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Clarksville Montgomery County School System

Sewage treatment plant, Cunningham, Tennessee. NPDES permit TN0024643, in force until Jun 30, 2030. Last 12 months: over a limit 5 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 3 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum5.4 mg/L≤ 1.8 mg/L200%
October 2025Nitrogen, ammonia total [as N], monthly average4.34 mg/L≤ .9 mg/L382%
November 2025Nitrogen, ammonia total [as N], daily maximum3.97 mg/L≤ 3.4 mg/L17%
November 2025Nitrogen, ammonia total [as N], monthly average2.3 mg/L≤ 1.7 mg/L35%
December 2025Nitrogen, ammonia total [as N], monthly average1.99 mg/L≤ 1.7 mg/L17%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, settleabledaily maximum≤ 1 mL/Lall year
Nitrogen, ammonia total [as N]monthly average≤ .9 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1.7 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1.8 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 3.4 mg/LJan, Feb, Mar, Apr, Nov, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .01 mg/Lall year
Chlorine, total residualdaily maximum≤ .02 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 410 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/Lall year

How strict are these limits?

Cited limits by parameter: Tennessee'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/TN0024643 · MCP: https://passage-data.com/mcp