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Tennessee Valley Authority (TVA)

Federal facility (Electric Services), major discharger, Spring City, Tennessee. NPDES permit TN0020168, in force until Jan 31, 2027. Last 12 months: no values over a limit, 6 of 72 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 101 form G monthly (15 values), outfall 102 form G monthly (15 values), outfall 103 form G monthly (8 values), outfall 107 form G monthly (14 values), outfall 113 form G monthly (20 values), outfall V001 form G monthly (4 values)
Renewal application due
Aug 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 72 reports late

Limits in force (76)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximum≤ 35 deg Call year101
pHminimum≥ 6 SUall year101
pHmaximum≤ 9 SUall year101
Solids, total suspendedmonthly average≤ 30 mg/Lall year101
Solids, total suspendeddaily maximum≤ 100 mg/Lall year101
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year101
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year101
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year101
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year101
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
Chlorine, total residualdaily maximum≤ .2 mg/Lall year101
Discharge event observation [Visual Monitoring]totalreport only (N=0;Y=1)all year101
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 4 %all year101
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 4 %all year101
Temperature, water deg. centigradedaily maximum≤ 35 deg Call year102
pHminimum≥ 6 SUall year102
pHmaximum≤ 9 SUall year102
Solids, total suspendedmonthly average≤ 30 mg/Lall year102
Solids, total suspendeddaily maximum≤ 100 mg/Lall year102
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year102
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year102
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year102
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year102
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year102
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year102
Chlorine, total residualdaily maximum≤ .2 mg/Lall year102
Discharge event observation [Visual Monitoring]totalreport only (N=0;Y=1)all year102
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 4 %all year102
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 4 %all year102
pHminimum≥ 6 SUall year103
pHmaximum≤ 9 SUall year103
Solids, total suspendedmonthly average≤ 30 mg/Lall year103
Solids, total suspendeddaily maximum≤ 100 mg/Lall year103
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year103
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year103
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year103
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year103
pHminimumreport only (SU)all year107
pHmaximumreport only (SU)all year107
Solids, total suspendedmonthly average≤ 30 mg/Lall year107
Solids, total suspendeddaily maximum≤ 100 mg/Lall year107
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year107
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year107
Phosphorus, total [as P]monthly average≤ 1 mg/Lall year107
Phosphorus, total [as P]daily maximum≤ 1 mg/Lall year107
Copper, total [as Cu]monthly average≤ 1 mg/Lall year107
Copper, total [as Cu]daily maximum≤ 1 mg/Lall year107
Iron, total [as Fe]monthly average≤ 1 mg/Lall year107
Iron, total [as Fe]daily maximum≤ 1 mg/Lall year107
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year107
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year107
Temperature, water deg. centigradedaily maximumreport only (deg C)all year113
Temperature, water deg. centigradedaily maximum≤ 33.5 deg Call year113
Temperature, water deg. centigradedaily maximum≤ 30.5 deg Call year113
Temp. diff. between samp. & upstrm deg. Cdaily maximum≤ 3 deg Call year113
pHminimum≥ 6 SUall year113
pHmaximum≤ 9 SUall year113
Solids, total suspendedmonthly average≤ 30 mg/Lall year113
Solids, total suspendeddaily maximum≤ 100 mg/Lall year113
Oil and grease, hexane extr methodmonthly average≤ 15 mg/Lall year113
Oil and grease, hexane extr methoddaily maximum≤ 20 mg/Lall year113
Chromium, total [as Cr]daily maximum≤ .2 mg/Lall year113
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year113
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year113
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year113
Chlorine, total residualmonthly averagereport only (mg/L)all year113
Chlorine, total residualdaily maximumreport only (mg/L)all year113
Temperature rate of change deg. C/hrdaily maximum≤ 2 deg C/hrall year113
Discharge event observation [Visual Monitoring]totalreport only (N=0;Y=1)all year113
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 12.7 %all year113
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 12.7 %all year113
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearV001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearV001
Chlorine, total residualmonthly average≤ .07 mg/Lall yearV001
Chlorine, total residualdaily maximum≤ .12 mg/Lall yearV001

How strict are these limits?

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

Same industry: the 15 Electric Services permits in Tennessee.

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/TN0020168 · MCP: https://passage-data.com/mcp