Passage Data · Check a report · Use it from your AI

Union County

Sewage treatment plant, major discharger, Waxhaw, North Carolina. NPDES permit NC0085359 expired Dec 31, 2025; its limits still apply. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (21 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 10 required values missing, 5 of 12 reports late

Limits in force (30)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Temperature, water deg. centigradedaily maximumreport only (deg C)Jun–Sep
Temperature, water deg. centigradedaily maximumreport only (deg C)Jun–Sep
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Oxygen, dissolved [DO]daily maximumreport only (ug/L)Jun–Sep
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Oxygen, dissolved [DO]daily maximumreport only (ug/L)Jun–Sep
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, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]7-day average≤ 3 mg/LApr–Oct
Nitrogen, ammonia total [as N]7-day average≤ 6 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ 1 mg/LApr–Oct
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/LJan, Feb, Mar, Nov, Dec
Phosphorus, total [as P]30-day average≤ 41.7 lb/dall year
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≤ 9 MGDall year
Flow, in conduit or thru treatment plant30-day average≤ 7.5 MGDall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 7.5 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/LJan, Feb, Mar, Nov, Dec
BOD, carbonaceous [5 day, 20 C]30-day average≤ 5 mg/LApr–Oct
BOD, carbonaceous [5 day, 20 C]30-day average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (mg/L)all 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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/NC0085359 · MCP: https://passage-data.com/mcp