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Gwinner City Of

Sewage treatment plant, Gwinner, North Dakota. NPDES permit ND0020010, in force until Sep 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: form A twice a year (16 values), form M yearly (19 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 19 required values missing, 0 of 3 reports late

Limits in force (35)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 25 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedweekly average≤ 30 mg/Lall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Oil & Greasedaily maximum≤ 10 mg/Lall year
Cyanide, total [as CN]daily minimumreport only (mg/L)all year
Cyanide, total [as CN]daily averagereport only (mg/L)all year
Cyanide, total [as CN]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]daily minimumreport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Cadmium, total [as Cd]daily minimumreport only (mg/L)all year
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year
Chromium, total [as Cr]daily minimumreport only (mg/L)all year
Chromium, total [as Cr]daily maximumreport only (mg/L)all year
Copper, total [as Cu]daily minimumreport only (mg/L)all year
Copper, total [as Cu]daily maximumreport only (mg/L)all year
Lead, total [as Pb]daily minimumreport only (mg/L)all year
Lead, total [as Pb]daily maximumreport only (mg/L)all year
Nickel, total [as Ni]daily minimumreport only (mg/L)all year
Nickel, total [as Ni]daily maximumreport only (mg/L)all year
Silver, total [as Ag]daily minimumreport only (mg/L)all year
Silver, total [as Ag]daily maximumreport only (mg/L)all year
Zinc, total [as Zn]daily minimumreport only (mg/L)all year
Zinc, total [as Zn]daily maximumreport only (mg/L)all year
E. colidaily minimumreport only (#/100mL)all year
E. coli30-day geometric mean≤ 126 #/100mLall year
E. colidaily maximum≤ 409 #/100mLall year
E. colimaximum≤ 25 BCFU/dall year
Flow, totaltotalreport only (Mgal)all year
Duration of dischargetotalreport only (d)all year
Oil and grease visualtotalreport only (N=0;Y=1)all year

How strict are these limits?

Cited limits by parameter: North Dakota'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/ND0020010 · MCP: https://passage-data.com/mcp