Dominion Energy South Carolina, Inc.

NPDES permit SC0002020 · Major NON-POTW · administratively continued, expires 2022-03-31 · 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.

This permit expired on 2022-03-31 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

0values over a limit
0required values missing, on 0 form(s)
0of 34 forms filed late

Last period with anything received: 2026-08-31.

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 (32)

OutfallParameterStatisticLimitMonths
004pHINST MIN >= 6 SU all year
004pHINST MAX <= 8.5 SU all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Solids, total suspendedDAILY MX <= 100 mg/L all year
004Oil & GreaseMO AVG <= 15 mg/L all year
004Oil & GreaseDAILY MX <= 20 mg/L all year
004Floating solids, waste or visible foam-visualDAILY MX <= 0 N=0;Y=1 all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Number of EventsMO AVG report only all year
004Mercury, total [as Hg]MO AVG report only all year
004Mercury, total [as Hg]DAILY MX report only all year
004Duration of dischargeDAILY MX report only all year
004Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
004%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AVG <= 25 % all year
004%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 40 % all year
004Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
006pHINST MIN >= 6 SU all year
006pHINST MAX <= 8.5 SU all year
006Solids, total suspendedMO AVG <= 30 mg/L all year
006Solids, total suspendedDAILY MX <= 100 mg/L all year
006Oil & GreaseMO AVG <= 15 mg/L all year
006Oil & GreaseDAILY MX <= 20 mg/L all year
006Floating solids, waste or visible foam-visualDAILY MX <= 0 N=0;Y=1 all year
006Flow, in conduit or thru treatment plantMO AVG report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
006Mercury, total [as Hg]MO AVG report only all year
006Mercury, total [as Hg]DAILY MX report only all year
006Oil and grease visualDAILY MX <= 0 N=0;Y=1 all year
006%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO AVG <= 25 % all year
006%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 40 % all year
006Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 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