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Town of Columbia

Water Supply, Columbia, North Carolina. NPDES permit NC0007510, in force until Jun 30, 2031. Last 12 months: over a limit 8 times (last August 2026), 4 required values missing, 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form M monthly (22 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 5 required values missing, 5 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
February 2026Zinc, total [as Zn], 30-day average293 ug/L≤ 85.6 ug/L242%
February 2026Zinc, total [as Zn], daily maximum293 ug/L≤ 95.1 ug/L208%
April 2026Zinc, total [as Zn], 30-day average110 ug/L≤ 85.6 ug/L29%
April 2026Zinc, total [as Zn], daily maximum110 ug/L≤ 95.1 ug/L16%
May 2026Zinc, total [as Zn], 30-day average112 ug/L≤ 85.6 ug/L31%
May 2026Zinc, total [as Zn], daily maximum112 ug/L≤ 95.1 ug/L18%
August 2026Copper, total [as Cu], 30-day average26.3 ug/L≤ 7.88 ug/L234%
August 2026Copper, total [as Cu], daily maximum26.3 ug/L≤ 10.47 ug/L151%

Limits in force (22)

ParameterStatisticLimitMonths
Turbiditydaily maximumreport only (NTU)all year
Conductivitydaily maximumreport only (umho/cm)all year
Conductivitydaily maximumreport only (umho/cm)all year
Conductivitydaily maximumreport only (umho/cm)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pHdaily maximumreport only (SU)all year
pHdaily maximumreport only (SU)all year
Salinitydaily maximumreport only (ppt)all year
Salinitydaily maximumreport only (ppt)all year
Salinitydaily maximumreport only (ppt)all year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (ug/L)all year
Copper, total [as Cu]30-day average≤ 7.88 ug/Lall year
Copper, total [as Cu]daily maximum≤ 10.47 ug/Lall year
Manganese, total [as Mn]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]30-day average≤ 126.7 ug/Lall year
Zinc, total [as Zn]daily maximum≤ 125.7 ug/Lall year
Chlorine, total residualdaily maximum≤ 17 ug/Lall year
Solids, total dissolveddaily maximumreport only (mg/L)all year

How strict are these limits?

Cited limits by parameter: North Carolina's rules and the federal ones.

Same industry: the 130 Water Supply permits in North Carolina.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0007510 · MCP: https://passage-data.com/mcp