First Naturally Filtered Pool in U.S. Opens in Minnesota

Aerial view of the Webber Park Natural Swimming Pool. Courtesy of the Minnesota Parks & Recreation Board.
Aerial view of the Webber Park Natural Swimming Pool. Courtesy of the Minnesota Parks & Recreation Board.

Following months of delays and years of planning, the Webber Park Natural Swimming Pool, the first naturally filtered swimming pool in the U.S., opened to the public in Minneapolis. Planning for the project started 10 years ago and construction on the $6 million facility began in 2013. 

Instead of using chlorine and other chemicals to filter the water, the water goes through a natural filtration system to clean it. This involves the water being emptied from the pool every 12 hours into a "regeneration" basin, where it is cleaned using gravel and approximately 7,000 aquatic plants and is then pumped back into the pool. Vacuum cleaners keep the surface of the pool clear of debris.

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