In addition to the maintenance and monitoring of watercourses in the city of Salzgitter, the lower water authority is responsible for maintaining the cleanliness of surface waters and groundwater.
The lower water authority approves the use of bodies of water as well as the construction and significant modification of structures on and in surface waters. It is also responsible for monitoring facilities for handling substances hazardous to water and for issuing permits for the indirect discharge of wastewater into the public wastewater system (sewer system).
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