City of Dillon

NPDES permit SC0021776 · Major POTW · effective, expires 2028-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

4values over a limit
0required values missing, on 0 form(s)
0of 26 forms filed late

Last period with anything received: 2026-07-31. Most often over: E. coli (2), Nitrogen, ammonia total [as N] (2).

Reporting

Reports are due about 29 days after each monitoring period ends (the most common figure among SC permits in EPA's filings — check your permit).

Limits in force (82)

OutfallParameterStatisticLimitMonths
001Stream flow, instantaneousDAILY MN report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Oxygen demand, ultimateMO AVG <= 1522 lb/d Jan, Feb, Nov, Dec
001Oxygen demand, ultimateWKLY AVG report only Jan, Feb, Nov, Dec
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L Jan, Feb, Nov, Dec
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 1001 lb/d Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 334 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 1501 lb/d Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 500 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 6 SU Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 6 SU Jan, Feb, Nov, Dec
001pHMAXIMUM <= 8.5 SU Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001pHMAXIMUM <= 8.5 SU Jan, Feb, Nov, Dec
001Solids, total suspendedMO AVG <= 30 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Nov, Dec
001Solids, total suspendedWKLY AVG <= 45 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedWKLY AVG <= 45 mg/L Jan, Feb, Nov, Dec
001Solids, total suspendedMO AVG <= 1001 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMO AVG <= 1001 lb/d Jan, Feb, Nov, Dec
001Solids, total suspendedWKLY AVG <= 1501 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedWKLY AVG <= 1501 lb/d Jan, Feb, Nov, Dec
001Nitrogen, total [as N]MO AVG report only Jan, Feb, Nov, Dec
001Nitrogen, total [as N]MO AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]WKLY AVG report only Jan, Feb, Nov, Dec
001Nitrogen, total [as N]WKLY AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MO AVG report only Jan, Feb, Nov, Dec
001Nitrogen, total [as N]MO AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]WKLY AVG report only Jan, Feb, Nov, Dec
001Nitrogen, total [as N]WKLY AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 16.68 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 25.02 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 1.5 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 556 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 33.4 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 835 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 50 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG report only Jan, Feb, Nov, Dec
001Phosphorus, total [as P]MO AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]WKLY AVG report only Jan, Feb, Nov, Dec
001Phosphorus, total [as P]WKLY AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG report only Jan, Feb, Nov, Dec
001Phosphorus, total [as P]MO AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]WKLY AVG report only Jan, Feb, Nov, Dec
001Phosphorus, total [as P]WKLY AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Lead, total [as Pb]MO AVG report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]MO AVG report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only Jan, Feb, Nov, Dec
001Flow, in conduit or thru treatment plantMO AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Flow, in conduit or thru treatment plantWKLY AVG report only Jan, Feb, Nov, Dec
001Flow, in conduit or thru treatment plantWKLY AVG report only Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualMO AVG <= .098 mg/L Jan, Feb, Nov, Dec
001Chlorine, total residualMO AVG <= .098 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .169 mg/L Jan, Feb, Nov, Dec
001Chlorine, total residualDAILY MX <= .169 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualMO AVG <= 3.27 lb/d Jan, Feb, Nov, Dec
001Chlorine, total residualMO AVG <= 3.27 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= 5.64 lb/d Jan, Feb, Nov, Dec
001Chlorine, total residualDAILY MX <= 5.64 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coliMO AVG <= 126 MPN/100mL all year
001E. coliDAILY MX <= 349 MPN/100mL all year
001E. coliMO AVG <= 126 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 % Jan, Feb, Nov, Dec
001BOD, 5-day, percent removalMO AV MN >= 85 % Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, suspended percent removalMO AV MN >= 85 % Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Solids, suspended percent removalMO AV MN >= 85 % Jan, Feb, Nov, Dec
001LC50 Static 48Hr Acute Ceriodaphnia dubiaDAILY MN report only 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
001Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
001IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MN report only 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