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Water supply in Hildesheim: high quality of drinking water
The water supply in Hildesheim is largely ensured by EVI Energieversorgung Hildesheim GmbH & Co.KG. The drinking water for the city of Hildesheim comes from the reservoirs in the Harz Mountains (Harzwasserwerke GmbH). The extracted water from the water protection areas in the Harz Mountains is treated in the waterworks of the Harzwasserwerke. Via two transport pipelines, the water is brought together in the elevated tanks in Petze and from there it is piped towards the city area.
The exact treatment processes can vary depending on demand and water quality. The aim is to bring the water to a high hygienic standard. The drinking water supplied in the supply area of the city of Hildesheim is a Harz water mix that is drawn from the Sösetal Reservoir and the Granetal Reservoir. It is of such high quality that it also meets the strict criteria for baby food. Regular controls by external institutes permanently guarantee the high quality standard of the water.
The drinking water in the city of Hildesheim and the villages of Einum, Achtum, Uppen, Bavenstedt, Sorsum, Neuhof and Marienrode is assigned to hardness range 1 “soft” and has an annual average total hardness of 2.9 degrees “German hardness” (°dH). Drinking water is one of the most strictly controlled foodstuffs in Germany.


Compliance with the legal requirements of the Drinking Water Ordinance guarantees the consistently high quality of our drinking water. We ensure this high quality standard through regular controls. The treated drinking water is distributed via a network of pipes in Hildesheim.
The network includes main lines that transport the water to the various parts of the city, as well as smaller lines that supply individual households and businesses. The quality of the drinking water is regularly monitored to ensure that it complies with legal requirements and the requirements of the Drinking Water Ordinance. This involves extensive examinations and tests to ensure the purity and safety of the water.
Guaranteed water quality in Hildesheim: High-quality water supply for the city
Guaranteed water quality in Hildesheim: High-quality water supply for the city
EVI Energieversorgung Hildesheim GmbH & Co.KG largely guarantee the water supply in Hildesheim and place particular emphasis on ensuring consistently high water quality.
The exact treatment processes can vary depending on the demand and quality of the water. The main goal of treatment is to bring the water to a high hygienic standard.
To ensure the high quality standards of drinking water, the water is subject to permanent monitoring by external institutes. Regular checks ensure that the water complies with legal requirements and the requirements of the Drinking Water Ordinance.
Drinking water is one of the most strictly controlled foodstuffs in Germany, and compliance with the legal requirements of the Drinking Water Ordinance ensures consistently high quality.
In addition, EVI Energieversorgung Hildesheim GmbH & Co.KG is involved in environmental education school projects, such as “Drinking Water”, to sensitize schoolchildren to the need to use water consciously. Wasserparadies Hildesheim also offers visitors an outstanding swimming experience with guaranteed water quality thanks to water treatment and filter systems.
Overall, EVI Energieversorgung Hildesheim provides a reliable water supply and ensures that drinking water meets high quality standards and legal requirements.