25 cities covered
Texas water quality and radon, by city
22 of 25 covered Texas cities use chloramine in at least part of the system, and 15 have hard water. None of Texas's 254 counties is EPA radon zone 1, but EPA still recommends testing every home.
| City | Disinfectant | Hardness | Lead | PFAS | Radon |
|---|---|---|---|---|---|
| Houston | Chloramine | 5.6 gpg | 5 ppb | Not detected | Zone 3 |
| San Antonio | Chlorine | 10.5 gpg | 1.6 ppb | Detected | Zone 3 |
| Dallas | Chloramine | 6.5 gpg | 1.1 ppb | PFOA, PFOS | Zone 3 |
| Fort Worth | Chloramine | 6.3 gpg | 3 ppb | PFOA, PFOS | Zone 3 |
| Austin | Chloramine | 4.0 gpg | Not detected | PFOS | Zone 3 |
| El Paso | Chlorine | 8.2 gpg | 1.2 ppb | PFOS | Zone 3 |
| Arlington | Chloramine | 5.3 gpg | 1 ppb | PFOS | Zone 3 |
| Corpus Christi | Chloramine | 11.6 gpg | 1.7 ppb | Not detected | Zone 3 |
| Plano | Chloramine | 8.8 gpg | 1.4 ppb | Detected | Zone 3 |
| Lubbock | Chloramine | 12.0 gpg | 1.4 ppb | Not detected | Zone 2 |
| Laredo | Chloramine | 13.0 gpg | 1.4 ppb | Not detected | Zone 3 |
| Irving | Chloramine | 4.7 gpg | 1 ppb | PFOA | Zone 3 |
| Garland | Chloramine | 8.5 gpg | 1.2 ppb | Detected | Zone 3 |
| Frisco | Chloramine | 8.7 gpg | 2.3 ppb | Detected | Zone 3 |
| McKinney | Chloramine | 7.8 gpg | 0.9 ppb | Not detected | Zone 3 |
| Grand Prairie | Chloramine | 8.1 gpg | 1.2 ppb | PFOA, PFOS | Zone 3 |
| Amarillo | Chlorine | 6.2 gpg | 1 ppb | Not detected | Zone 2 |
| Brownsville | Chloramine | 12.3 gpg | Not detected | PFOS, PFOA | Zone 3 |
| Denton | Chloramine | 3.6 gpg | 1.5 ppb | Detected | Zone 3 |
| Killeen | Chloramine | 8.4 gpg | 1 ppb | Detected | Zone 3 |
| Mesquite | Chloramine | 8.3 gpg | 1.4 ppb | Detected | Zone 3 |
| Pasadena | Chloramine | 4.0 gpg | 3.7 ppb | PFOS | Zone 3 |
| McAllen | Chloramine | 12.3 gpg | 2.3 ppb | Not detected | Zone 3 |
| Waco | Chloramine | 6.1 gpg | 1.9 ppb | Not detected | Zone 3 |
| Midland | Chloramine | 22.2 gpg | 1.5 ppb | PFOS | Zone 3 |
Texas radon zones
Zone 1 (highest)0 counties
Zone 239 counties
Zone 3 (lowest)215 counties