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

City of Winston-Salem

Sewage treatment plant, major discharger, Winston Salem, North Carolina. NPDES permit NC0037834, in force until Mar 31, 2029. Last 12 months: over a limit 2 times (last January 2026). 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, 18 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 average2.9216 mg/L≤ 2.4 mg/L22%
January 2026Nitrogen, ammonia total [as N], 7-day average8.0483 mg/L≤ 7.2 mg/L12%

Limits in force (26)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Conductivitydaily maximumreport only (umho/cm)all year
Oxygen, dissolved [DO]daily minimum≥ 6.5 mg/Lall year
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. C7-day average≤ 31.5 mg/LApr–Oct
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. C30-day average≤ 21 mg/LApr–Oct
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, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]7-day average≤ 7.2 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 3.6 mg/LApr–Oct
Nitrogen, ammonia total [as N]30-day average≤ 2.4 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ 1.2 mg/LApr–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all year
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all 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≤ 30 MGDall year
Chlorine, total residualdaily maximum≤ 22.5 ug/Lall year
1,4-Dioxanedaily maximumreport only (ug/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/NC0037834 · MCP: https://passage-data.com/mcp