1 city covered
District of Columbia water quality and radon, by city
1 of 1 covered District of Columbia cities use chloramine in at least part of the system, and 0 have hard water. None of District of Columbia's 0 counties is EPA radon zone 1, but EPA still recommends testing every home.
| City | Disinfectant | Hardness | Lead | PFAS | Radon |
|---|---|---|---|---|---|
| Washington | Chloramine | 6.8 gpg | 2 ppb | Not detected | No zone |
District of Columbia radon zones
Zone 1 (highest)0 counties
Zone 20 counties
Zone 3 (lowest)0 counties