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Clarksdale Public Utilities, Lewis L Wilkins Generating Station

Electric Services, Clarksdale, Mississippi. NPDES permit MS0001139, in force until Sep 30, 2031. Last 12 months: no values over a limit, 5 of 31 reports late. Source: EPA ECHO, Oct 22, 2026.

Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 36 reports late

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year001
Temperature, water deg. fahrenheitdaily maximum≤ 90 deg Fall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Iron, total recoverablemonthly averagereport only (mg/L)all year001
Iron, total recoverabledaily maximumreport only (mg/L)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .011 mg/Lall year001
Chlorine, total residualdaily maximum≤ .019 mg/Lall year001
Chlorination durationdaily maximum≤ 120 minall year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year002
Temperature, water deg. fahrenheitdaily maximum≤ 90 deg Fall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Iron, total recoverablemonthly averagereport only (mg/L)all year002
Iron, total recoverabledaily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Chlorine, total residualmonthly average≤ .011 mg/Lall year002
Chlorine, total residualdaily maximum≤ .019 mg/Lall year002
Chlorination durationdaily maximum≤ 120 minall year002
pHminimum≥ 6 SUall year101
pHmaximum≤ 9 SUall year101
Solids, total suspendedquarterly average≤ 30 mg/Lall year101
Solids, total suspendeddaily maximum≤ 100 mg/Lall year101
Oil & grease [freon extr.-IR meth] tot, RCquarterly average≤ 15 mg/Lall year101
Oil & grease [freon extr.-IR meth] tot, RCdaily maximum≤ 20 mg/Lall year101
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year101
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year101
pHminimum≥ 6 SUall year102
pHmaximum≤ 9 SUall year102
Solids, total suspendedquarterly average≤ 30 mg/Lall year102
Solids, total suspendeddaily maximum≤ 100 mg/Lall year102
Oil & grease [freon extr.-IR meth] tot, RCquarterly average≤ 15 mg/Lall year102
Oil & grease [freon extr.-IR meth] tot, RCdaily maximum≤ 20 mg/Lall year102
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year102
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year102
pHminimum≥ 6 SUall year201
pHmaximum≤ 9 SUall year201
Solids, total suspendedquarterly average≤ 30 mg/Lall year201
Solids, total suspendeddaily maximum≤ 100 mg/Lall year201
Oil & grease [freon extr.-IR meth] tot, RCquarterly average≤ 15 mg/Lall year201
Oil & grease [freon extr.-IR meth] tot, RCdaily maximum≤ 20 mg/Lall year201
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year201
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year201

How strict are these limits?

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

Same industry: the 20 Electric Services permits in Mississippi.

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On EPA ECHO: Facility report · DMR history

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