In July 2018, the Ministry of the Environment, Climate Protection and the Energy Sector Baden-Württemberg published the decree ‘Messen an RÜB’ (measuring at rainwater overflow basins). It stipulates that before the end of 2024 all rainwater overflow basins in operation need to be retrofitted with measuring equipment to record their filling and overflow behaviour. The concept for the retrofit had to be finished by the end of 2020. The Eigenbetrieb Stadtentwässerung Böblingen has commissioned IWR GmbH to prepare the concept for retrofitting stormwater overflow basins in operation with measuring equipment in accordance with the decree “Messen an RÜB” for the stormwater basins of the Eigenbetrieb Stadtentwässerung Böblingen. At the end of last year, the concept design report was successfully submitted. It comprised the retrofitting of 18 structures of centralised rainwater treatment until the end of 2024. Six of the basins will already be upgraded in 2021.