Water Quality Reports - Welland

The Welland Water Treatment Plant provides water to Welland and a portion of Thorold and Pelham.

Current Status

The values below represent the water quality leaving the water treatment plant on the date indicated with the exception of pH which is for distribution water.

These values are updated on a monthly basis and measured by a laboratory that is certified by the Ministry of Environment, Conservation and Parks.

Parameter	Value	Sample Date	Range	Target in Range
Alkalinity	93 mg/L	May 20, 2026	30 - 500 mg/L	Safe and within our expected range
Hardness	123 mg/L	May 20, 2026	100 - 150 mg/L	Safe and within our expected range
pH	7.45	June 1, 2026	6.5-8.5	Safe and within our expected range
E. Coli	Not detected	May 25, 2026	0 counts/100 mL	Safe and within our expected range
Total Coliforms	Not detected	May 25, 2026	0 counts/100 mL	Safe and within our expected range
Lead	Not detected	Feb. 11, 2026	0 - 0.01 mg/L	Safe and within our expected range
Chloride	25.2 mg/L	May 20, 2026	0 - 250 mg/L	Safe and within our expected range
Sodium	14.1 mg/L	Feb. 11, 2026	0-20 mg/L	Safe and within our expected range
Sulphate	36.8 mg/L	May 20, 2026	0 - 200 mg/L	Safe and within our expected range
Fluoride	0.07 mg/L	May 20, 2026	0 - 1.5 mg/L	Safe and within our expected range
Vinyl Chloride	Not detected	Feb. 11, 2026	0 - 0.001 mg/L	Safe and within our expected range
Calcium	34.4 mg/L	May 20, 2026		No current standards or guidelines for this parameter
Magnesium	8.92 mg/L	May 20, 2026		No current standards or guidelines for this parameter

For more information about the quality of water in your local distribution system, contact your area municipality.

Under Ontario Regulation 170/03 both the Regional Municipality of Niagara and the area municipalities have the responsibility to provide Water Quality Quarterly Reports.

Water Quality Reports - Welland

Current Status

Reports

2025

2024

2023

2022

Water

Water Quality Reports