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Town of Tryon

Sewage treatment plant, major discharger, Tryon, North Carolina. NPDES permit NC0021601, in force until Dec 31, 2029. Last 12 months: over a limit 7 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 31 days after each period: form M monthly (24 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
5 values over a limit, 6 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Copper, total [as Cu], 30-day average36 ug/L≤ 21.4 ug/L68%
October 2025Copper, total [as Cu], daily maximum36 ug/L≤ 25.5 ug/L41%
October 2025Nitrogen, ammonia total [as N], 30-day average9.1785 mg/L≤ 2.3 mg/L299%
October 2025Nitrogen, ammonia total [as N], 7-day average11.3333 mg/L≤ 6.9 mg/L64%
November 2025Coliform, fecal MF, MFC broth, 44.5 C, weekly geometric mean1039.4869 #/100mL≤ 400 #/100mL160%
December 2025Coliform, fecal MF, MFC broth, 44.5 C, weekly geometric mean600 #/100mL≤ 400 #/100mL50%
August 2026Copper, total [as Cu], 30-day average25 ug/L≤ 21.4 ug/L17%

Limits in force (32)

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)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Temperature, water deg. centigradedaily maximumreport only (deg C)Jun–Sep
Conductivitydaily maximumreport only (umho/cm)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Conductivitydaily maximumreport only (umho/cm)Jun–Sep
Conductivitydaily maximumreport only (umho/cm)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Conductivitydaily maximumreport only (umho/cm)Jun–Sep
Oxygen, dissolved [DO]daily minimum≥ 5 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 (mg/L)Jun–Sep
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jun–Sep
Oxygen, dissolved [DO]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. C7-day average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year
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≤ 6.9 mg/LApr–Oct
Nitrogen, ammonia total [as N]7-day average≤ 15.6 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LApr–Oct
Nitrogen, ammonia total [as N]30-day average≤ 5.2 mg/LJan, Feb, Mar, Nov, Dec
Copper, total [as Cu]30-day average≤ 21.4 ug/Lall year
Copper, total [as Cu]daily maximum≤ 25.5 ug/Lall 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≤ 1.5 MGDall year
Chlorine, total residualdaily maximum≤ 28 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/NC0021601 · MCP: https://passage-data.com/mcp