Cities of the United States either use chlorine or chloramine to keep drinking water free from bacteria as it's distributed to homes. Knowing which one is in your water can be important for many reasons, including knowing what water filter to choose.
Chlorine can be reduced using standard carbon filtration systems, while chloramine requires catalytic carbon filters for effective reduction.
Each entry in this resource has been verified directly from primary sources, which typically means we located the data in an official municipal water quality report or we spoke to the water utility directly. If your city is not listed, let us know and we will verify it and add it right away.
Click your state to see the full list of cities and their disinfectant type.
Don't see your state or city yet? We are adding new data regularly. Request your city and we'll prioritize it!