatment plant, Rich Hill, Missouri. NPDES permit MO0092517, in force until Sep 30, 2028. Last 12 months: over a limit 22 times (last August 2026), 2 required values missing, 2 of 28 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form M monthly (14 values), outfall 001 form Q quarterly (10 values), outfall INF form IM monthly (2 values), outfall INF form IQ quarterly (8 values), outfall 001 form WA every 60 months
Renewal application due
Apr 3, 2028 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
22 values over a limit, 0 required values missing, 2 of 32 reports late

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

All 22 values over a limit
Period endingParameterReportedLimitOver by
October 2025E. coli, 30-day geometric mean2419.6≤ 126 #/100mL1820%
October 2025E. coli, 7-day geometric mean2419.6≤ 630 #/100mL284%
October 2025Nitrogen, ammonia total [as N], daily maximum25.7≤ 12.1 mg/L112%
October 2025Nitrogen, ammonia total [as N], monthly average25.7≤ 2.6 mg/L888%
November 2025BOD, 5-day, percent removal, monthly average minimum63≥ 85 %147%
November 2025Nitrogen, ammonia total [as N], monthly average7.2≤ 3.1 mg/L132%
December 2025Nitrogen, ammonia total [as N], monthly average4.7≤ 2.7 mg/L74%
January 2026Nitrogen, ammonia total [as N], daily maximum19.2≤ 12.1 mg/L59%
January 2026Nitrogen, ammonia total [as N], monthly average19.2≤ 3.1 mg/L519%
April 2026E. coli, 30-day geometric mean2419.6≤ 126 #/100mL1820%
April 2026E. coli, 7-day geometric mean2419.6≤ 630 #/100mL284%
May 2026E. coli, 30-day geometric mean2419.6≤ 126 #/100mL1820%
May 2026E. coli, 7-day geometric mean2419.6≤ 630 #/100mL284%
May 2026Nitrogen, ammonia total [as N], daily maximum14.6≤ 12.1 mg/L21%
May 2026Nitrogen, ammonia total [as N], monthly average14.6≤ 1.9 mg/L668%
June 2026E. coli, 30-day geometric mean2419.6≤ 126 #/100mL1820%
June 2026E. coli, 7-day geometric mean2419.6≤ 630 #/100mL284%
July 2026E. coli, 30-day geometric mean2419.6≤ 126 #/100mL1820%
July 2026E. coli, 7-day geometric mean2419.6≤ 630 #/100mL284%
July 2026Nitrogen, ammonia total [as N], monthly average8.4≤ 1.1 mg/L664%
August 2026E. coli, 30-day geometric mean2419.6≤ 126 #/100mL1820%
August 2026E. coli, 7-day geometric mean2419.6≤ 630 #/100mL284%

Limits in force (52)

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 maximumreport only (mg/L)all year001
Oil and grease [soxhlet extr.] tot.monthly averagereport only (mg/L)all 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≤ 10.1 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LFeb, Mar, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan, Nov001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LMay001
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/LJul001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LJun001
Nitrogen, ammonia total [as N]monthly average≤ 2.3 mg/LApr001
Nitrogen, ammonia total [as N]monthly average≤ 2.6 mg/LOct001
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LSep001
Nitrogen, ammonia total [as N]monthly average≤ 2.7 mg/LFeb, Mar, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LAug001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan, Nov001
Nitrogen, ammonia total [as N]monthly average≤ 1.9 mg/LMay001
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
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≤ 630 #/100mLApr–Oct001
E. coli30-day geometric mean≤ 126 #/100mLApr–Oct001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)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/MO0092517 · MCP: https://passage-data.com/mcp