The following website shows the contaminant levels in our drinking water. Type in your zip code and click on your water utility. The large encircled number is their (EWG) quality rating (low number is better).
Note: several years ago I was told by Covington Water District that during the summer when their wells aren’t producing sufficient quantities that they buy water from Auburn Water District. I note that Auburn’s water has more contaminates then Covington.