You can tell by the signs.

The point is the camp site was fine from a health and safety perspective. There are more heavily contaminated areas outside and it saw little impact due to the weather back then.

Which leaves either damage to roads that might not have seen much use before (doubtful, they have police driving around to catch real life Stalkers), lost Russians or the fires Greenpeace mentioned.

Some context for the heightened readings would be nice. Especially in comparison to the fires in March and 2020. They seem to be an obvious cause.

edit: Vehicle impact sounds quite likely https://www.reuters.com/world/europe/unprotected-russian-sol...

Maybe dont drive tanks through the red forest.