Life on earth cannot survive without water, yet we face more contaminants than ever before in our environment and drinking water supplies. Changing and increasingly stringent regulations mean there are new analytical challenges in testing drinking water. This is exemplified by compounds such as disinfection by-products generated during pre-treatment of water intended for human consumption, externally introduced per- and polyfluorinated alkyl substances (PFAS) and ionic pesticides. Ion chromatography is one of the most important analytical techniques in the inorganic water laboratory. In this episode of Teach Me in 10, Dr. Detlef Jensen, senior expert in applied markets at Thermo Fisher Scientific, will discuss this in detail. He will provide an explanation as to what is changing in drinking water regulations around Europe and what this means for labs, as well as teaching us ways to analyze HAAs and DBPs.