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Metro Water Services

Sewage treatment plant, Nashville, Tennessee. NPDES permit TN0028550, in force until Jun 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (14 values)
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (16)

ParameterStatisticLimitMonths
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
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)May–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, Apr, Nov, Dec
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)May–Oct
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, Nov, Dec
Chlorine, total residualmonthly average≤ .3 mg/Lall year
Chlorine, total residualdaily maximum≤ .5 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/TN0028550 · MCP: https://passage-data.com/mcp