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

Year-over-year total releases

Reported on-site TRI releases in pounds, grouped by reporting year.

The 10 chemicals with the highest cumulative on-site releases across all available years.

Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.

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
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