Charlottetown Water Hardness & Quality Report (2026)
Water Hardness
Source
groundwater
pH Level
7.7
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
255 mg/L
Est. Daily Cost
$0.35
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 Charlottetown, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Charlottetown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.3 yrs | 8.5 yrs | -38% |
| Washing Machine | 8.8 yrs | 12 yrs | -27% |
| Water Heater | 10.4 yrs | 15 yrs | -31% |
Regional Water Comparison
How Charlottetown compares to its nearest neighbours
| City | Hardness | Mineralization | Risk |
|---|---|---|---|
| ▶ Charlottetown, Prince Edward Island | 130 mg/L | High | 🟠 Hard |
| Stratford, Prince Edward Island | 188.5 mg/L | Very High | 🔴 Very Hard |
| Summerside, Prince Edward Island | 120 mg/L | High | 🟠 Hard |
| New Glasgow, Nova Scotia | 49.5 mg/L | Low | 🟢 Soft |
| Truro, Nova Scotia | 32 mg/L | Low | 🟢 Soft |
National Benchmark
How Charlottetown compares to the Canada average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Charlottetown | 130 mg/L | 🟠 Moderate |
| Canada National Avg | 141 mg/L | 🟠 Moderate |
| Vancouver Top Rated | 3 mg/L | 🟢 None |
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What Makes Charlottetown's Water Unique?
Local geology and source profile
Charlottetown's drinking water is managed by the City of Charlottetown, drawing entirely from groundwater through a network of municipal wells tapping the Charlottetown Aquifer — the principal drinking water aquifer for PEI's provincial capital. Water is treated with filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 130 mg/L (7.6 gpg) — classified as hard by Health Canada, characteristic of the Permian-Carboniferous Red Bed sandstone aquifer of Prince Edward Island.
Charlottetown's subsurface geology consists of Permian and Carboniferous red sandstone, siltstone, and mudstone of the Pictou Group and Kildare Capes Formation — continental red bed deposits formed in a semi-arid basin environment similar to the American Southwest, permeated by calcium carbonate cement and traces of gypsum (calcium sulphate). Groundwater percolating through these sandstone formations dissolves the carbonate cement and gypsum, producing the hard, moderately mineralised water characteristic of PEI municipal wells throughout the island. The 130 mg/L at Charlottetown is typical of PEI aquifer supplies, reflecting the island's uniformly red-bed sandstone geology.
At 130 mg/L, Charlottetown residents experience noticeable scale deposits on kettle elements, showerheads, and in hot water tanks — descaling every six to eight weeks is advisable, and annual hot water tank inspection and flushing are recommended. The City of Charlottetown provides water quality information at charlottetown.ca; as the provincial capital, Charlottetown's water system is monitored rigorously in compliance with PEI's Environmental Protection Act and Health Canada Guidelines for Canadian Drinking Water Quality standards.
Geology & Source: Supplied by City of Charlottetown from Charlottetown Aquifer groundwater — wells in Permian-Carboniferous sandstone (PEI Red Beds) with carbonate cement and sulphate minerals produce hard groundwater at 130 mg/L (7.6 gpg).