Indiana tap water by county
Hardness, PFAS sampling, lead and violations for the largest water systems in 4 Indiana counties. In 3 of them, at least one large system detected PFAS in EPA testing (a detection isn't a violation).
| County | Largest system | Hardness | PFAS detected |
|---|---|---|---|
| Marion County | Citizens Water - Indianapolis | 18.5 gpg (high) | 2 of 3 systems |
| Lake County | Indiana American Water - Northwest | 9.8 gpg (low) | 0 of 6 systems |
| Allen County | Fort Wayne - 3 Rivers Filtration Plant | 16.9 gpg (low) | 2 of 3 systems |
| Hamilton County | Carmel Water Department | 19.0 gpg (low) | 1 of 4 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.