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Montana Dakota Utilities Co

Electric Services, Mandan, North Dakota. NPDES permit ND0000264, in force until Jun 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 quarterly (18 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (18)

ParameterStatisticLimitMonths
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendeddaily minimumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 100 mg/Lall year
Oil & Greasedaily minimumreport only (mg/L)all year
Oil & Greasemonthly average≤ 15 mg/Lall year
Oil & Greasedaily maximum≤ 20 mg/Lall year
Chloride [as Cl]daily minimumreport only (mg/L)all year
Chloride [as Cl]daily averagereport only (mg/L)all year
Chloride [as Cl]daily maximumreport only (mg/L)all year
Sulfate, total [as SO4]daily minimumreport only (mg/L)all year
Sulfate, total [as SO4]daily averagereport only (mg/L)all year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, totaltotalreport only (Mgal)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.

Same industry: the 6 Electric Services permits in North Dakota.

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/ND0000264 · MCP: https://passage-data.com/mcp