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Campbell County Board of Education

Sewage treatment plant, Duff, Tennessee. NPDES permit TN0055239, in force until Feb 28, 2029. Last 12 months: over a limit 8 times (last April 2026), 6 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (32 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 8 of 12 reports late

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

Period endingParameterReportedLimitOver by
December 2025Nitrogen, ammonia total [as N], daily maximum24 mg/L≤ 2.5 mg/L860%
December 2025Nitrogen, ammonia total [as N], monthly average18.6 mg/L≤ 1.5 mg/L1140%
January 2026Nitrogen, ammonia total [as N], daily maximum6.8 mg/L≤ 2.5 mg/L172%
January 2026Nitrogen, ammonia total [as N], monthly average6.8 mg/L≤ 1.5 mg/L353%
March 2026pH, daily minimum5.2 SU≥ 6 SU—
April 2026Nitrogen, ammonia total [as N], daily maximum7.2 mg/L≤ 2.5 mg/L188%
April 2026Nitrogen, ammonia total [as N], monthly average7.2 mg/L≤ 1.5 mg/L380%
April 2026pH, daily minimum4.9 SU≥ 6 SU—

Limits in force (32)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Solids, total suspendeddaily maximum≤ 40 mg/Lall year
Solids, settleabledaily maximum≤ 1 mL/Lall year
Solids, settleabledaily maximum≤ 1 mL/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 1.5 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 2.5 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 2.5 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .4 mg/Lall year
Chlorine, total residualmonthly average≤ .4 mg/Lall year
Chlorine, total residualdaily maximum≤ .8 mg/Lall year
Chlorine, total residualdaily maximum≤ .8 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colimonthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 487 #/100mLall year
E. colidaily maximum≤ 487 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 35 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 35 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/TN0055239 · MCP: https://passage-data.com/mcp