2 cities covered
Pennsylvania water quality and radon, by city
1 of 2 covered Pennsylvania cities use chloramine in at least part of the system, and 1 have hard water. 49 of Pennsylvania's 67 counties are EPA radon zone 1.
| City | Disinfectant | Hardness | Lead | PFAS | Radon |
|---|---|---|---|---|---|
| Philadelphia | Chloramine | 7.4 gpg | 2 ppb | PFOA, PFOS | Zone 3 |
| Pittsburgh | Chlorine | 5.8 gpg | 2 ppb | Not detected | Zone 1 |
Pennsylvania radon zones
Zone 1 (highest)49 counties
Zone 217 counties
Zone 3 (lowest)1 counties