Grand Strand Water & Sewer Authority

NPDES permit SC0049362 · Minor POTW · effective, expires 2028-03-31 · 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

0values over a limit
0required values missing, on 0 form(s)
0of 16 forms filed late

Last period with anything received: 2026-07-31.

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 (65)

OutfallParameterStatisticLimitMonths
001Oxygen demand, ultimateMO AVG report only all year
001Oxygen demand, ultimateWKLY AVG report only all year
001Oxygen demand, ultimateMO AVG report only all year
001Oxygen demand, ultimateWKLY AVG report only all year
001Oxygen demand, ultimateMO AVG = 303 lb/d all year
001Oxygen demand, ultimateWKLY AVG report only all year
001Oxygen, dissolved [DO]MINIMUM = 6 mg/L 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 = 1000 lb/d all year
001Solids, total suspendedWKLY AVG = 1500 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 report only all year
001Nitrogen, ammonia total [as N]WKLY AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]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
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 = .03 mg/L all year
001Cadmium, total [as Cd]DAILY MX = .059 mg/L all year
001Cadmium, total [as Cd]MO AVG = 1 lb/d all year
001Cadmium, total [as Cd]DAILY MX = 1.97 lb/d all year
001Copper, total [as Cu]MO AVG = .16 mg/L all year
001Copper, total [as Cu]DAILY MX = .21 mg/L all year
001Copper, total [as Cu]MO AVG = 5.34 lb/d all year
001Copper, total [as Cu]DAILY MX = 7 lb/d all year
001Lead, total [as Pb]MO AVG = .059 mg/L all year
001Lead, total [as Pb]DAILY MX report only all year
001Lead, total [as Pb]MO AVG = 1.97 lb/d all year
001Lead, total [as Pb]DAILY MX report only all year
001Zinc, total [as Zn]MO AVG = 2.4 mg/L all year
001Zinc, total [as Zn]DAILY MX = 2.4 mg/L all year
001Zinc, total [as Zn]MO AVG = 80 lb/d all year
001Zinc, total [as Zn]DAILY MX = 80 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 = .29 mg/L all year
001Chlorine, total residualDAILY MX = .49 mg/L all year
001Chlorine, total residualMO AVG = 9.67 lb/d all year
001Chlorine, total residualDAILY MX = 16.35 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
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, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG report only all year
001Solids, suspended percent removalMO AV MN = 85 % all year
001Carbonaceous oxygen demand, % 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