Lowcountry Regional Water System

NPDES permit SC0042382 · Minor POTW · administratively continued, expires 2019-09-30 · 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 2019-09-30 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 29 forms filed late

Last period with anything received: 2026-08-31. Most often over: BOD, 5-day, 20 deg. C (2), BOD, 5-day, percent removal (1), Solids, suspended percent removal (1).

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 (56)

OutfallParameterStatisticLimitMonths
001StreamflowMINIMUM >= 4.25 cfs Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001StreamflowMINIMUM >= .28 cfs Jan, Feb, Nov, Dec
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. CWKLY AVG <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 9.2 lb/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 13.8 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 <= 27.5 lb/d all year
001Solids, total suspendedWKLY AVG <= 41.3 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 1.5 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= .92 lb/d all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 1.38 lb/d all year
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
001Cadmium, total [as Cd]MO AVG report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Cadmium, total [as Cd]MO AVG report only all year
001Cadmium, total [as Cd]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]DAILY MX report only all year
001Copper, total [as Cu]MO AVG report only all year
001Copper, total [as Cu]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
001Lead, total [as Pb]MO AVG report only all year
001Lead, total [as Pb]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG report only all year
001Zinc, total [as Zn]DAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX 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
001Chlorine, total residualMO AVG <= .286 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualMO AVG <= .029 mg/L Jan, Feb, Nov, Dec
001Chlorine, total residualDAILY MX <= .493 mg/L Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .05 mg/L Jan, Feb, Nov, Dec
001Chlorine, total residualMO AVG <= .26 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualMO AVG <= .03 lb/d Jan, Feb, Nov, Dec
001Chlorine, total residualDAILY MX <= .45 lb/d Mar, Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX <= .05 lb/d Jan, Feb, Nov, Dec
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 report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX 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