Rodenticides

also see wildlife/birds

Rodenticides (Chemical Watch Fact Sheet, Vol. 20, Pesticides and You, No. 4, 2000-2001) Sorry, this is old but still relevant. However many new chemicals have come on the market since then.

Ask Retailers to Care About Kids™
and Pull Toxic Pesticide Product from Shelves  Group Renews Call for Immediate Stop to Sale of Toxic Rodenticides     (Beyond Pesticides, May 30, 2014)  USA

Anti-coagulants are often the main method of rodent control and they have terrible effects on other species eating affected rodents. There are many new classes of anti-coagulants on the market. They are, of course, used in medicine for several conditions. However, they would likely, like most medications, come out at the other end and end up contaminating water. I haven't found any studies on that. 

I looked on the Internet for fact sheets regarding anti-coagulants and wildlife and am still searching. 

Study Finds Eagle Populations Experiencing Widespread Rodenticide Exposure    (Beyond Pesticides, April 21, 2021) 'The vast majority of bald and golden eagles in the United States are contaminated with toxic anticoagulant rodenticides, according to research published in the journal PLOS One earlier this month.   Prior studies have deemed anticoagulant rodenticides “super-predators” in ecosystems for the widespread damage that can result from their use. This is because rodents that eat these chemicals, often contained in toxic baits, do not die immediately. While a rodent is likely to die from this poison, ingesting it also turns it into a sort of poison trojan horse for any predator that may take advantage of its slow decline. An eagle that eats a poisoned rodent at the edge of death will be the next to succumb to the anticoagulant effects of the chemical.   The second-generation anticoagulant rodenticide brodifacoum was the most detected compound in sampled eagles.