- What we have seen and measured are very strong so-called acid shocks in the county's watercourses.
It has been pH values down to four and it is known that a pH below five is harmful to organisms such as freshwater pearl mussels, crayfish, trout - basically all aquatic organisms, says Veronica Lundgren, environmental analysis officer at the county administrative board.
5,000 liters of dirty water per minute
The water that was pumped out of the gigantic flood of Österbågen in kilometer-long hoses by MSB at T-Udden on Brynäs was anything but clean.
5,000 liters per minute for two days were driven straight into the sea.
Gavleån in Gävle was brown, gooey and smelled bad for two days.
Add everything else that has washed out and rained down watercourses and the environmental impact is great.
Hear environmental analysis officer Veronica Lundgren about how animals and vegetation are affected by this in the video.