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City of Greenfield

Sewage treatment plant, Greenfield, Missouri. NPDES permit MO0055590 expired Mar 31, 2024; its limits still apply. Last 12 months: over a limit 6 times (last June 2026), 20 required values missing, 7 of 53 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (14 values), outfall 001 form B quarterly (6 values), outfall 001 form IM quarterly (8 values), outfall 001 form SB monthly (3 values), outfall 003 form LW monthly (8 values), outfall 004 form LW monthly (8 values), and 2 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 24 required values missing, 3 of 60 reports late

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

Period endingParameterReportedLimitOver by
November 2025Solids, suspended percent removal, monthly average minimum3≥ 65 %177%
March 2026Solids, suspended percent removal, monthly average minimum58.4≥ 65 %19%
April 2026Solids, suspended percent removal, monthly average minimum37.9≥ 65 %77%
June 2026E. coli, 30-day geometric mean2280≤ 206 #/100mL1007%
June 2026E. coli, 7-day geometric mean2280≤ 1030 #/100mL121%
June 2026Solids, suspended percent removal, monthly average minimum29.6≥ 65 %101%

Limits in force (59)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cweekly average≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedweekly average≤ 120 mg/Lall year001
Solids, total suspendedmonthly average≤ 80 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, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly averagereport 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]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
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
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≤ 1030 #/100mLApr–Oct001
E. coli30-day geometric mean≤ 206 #/100mLApr–Oct001
Freeboardmonthly totalreport only (ft)all year001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year001
Precipitation volumetotalreport only (in/d)all year001
Precipitation volumemonthly totalreport only (in/d)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %all year001
Application rate area sprayedtotalreport only (acr)all year003
Application rate area sprayedmonthly totalreport only (acr)all year003
Application rate, gallons spray irrigationtotalreport only (gal)all year003
Application rate, gallons spray irrigationmonthly totalreport only (gal)all year003
Spray irrigationtotalreport only (hr/d)all year003
Spray irrigationmonthly totalreport only (hr/d)all year003
Spray irrigation, application ratetotalreport only (in/d)all year003
Spray irrigation, application ratemonthly totalreport only (in/d)all year003
Application rate area sprayedtotalreport only (acr)all year004
Application rate area sprayedmonthly totalreport only (acr)all year004
Application rate, gallons spray irrigationtotalreport only (gal)all year004
Application rate, gallons spray irrigationmonthly totalreport only (gal)all year004
Spray irrigationtotalreport only (hr/d)all year004
Spray irrigationmonthly totalreport only (hr/d)all year004
Spray irrigation, application ratetotalreport only (in/d)all year004
Spray irrigation, application ratemonthly totalreport only (in/d)all year004
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearSM1
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearSM1
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all yearSM1
Phosphorus, total [as P]daily maximumreport only (mg/L)all yearSM1
Phosphorus, total [as P]monthly averagereport only (mg/L)all yearSM1

How strict are these limits?

Cited limits by parameter: Missouri'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/MO0055590 · MCP: https://passage-data.com/mcp