NPDES permit SC0024490 · Major POTW · effective, expires 2027-05-31 · EPA's file as of 2026-09-19
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Last period with anything received: 2026-07-31.
Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | Oxygen demand, ultimate | MO AVG | <= 1125 lb/d | all year |
| 001 | Oxygen demand, ultimate | WKLY AVG | <= 1688 lb/d | all year |
| 001 | Oxygen, dissolved [DO] | MINIMUM | >= 5 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MO AVG | <= 18.8 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | WKLY AVG | <= 28.2 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MO AVG | <= 505 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | WKLY AVG | <= 758 lb/d | all year |
| 001 | pH | MINIMUM | >= 6 SU | all year |
| 001 | pH | MAXIMUM | <= 8.5 SU | all year |
| 001 | Solids, total suspended | MO AVG | <= 30 mg/L | all year |
| 001 | Solids, total suspended | WKLY AVG | <= 45 mg/L | all year |
| 001 | Solids, total suspended | MO AVG | <= 1251 lb/d | all year |
| 001 | Solids, total suspended | WKLY AVG | <= 1877 lb/d | all year |
| 001 | Nitrogen, total [as N] | MO AVG | report only | all year |
| 001 | Nitrogen, total [as N] | WKLY AVG | report only | all year |
| 001 | Nitrogen, total [as N] | MO AVG | report only | all year |
| 001 | Nitrogen, total [as N] | WKLY AVG | report only | all year |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 3.43 mg/L | Jan, Feb, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 3 mg/L | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | WKLY AVG | <= 5.15 mg/L | Jan, Feb, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | WKLY AVG | <= 4.5 mg/L | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 92 lb/d | Jan, Feb, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | MO AVG | <= 81 lb/d | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | Nitrogen, ammonia total [as N] | WKLY AVG | <= 138 lb/d | Jan, Feb, Nov, Dec |
| 001 | Nitrogen, ammonia total [as N] | WKLY AVG | <= 122 lb/d | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | Phosphorus, total [as P] | MO AVG | <= 2 mg/L | all year |
| 001 | Phosphorus, total [as P] | WKLY AVG | report only | all year |
| 001 | Phosphorus, total [as P] | MO AVG | report only | all year |
| 001 | Phosphorus, total [as P] | WKLY AVG | report only | all year |
| 001 | Phosphorus, total [as P] | MO GEO | <= 9800 lb/yr | all year |
| 001 | Copper, total [as Cu] | MO AVG | <= .013 mg/L | all year |
| 001 | Copper, total [as Cu] | DAILY MX | <= .017 mg/L | all year |
| 001 | Copper, total [as Cu] | MO AVG | <= .54 lb/d | all year |
| 001 | Copper, total [as Cu] | DAILY MX | <= .71 lb/d | all year |
| 001 | Zinc, total [as Zn] | MO AVG | <= .21 mg/L | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | <= .21 mg/L | all year |
| 001 | Zinc, total [as Zn] | MO AVG | <= 8.76 lb/d | all year |
| 001 | Zinc, total [as Zn] | DAILY MX | <= 8.76 lb/d | all year |
| 001 | Flow, in conduit or thru treatment plant | MO AVG | report only | all year |
| 001 | Flow, in conduit or thru treatment plant | WKLY AVG | report only | all year |
| 001 | Chlorine, total residual | MO AVG | <= .016 mg/L | all year |
| 001 | Chlorine, total residual | DAILY MX | <= .028 mg/L | all year |
| 001 | Chlorine, total residual | MO AVG | <= .67 lb/d | all year |
| 001 | Chlorine, total residual | DAILY MX | <= 1.17 lb/d | all year |
| 001 | E. coli | MO AVG | <= 126 MPN/100mL | all year |
| 001 | E. coli | DAILY MX | <= 349 MPN/100mL | all year |
| 001 | E. coli | MO AVG | <= 126 MPN/100mL | all year |
| 001 | E. coli | DAILY MX | <= 800 MPN/100mL | all year |
| 001 | BOD, 5-day, percent removal | MO AV MN | >= 85 % | all year |
| 001 | Solids, suspended percent removal | MO AV MN | >= 85 % | all year |
| 001 | LC50 Static 48Hr Acute Ceriodaphnia dubia | MINIMUM | report only | all year |
| 001 | %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | MO AVG | <= 25 % | all year |
| 001 | %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | DAILY MX | <= 40 % | all year |
| 001 | IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | MINIMUM | report only | all year |
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