CALHOUN FALLS TOWN OF

NPDES permit SC0025721 · Minor POTW · administratively continued, expires 2018-07-31 · 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.

This permit expired on 2018-07-31 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

6values over a limit
36required values missing, on 3 form(s)
3of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: Chlorine, total residual (4), Solids, suspended percent removal (1), Nitrogen, ammonia total [as N] (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 (37)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 18 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 27 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 143 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 215 lb/d all year
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 <= 238 lb/d all year
001Solids, total suspendedWKLY AVG <= 357 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 2.1 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 4.4 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 3.2 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 6.6 mg/L Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 17 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MO AVG <= 35 lb/d Jan, Feb, Nov, Dec
001Nitrogen, ammonia total [as N]WKLY AVG <= 26 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]WKLY AVG <= 53 lb/d Jan, Feb, Nov, Dec
001Di[2-ethylhexyl] phthalate [DEHP]MO AVG <= .0037 mg/L all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .0054 mg/L all year
001Di[2-ethylhexyl] phthalate [DEHP]MO AVG <= .029 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .043 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 <= .09 lb/d all year
001Chlorine, total residualDAILY MX <= .15 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
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