Greater Napanee Water Hardness & Quality Report (2026)
Water Hardness
Source
lake
pH Level
7.8
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
378.9 mg/L
Est. Daily Cost
$0.45
energy & soap waste
Source: Health Canada Water Quality · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Greater Napanee, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Greater Napanee | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.8 yrs | 15 yrs | -41% |
Regional Water Comparison
How Greater Napanee compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Greater Napanee, Ontario | 169 mg/L | High | 🟠 Hard |
| Prince Edward, Ontario | 202.5 mg/L | Very High | 🔴 Very Hard |
| Belleville, Ontario | 110 mg/L | Medium | 🟡 Moderately Hard |
| Kingston, Ontario | 105 mg/L | Medium | 🟡 Moderately Hard |
| Quinte West, Ontario | 166 mg/L | High | 🟠 Hard |
National Benchmark
How Greater Napanee compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Greater Napanee | 169 mg/L | 🟠 Moderate |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Greater Napanee's Water Unique?
Local geology and source profile
Greater Napanee's drinking water is managed by the Town of Greater Napanee, drawing from a lake source in Lennox and Addington County on the eastern Lake Ontario shoreline — Greater Napanee is a historic market and industrial town on the Napanee River, serving as the administrative centre of Lennox and Addington County between Kingston and Belleville on the Highway 401 corridor, known as a service community for the eastern Ontario agricultural plain and the Kaladar–Denbigh limestone and marble quarrying district. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 169 mg/L (9.9 gpg) — classified as hard by Health Canada, consistent with the eastern Ontario lake supply character.
Greater Napanee's 169 mg/L is slightly softer than Cobourg (183.5 mg/L from batch 21) further west on the north Lake Ontario shore, and consistent with the eastern Lake Ontario basin where the water is somewhat less mineralised than the western-basin Toronto supply. The Napanee River drains the Ordovician limestone and dolostone of the eastern Ontario lowlands (the Napanee Plain), but the lake intake for the municipal supply draws from Lake Ontario's eastern basin. The eastern Lake Ontario shows a moderate hardness gradient decreasing from the harder western zones toward the Kingston area.
At 169 mg/L, Greater Napanee homes experience regular scale deposits — monthly to bimonthly kettle and showerhead cleaning is typical. Hot water tanks benefit from periodic inspection and flushing. The Town of Greater Napanee provides water quality information at greaternapanee.com. Health Canada lead precautionary guidance applies to older pre-1975 properties in the historic Napanee townsite and adjacent Lennox and Addington rural communities.
Geology & Source: Supplied by Town of Greater Napanee from a Lake Ontario or local Napanee River lake source in Lennox and Addington County — the Greater Napanee supply from the eastern Lake Ontario corridor produces hard water at 169 mg/L (9.9 gpg).