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Crystal Springs Potw

Sewage treatment plant, Crystal Springs, Mississippi. NPDES permit MS0041874, in force until Jul 31, 2027. Last 12 months: over a limit 22 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form Q quarterly (2 values), form Y yearly
Renewal application due
Feb 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
16 values over a limit, 0 required values missing, 0 of 5 reports late

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

All 22 values over a limit
Period endingParameterReportedLimitOver by
December 2025%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum63.37 %≥ 81.41 %22%
December 2025BOD, 5-day, 20 deg. C, maximum monthly average64 mg/L≤ 16 mg/L300%
December 2025BOD, 5-day, 20 deg. C, maximum monthly average773 lb/d≤ 132 lb/d486%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average64 mg/L≤ 24 mg/L167%
December 2025BOD, 5-day, 20 deg. C, maximum weekly average773 lb/d≤ 198 lb/d290%
December 2025BOD, 5-day, percent removal, minimum69.25 %≥ 85 %105%
December 2025Copper, total recoverable, maximum monthly average.007 mg/L≤ .0061 mg/L15%
December 2025E. coli, maximum monthly average> 2420 #/100mL≤ 126 #/100mL—
December 2025E. coli, maximum weekly average> 2420 #/100mL≤ 410 #/100mL—
December 2025Flow, in conduit or thru treatment plant, maximum monthly average2.677 MGD≤ .99 MGD170%
December 2025Nitrogen, ammonia total [as N], maximum monthly average81.38 lb/d≤ 13.2 lb/d517%
December 2025Nitrogen, ammonia total [as N], maximum monthly average9.01 mg/L≤ 1.6 mg/L463%
December 2025Nitrogen, ammonia total [as N], maximum weekly average81.32 lb/d≤ 19.8 lb/d311%
December 2025Nitrogen, ammonia total [as N], maximum weekly average9.01 mg/L≤ 2.4 mg/L275%
December 2025Oxygen, dissolved [DO], minimum4.22 mg/L≥ 6 mg/L30%
December 2025Solids, suspended percent removal, minimum82 %≥ 85 %20%
December 2025Solids, total suspended, maximum monthly average47 mg/L≤ 30 mg/L57%
December 2025Solids, total suspended, maximum monthly average611 lb/d≤ 248 lb/d146%
December 2025Solids, total suspended, maximum weekly average47 mg/L≤ 45 mg/L4%
December 2025Solids, total suspended, maximum weekly average611 lb/d≤ 372 lb/d64%
December 2025pH, minimum2.93 SU≥ 6 SU—
June 2026%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum61.51 %≥ 81.41 %24%

Limits in force (47)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 16 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 24 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 132 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 198 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≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmaximum monthly average≤ 248 lb/dall year
Solids, total suspendedmaximum weekly average≤ 372 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, ammonia total [as N]maximum monthly average≤ 2 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 1.6 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.4 mg/Lall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 16.5 lb/dall year
Nitrogen, ammonia total [as N]maximum monthly average≤ 13.2 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 25 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 19.8 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
Lead, total recoverablemaximum monthly average≤ .0014 mg/Lall year
Lead, total recoverablemaximum weekly average≤ .0369 mg/Lall year
Copper, total recoverablemaximum monthly average≤ .0061 mg/Lall year
Copper, total recoverablemaximum weekly average≤ .0086 mg/Lall year
Rainfallmaximum monthly averagereport only (in)all year
Rainfallmaximum weekly averagereport only (in)all year
Flow, in conduit or thru treatment plantmaximum monthly average≤ .99 MGDall year
Flow, in conduit or thru treatment plantmaximum weekly averagereport only (MGD)all year
Chlorine, total residualmaximum monthly average≤ .014 mg/Lall year
Chlorine, total residualmaximum weekly average≤ .023 mg/Lall year
E. colimaximum monthly 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
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 81.41 %all year
%Effect Static Renewal 7Day Chronic Pimephales promelasminimum≥ 81.41 %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/MS0041874 · MCP: https://passage-data.com/mcp