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Rappbode Reservoir looking west along the main axis from the Rotestein. Wikipedia Commons License.
23 Oct 2024

Concerns about the use of flame retardants affecting drinking water in German drinking water reservoir

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During a fire on the Brocken in September, a fire retardant was used for the first time, raising concerns about possible impacts on the water quality of the Rappbode reservoir. It supplies drinking water to around two million people, the German radio site MDR Aktuell reports.

An MDR AKTUELL listener inquired about the reasoning behind the use of the product RetStop and the potential consequences for the water.

Despite concerns from the park administration, which opposed the use of the fire retardant due to its water hazard classification, the decision  to use it was made after consultation with multiple authorities. 

District Fire Chief Kai-Uwe Lohse explained that the composition of the product was thoroughly examined, and the decision was made in close coordination with those responsible for the drinking water catchment area. The water quality in the Rappbode reservoir has not been affected so far, and the application site continues to be monitored.

The fire retardant "RetStop" is described as environmentally friendly by the distributor, "MainFire." All ingredients are approved as food additives within the EU, and the manufacturer claims it is not harmful to plants, animals, or humans. However, the safety data sheet does caution that the product should not enter bodies of water.

The national park administration, represented by Director Roland Pietsch, voiced criticism of its use. Due to the lack of approval and the unclear composition of the product, they could not rule out negative effects on the water. 

Nevertheless, Pietsch expressed understanding for the rapid decision made by the incident command under the circumstances. Ultimately, the retardant was applied preventively over a six-hectare area of the national park to stop the spread of the fire – a precaution that turned out to be unnecessary, as the fire, contrary to forecasts, did not reach the treated area due to changing wind conditions.

 

Photo Credit: Wikipedia Commons License.
The reservoir looking west along the main axis from the Rotestein.
Cover Photo: By Bermicourt - Own work, CC BY-SA 3.0
Photo left: By The original uploader was MarianSz at German Wikipedia. - Transferred from de.wikipedia to Commons by Ludmiła Pilecka using CommonsHelper., CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=5001082