FLORENCE CITY OF

NPDES permit SC0025356 · Major POTW · administratively continued, expires 2026-06-30 · 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.

This permit expired on 2026-06-30 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

4values over a limit
0required values missing, on 0 form(s)
0of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total [as Cu] (4).

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 (51)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 7.5 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 11.25 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CMO AVG <= 125 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CMO AVG <= 166.8 lb/d Jan, Feb, Nov, Dec
001BOD, 5-day, 20 deg. CWKLY AVG <= 188 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, 5-day, 20 deg. CWKLY AVG <= 250.2 lb/d Jan, Feb, Nov, Dec
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 500 lb/d all year
001Solids, total suspendedWKLY AVG <= 750 lb/d 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]MO AVG report only all year
001Nitrogen, total [as N]WKLY AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 2.5 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= .5 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.75 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= .75 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 42 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 8 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 63 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 12 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]WKLY AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]WKLY AVG report only all year
001Copper, total [as Cu]MO AVG <= .0057 mg/L all year
001Copper, total [as Cu]DAILY MX <= .0074 mg/L all year
001Copper, total [as Cu]MO AVG <= .1 lb/d all year
001Copper, total [as Cu]DAILY MX <= .12 lb/d 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
001Chlorine, total residualMO AVG <= .011 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Chlorine, total residualMO AVG <= .18 lb/d all year
001Chlorine, total residualDAILY MX <= .32 lb/d all year
001E. coli30DAVGEO <= 126 MPN/100mL all year
001E. coliDAILY MX <= 349 MPN/100mL all year
001E. coli30DAVGEO <= 126 MPN/100mL all year
001E. coliDAILY MX <= 800 MPN/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
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
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