Clear Texas Lakes (CTL)  is a nonprofit organization dedicated to removing trash and debris from Texas lakes - with special emphasis on Lewisville Lake.  The organization not only helps remove debris from the shoreline along Lake Park but also coordinates volunteer efforts and supports Keep Lewisville Beautiful events such as the Trinity Trash Bash.

(cleartexaslakes.org/)

The City of Lewisville partners with the Elm Fork Chapter of Texas Master Naturalists (EFTMN) to enhance local conservation efforts. This collaboration is formalized through an agreement where EFTMN volunteers support the city’s environmental programs at places such as Lewisville Lake Environmental Learning Area (LLELA) and Thrive Nature Park. The partnership focuses on habitat restoration, educational outreach, and volunteer activities that promote sustainable practices and community engagement, reinforcing Lewisville's commitment to preserving the local ecosystem.

(txmn.org/elmfork/)

The Friends of LLELA is a 501(c)(3) nonprofit organization dedicated to supporting the promotion, interpretation, and operation of the Lewisville Lake Environmental Learning Area (LLELA). As a fundraising and service group, its mission is to enhance LLELA’s overall operation by sponsoring events, funding key projects, and raising community awareness of LLELA as a vital environmental asset.

(friendsofllela.org/)

Keep Lewisville Beautiful (KLB) is a 501(c)(3) nonprofit organization that engages the Lewisville community through service and education to enhance our local environment. The department partners with KLB to manage volunteers at community-wide events, coordinate the Adopt-a-Spot and Giving for Green Spaces programs, and support efforts to maintain public parks and open spaces. 

(keeplewisvillebeautiful.org/)

The Lewisville Park Alliance (LPA) is a 501(c)(3) nonprofit that is dedicated to the promotion, protection, and enhancement of Lewisville's parks and recreation system. LPA plays a vital role in advancing key projects that align with the department's mission and vision, while also providing funding for youth program sponsorships.

(lewisvilleparkalliance.org/)

The City of Lewisville partners with the UNT Advanced Environmental Research Institute (AERI) to advance environmental research, urban planning, and sustainable infrastructure solutions. AERI conducts scientific studies that inform the city’s environmental policies, habitat restoration projects, and water quality monitoring efforts. Additionally, this collaboration supports the development of sustainable infrastructure and urban planning strategies that align with Lewisville's long-term ecological goals. By integrating research and innovation, the partnership helps the city make informed decisions that protect natural resources while fostering sustainable growth and enhancing environmental stewardship among residents.

(aeri.unt.edu/)