The short answer is yes. While the Environmental Protection Agency regulates municipal tap water and sets legal limits on certain contaminants, and most water utilities generally stay within these limits, “some of the legal limits may be too lenient,” said Paul Pestano, a research analyst with the Environmental Working Group.
And more than half of the chemicals found in municipal water are not regulated.
Using the right water filter can help further reduce pollutants like lead from old water pipes, pesticide runoff in rural areas and byproducts of chemicals like chlorine that are used to treat drinking water.
Radon, arsenic and nitrates are common pollutants in drinking water, and trace amounts of drugs including antibiotics and hormones have also been found. Certain filters may help remove these impurities as well.