Town of Columbia

NPDES permit NC0007510 · Minor NON-POTW · effective, expires 2031-06-30 · 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

6values over a limit
4required values missing, on 1 form(s)
2of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Zinc, total [as Zn] (6).

Reporting

Reports are due about 31 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (22)

OutfallParameterStatisticLimitMonths
001TurbidityDAILY MX report only all year
001ConductivityDAILY MX report only all year
001ConductivityDAILY MX report only all year
001ConductivityDAILY MX report only all year
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001pHDAILY MX report only all year
001pHDAILY MX report only all year
001SalinityDAILY MX report only all year
001SalinityDAILY MX report only all year
001SalinityDAILY MX report only all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Chloride [as Cl]DAILY MX report only all year
001Copper, total [as Cu]30DA AVG <= 7.88 ug/L all year
001Copper, total [as Cu]DAILY MX <= 10.47 ug/L all year
001Manganese, total [as Mn]DAILY MX report only all year
001Zinc, total [as Zn]30DA AVG <= 126.7 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 125.7 ug/L all year
001Chlorine, total residualDAILY MX <= 17 ug/L all year
001Solids, total dissolvedDAILY 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