| County | Water wells per birth | Violations per birth | RR |
| North East Group | |||
| Susquehanna | 13.5 | 1.9 | 2.7 |
| Bradford | 9.7 | 1.03 | 1.7 |
| Wyoming | 9.45 | 0.44 | 1.5 |
| Lycoming | 4.9 | 0.51 | 2.0 |
| Tioga | 11.9 | 1.16 | 1.5 |
| All North East | 8.4 | 0.22 | 1.67 |
| South West Group | |||
| Washington | 2.5 | 0.08 | 1.27 |
| Westmoreland | 2.1 | 0 | 1.1 |
| Greene | 5.4 | 0.25 | 1.17 |
| Butler | 5.7 | 0 | 0.9 |
| Fayette | 1.13 | 0 | 1.3 |
| All South West | 3.01 | 0.007 | 1.28 |