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Mark Janos

Sewerage Systems, Rolla, Missouri. NPDES permit MO0111121, in force until Jan 31, 2029. Last 12 months: over a limit 10 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form Q quarterly (12 values), outfall 002 form Q quarterly (12 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
12 values over a limit, 68 required values missing, 8 of 8 reports late

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

Period endingOutfallParameterReportedLimitOver by
December 2025001E. coli, 30-day geometric mean2419.6≤ 206 #/100mL1075%
December 2025001E. coli, daily maximum2419.6≤ 1030 #/100mL135%
December 2025002E. coli, 30-day geometric mean> 2419.6≤ 206 #/100mL—
December 2025002E. coli, daily maximum> 2419.6≤ 1030 #/100mL—
December 2025002Nitrogen, ammonia total [as N], daily maximum22.2≤ 12.1 mg/L83%
December 2025002Nitrogen, ammonia total [as N], monthly average22.2≤ 2.9 mg/L666%
March 2026002Nitrogen, ammonia total [as N], daily maximum29.2≤ 12.1 mg/L141%
March 2026002Nitrogen, ammonia total [as N], monthly average29.2≤ 3.1 mg/L842%
June 2026002E. coli, 30-day geometric mean1732.9≤ 206 #/100mL741%
June 2026002E. coli, daily maximum1732.9≤ 1030 #/100mL68%

Limits in force (36)

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
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJul–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct–Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan–Mar001
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LApr–Jun001
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJul–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LOct–Dec001
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan–Mar001
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LApr–Jun001
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≤ 1030 #/100mLApr–Dec001
E. coli30-day geometric mean≤ 206 #/100mLApr–Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year002
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year002
pHminimum≥ 6.5 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedweekly average≤ 45 mg/Lall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJan–Mar002
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LJul–Sep002
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LApr–Jun002
Nitrogen, ammonia total [as N]daily maximum≤ 12.1 mg/LOct–Dec002
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan–Mar002
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/LJul–Sep002
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LApr–Jun002
Nitrogen, ammonia total [as N]monthly average≤ 2.9 mg/LOct–Dec002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
E. colidaily maximum≤ 1030 #/100mLApr–Dec002
E. coli30-day geometric mean≤ 206 #/100mLApr–Dec002

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/MO0111121 · MCP: https://passage-data.com/mcp