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Metro Water Services (DRY CREEK STP)

Sewage treatment plant, major discharger, Nashville, Tennessee. NPDES permit TN0020648 expired Oct 31, 2025; its limits still apply. Last 12 months: over a limit 8 times (last July 2026), 5 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (40 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimit
December 2025SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo
December 2025SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo
January 2026SSO, Wet Weather, monthly total2 occur/mo≤ 0 occur/mo
February 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo
March 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo
April 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo
July 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo
July 2026SSO, Wet Weather, monthly total3 occur/mo≤ 0 occur/mo

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 40 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 6005 lb/dall year
Solids, total suspendedweekly average≤ 8006 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, settleabledaily maximum≤ 1 mL/Lall year
Nitrogen, total [as N]daily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 2002 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 3002 lb/dall year
Phosphorus, total [as P]daily maximumreport only (lb/d)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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 1.04 mg/Lall year
E. colimonthly geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 487 MPN/100mLall year
SSO, Dry Weathermonthly total≤ 0 occur/moall year
SSO, Wet Weathermonthly total≤ 0 occur/moall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 35 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5004 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 7006 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all year
BOD, carbonaceous, percent removaldaily minimum≥ 40 %all year
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removaldaily minimum≥ 40 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 1.4 %all year
IC25 Static Renewal 7 Day Chronic Pimephalesminimum≥ 1.4 %all year

How strict are these limits?

Cited limits by parameter: Tennessee's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0020648 · MCP: https://passage-data.com/mcp