17/04/2024
Numerous articles have been written in papers across the world, pleading with dog owners on behalf of their environmental agencies to stop letting dogs treated flea and tick treatments swim in rivers.
These chemicals are so powerful, so disruptive, that just one or drop drops on your dog days before can interfere greatly with the insect life in the river for some time.
Can you imagine?
Another source is washing the dogs and the stuff going down into the sewers.
There is no other conceivable source.
A 2020 research paper in the Science of the Total Environment Journal found fipronil (eg FRONTLINE) in 99% of samples taken across 20 river sites in England, with mean concentrations of fipronil and fipronil sulfone were 5.3 and 38.1 times their chronic toxicity limits. Amounts of Imidacloprid (in ADVANTAGE & SERESTO) exceeded the toxicity limit in 7/20 sample sites.
Citation: Rosemary Perkins, Martin Whitehead, Wayne Civil, Dave Goulson, Potential role of veterinary flea products in widespread pesticide contamination of English rivers, Science of The Total Environment, Volume 755
Thanks Dr. Judy Morgan's Naturally Healthy Pets for reminding me of this one.