Aquatic Invasive Species

Join Statewide Aquatic Invasive Species Search

Snapshot Day is a statewide, one-day event connecting volunteers, water lovers, and local conservation groups in a search for aquatic invasive species (AIS). You can help protect Wisconsin’s rivers, lakes, and wetlands from invasive plants and animals that may negatively impact habitat, wildlife, recreation and health. This event is coordinated in partnership with UW-Madison Division of Extension, Wisconsin Department of Natural Resources, local partners, and YOU!

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Nitrate Screening Clinics

Nitrate Screening Clinics Remain Popular

St. Croix County’s June nitrate screening clinic in Baldwin drew 126 participants, with 37% of untreated samples testing above the federal health standard of 10 mg/L. These results are higher than the county average, highlighting the importance of regular well water testing, especially for households relying on private wells. Free nitrate screenings will continue throughout the summer and fall at locations across the county.  The clinics are coordinated by St Croix County Land and Water Conservation and Public Health.

Upcoming clinics:

Tuesday, July 15th, 2025 | 1:00–5:00 PM | Wilson Community Center – 440 Main St, Wilson

Tuesday, August 12th, 2025 | 1:00–5:00 PM | Deer Park Library – 112 Front Street West, Deer Park

Thursday, September 11th, 2025 | 1:00–5:00 PM | St. Croix County Services Center – 1752 Dorset Lane, New Richmond

For tips on collecting a sample visit our Collecting a Water Sample webpage.

Fighting Buckthorn

Help is available to control invasive Buckthorn

Do you have a Buckthorn problem on your land?  Have you almost given up trying to control this invasive tree? Are you interested in receiving guidance on how best to control Buckthorn on your property?

St. Croix County Land and Water Conservation is part of the St. Croix–Red Cedar Cooperative Weed Management Area (SC-RC CWMA), which is a collaborative of invasive species managers coordinated by the Wild Rivers Conservancy. The SC-RC CWMA work area encompasses St. Croix, Polk, Barron, Washburn, and Burnett Counties. It is dedicated to fostering multi-generational awareness of invasive species and using partnerships to prevent and limit the intrusive impacts of those invasive species.

The CWMA is sponsoring Buckthorn Treatment Workshops this late summer and fall to help educate landowners about the best methods for achieving buckthorn removal on their properties.

Polk County | Friday September 5th

Washburn County | Friday September 19th

Barron County | Friday August 22nd

Register Here for the workshops.