Our pitcher filter removes up to 99.99% of tap water contaminants. This includes fluoride, chlorine, pesticides, trace pharmaceuticals and other known menaces of municipal tap water. The straw’s patented filtration technology meets and exceeds NSF Standards 42 and 53 for contaminant reduction. This means that it is certified to make water odorless and fresh-tasting, as well as remove a variety of health-related contaminants like VOCs and MTBEs. Better still, it does all this without removing health-essential minerals from the water.Here's list of key contaminants that it removes from tap water and what the EPA says about potential long-term health effects to you and your family.Fluoride: Longterm exposure to Fluoride can cause Fluorosis.Atrazine: Exposure to Atrazine can lead to cardiovascular damage or reproductive difficulties.Lead: Childhood exposure to lead can hinder physical development and cause learning disabilities.Chromium 6: The indigestion of Chromium-6 may be carcinogenic according to the EPA.Cadmium: Exposure to cadmium can cause liver damage.Chlorine: Chlorine combines with organic material in tap water to create harmful by-products like Trihalomethanes and Chloroform,Mercury: Mercury from agricultural and industrial runoff can cause kidney damage over time.For a full list, check out our Testing & Certifications page. And we're always looking for new contaminants to test and doing new testing, so be sure to keep checking back on it!