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Lafayette County Industrial Park

Sewage treatment plant, Oxford, Mississippi. NPDES permit MS0043079, in force until Oct 31, 2029. Last 12 months: over a limit 10 times (last June 2026), 4 required values missing, 3 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (21 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
February 2026Oxygen, dissolved [DO], minimum4.2 mg/L≥ 6 mg/L30%
May 2026BOD, 5-day, 20 deg. C, daily maximum28.5 mg/L≤ 25.5 mg/L12%
May 2026BOD, 5-day, 20 deg. C, monthly average21 mg/L≤ 17 mg/L24%
May 2026Nitrogen, ammonia total [as N], daily maximum13 mg/L≤ 3 mg/L333%
May 2026Nitrogen, ammonia total [as N], daily maximum15.5 lb/d≤ 7.5 lb/d107%
May 2026Nitrogen, ammonia total [as N], monthly average7.33 mg/L≤ 2 mg/L267%
May 2026Nitrogen, ammonia total [as N], monthly average8.54 lb/d≤ 5 lb/d71%
May 2026Solids, total suspended, daily maximum54 mg/L≤ 45 mg/L20%
May 2026Solids, total suspended, monthly average43 mg/L≤ 30 mg/L43%
June 2026Oxygen, dissolved [DO], minimum5.2 mg/L≥ 6 mg/L13%

Limits in force (21)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 17 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 25.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 42.5 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 63.8 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 75.1 lb/dall year
Solids, total suspendeddaily maximum≤ 112.6 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 7.5 lb/dall year
Flow, in conduit or thru treatment plantmonthly average≤ .3 MGDall 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
E. colimonthly average≤ 126 #/100mLall year
E. colidaily maximum≤ 410 #/100mLall year

New limits from Nov 19, 2027

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Nitrogen, ammonia total [as N], daily maximum5.15 lb/dtighter1.31 lb/d (10 values)0.254×
Nitrogen, ammonia total [as N], daily maximum2.05 mg/Ltighter1.42 mg/L (10 values)0.693×
Nitrogen, ammonia total [as N], monthly average3.43 lb/dtighter1.108 lb/d (10 values)0.323×
Nitrogen, ammonia total [as N], monthly average1.37 mg/Ltighter1.282 mg/L (10 values)0.936×

How strict are these limits?

Cited limits by parameter: Mississippi'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/MS0043079 · MCP: https://passage-data.com/mcp