Facility profile
Markwest Hydrocarbon Llc - Siloam Fractionation Facility
No Violation Identified. Last recorded ECHO inspection: 2025-07-15.
Noncompliance quarters
0
Counted from the imported ECHO record over the last 12 quarters.
Penalties
$0
Recorded enforcement amount carried into the facility page.
Last inspection
2025-07-15
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 | 1,329 lbs | 0 lbs | 0 lbs | 1,329 lbs |
| 2023 | 4,699 lbs | 0 lbs | 0 lbs | 4,699 lbs |
| 2024 | 4,774 lbs | 0 lbs | 0 lbs | 4,774 lbs |
Chemical breakdown
What this facility is reporting
-
n-Hexane
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
-
Benzene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
-
Cyclohexane
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
No Violation Identified. Last recorded ECHO inspection: 2025-07-15.