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

Chester Sewer District

Sewage treatment plant, major discharger, Lando, South Carolina. NPDES permit SC0001741 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 2 times (last June 2026), 26 of 79 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (35 values), form 1A monthly (39 values), form 1B monthly (39 values), form 4 monthly (1 value), form 4A monthly (1 value), form 2 quarterly, and 5 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 21 of 84 reports late

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

Period endingParameterReportedLimitOver by
June 2026BOD, 5-day, 20 deg. C, monthly average14.8≤ 14 mg/L6%
June 2026BOD, 5-day, 20 deg. C, weekly average28.3≤ 21 mg/L35%

Limits in force (138)

ParameterStatisticLimitMonths
Oxygen demand, ultimatemonthly average≤ 292 lb/dall year
Oxygen demand, ultimatemonthly average≤ 538 lb/dall year
Oxygen demand, ultimatemonthly average≤ 403 lb/dall year
Oxygen demand, ultimateweekly averagereport only (lb/d)all year
Oxygen demand, ultimateweekly averagereport only (lb/d)all year
Oxygen demand, ultimateweekly averagereport only (lb/d)all year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 11.4 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 14 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 17.1 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 21 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 334 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 190 lb/dall year
BOD, 5-day, 20 deg. Cmonthly average≤ 141 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 501 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 285 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 212 lb/dall year
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
pHdaily maximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 500 lb/dall year
Solids, total suspendedmonthly average≤ 1001 lb/dall year
Solids, total suspendedmonthly average≤ 300 lb/dall year
Solids, total suspendedweekly average≤ 750 lb/dall year
Solids, total suspendedweekly average≤ 1502 lb/dall year
Solids, total suspendedweekly average≤ 450 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]weekly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all year
Nitrogen, total [as N]weekly averagereport only (lb/d)all year
Nitrogen, total [as N]weekly averagereport only (lb/d)all year
Nitrogen, total [as N]weekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 4.7 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5.8 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4.3 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 7.1 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 8.7 mg/LMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 6.5 mg/LMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 78 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 58 lb/dMar–Oct
Nitrogen, ammonia total [as N]monthly average≤ 143 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 118 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 87 lb/dMar–Oct
Nitrogen, ammonia total [as N]weekly average≤ 217 lb/dMar–Oct
Phosphorus, total [as P]monthly average≤ 2 mg/Lall year
Phosphorus, total [as P]monthly average≤ 2 mg/Lall year
Phosphorus, total [as P]monthly average≤ 2 mg/Lall year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]weekly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly average≤ 1512 lb/dall year
Phosphorus, total [as P]monthly average≤ 1512 lb/dall year
Phosphorus, total [as P]monthly average≤ 1512 lb/dall year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Phosphorus, total [as P]weekly averagereport only (lb/d)all year
Cadmium, total [as Cd]monthly average≤ .0017 mg/Lall year
Cadmium, total [as Cd]monthly average≤ .0013 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .012 mg/Lall year
Cadmium, total [as Cd]daily maximum≤ .01 mg/Lall year
Cadmium, total [as Cd]monthly average≤ .03 lb/dall year
Cadmium, total [as Cd]monthly average≤ .043 lb/dall year
Cadmium, total [as Cd]daily maximum≤ .2 lb/dall year
Cadmium, total [as Cd]daily maximum≤ .33 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantweekly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .036 mg/Lall year
Chlorine, total residualmonthly average≤ .019 mg/Lall year
Chlorine, total residualmonthly average≤ .026 mg/Lall year
Chlorine, total residualdaily maximum≤ .062 mg/Lall year
Chlorine, total residualdaily maximum≤ .032 mg/Lall year
Chlorine, total residualdaily maximum≤ .046 mg/Lall year
Chlorine, total residualmonthly average≤ .36 lb/dall year
Chlorine, total residualmonthly average≤ .63 lb/dall year
Chlorine, total residualmonthly average≤ .43 lb/dall year
Chlorine, total residualdaily maximum≤ .62 lb/dall year
Chlorine, total residualdaily maximum≤ 1.1 lb/dall year
Chlorine, total residualdaily maximum≤ .77 lb/dall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. colidaily maximum≤ 349 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. coli30-day geometric mean≤ 126 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year
E. colidaily maximum≤ 800 MPN/100mLall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
LC50 Static 48Hr Acute Ceriodaphnia dubiadaily minimumreport only (%)all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiamonthly average≤ 25 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year
%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximum≤ 40 %all year
Pass/Fail Static 48Hr Acute Ceriodaphnia dubiadaily maximum≤ 0 pass=0;fail=1all year
Pass/Fail Static 48Hr Acute Ceriodaphnia dubiadaily maximum≤ 0 pass=0;fail=1all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily minimumreport only (%)all year

How strict are these limits?

Cited limits by parameter: South Carolina'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/SC0001741 · MCP: https://passage-data.com/mcp