In Brazoria County, TX, Chevron Phillips Chemical has its second largest manufacturing facility and includes three sites: Sweeny, Clemens and Old Ocean.
Sweeny
The CPChem facility in Sweeny, Texas, has operated since 1944. Adjacent to the Phillips 66 Refinery, it is one of the world’s largest single-site ethylene facilities, producing more than 11 million pounds of ethylene per day. The site also produces natural gas liquids and propylene.
Old Ocean
Next to the Sweeny facility, Old Ocean houses two world-scale polyethylene units that produce 2.2 billion pounds of plastic resin annually, including high-density and linear low-density polyethylene. It also features the world’s largest on-purpose 1-hexene unit, with a capacity of 586 million pounds per year.
Clemens Terminal
Located 12 miles south of Sweeny, the Clemens Terminal uses a salt dome for brine production and storage operations.
Safety
Safety is at the heart of everything we do. At the Sweeny, Clemens, Old Ocean facilities, protecting our people, our neighbors and the environment is our highest priority. We are committed to operating responsibly and maintaining strong systems, training and a culture of care that supports safe, reliable operations.
Keeping our community safe
- The Sweeny, Clemens & Old Ocean facilities consistently rank in the top 25 percent for safety performance among petrochemical sites in North America.
- Process safety helps prevent incidents that could release materials during manufacturing or chemical operations. Our facilities rank in the top quartile nationwide, reflecting our commitment to safe, reliable operations and environmental protection.
- The Sweeny Emergency Response Team is a shared resource between CPChem and Phillips 66. These trained employees take on emergency duties in addition to their full-time roles. With more than 50 responders across fire, hazmat, medical and rescue teams, supported by advanced equipment and ongoing training, the team plays a vital role in protecting people, operations and the community.
Community Impact
At the Sweeny, Clemens, Old Ocean facilities, being a good neighbor is part of who we are. We support community initiatives and encourage employee volunteerism in areas where we can make a meaningful, lasting impact, such as education and workforce development, health and safety, social enrichment and sustainability.
- Contributions to local non-profits: $365,000
- Volunteer hours: 2,000
- Jobs: 1,000 employees and contractors
CPChem and Phillips 66 jointly host the Sweeny Complex Community Advisory Panel (CAP), a forum that brings together residents, business leaders and company representatives to share updates, discuss community interests and strengthen transparency.
Stay Connected
For questions about plant operations or updates during an emergency, call 979-491-CAER (2237).
Community inquiries: [email protected]
Siren test: Wednesday at noon (Sweeny/Old Ocean), Mondays at 11:45 a.m. in Brazoria.