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Town of Lake Waccamaw

Sewage treatment plant, Lake Waccamaw, North Carolina. NPDES permit NC0021881 expired Jul 31, 2024; its limits still apply. Last 12 months: over a limit 7 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: form M monthly (16 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
37 values over a limit, 14 required values missing, 3 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, 7-day average23 mg/L≤ 15 mg/L53%
October 2025Nitrogen, ammonia total [as N], 30-day average3.18 mg/L≤ 2 mg/L59%
October 2025Nitrogen, ammonia total [as N], 7-day average8.8 mg/L≤ 6 mg/L47%
December 2025Coliform, fecal MF, MFC broth, 44.5 C, weekly geometric mean1447.6164 #/100mL≤ 400 #/100mL262%
July 2026Nitrogen, ammonia total [as N], 30-day average14.44 mg/L≤ 2 mg/L622%
July 2026Nitrogen, ammonia total [as N], 7-day average66 mg/L≤ 6 mg/L1000%
July 2026Oxygen, dissolved [DO], daily minimum2.2 mg/L≥ 5 mg/L56%

Limits in force (20)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 15 mg/LApr–Oct
BOD, 5-day, 20 deg. C7-day average≤ 16.5 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. C30-day average≤ 10 mg/LApr–Oct
BOD, 5-day, 20 deg. C30-day average≤ 11 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]7-day average≤ 6 mg/LApr–Oct
Nitrogen, ammonia total [as N]7-day average≤ 12 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/LApr–Oct
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LJan, Feb, Mar, Nov, Dec
Coliform, fecal MF, MFC broth, 44.5 Cweekly geometric mean≤ 400 #/100mLall year
Coliform, fecal MF, MFC broth, 44.5 Cmonthly geometric mean≤ 200 #/100mLall year
Flow, in conduit or thru treatment plant30-day average≤ .4 MGDall year
Chlorine, total residualdaily maximum≤ 17 ug/Lall year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0021881 · MCP: https://passage-data.com/mcp