De Grachtwacht

How beautiful the canals of Leiden are! With De Grachtwacht (translated: The Canalwatch) we’re working towards plastic-free canals and raising awareness about the urban nature in and around the water. With our canoe fleet, we organise weekly clean-ups and conduct real scientific research on plastic pollution. We’re not just cleaning the city; we’re also analysing where this waste comes from so we can turn off the tap at its source. You can join our clean-ups, either in a canoe or walking along the quayside—over 1,000 volunteers have already joined us!

Our most exciting finds are displayed in the windows of the bridge keeper’s house on the Marebrug in Leiden. Right above the canal, this is where we coordinate clean-up activities, welcome our volunteers, and process the materials collected. Want to make a bigger impact with De Grachtwacht? You can! Join our team of Grachtwachters. From leading clean-ups to fundraising, we’re always looking for support. Ask us about the possibilities.

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Support our work Our clean-ups, research, and exhibitions rely entirely on funding and donations. Donate here to help us keep going—every contribution counts. Enjoy the clean canals!