3 cities covered
Oregon water quality and radon, by city
1 of 3 covered Oregon cities use chloramine in at least part of the system, and 0 have hard water. None of Oregon's 36 counties is EPA radon zone 1, but EPA still recommends testing every home.
| City | Disinfectant | Hardness | Lead | PFAS | Radon |
|---|---|---|---|---|---|
| Portland | Chloramine | 1.1 gpg | 4.9 ppb | Not detected | Zone 2 |
| Salem | Chlorine | 0.9 gpg | 2 ppb | Not detected | Zone 3 |
| Eugene | Chlorine | 1.1 gpg | 4.5 ppb | Not detected | Zone 3 |
Oregon radon zones
Zone 1 (highest)0 counties
Zone 221 counties
Zone 3 (lowest)15 counties