Facility profile
Hemlock Semiconductor Operations Llc
Significant noncompliance across 5 of the last 12 quarters in the imported ECHO record.
Noncompliance quarters
5
Counted from the imported ECHO record over the last 12 quarters.
Penalties
$0
Recorded enforcement amount carried into the facility page.
Last inspection
2025-08-12
Displayed as plain language instead of hidden in agency exports.
Trend
Watch
Reported on-site releases are lower in 2024 than in 2022.
| Year | Air | Water | Land | Total |
|---|---|---|---|---|
| 2022 | 28,558 lbs | 0 lbs | 0 lbs | 28,558 lbs |
| 2023 | 1,253 lbs | 0 lbs | 0 lbs | 1,253 lbs |
| 2024 | 4,966 lbs | 0 lbs | 0 lbs | 4,966 lbs |
Chemical breakdown
What this facility is reporting
-
Hydrochloric 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.
-
Hydrogen fluoride
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
-
Nitric acid
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
-
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
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
Significant noncompliance across 5 of the last 12 quarters in the imported ECHO record.