Pennsylvania tap water by county
Hardness, PFAS sampling, lead and violations for the largest water systems in 10 Pennsylvania counties. In 10 of them, at least one large system detected PFAS in EPA testing (a detection isn't a violation).
| County | Largest system | Hardness | PFAS detected |
|---|---|---|---|
| Philadelphia County | Philadelphia Water Department | 72–270 mg/L (varies) (high) | 1 of 1 systems |
| Allegheny County | Pittsburgh Water & Sewer Auth | 5.8 gpg (low) | 1 of 6 systems |
| Montgomery County | Aqua Pa Main System | 7.5 gpg (low) | 6 of 6 systems |
| Bucks County | Lower Bucks Co Joint Mun Auth | 5.1 gpg (low) | 5 of 6 systems |
| Delaware County | Chester Water Authority | 5.1 gpg (low) | 2 of 2 systems |
| Lancaster County | City of Lancaster | 10.6 gpg (low) | 5 of 6 systems |
| Chester County | Pa American Royersford | 5.8 gpg (low) | 6 of 6 systems |
| York County | York Water Co | 5.0 gpg (high) | 3 of 6 systems |
| Berks County | Reading Area Water Authority | 7.0 gpg (low) | 5 of 6 systems |
| Lehigh County | Lca Allentown Division | 6.4 gpg (low) | 6 of 6 systems |
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
Hardness confidence: high = utility report; low = county estimate of untreated local water. Don't see your county? Use the water quality lookup.