Envisioning a world with plentiful healthy wetlands improving water quality, climate, biodiversity, and human well-being.
Sandy Hollow Permanently Protected
Join twi in the field - upcoming Volunteer opportunities
On May 10, 2026 the Illinois Nature Preserves Commission approved the final dedication of Sandy Hollow as a nature preserve buffer addition to the Dore Seep Nature Preserve.
Our newest smart wetland
A new Smart Wetland in Loami, IL will remove excess nutrients from agricultural tile drainage water to help provide safe drinking water to approximately 165,000 Springfield residents’ taps.
PADDLING & FISHING SEason at the DIxon waterfowl refuge
The 2026 paddling and fishing season at the Sue and Wes Dixon Waterfowl Refuge extends from May 1st through September 7th. View this year’s fishing limits and plan your visit today.
Check out TWI’s upcoming volunteer opportunities and get ready to get your hands dirty helping plant native wetland and prairie species!
What is a wetland?
Check out our handy infographic to learn about the three characteristics that all wetlands share: hydrology, hydrophytic plants, and hydric soils.
Read our 30th anniversary annual report
TWI celebrated three decades of designing, restoring, and creating wetlands in 2025. View our special anniversary Annual Report to learn about our work through the decades and what comes next.