In 1970, Dietwil opened a teaching pool that was exceptional for such a small community. Following an initial refurbishment in 1997, the facility was expanded in 2008 to include a paddling pool and toilet facilities, financed by Raiffeisenbank.

The most recent comprehensive modernisation took place between 2022 and 2023: the pool was enlarged, the technical systems completely renewed and a new catering building constructed. The reopening was celebrated on 3 June 2023.