Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
LONE STAR IND. INC. DBA BUZZI UNICEM USA PRYOR CEMENT PLANT
2430 S COUNTY RD 437, PRYOR, OK, 74361
Parent company: RC LONESTAR INC
Carcinogen
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Chromium compounds (except for chromite ore mined in the Transvaal Region) | Acetaldehyde | Zinc compounds | Formaldehyde | Total (lbs) |
| 2024 | — | — | — | — | — | 109 |
| 2023 | — | — | — | — | — | 115 |
| 2022 | — | — | 25,936 | 5,861 | 28,782 | 61,605 |
| 2021 | — | — | 25,677 | 6,104 | — | 36,775 |
| 2020 | — | — | — | 5,613 | — | 11,882 |
| 2019 | — | — | — | 3,890 | — | 8,196 |
| 2018 | — | — | — | 5,328 | — | 9,992 |
| 2017 | — | — | — | 2,085 | — | 3,638 |
| 2016 | — | — | — | 1,255 | — | 1,952 |
| 2015 | — | — | — | 711 | — | 1,144 |
| 2014 | — | — | — | 3,318 | — | 5,023 |
| 2013 | — | — | — | 2,941 | — | 7,327 |
| 2012 | 33,056 | — | — | 5,603 | — | 39,036 |
| 2011 | — | — | — | 1,018 | — | 1,096 |
| 2010 | — | — | — | 7,038 | — | 7,354 |
| 2009 | — | — | — | 328 | — | 416 |
| 2008 | — | 86 | — | — | — | 408 |
| 2007 | — | 37 | — | — | — | 155 |
| 2006 | — | 51 | — | — | — | 70 |
| 2005 | — | 459 | — | — | — | 480 |
| 2004 | — | 2,815 | — | — | — | 3,320 |
| 2003 | — | 2,269 | — | — | — | 2,655 |
| 2002 | — | 8,172 | — | — | — | 8,652 |
| 2001 | — | 1,048 | — | — | — | 1,703 |
| 2000 | — | 3,740 | — | — | — | 3,977 |
| 1999 | — | 11,350 | — | — | — | 11,350 |
| 1998 | 27,900 | 12,750 | — | — | — | 40,650 |
| 1997 | 27,700 | 13,050 | — | — | — | 40,750 |
| 1996 | 28,500 | 12,450 | — | — | — | 40,950 |
| 1995 | 27,000 | 250 | — | — | — | 27,250 |
| 1994 | — | 1,000 | — | — | — | 1,000 |
| 1993 | — | 1,000 | — | — | — | 1,000 |
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.