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Kingston Drinking Water Quality
By OpenStats · Built from official Canadian sources
Direct municipal dataA
Water quality grade
Excellent
Graded against Health Canada drinking water guidelines
Lead within guidelinepH in range
Hardness vs provincial average114 mg/L · prov. avg 182 mg/L
Lead vs provincial average0.5 μg/L · prov. avg 0.4 μg/L
Hardness
114 mg/L
Lead
0.5 μg/L
≤ 5 μg/L
pH
6.8
6.5–8.5 range
Hardness
114 mg/L
Moderate
Lead
0.5 μg/L
Max: 5 μg/L
pH
6.8
6.5–8.5
Chlorine
1 mg/L
Max: 4 mg/L
From source to sink
Where Kingston water comes from
Lakes, rivers, wells, and treatment plants behind the kitchen tap, in plain language. Chemistry grades above are a separate lab snapshot; this section is the route the water travels.
Open the full tap storyOn the map
Where Kingston water lives
Source waters and treatment plants pinned from published utility names. Open a pin below for the full OpenStreetMap view.
- CityKingston
Municipal service area
- Treatment plantPoint Pleasant Water Treatment Plant
Approximate pin near Kingston (exact plant coordinates pending)
- Treatment plantKing Street Water Treatment Plant
Approximate pin near Kingston (exact plant coordinates pending)
Map data © OpenStreetMap contributors. Pins are approximate for orientation, not legal survey points.
Where it starts
Surface water
Research confidence: high
Named source waters
- Lake Ontario (at the mouth of the St. Lawrence River)
Treatment plants
Point Pleasant Water Treatment Plant
Utilities Kingston / City of Kingston plant with a 1.2 m intake about 570 m offshore at roughly 18 m depth. Supplies Distribution Area 1 (Pressure Zones 1 and 2).
King Street Water Treatment Plant
Second Lake Ontario plant with intake about 1 km offshore at roughly 18 m depth. Supplies Distribution Area 2 (and Area 3 via James Street booster).
How it reaches your street
Combined Kingston Drinking Water System serves about 132,500 people across three distribution areas with elevated tanks and reservoirs (O’Connor, Progress, Creekford, Tower Street, Third Avenue among them).
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Reading this page
Kingston's most recent drinking water sample (2026-07-22) reports hardness of 114 mg/L, classified as moderately hard, and pH 6.8, drawn from a surface water source and treated at Kingston Water Treatment Plant. Lead measured 0.5 μg/L and fluoride 0.5 mg/L.
Free chlorine measured 1 mg/L in this sample. No E. coli was detected in this sample.
Kingston's hardness of 114 mg/L is below the Ontario average of 182 mg/L across 51 tracked municipalities, with a provincial average pH of 7.5.
These readings summarize a single compliance snapshot, not a certification of the water reaching your tap. Test your own water periodically, especially on a private well, and consider a softener if hardness is classified hard or very hard.
How to use this page: read the headline metrics first, then where the water comes from (map and tap story), then the parameter table and source footer.
All monitored parameters meet Health Canada guidelines.
All health parameters meet Health Canada guidelines with comfortable pH, hardness, and turbidity.
Figure 1 · From source to sink
How drinking water reaches your tap
Compared to provincial average
Ontario · 51 cities in sample
Hardness (city vs Ontario avg)114 mg/L
pH (city vs Ontario avg)6.8
Lead (city vs Ontario avg)0.5 μg/L
Fluoride (city vs Ontario avg)0.5 mg/L
Provincial average: hardness 182 mg/L · pH 7.5 · lead 0.4 μg/L · fluoride 0.6 mg/L
Full parameters
| Parameter | Reading | Health Canada guideline | Status |
|---|---|---|---|
| Hardness | 114 mg/L | No health limit (aesthetic) | Compliant |
| pH | 6.8 | 6.5–8.5 | Compliant |
| Lead | 0.5 μg/L | ≤ 5 μg/L | Compliant |
| Fluoride | 0.5 mg/L | ≤ 1.5 mg/L | Compliant |
| Chlorine (free) | 1 mg/L | ≤ 4 mg/L | Compliant |
| Turbidity | 0.6 NTU | ≤ 1 NTU (typical target) | Compliant |
Alberta water licences
WaterRegister.ca
On a private well or holding an Alberta water allocation licence? Water Register maps EPA licence records, transfer comparables, and watershed context across the province.
Explore WaterRegister.ca →Drinking water filters and test kits
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Source · Utilities Kingston water treatment plant annual reports. Last updated 2026-07-22. Refreshed on the site's automated schedule.