Mercer County water hardness
Mercer County is anchored by Trenton Water Works, a Delaware River surface supply, alongside investor-owned systems serving the townships.
Across the 1 Mercer County municipalities with published figures, hardness averages 4.3 grains per gallon — moderately hard water on the USGS scale. Because most towns here buy treated water rather than produce it, neighbouring municipalities on the same system report the same number; the systems represented below are Trenton Water Works.
1 of 1 records
| mg/L | Class | Source | |||
|---|---|---|---|---|---|
| Trenton | 4.3 | 74 | Moderately Hard | Trenton Water Works | Trenton Water Works CCR 2024 |
Every Mercer County town page
Each municipality has its own page with the reported figure, the system that supplies it, what the level means in practice locally, and the report the number was read from.
The extremes in Mercer County are Trenton water hardness at 4.3 gpg.