Since Netze BW Wasser GmbH buys 100% green electricity, the purchase of the gigawatt hour of electricity still required from the grid is CO₂-neutral. Even if the CO₂ emissions caused by the demand for fuels and gas (0.3 GWh and 1.2 GWh) are included in the balance sheet, the bottom line is that Netze BW Wasser GmbH's balance sheet shows approximately a remaining 1,900 tonnes of CO₂.
Netze BW Wasser GmbH currently operates 17 turbines with a total output of around 1.7 MW at 14 sites in the urban area of Stuttgart and, although the recovery of energy from drinking water is not promoted under the Renewable Energies Sources Act, it aims to further expand and even exploit small recovery potentials.
Since 2016, Netze BW Wasser GmbH has had a certified energy management system in accordance with ISO 50001, which helps to identify potential savings and sustainably reduce energy consumption. By supporting energy management systems in accordance with ISO 50001 at the Filderwasserversorgung and Strohgäu Wasserversorgung water utility associations, Netze BW Wasser GmbH also supports the continuous improvement of energy efficiency outside its own boundaries.