Initial Posting: 6/12/2019    Last Update: 8/30/2019
Answer: Plastic pollution in drinking water is a growing concern, with recent studies finding much of the world's tap and bottled water to be contaminated with small bits of plastic known as microplastics. Traditional water filters can remove heavy metals like lead and mercury, microbial contaminants, particulates such as sand, and some filters may help to remove certain industrial chemicals, herbicides or pharmaceuticals.
We have not yet tested common, above-the-counter filters such as Brita, Pur, Propur, and Lifestraw to determine their abilities to remove microplastics from tap water. However, based on a review of their claims and filtering abilities, they should be able to clear substantial amounts of microplastics. More sophisticated filtration systems are necessary to more completely remove microplastics from tap water. See the full answer for details.
ConsumerLab will be testing home water filters for their ability to filter microplastics and other water contaminants, with results expected in early 2020.