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Tennessee State Parks

Sewage treatment plant, Roan Mountain, Tennessee. NPDES permit TN0074357, in force until Nov 30, 2026. Last 12 months: over a limit 15 times (last August 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (15 values)
Renewal application due
Jun 3, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 1 of 12 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum5.58 mg/L≤ 4 mg/L40%
October 2025Nitrogen, ammonia total [as N], monthly average3.34 mg/L≤ 2 mg/L67%
December 2025E. coli, daily maximum> 2420 #/100mL≤ 487 #/100mL—
December 2025Nitrogen, ammonia total [as N], daily maximum31.5 mg/L≤ 10 mg/L215%
December 2025Nitrogen, ammonia total [as N], monthly average< 7.493 mg/L≤ 5 mg/L50%
January 2026Nitrogen, ammonia total [as N], daily maximum20.1 mg/L≤ 10 mg/L101%
January 2026Nitrogen, ammonia total [as N], monthly average9.161 mg/L≤ 5 mg/L83%
April 2026Nitrogen, ammonia total [as N], monthly average5.658 mg/L≤ 5 mg/L13%
June 2026Nitrogen, ammonia total [as N], daily maximum10.4 mg/L≤ 4 mg/L160%
June 2026Nitrogen, ammonia total [as N], monthly average4.23 mg/L≤ 2 mg/L112%
June 2026Solids, total suspended, daily maximum55 mg/L≤ 45 mg/L22%
July 2026Nitrogen, ammonia total [as N], daily maximum8.98 mg/L≤ 4 mg/L125%
July 2026Nitrogen, ammonia total [as N], monthly average≥ 4.688 mg/L≤ 2 mg/L134%
August 2026Nitrogen, ammonia total [as N], daily maximum5.94 mg/L≤ 4 mg/L49%
August 2026Nitrogen, ammonia total [as N], monthly average2.02 mg/L≤ 2 mg/L1%

Limits in force (17)

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≤ 2 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 10 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 residualdaily maximum≤ .6 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 487 #/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/TN0074357 · MCP: https://passage-data.com/mcp