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City of Hickory

Sewage treatment plant, major discharger, Catawba, North Carolina. NPDES permit NC0025542 expired Apr 30, 2026; its limits still apply. Last 12 months: no values over a limit, 10 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M monthly (28 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 6 required values missing, 1 of 12 reports late

Limits in force (39)

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 (mg/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 (mg/L)Jun–Sep
BOD, 5-day, 20 deg. C7-day average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. C30-day average≤ 10 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, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, total [as N]daily maximumreport only (mg/L)Jun–Sep
Nitrogen, total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, total [as N]daily maximumreport only (mg/L)Jun–Sep
Nitrogen, ammonia total [as N]7-day average≤ 6 mg/Lall year
Nitrogen, ammonia total [as N]30-day average≤ 2 mg/Lall year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–Sep
Phosphorus, total [as P]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Phosphorus, total [as P]daily maximumreport only (mg/L)Jun–Sep
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
Chlorophyll Adaily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Chlorophyll Adaily maximumreport only (mg/L)Jun–Sep
Chlorophyll Adaily maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Chlorophyll Adaily maximumreport only (mg/L)Jun–Sep
Methyl bromide [Bromomethane]daily maximumreport only (ug/L)all 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/NC0025542 · MCP: https://passage-data.com/mcp