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City of Memphis

Sewage treatment plant, major discharger, Memphis, Tennessee. NPDES permit TN0020711 expired Dec 31, 2016; its limits still apply. Last 12 months: over a limit 5 times (last May 2026), 1 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form G monthly (70 values), form Y yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
39 values over a limit, 0 required values missing, 0 of 13 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, daily maximum105 mg/L≤ 86.1 mg/L22%
March 2026BOD, 5-day, 20 deg. C, daily maximum152 mg/L≤ 86.1 mg/L77%
March 2026BOD, 5-day, 20 deg. C, monthly average43.3 mg/L≤ 43.1 mg/L0%
March 2026BOD, 5-day, 20 deg. C, weekly average66.4 mg/L≤ 64.7 mg/L3%
May 2026BOD, 5-day, 20 deg. C, daily maximum87 mg/L≤ 86.1 mg/L1%

Limits in force (74)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 1 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 43.1 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 64.7 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 86.1 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 52 mg/Lall year
Solids, total suspendedweekly average≤ 78 mg/Lall year
Solids, total suspendeddaily maximum≤ 104 mg/Lall year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all 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]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (%)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (%)all year
Dioxinmonthly average≤ 1 pg/Lall year
Dioxindaily maximumreport only (mg/L)all year
Dioxindaily maximum≤ 1 pg/Lall year
Benzidinemonthly averagereport only (mg/L)all year
Benzidinedaily maximumreport only (mg/L)all year
DDTmonthly average≤ .000001 mg/Lall year
Dieldrinmonthly average≤ .0000014 mg/Lall year
Polychlorinated biphenyls [PCBs]monthly average≤ .00000064 mg/Lall year
Polychlorinated biphenyls [PCBs]daily maximum≤ .00000064 mg/Lall year
Hexachlorobenzenemonthly averagereport only (mg/L)all year
Hexachlorobenzenedaily maximumreport only (mg/L)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 residualinstantaneous maximum≤ 2 mg/Lall year
Chlordanemonthly average≤ .0000081 mg/Lall year
Chlordanedaily maximum≤ .0000081 mg/Lall year
E. colimonthly geometric meanreport only (CFU/100mL)all year
E. colidaily maximumreport only (CFU/100mL)all year
E. colimonthly geometric mean≤ 126 CFU/100mLall year
E. colidaily maximum≤ 487 CFU/100mLall year
Sewer Backupsmonthly totalreport only (occur/mo)all year
Mercury, total [as Hg]monthly averagereport only (mg/L)all year
Mercury, total [as Hg]daily maximumreport only (mg/L)all year
Overflowsmonthly totalreport only (occur/mo)all year
Overflowsmonthly totalreport only (occur/mo)all year
Organic pesticide chemicals [40 CFR455]monthly averagereport only (mg/L)all year
Organic pesticide chemicals [40 CFR455]daily maximumreport only (mg/L)all year
Organic pesticide chemicals [40 CFR455]daily maximumreport only (mg/L)all year
Methylmercurymonthly averagereport only (mg/L)all year
Methylmercurydaily maximumreport only (mg/L)all year
Bypass valvemonthly totalreport only (occur/mo)all year
BOD, 5-day, percent removaldaily minimum≥ 40 %all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removaldaily minimum≥ 40 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
LC50 Static 48Hr Acute Ceriodaphnia dubiavaluereport only (%)all year
LC50 Static 48Hr Acute Pimephales promelasvaluereport only (%)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/TN0020711 · MCP: https://passage-data.com/mcp