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Midland Marketing Systems, Inc.

Sewerage Systems, Hillsboro, Missouri. NPDES permit MO0138932, in force until Jun 30, 2028. Last 12 months: over a limit 13 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (12 values)
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 4 reports late

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

All 13 values over a limit
Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, monthly average17≤ 10 mg/L70%
December 2025BOD, 5-day, 20 deg. C, weekly average17≤ 15 mg/L13%
December 2025E. coli, daily maximum3700≤ 126 #/100mL2837%
December 2025Solids, total suspended, monthly average100≤ 10 mg/L900%
December 2025Solids, total suspended, weekly average100≤ 15 mg/L567%
March 2026Nitrogen, ammonia total [as N], daily maximum6.32≤ 5.6 mg/L13%
March 2026Nitrogen, ammonia total [as N], monthly average6.32≤ 2.1 mg/L201%
June 2026Nitrogen, ammonia total [as N], daily maximum6.55≤ 1.7 mg/L285%
June 2026Nitrogen, ammonia total [as N], monthly average6.55≤ .6 mg/L992%
September 2026BOD, 5-day, 20 deg. C, monthly average11≤ 10 mg/L10%
September 2026E. coli, daily maximum200≤ 126 #/100mL59%
September 2026Nitrogen, ammonia total [as N], daily maximum13.16≤ 1.7 mg/L674%
September 2026Nitrogen, ammonia total [as N], monthly average13.16≤ .6 mg/L2093%

Limits in force (14)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 5.6 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1.7 mg/LApr–Sep
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LJan, Feb, Mar, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .6 mg/LApr–Sep
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. colidaily maximum≤ 126 #/100mLall year
E. colimonthly averagereport only (#/100mL)all year

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/MO0138932 · MCP: https://passage-data.com/mcp