NORTH MYRTLE BEACH CITY OF

NPDES permit SC0022161 · Major POTW · effective, expires 2026-10-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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 (41)

OutfallParameterStatisticLimitMonths
001Oxygen demand, ultimateMO AVG <= 330 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 <= 726 lb/d all year
001Solids, total suspendedWKLY AVG <= 1089 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 <= 6 mg/L all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 9 mg/L all year
001Nitrogen, ammonia total [as N]MO AVG <= 145 lb/d all year
001Nitrogen, ammonia total [as N]WKLY AVG <= 218 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
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 <= .234 mg/L all year
001Chlorine, total residualDAILY MX <= .404 mg/L all year
001Chlorine, total residualMO AVG <= 5.66 lb/d all year
001Chlorine, total residualDAILY MX <= 9.77 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, carbonaceous [5 day, 20 C]MO AVG <= 8.3 mg/L all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 12.4 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 201 lb/d all year
001BOD, carbonaceous [5 day, 20 C]WKLY AVG <= 302 lb/d 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