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Town of Rich Square

Sewage treatment plant, Rich Square, North Carolina. NPDES permit NC0025437, in force until Mar 31, 2027. Last 12 months: over a limit 11 times (last August 2026), 7 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form M monthly (20 values)
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
24 values over a limit, 19 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
January 2026Nitrogen, ammonia total [as N], 30-day average4.555 mg/L≤ 4 mg/L14%
February 2026Nitrogen, ammonia total [as N], 30-day average9.305 mg/L≤ 4 mg/L133%
March 2026Nitrogen, ammonia total [as N], 30-day average9.695 mg/L≤ 4 mg/L142%
April 2026BOD, 5-day, 20 deg. C, 30-day average51.5 mg/L≤ 30 mg/L72%
April 2026BOD, 5-day, 20 deg. C, 7-day average75 mg/L≤ 45 mg/L67%
May 2026BOD, 5-day, 20 deg. C, 30-day average41.5 mg/L≤ 30 mg/L38%
May 2026BOD, 5-day, 20 deg. C, 7-day average49 mg/L≤ 45 mg/L9%
May 2026Coliform, fecal MF, MFC broth, 44.5 C, monthly geometric mean836.66 #/100mL≤ 200 #/100mL318%
May 2026Coliform, fecal MF, MFC broth, 44.5 C, weekly geometric mean1400 #/100mL≤ 400 #/100mL250%
July 2026Flow, in conduit or thru treatment plant, 30-day average.1633 MGD≤ .15 MGD9%
August 2026Coliform, fecal MF, MFC broth, 44.5 C, weekly geometric mean540 #/100mL≤ 400 #/100mL35%

Limits in force (23)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/LApr–Oct
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/LApr–Oct
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)Jan, 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≤ 135 mg/Lall year
Solids, total suspended30-day average≤ 90 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≤ .15 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.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0025437 · MCP: https://passage-data.com/mcp