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University of Mississippi, the

Sewage treatment plant, Oxford, Mississippi. NPDES permit MS0021873, in force until May 31, 2028. Last 12 months: over a limit 15 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (61 values), form Q quarterly (2 values)
Renewal application due
Dec 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
21 values over a limit, 0 required values missing, 0 of 16 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
October 2025Copper, total recoverable, monthly average.0093 mg/L≤ .008 mg/L16%
October 2025Copper, total recoverable, maximum weekly average.0093 mg/L≤ .0087 mg/L7%
November 2025Copper, total recoverable, monthly average.0105 mg/L≤ .008 mg/L31%
November 2025Copper, total recoverable, maximum weekly average.0105 mg/L≤ .0087 mg/L21%
January 2026Copper, total recoverable, monthly average.014 mg/L≤ .008 mg/L75%
January 2026Copper, total recoverable, maximum weekly average.014 mg/L≤ .0087 mg/L61%
February 2026Copper, total recoverable, monthly average.0104 mg/L≤ .008 mg/L30%
February 2026Copper, total recoverable, maximum weekly average.0104 mg/L≤ .0087 mg/L20%
March 2026Copper, total recoverable, monthly average.01085 mg/L≤ .008 mg/L36%
March 2026Copper, total recoverable, maximum weekly average.01085 mg/L≤ .0087 mg/L25%
April 2026Copper, total recoverable, monthly average.00845 mg/L≤ .008 mg/L6%
May 2026Copper, total recoverable, monthly average.009 mg/L≤ .008 mg/L13%
May 2026Copper, total recoverable, maximum weekly average.009 mg/L≤ .0087 mg/L3%
July 2026Copper, total recoverable, monthly average.0081 mg/L≤ .008 mg/L1%
August 2026Copper, total recoverable, monthly average.0082 mg/L≤ .008 mg/L3%

Limits in force (63)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimumreport only (mg/L)all year
Oxygen, dissolved [DO]maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 125 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 188 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
pHminimumreport only (SU)all year
pHmaximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 375 lb/dall year
Solids, total suspendedmaximum weekly average≤ 563 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.37 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.1 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 17 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 26 lb/dall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximum weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum weekly averagereport only (lb/d)all year
Zinc, total recoverablemonthly average≤ .065 mg/Lall year
Zinc, total recoverablemaximum weekly average≤ .065 mg/Lall year
Copper, total recoverablemonthly average≤ .008 mg/Lall year
Copper, total recoverablemaximum weekly average≤ .0087 mg/Lall year
Flow, in conduit or thru treatment plantmonthly average≤ .99 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .011 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .019 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
Sludge settleability 30 minuteminimumreport only (mL/L)all year
Sludge settleability 30 minutemaximumreport only (mL/L)all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 100 %all year

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/MS0021873 · MCP: https://passage-data.com/mcp