Maryland tap water by county
Hardness, PFAS sampling, lead and violations for the largest water systems in 4 Maryland counties. In 2 of them, at least one large system detected PFAS in EPA testing (a detection isn't a violation).
| County | Largest system | Hardness | PFAS detected |
|---|---|---|---|
| Montgomery County | Washington Suburban Sanitary Commission | 58–213 mg/L (varies) (high) | 3 of 3 systems |
| Prince George's County | City of Bowie | 4.1 gpg (low) | 0 of 1 systems |
| Anne Arundel County | Glen Burnie-Broadneck | 2.3 gpg (low) | 0 of 6 systems |
| Baltimore city | City of Baltimore | 5.3 gpg (low) | 1 of 1 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.