June 21, London— Scientists in the UK have found that some chemicals used on pets and farms are now polluting rivers. They may cause harm to fish and other animals living in rivers.
The study, led by experts from the British Geological Survey and the University of Nottingham, focused on two rivers in England: The Tone and the Wensum. Tests were done on river water, soil, fish, and small creatures.
One chemical they found is called fipronil. It is used in flea treatments for dogs. It likely enters rivers when dogs swim or are bathed. Fipronil is very harmful to small water animals.
Another chemical found is propiconazole, which farmers use to stop fungus on crops. It could be bad for fish health as well.
The scientists also found neonicotinoids, which are very strong insect killers. Just a little of these chemicals can be dangerous to insects in the water. In many places, the levels found were above the safe limit.
Many people use flea treatments on pets even when they do not have fleas. Scientists now say people should not use these treatments unless needed. They suggest using tablets or oral treatments, which are safer for the environment.
Dr. Christopher Vane from the BGS said that while these products help protect crops and pets, they are now getting into rivers and may damage nature. He said there must be better rules and safer ways to use these chemicals.
This is one of the most detailed studies ever done on pesticides in UK rivers. The scientists say more studies are needed in other rivers and countries too.
