Non-Compliance
TRI Reporter
Clean Air Act
RCRA
LONE STAR IND INC DBA BUZZI UNICEM USA PRYOR CEMENT PLANT
Quick Summary
- •Released 3,638 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 $6,426 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
2430 S COUNTY RD 437
PRYOR, OK 74361
View on map ↗ - County
- MAYES County
- Industry
- Manufacturing
- NAICS (North American Industry Classification)
- 327310
- Inspections
- 3 · last May 28, 2025
- Total Penalties
- $6,426 · last Feb 20, 2026
- Registry ID
- 110000598504
How This Compares
#134
of 314 TRI reporters in OK
#5,457
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.
7
Air (CAA)
Qtrs Non-Compliant
Qtrs Non-Compliant
0
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)
-90% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 1,144 | — |
| 2016 | 1,952 | +71% |
| 2017 | 3,638 | +86% |
| 2018 | 9,992 | +175% |
| 2020 | 11,882 | — |
| 2021 | 36,775 | +210% |
| 2022 | 61,606 | +68% |
| 2023 | 115 | -100% |
| 2024 | 109 | -5% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 60 | 53 | — | 7 | 7,485 | |
| Lead compounds | 30 | 28 | — | 2 | — | |
| Lithium carbonate | 11 | 11 | — | — | — | |
| Mercury compounds | 9 | 7 | — | 1 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 63 | 57 | — | 6 | 8,627 | |
| Lead compounds | 31 | 29 | — | 2 | — | |
| Mercury compounds | 12 | 12 | — | — | — | |
| Lithium carbonate | 10 | 10 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Ethylene glycol | — | — | — | — | — | |
| Formaldehyde | 28,782 | 28,782 | — | — | — | ♦ Carcinogen |
| Acetaldehyde | 25,936 | 25,936 | — | — | — | ♦ Carcinogen |
| Zinc compounds | 5,861 | 150 | — | 5,711 | 1,805 | |
| Aluminum oxide (fibrous forms) | 872 | 872 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 83 | 75 | — | 8 | 3,518 | |
| Lead compounds | 43 | 39 | — | 4 | — | |
| Mercury compounds | 17 | 17 | — | 1 | — | |
| Lithium carbonate | 11 | 11 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Acetaldehyde | 25,677 | 25,677 | — | — | — | ♦ Carcinogen |
| Zinc compounds | 6,104 | 156 | — | 5,948 | 1,085 | |
| Lead compounds | 2,607 | 39 | — | 2,568 | — | |
| Aluminum oxide (fibrous forms) | 1,440 | 1,440 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 923 | 72 | — | 851 | 1,492 | |
| Lithium carbonate | 12 | 12 | — | — | — | |
| Mercury compounds | 12 | 11 | — | 1 | — |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | 5,613 | 160 | — | 5,453 | 1,564 | |
| Aluminum oxide (fibrous forms) | 3,007 | 3,007 | — | — | — | |
| Lead compounds | 2,388 | 34 | — | 2,354 | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 851 | 71 | — | 780 | 2,226 | |
| Lithium carbonate | 13 | 13 | — | — | — | |
| Mercury compounds | 10 | 10 | — | 1 | — |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | 5,328 | 37 | — | 5,292 | 770 | |
| Lead compounds | 2,010 | 33 | — | 1,977 | — | |
| Aluminum oxide (fibrous forms) | 1,622 | 1,622 | — | — | — | |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 1,013 | 125 | — | 888 | 1,564 | |
| Mercury compounds | 11 | 11 | — | 1 | — | |
| Lithium carbonate | 8 | 8 | — | — | — |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | 2,085 | 35 | — | 2,050 | 5,441 | |
| Lead compounds | 798 | 32 | — | 766 | — | |
| Chromium | 466 | 122 | — | 344 | 2,473 | |
| Aluminum oxide (fibrous forms) | 259 | 259 | — | — | — | |
| Lithium carbonate | 15 | 15 | — | — | — | |
| Mercury compounds | 7 | 7 | — | 0 | — | |
| Ethylene glycol | 7 | 7 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | 1,255 | 49 | — | 1,206 | 4,587 | |
| Lead compounds | 492 | 41 | — | 451 | — | |
| Chromium | 178 | 40 | — | 139 | 17,082 | |
| Lithium carbonate | 15 | 15 | — | — | — | |
| Mercury compounds | 13 | 13 | — | 0 | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Zinc compounds | 711 | 43 | — | 668 | 1,109 | |
| Lead compounds | 291 | 41 | — | 250 | — | |
| Chromium | 116 | 39 | — | 77 | 26,942 | |
| Mercury compounds | 16 | 16 | — | 0 | — | |
| Lithium carbonate | 10 | 10 | — | — | — | |
| Dioxin and dioxin-like compounds | 0 | 0 | — | — | — | ♦ Carcinogen |
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 |
|---|---|---|---|---|
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | — | 7,485 | — | — |
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
YAFFE IRON AND METAL CO., INC.
MUSKOGEE, OK
|
Chromium compounds (except for chromite ore mined in the Transvaal Region) | — | 7,485 | — | — |
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 |
|---|---|---|---|---|
| caa | HPV | Sep 26, 2024 | Apr 6, 2026 | Resolved |
| caa | FRV | Sep 27, 2022 | — | Open |
| caa | FRV | Sep 26, 2018 | — | Open |
| rcra | Standards Applicable to Generators of HW: General | May 1, 1991 | May 29, 1991 | 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.
Administrative - Formal
Clean Air Act
· Case 3604831152 · Feb 20, 2026
$6,426
Notice of Violation
Clean Air Act
· Case 3604334281 · Mar 11, 2025
Administrative - Formal
· Case 06-2011-3314 · Apr 28, 2011
VERBAL INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-OKD981151905-000 · May 29, 1991
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