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City of Mountain Grove

Sewage treatment plant, Mountain Grove, Missouri. NPDES permit MO0028711 expired Jan 31, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (18 values), outfall 001 form B quarterly (6 values), outfall GW1 form A monthly (4 values), outfall SM1 form B quarterly (4 values), outfall SM2 form A monthly (2 values), outfall 001 form WA yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 45 reports late

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 8 mg/Lall year001
Oxygen, dissolved [DO]monthly average minimum≥ 8 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≤ 4.9 mg/LApr–Sep001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1.3 mg/LApr–Sep001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Oct, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Zinc, total recoverabledaily maximum≤ 181 ug/Lall year001
Zinc, total recoverablemonthly average≤ 65 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. coli30-day geometric meanreport only (#/100mL)all year001
Toxicity [acute], Ceriodaphnia dubiadaily maximumreport only (toxic)all year001
Toxicity [acute], Pimephales promelas [Fathead Minnow]daily maximumreport only (toxic)all year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 15 mg/LApr–Sep001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 37 mg/LJan, Feb, Mar, Oct, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 11 mg/LApr–Sep001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 27 mg/LJan, Feb, Mar, Oct, Nov, Dec001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Specific conductancedaily maximumreport only (uS/cm)all yearGW1
Specific conductancemonthly averagereport only (uS/cm)all yearGW1
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all yearGW1
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearGW1
Nitrogen, total [as N]daily maximumreport only (mg/L)all yearSM1
Nitrogen, 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
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all yearSM2
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all yearSM2

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/MO0028711 · MCP: https://passage-data.com/mcp