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TC Energy - Northern Border Pipeline Company

Natural Gas Transmission, Poplar, Montana. NPDES permit MT0030791, in force until Sep 30, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form M twice a year
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 2 reports late

Limits in force (38)

ParameterStatisticLimitMonths
pHminimum≥ 6.5 SUall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 9 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended30-day average≤ 30 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspended7-day average≤ 45 mg/Lall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximum≤ 80 mg/Lall year
Solids, total suspendeddaily maximum≤ 80 mg/Lall year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspended30-day averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspended7-day averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Oil & Greasedaily maximum≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 10 mg/Lall year
Benzenedaily maximumreport only (ug/L)all year
Benzenedaily maximumreport only (ug/L)all year
Polychlorinated biphenyls [PCBs]daily maximumreport only (ug/L)all year
Polychlorinated biphenyls [PCBs]daily maximumreport only (ug/L)all year
Chlorine, total residual30-day average≤ .011 mg/Lall year
Chlorine, total residual30-day average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
Solids, total suspendedvalue≤ 0 %all year
Solids, total suspendedvalue≤ 0 %all year
Flow, totaldaily maximumreport only (MGD)all year
Flow, totaldaily maximumreport only (MGD)all year
Oil and grease visualinstantaneous maximumreport only (N=0;Y=1)all year
Oil and grease visualinstantaneous maximumreport only (N=0;Y=1)all year

How strict are these limits?

Cited limits by parameter: Montana'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/MT0030791 · MCP: https://passage-data.com/mcp