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Giles County Board of Education

Sewage treatment plant, Lynnville, Tennessee. NPDES permit TN0054810, in force until Feb 28, 2027. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (16 values)
Renewal application due
Sep 1, 2026 · 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 12 reports late

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

Period endingParameterReportedLimitOver by
April 2026E. coli, geometric mean227.4 #/100mL≤ 126 #/100mL80%
May 2026E. coli, daily maximum1119.9 #/100mL≤ 941 #/100mL19%
May 2026E. coli, geometric mean455.2 #/100mL≤ 126 #/100mL261%
August 2026Nitrogen, ammonia total [as N], daily maximum11.1 mg/L≤ 10 mg/L11%
August 2026Nitrogen, ammonia total [as N], monthly average6.1 mg/L≤ 5 mg/L22%

Limits in force (18)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 3 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≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 15 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≤ .47 mg/Lall year
Chlorine, total residualdaily maximum≤ .81 mg/Lall year
E. coligeometric mean≤ 126 #/100mLall year
E. colidaily maximum≤ 941 #/100mLall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 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/TN0054810 · MCP: https://passage-data.com/mcp