After local thunderstorms at the beginning of the week, Martin Sommar visited Råån and then discovered several dead fish, something HD was the first to tell.
- There were six, seven dead trout and I saw fish swimming around and suffocating, he says.
This is not the first time Råån has suffered fish deaths.
In 2019, sea trout, eels, crustaceans and other organisms were wiped out in connection with heavy rainfall, and last year parts of the river's sea trout stock were wiped out in connection with heavy rain.
Third year in a row
Both the municipality's environmental administration and NSVA, Northwest Skåne's water and sewage have tried to find the cause - but without success.
- It is almost on the day for the third year in a row that we are part of this.
No one finds the source of it even though time and money have been put into it.
They probably make an attempt but I do not think you do enough, says Martin Sommar.
One reason for the fish death is believed to have been that oxygen-poor water from the stormwater dam to the Ättekulla industrial area flowed into the river.
To avoid this, NSVA has closed the dam this year - but it has not helped.
- The measures we have taken in the VA facility have not given the results we hoped for.
It is something else that happens and affects the river, says Pär Gustafsson, head of department at NSVA.
Continued investigations
Following the discovery this week, both the environmental administration and the Ecology Group, which works on behalf of NSVA, have been on site at Råån.
- I do not know much about the cause of the fish death this time, but it is probably due to the release of oxygen-polluting substances that have been added somewhere in the river, says Karl Holmström, biologist at the Ecology Group.
Now the work continues to try to find the cause of the fish death.
- Normally, discharges of stormwater do not cause any giant oxygen consumption, but it seems to be added to something particularly unfavorable in some place, says Karl Holmström.