Non-Compliance
TRI Reporter
Clean Air Act
Clean Water Act
RCRA
MONTANA SULPHUR & CHEMICAL CO
Quick Summary
- •Released 15,864 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Currently out of compliance in at least one environmental program (CAA, CWA, or RCRA).
- •Assessed $0 in total penalties since records began.
- Address
-
627 EXXON REFINERY RD
BILLINGS, MT 59101
View on map ↗ - County
- YELLOWSTONE County
- Industry
- Manufacturing
- NAICS (North American Industry Classification)
- 325180
- Inspections
- 7 · last Sep 23, 2025
- Total Penalties
- $0 · last Oct 29, 1999
- Registry ID
- 110000428476
How This Compares
#23
of 55 TRI reporters in MT
#3,201
of 16,877 TRI reporters in Manufacturing
Ranked by most recent year's total TRI releases.
Compliance Status (Last 12 Quarters)
Number of calendar quarters, out of the last 12, in which this facility was in violation of its permit. Zero means no recorded violations in that program over the past three years.
0
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
10
Water (CWA)
Qtrs Non-Compliant
Qtrs Non-Compliant
1
Hazardous Waste (RCRA)
Qtrs Non-Compliant
Qtrs Non-Compliant
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2024)
+12% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 15,813 | — |
| 2016 | 13,680 | -13% |
| 2017 | 15,864 | +16% |
| 2018 | 16,264 | +3% |
| 2020 | 14,462 | — |
| 2021 | 15,618 | +8% |
| 2022 | 14,350 | -8% |
| 2023 | 17,559 | +22% |
| 2024 | 17,741 | +1% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 15,548 | 15,548 | — | — | — | |
| Carbon disulfide | 1,167 | 1,167 | — | — | — | |
| Carbonyl sulfide | 1,026 | 1,026 | — | — | — |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 15,248 | 15,248 | — | — | — | |
| Carbon disulfide | 1,230 | 1,230 | — | — | — | |
| Carbonyl sulfide | 1,081 | 1,081 | — | — | — |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 12,826 | 12,826 | — | — | — | |
| Carbon disulfide | 811 | 811 | — | — | — | |
| Carbonyl sulfide | 713 | 713 | — | — | — |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 13,231 | 13,231 | — | — | — | |
| Carbon disulfide | 1,270 | 1,270 | — | — | — | |
| Carbonyl sulfide | 1,117 | 1,117 | — | — | — |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 12,218 | 12,218 | — | — | — | |
| Carbon disulfide | 1,194 | 1,194 | — | — | — | |
| Carbonyl sulfide | 1,050 | 1,050 | — | — | — |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 13,894 | 13,894 | — | — | — | |
| Carbon disulfide | 1,261 | 1,261 | — | — | — | |
| Carbonyl sulfide | 1,109 | 1,109 | — | — | — |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 13,323 | 13,323 | — | — | — | |
| Carbon disulfide | 1,352 | 1,352 | — | — | — | |
| Carbonyl sulfide | 1,189 | 1,189 | — | — | — |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 11,490 | 11,490 | — | — | — | |
| Carbon disulfide | 1,165 | 1,165 | — | — | — | |
| Carbonyl sulfide | 1,025 | 1,025 | — | — | — |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Hydrogen sulfide | 13,061 | 13,061 | — | — | 5 | |
| Carbon disulfide | 1,464 | 1,464 | — | — | — | |
| Carbonyl sulfide | 1,288 | 1,288 | — | — | — |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| rcra | Standards for Universal Waste Management: Standards for Small Quantity Handlers | May 13, 2025 | May 13, 2025 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 15, 2024 | — | Open |
| cwa | Schedule Event reported late | Jan 15, 2024 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jul 14, 2022 | Jan 27, 2023 | Resolved |
| cwa | Schedule Event reported late | Jul 14, 2022 | — | Open |
| cwa | Schedule Event achieved late but reported | Jul 14, 2022 | — | Open |
| cwa | Schedule Event unachieved but reported | Jul 14, 2022 | Jan 27, 2023 | Resolved |
| cwa | Reporting Violations - Improper/ Incorrect Reporting | Dec 14, 2016 | Feb 7, 2017 | Resolved |
| cwa | Monitoring Violations - Frequency of Sampling Violation | Dec 14, 2016 | Feb 7, 2017 | Resolved |
| rcra | Standards for Universal Waste Management: Standards for Small Quantity Handlers | Apr 13, 2016 | Jun 7, 2016 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Apr 13, 2016 | May 4, 2016 | Resolved |
| cwa | Schedule Event achieved late but reported | Jan 29, 2016 | — | Open |
| cwa | Schedule Event achieved late but reported | Jan 28, 2013 | — | Open |
| cwa | Schedule Event reported late | Jan 28, 2013 | — | Open |
| cwa | Schedule Event unachieved and not reported | Jan 28, 2013 | Mar 5, 2013 | Resolved |
| cwa | Schedule Event unachieved but reported | Jan 28, 2013 | Mar 5, 2013 | Resolved |
| cwa | Management Practice Violations - Failure to Maintain Records | Dec 15, 2011 | Mar 9, 2012 | Resolved |
| rcra | Standards for Used Oil: Generators | Jun 9, 1999 | Jul 14, 1999 | Resolved |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
DOCUMENT RECEIVED
RCRA (Hazardous Waste)
· Case RCRA-MTD006233456-001 · Jun 7, 2016
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-MTD006233456-002 · May 13, 2016
DOCUMENT RECEIVED
RCRA (Hazardous Waste)
· Case RCRA-MTD006233456-000 · Jun 22, 1999
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