Specific investment costs and costs of redevelopment for communal waste water treatment plants

The Bavarian Water Policy Adminsitration needs current data of costs concerning communal wastewater treatment plants and sewer system parts for example for giving gratuities. Therefore the Bayerische Landesamt für Umwelt (LfU) delegated the Technische Universität München (TUM) with the raise and evaluation of specific investment costs and costs of redevelopment. Within this study costs of deducted new development and rehabilitation projects in the field of wastewater treatment plants (WWTP) and sewer building are collected. A broad data collection was carried out in Bavaria. These data originate from the last 11 years (2001-2012).

549 sewer system parts with a total length of 180 km and investment costs of around 57 Mio. € were collected. Specific investment costs are given in €/m and different important influences to the investment costs are analyzed (e.g. sewer size, material, time of building or soil conditions). Additionally 151 special sewer system parts with investment costs of around 59 Mio. € were collected. The WWTP data are separated in total WWTP (e.g. biological treatment plants) and WWTP parts (different treatment steps of a WWTP). In total 28 WWTP (Investment costs around 90 Mio. €) and 119 WWTP parts (Investment costs around 133 Mio. €) were collected.

Beside the specific costs, data boundary conditions and characteristics of the projects were collected to guarantee a meaningful evaluation. Results are given as boxplots, mean values, regression curves or bar charts. Detailed results are available in the final report. A publication of the results is in progress. Data should be updated regulary.