Several of Westlake's operations which produce petrochemicals and plastics have earned the prestigious ISO 9001:2008 certification or the new ISO 9001:2015 certification. ISO certification signifies that a company has an ongoing program of continual quality improvement. Either ISO 9001:2008 or ISO 9001:2015 certification indicates that Westlake's production facilities meet rigid standards and supplier requirements and are committed to continual improvement.
Westlake Chemical Corporation operations with ISO 9001:2008 or ISO 9001:2015 certification include the following:
(Click on location below to view certificate)