Salina, KS – Atrazine is one of the most widely used weed-killers in the country. But farm fields aren't the only place the chemical is commonly found. It's also the most widely-detected pesticide in drinking water, especially in the Midwest. With some environmental groups calling for a ban on Atrazine, the Environmental Protection Agency is currently re-evaluating its safety. Kansas Public Radio's Bryan Thomspon reports.