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Entergy Mississippi LLC, Choctaw County Generating Station

Electric Services, major discharger, French Camp, Mississippi. NPDES permit MS0057606, in force until Apr 30, 2028. Last 12 months: over a limit 2 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (31 values)
Renewal application due
Nov 2, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
July 2026Nitrogen, ammonia total [as N], daily maximum4.0018 lb/d≤ 2 lb/d100%
July 2026Nitrogen, ammonia total [as N], daily maximum4.4 mg/L≤ 2.06 mg/L114%

Limits in force (35)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year
Temperature, water deg. fahrenheitdaily maximum≤ 90 deg Fall year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 100 mg/Lall year
Solids, total suspendedmonthly average≤ 29 lb/dall year
Solids, total suspendeddaily maximum≤ 95 lb/dall year
Oil & Greasemonthly average≤ 15 mg/Lall year
Oil & Greasedaily maximum≤ 20 mg/Lall year
Oil & Greasemonthly average≤ 14.3 lb/dall year
Oil & Greasedaily maximum≤ 19 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.37 mg/Lall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximum≤ 2.06 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.3 lb/dall year
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dall year
Phosphorus, total [as P]monthly averagereport only (lb/d)all 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
Chlorine, total residualmonthly average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Solids, total dissolvedmonthly average≤ 750 mg/Lall year
Solids, total dissolveddaily maximum≤ 1500 mg/Lall year
Solids, total dissolvedmonthly averagereport only (lb/d)all year
Solids, total dissolveddaily maximumreport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 9 mg/Lall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 13.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 8.6 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)all year

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/MS0057606 · MCP: https://passage-data.com/mcp