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City of Lockwood

Sewage treatment plant, Lockwood, Missouri. NPDES permit MO0030473 expired Dec 31, 2023; its limits still apply. Last 12 months: over a limit 4 times (last November 2025), 6 of 31 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 (6 values), outfall 002 form LA monthly (9 values), outfall INF form IM quarterly (8 values), outfall SM1 form UM quarterly (8 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 3 of 36 reports late

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

Period endingOutfallParameterReportedLimitOver by
October 2025002E. coli, daily maximum180≤ 126 #/100mL43%
November 2025001BOD, 5-day, 20 deg. C, monthly average61.7≤ 45 mg/L37%
November 2025001Solids, suspended percent removal, monthly average minimum1.7≥ 65 %181%
November 2025001Solids, total suspended, monthly average73.1≤ 70 mg/L4%

Limits in force (45)

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≤ 110 mg/Lall year001
Solids, total suspendedmonthly average≤ 70 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, 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
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 year002
Application rate area sprayedmonthly totalreport only (acr)all year002
E. colidaily maximum≤ 126 #/100mLall year002
Application rate, gallons spray irrigationtotalreport only (gal)all year002
Application rate, gallons spray irrigationmonthly totalreport only (gal)all year002
Spray irrigationtotalreport only (hr/d)all year002
Spray irrigationmonthly totalreport only (hr/d)all year002
Spray irrigation, application ratetotalreport only (in/d)all year002
Spray irrigation, application ratemonthly totalreport only (in/d)all year002
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
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/MO0030473 · MCP: https://passage-data.com/mcp