Velora Water: Gravenhurst Ontario Water Quality Overview

Gravenhurst Ontario Drinking Water Quality Overview – 2025

Gravenhurst receives its municipal drinking water primarily from local lake sources within the District of Muskoka, treated at the Town’s water facilities. The water meets all provincial standards with strong compliance. While safe, many Gravenhurst homeowners and cottage owners install premium filtration to improve taste, reduce hardness, and address potential issues from older plumbing or lake-sourced water.

Quick Facts

100% Regulatory Compliance in 2025
Local Lakes Primary Source
~14,000+ Gravenhurst Residents Served
~80–140 mg/L Typical Hardness

Water Source & Treatment

Source: Local lake sources within the Gravenhurst area, treated at the Town of Gravenhurst water treatment facilities. The town maintains its distribution system.

The Town of Gravenhurst operates its own water treatment and distribution system serving the community and surrounding areas within Muskoka.

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

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

Aerial view of Gravenhurst, Ontario looking over the town centre, Lake Muskoka waterfront, and surrounding residential neighbourhoods – 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 Gravenhurst 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 homes and cottages in Gravenhurst may have lead service lines or pre-1990 solder. Local lead sampling programs are available. Free testing can be arranged.