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Entergy Mississippi Attala Plant

Electric Services, major discharger, Sallis, Mississippi. NPDES permit MS0056928, in force until Oct 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (24 values), outfall 002 form A monthly (12 values)
Renewal application due
May 4, 2028 · 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, 2 of 24 reports late

Limits in force (36)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)all year001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)May–Oct001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)May–Oct001
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)May–Oct001
Temperature, water deg. fahrenheitdaily maximumreport only (deg F)May–Oct001
Temp. diff. between samp. & upstrm deg. Fdaily maximum≤ 5 deg FMay–Oct001
Specific conductancemonthly averagereport only (umho/cm)all year001
Specific conductancedaily maximumreport only (umho/cm)all year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Zinc, total recoverablemonthly average≤ 1 mg/Lall year001
Zinc, total recoverabledaily maximum≤ 1 mg/Lall year001
Zinc, total recoverablemonthly average≤ 12.18 lb/dall year001
Zinc, total recoverabledaily maximum≤ 12.18 lb/dall year001
Chromium, total recoverablemonthly average≤ .2 mg/Lall year001
Chromium, total recoverabledaily maximum≤ .2 mg/Lall year001
Chromium, total recoverablemonthly average≤ 2.44 lb/dall year001
Chromium, total recoverabledaily maximum≤ 2.44 lb/dall 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≤ .1 mg/Lall year001
Chlorine, total residualdaily maximum≤ .1 mg/Lall year001
Chlorine, free availablemonthly average≤ .035 mg/Lall year001
Chlorine, free availabledaily maximum≤ .035 mg/Lall year001
pHminimum≥ 6 SUall year002
pHmonthly maximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendedmonthly maximum≤ 100 mg/Lall year002
Solids, total suspendedmonthly average≤ 18 lb/dall year002
Solids, total suspendedmonthly maximum≤ 60 lb/dall year002
Oil & Greasemonthly average≤ 15 mg/Lall year002
Oil & Greasemonthly maximum≤ 20 mg/Lall year002
Oil & Greasemonthly average≤ 9 lb/dall year002
Oil & Greasemonthly maximum≤ 12 lb/dall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly maximumreport only (MGD)all year002

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

Your permit document is the final word. As JSON: /api/v1/permits/MS0056928 · MCP: https://passage-data.com/mcp