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Milfoil Treatment Begins Thursday Morning on the Flowage

June 17, 2026 8:22 PM | Anonymous

Save the Flowage · Treatment Update

Milfoil Treatment Begins Tomorrow Morning

Weather permitting — Thursday, June 18, 2026
 

After months of permit work, scientific surveys, fundraising, and community support — the MFA's first-ever ProcellaCOR herbicide treatment of Eurasian watermilfoil on the Minong Flowage is scheduled to begin tomorrow morning, Thursday, June 18, 2026, weather permitting.

Dale Dressel of Northern Aquatic Services — our licensed applicator under the Wisconsin DNR permit — will be on the water early and expects to work through most of the day. This notice is for all property owners and boaters who may be on or near the Flowage Thursday (6/18).

2026 Treatment Areas — 40 Acres Total

Five areas outlined in the Summer 2026 newsletter

DNR Landing / SNC 14.49 ac
ChantoCran Bay 6.05 ac
North Basin South 6.29 ac
East Shore 8.75 ac
Southeast Bay 4.42 ac

Maps of all five areas are on pages 3–4 of the Summer 2026 newsletter.

What You May See Tomorrow

What to Expect on the Water

You may see a white treatment vessel working in the five designated areas. Yellow notices will have been posted to docks and shorelines in or adjacent to all treatment areas. Please review the treatment area maps in the Summer 2026 newsletter if you are unsure whether an area near your property is included.

No-Wake Required

Please observe no-wake conditions in all treatment areas wherever you see a yellow notice posted. This applies to all watercraft for the duration of treatment activity. Slow down and give the applicator vessel wide clearance.

MFA Water Sampling in Progress

MFA Lake Management Committee volunteers will be collecting water samples in treated areas throughout the day — at 1, 4, 8, 24, 48, and 96 hours after treatment, and again at one week. If you see MFA volunteers in boats in treated areas, please give them clearance and maintain no-wake speed. Steve Johnson (LMC Chair) will cover Serenity Bay, North Basin, and the DNR Bay; Ron and Jeanne Brown will cover the southern sampling areas.

About ProcellaCOR & Safety

ProcellaCOR is a selective aquatic herbicide that targets milfoil at the cellular level while posing significantly less risk to native plants. At the concentrations used for this treatment, it breaks down quickly and poses no documented risk to humans when label guidelines are followed. The full DNR permit and treatment documentation are on the MFA documents page.

Full treatment area maps, background on how we got here, and answers to common questions about ProcellaCOR and what comes next are all in the Summer 2026 issue of The Flow — the MFA's new community newsletter.

Read the Summer 2026 Newsletter →
 

This is a moment years in the making for the Minong Flowage. We'll send an update after treatment is complete. Thank you for your patience, your support, and for looking out for our lake.

Questions? Contact the MFA Lake Management Committee Chair:

Steve Johnson · sjj8549@gmail.com · 715-466-2536
Or reach the MFA at minongflowage@gmail.com
Minong Flowage Association · P.O. Box 167, Minong, WI 54859
minongflowageassociation.wildapricot.org
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PO Box 167, Minong, WI 54859
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