Omya Inc: 4 open mines, 107 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Omya Inc (MSHA operator ID 0097485) operates 4 open mines with 164 employees in California, Alabama, Arizona, mostly crushed, broken marble. Since January 1, 2022 MSHA inspectors issued it 107 citations and orders with $44,748 in proposed penalties, and it reported 34 injury or illness cases. Data from MSHA, November 6, 2026.
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- MSHA operator ID
- 0097485
- Open mines
- 4
- Employees at open mines
- 164
- States
- California, Alabama, Arizona
- Parent company
- Omya Industries Inc
- Citations and orders since January 1, 2022
- 107
- Significant and substantial
- 19 (17.8%)
- Closure orders
- 2
- High negligence or reckless
- 7
- Proposed penalties
- $44,748
- Amount paid so far
- $30,862
- Inspections
- 58
- Inspector hours on site
- 820
- Citations per inspection
- 1.84 (all mines 2.30)
- Accident reports
- 34
- Injury and illness cases
- 34
- Fatalities
- 0
- Latest MSHA record
- October 22, 2026
Open mines of Omya Inc
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Omya California | Omya Inc | San Bernardino County, CA | Crushed, broken limestone | 62 | 46 |
| Omya Alabama Plant | Omya Inc | Talladega County, AL | Crushed, broken marble | 67 | 44 |
| Omya Arizona | Omya Inc | Pinal County, AZ | Crushed, broken marble | 28 | 17 |
| Amboy Limestone Quarry | Omya Inc | San Bernardino County, CA | Crushed, broken limestone | 7 | 0 |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 22 | 6 | $6,981 | 7 |
| 2023 | 20 | 2 | $8,091 | 11 |
| 2024 | 25 | 4 | $17,309 | 7 |
| 2025 | 31 | 5 | $10,559 | 3 |
| 2026 | 9 | 2 | $1,808 | 6 |
Standards cited most at Omya Inc
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 10 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.17001 | Surface metal and nonmetal mines | 4 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 4 |
| 30 CFR 56.11012 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.20011 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 2 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 2 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 2 |
Injury and illness cases at Omya Inc
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 27 |
| No lost time, or an occupational illness | 7 |
What the accident reports at Omya Inc describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 12 |
| Slip or fall of person | 10 |
| Powered haulage | 4 |
| Other | 2 |
| Occupational skin diseases | 1 |
| Disorders (physical agents) | 1 |
| Striking or bumping | 1 |
| Machinery | 1 |
| Electrical | 1 |
| Handtools (nonpowered) | 1 |
Equipment named in accident reports at Omya Inc
| Equipment | Reports |
|---|---|
| Forklift | 3 |
| Ore haulage trucks - off highway trucks | 1 |
| Hand tools (powered) | 1 |
| Front-end loader | 1 |
| Trucks | 1 |
| Hand tools (not powered) | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Crushed, broken marble | 2 |
| Crushed, broken limestone | 2 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.