Substances hazardous to water; accident reporting

Accidents involving substances hazardous to water can, for example, cause fish to die or contaminate soil and groundwater. They must be reported immediately to the police or the fire brigade (emergency call 110 or 112). The fire brigade will then take immediate measures to avert the danger.


Substances hazardous to water are solid, liquid or gaseous substances and mixtures which are capable of causing adverse changes to the water quality on a permanent basis or to a not merely insignificant extent and which are classified as hazardous to water or are considered hazardous to water in accordance with Chapter 2 AwSV. If such substances escape in the event of an accident, they can lead to water pollution either via the direct route into a body of water or via seepage through the soil.

In the event of accidents involving substances hazardous to water, the municipal fire brigades (volunteer fire brigades and professional fire brigades) perform the compulsory task of the municipalities to avert danger in the event of accidents in accordance with Article 1 of the Bavarian Fire Brigade Act (BayFwG).

It is therefore necessary to inform the fire brigade or police as soon as possible in the event of such accidents. Not only the plant operator but also the person who fills or empties, decommissions, dismantles or removes, maintains, repairs, cleans, monitors or inspects a plant is legally obligated to notify the fire brigade or the police (cf. Art. 24 Para. 2 AwSV).

Give as precise information as possible, in particular on the accident site and time, as well as the type and quantity of substances released.

The fire brigade operations centre or police station will then take over the alerting of other agencies such as the district administrative authority, municipality, water management office etc..


Please inform the fire department or police immediately.

Status: 01.08.2021

Responsible for editing: Bayerisches Staatsministerium für Umwelt und Verbraucherschutz

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