As one of the organizations that has participated in all 16 years of the St. Louis Green Business Challenge, Bayer continues to demonstrate that sustainability is most effective when it is embedded into everyday operations. That ongoing commitment earned the company Champion Level recognition in the 2025 Challenge, highlighting the meaningful environmental impact taking place at its Chesterfield and Creve Coeur campuses.
As a global life sciences company focused on health and nutrition, Bayer recognizes the connection between environmental stewardship and the health of communities. Its local sustainability efforts reflect that philosophy, helping employees, visitors and the broader St. Louis region benefit from cleaner, healthier spaces while supporting initiatives that can contribute to improved air quality, reduced waste and responsible resource use.
Bayer’s 2025 Green Business Challenge accomplishments showcase a comprehensive approach to sustainability. The company maintained an overall landfill diversion rate of more than 60%, helping keep valuable materials out of landfills and reducing waste across its operations. Bayer also expanded support for cleaner transportation by installing six additional Level 2 electric vehicle (EV) charging stations at its Chesterfield campus parking garage, bringing the site’s total charging capacity to 27 EVs at one time.
The company’s commitment to biodiversity and habitat conservation also continued to earn national recognition. Both the Creve Coeur and Chesterfield campuses received Gold certification from the Wildlife Habitat Council, reflecting Bayer’s efforts to create and maintain spaces where native plants and wildlife can thrive. Employees also actively participated in the Blue Bird Nestbox monitoring program, which experienced another successful year of engagement and habitat stewardship.
Beyond operational improvements, Bayer places a strong emphasis on employee involvement and community engagement. During the 2025 Challenge year, the company hosted Earth Day events at both St. Louis-area campuses, providing opportunities for employees to learn about sustainable practices and environmental responsibility.
Bayer’s Sustainability Team also partnered with Open Space STL to support the 2025 Operation Clean Stream event at George Winter Park in Fenton. The annual volunteer effort helps remove litter and debris from local waterways and surrounding areas, improving the health of regional ecosystems and helping protect water quality.
On campus, Bayer continued to connect employees with nature through activities such as Nature Walks and Biodiversity Blitz events. These programs encourage participants to explore local ecosystems, learn about native species and better understand the important role biodiversity plays in maintaining healthy environments.
“Sustainability is more than just a goal at Bayer, it’s part of our everyday work,” said Mark Wieners, Associate Manager of Environmental Facility & Lab Operations for Bayer. “We provide habitats on our campuses for native species to thrive, while reducing waste and conserving energy and water to protect the resources we all depend on.”
For more information about Bayer or to get involved in the St. Louis Green Business Challenge, subscribe to the bi-monthly E-Newsletter or visit stlouisgreenchallenge.com. For more on how sustainability connects to air quality, visit the Clean Air Partnership’s website, like us on Facebook or follow us on X @gatewaycleanair.
