Velora Water: Kingston Ontario Water Quality Overview

City of Kingston Drinking Water Quality Overview – 2025

Kingston receives its drinking water primarily from Lake Ontario, treated at the Kingston Central Water Treatment Plant and supporting facilities. The water meets all provincial standards with strong compliance. While safe, many Kingston homeowners install premium filtration to improve taste, reduce hardness, and address potential issues from older plumbing in established and historic neighbourhoods.

Quick Facts

100% Regulatory Compliance in 2025
Lake Ontario Primary Source
~140,000+ Kingston Residents Served
~100–130 mg/L Typical Hardness

Water Source & Treatment

Source: Lake Ontario, treated at the Kingston Central Water Treatment Plant and supporting facilities. The city maintains its own distribution system and local infrastructure.

Velora Water Systems water quality summary and report for Kingston, Ontario – municipal water analysis with hardness, chlorine, and contaminant levels plus recommended filtration solutions

Google Maps view of Kingston, Ontario – service area for Velora Water Systems luxury residential and light commercial water filtration

Aerial view of Kingston, Ontario looking over the waterfront, downtown, and surrounding neighbourhoods where Lake Ontario meets the St. Lawrence River – Velora Water Systems service area for premium water filtration and softener systems

Heat map from this location showing Velora Water Systems outreach across its full Ontario service area and beyond, including supplier connections and regional coverage, go back from Kingston to the Service Area Page

Parameters

Typical Level

Ontario Standards (MAC)

Notes:

PH

7.4 – 7.7

6.5 – 8.5

Optimal range

Total Hardness:

~125–130 mg/L

No MAC

Harder than Central Toronto

Calcium

35 - 38 mg/L

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Contributes to hardness

Sodium

15–18 mg/L

20 mg/L (AO)

Low:

suitable for most low-sodium diets

Lead (at treatment plant)

< 1 µg/L

5 µg/L

No lead added at plants

THMs (average)

< 50 µg/L

100 µg/L

Disinfection byproduct:

well below limit

Note: All regulated microbiological, chemical, and radiological parameters met Ontario Drinking Water Quality Standards in 2025.

Key Water Quality Parameters (2025)

pH: 7.4–7.7 (optimal)
Total Hardness: ~80–120 mg/L (moderately soft to moderately hard)
Calcium: ~25–35 mg/L
Sodium: Low
Lead (at source): <1 µg/L (no lead added at treatment)
THMs: Well below provincial limits

All regulated parameters met Ontario Drinking Water Quality Standards.

Lead Service Lines & Older Plumbing

Treated water contains no lead. Older and historic homes in Kingston may have lead service lines or pre-1990 solder. The City of Kingston participates in lead sampling programs. Free testing is available.