Facility profile
Par Montana, Llc - Billings Refinery
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.
Noncompliance quarters
12
Counted from the imported ECHO record over the last 12 quarters.
Penalties
$0
Recorded enforcement amount carried into the facility page.
Last inspection
2026-02-10
Displayed as plain language instead of hidden in agency exports.
Trend
Watch
Reported on-site releases are higher in 2024 than in 2022.
| Year | Air | Water | Land | Total |
|---|---|---|---|---|
| 2022 | 129,389 lbs | 5,061 lbs | 86 lbs | 134,536 lbs |
| 2023 | 119,909 lbs | 6,227 lbs | 4 lbs | 126,139 lbs |
| 2024 | 139,798 lbs | 4,336 lbs | 12,000 lbs | 156,134 lbs |
Chemical breakdown
What this facility is reporting
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Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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n-Hexane
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Diethanolamine
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Ethylene glycol
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Toluene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Ethylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Xylene (mixed isomers)
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Ammonia
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Hydrogen sulfide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Propylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Benzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Hydrogen fluoride
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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1, 2, 4-Trimethylbenzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Methanol
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Ethylbenzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Zinc compounds
Latest 2024 TRI data shows water as the largest reported pathway for this chemical at the facility.
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Cyclohexane
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Naphthalene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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1, 3-Butadiene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Carbonyl sulfide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Phenol
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Nickel compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Hydrogen cyanide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Molybdenum trioxide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cobalt compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cumene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Phenanthrene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Polycyclic aromatic compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Lead compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Anthracene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Isoprene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Mercury compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Benzo[g, h, i]perylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Dioxin and dioxin-like compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
Enforcement layer
Why the ECHO-style detail matters
Violation Identified across 12 of the last 12 quarters in the imported ECHO record.