The Nature Conservancy, TNC, in Illinois is engaged in working with partners on implementation and long-term water quality monitoring in the Mackinaw River watershed to understand how implementation of conservation practices affects water quality at multiple scales, and to gain insights related to outreach, practice delivery, and partnerships that can inform TNC and partner work on other programs and in priority watersheds. This work includes both critical edge-of-field practices – the design and efficacy of constructed wetlands to treat tile drainage water – and stacked infield and edge-of-field practices and their synergies for water quality. The TNC’s research provides hard data on practice design and efficiency of these farm bill conservation practices that address nutrients in tile drainage water. Key partners for the Mackinaw River watershed project include the McLean County Soil and Water Conservation District, McLean County Natural Resources Conservation Service, University of Illinois Urbana-Champaign, and Illinois State University. TNC has ongoing projects at the Franklin Research and Demonstration Farm in Lexington, and the Paired Watershed Study in the headwaters of the Mackinaw River. TNC also has con- ducted/hosted trainings on edge-of-field practices and, in 2021, published a roadmap for increasing the pace and scale of edge-of-field practice adoption and implementation. For more information, see www.nature.org/en-us/get-involved/how-to-help/places-we-protect/the-mackinaw-river-watershed.