Passage Data · Check a report · Use it from your AI

Jonestown Potw

Sewage treatment plant, Jonestown, Mississippi. NPDES permit MS0021075, in force until Sep 30, 2029. Last 12 months: over a limit 15 times (last December 2025), 1 of 1 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Y yearly
Last report on file
December 2025
Oct 2024 – Sep 2025
12 values over a limit, 0 required values missing, 0 of 1 report late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, 20 deg. C, maximum monthly average46 mg/L≤ 30 mg/L53%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average46 mg/L≤ 45 mg/L2%
December 2025Chlorine, total residual, maximum monthly average.17 mg/L≤ .077 mg/L121%
December 2025Chlorine, total residual, maximum weekly average.24 mg/L≤ .133 mg/L80%
December 2025E. coli, maximum monthly average172 #/100mL≤ 126 #/100mL37%
December 2025Flow, in conduit or thru treatment plant, maximum monthly average.1832 MGD≤ .166 MGD10%
December 2025Nitrogen, total [as N], maximum monthly average18 lb/d≤ 6.9 lb/d161%
December 2025Nitrogen, total [as N], maximum weekly average18 lb/d≤ 10.4 lb/d73%
December 2025Oxygen, dissolved [DO], minimum4 mg/L≥ 6 mg/L33%
December 2025Phosphorus, total [as P], maximum monthly average2.57 lb/d≤ 1.4 lb/d84%
December 2025Phosphorus, total [as P], maximum weekly average2.57 lb/d≤ 2.1 lb/d22%
December 2025Solids, suspended percent removal, minimum61 %≥ 65 %11%
December 2025Solids, total suspended, maximum monthly average153 mg/L≤ 90 mg/L70%
December 2025Solids, total suspended, maximum weekly average153 mg/L≤ 135 mg/L13%
December 2025pH, maximum9.5 SU≤ 9 SU—

Limits in force (39)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 41.5 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 62.3 lb/dall year
BOD, 5-day, 20 deg. Cmaximum monthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum monthly 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
Solids, total suspendedmaximum monthly average≤ 90 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 135 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 124.6 lb/dall year
Solids, total suspendedmaximum weekly average≤ 186.9 lb/dall year
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Solids, total suspendedmaximum monthly averagereport only (lb/d)all year
Solids, total suspendedmaximum weekly averagereport only (lb/d)all year
Nitrogen, total [as N]maximum monthly average≤ 6.9 lb/dall year
Nitrogen, total [as N]maximum weekly average≤ 10.4 lb/dall year
Nitrogen, ammonia total [as N]maximum 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]maximum monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum 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]maximum monthly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]maximum weekly averagereport only (lb/d)all year
Phosphorus, total [as P]maximum monthly average≤ 1.4 lb/dall year
Phosphorus, total [as P]maximum weekly average≤ 2.1 lb/dall year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .166 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .077 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .133 mg/Lall year
E. colimaximum monthly average≤ 126 #/100mLall year
E. colimaximum weekly average≤ 410 #/100mLall year
BOD, 5-day, percent removalminimum≥ 65 %all year
Solids, suspended percent removalminimum≥ 65 %all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/MS0021075 · MCP: https://passage-data.com/mcp