CHESTER SEWER DISTRICT

NPDES permit SC0036056 · Major POTW · administratively continued, expires 2025-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2025-06-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

1values over a limit
0required values missing, on 0 form(s)
6of 30 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (1).

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (94)

OutfallParameterStatisticLimitMonths
001Oxygen demand, ultimateMO AVG <= 263 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateMO AVG <= 281 lb/d Jan, Feb, Nov, Dec
001Oxygen demand, ultimateMO AVG = 263 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateMO AVG = 281 lb/d Jan, Feb, Nov, Dec
001Oxygen demand, ultimateWKLY AVG <= 395 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateWKLY AVG <= 422 lb/d Jan, Feb, Nov, Dec
001Oxygen demand, ultimateWKLY AVG = 395 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateWKLY AVG = 422 lb/d Jan, Feb, Nov, Dec
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001Oxygen, dissolved [DO]MINIMUM = 6 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG = 10 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG = 15 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG = 334 lb/d all year
001BOD, 5-day, 20 deg. CMO AVG <= 133 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG = 500 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 200 lb/d all year
001pHMINIMUM = 6 SU all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM = 8.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMO AVG = 30 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG = 45 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG = 1001 lb/d all year
001Solids, total suspendedMO AVG <= 400 lb/d all year
001Solids, total suspendedWKLY AVG = 1502 lb/d all year
001Solids, total suspendedWKLY AVG <= 600 lb/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]WKLY AVG report only all year
001Nitrogen, total [as N]WKLY AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]WKLY AVG report only all year
001Nitrogen, total [as N]WKLY AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 2.14 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.8 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG = 6.5 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG = 3.2 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.21 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 2.7 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG = 9.8 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG = 4.8 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 29 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 24 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG = 217 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG = 107 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 43 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 36 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG = 325 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG = 160 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG <= 2 mg/L all year
001Phosphorus, total [as P]MO AVG = 2 mg/L all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]MO AVG = 520 lb/d all year
001Phosphorus, total [as P]MO AVG <= 520 lb/yr all year
001Phosphorus, total [as P]MO AVG = 4124.5 lb/d all year
001Phosphorus, total [as P]MO AVG = 4124.5 lb/d all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Hardness, total [as CaCO3]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantWKLY AVG report only all year
001Flow, in conduit or thru treatment plantWKLY AVG report only all year
001Chlorine, total residualMO AVG <= .011 mg/L all year
001Chlorine, total residualMO AVG = .011 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Chlorine, total residualDAILY MX = .019 mg/L all year
001Chlorine, total residualMO AVG <= .15 lb/d all year
001Chlorine, total residualMO AVG = .37 lb/d all year
001Chlorine, total residualDAILY MX <= .25 lb/d all year
001Chlorine, total residualDAILY MX = .63 lb/d all year
001E. coli30DAVGEO = 126 MPN/100mL all year
001E. coliMO AVG <= 126 MPN/100mL all year
001E. coliDAILY MX = 349 MPN/100mL all year
001E. coliDAILY MX <= 349 MPN/100mL all year
001E. coli30DAVGEO <= 126 MPN/100mL all year
001E. coli30DAVGEO = 126 MPN/100mL all year
001E. coliDAILY MX <= 800 MPN/100mL all year
001E. coliDAILY MX = 800 MPN/100mL all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001Mercury, total [as Hg]MO AVG report only all year
001Mercury, total [as Hg]DAILY MX report only all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001BOD, 5-day, percent removalMO AV MN = 85 % all year
001Solids, suspended percent removalMO AV MN = 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AVG <= 25 % all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 40 % all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states