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Water quality reports

Niagara Region operates six water treatment plants serving communities across Niagara. Under Ontario Regulation 170/03, Niagara Region and the area municipalities are responsible for providing water quality reports. 

Water quality and reports by plant

Water quality data is updated monthly. Select a treatment plant to review current water quality readings, and to download annual and summary reports.

Current status

Values represent water quality leaving the treatment plant on the date shown, except pH which is for distribution water. Updated monthly by a Ministry-certified laboratory.

Parameter Value Sample date Range Target in Range
Alkalinity 78 mg/L July 2, 2025 30 - 500 mg/L ✓ Safe and within our expected range
Hardness 101 mg/L July 2, 2025 100 - 150 mg/L ✓ Safe and within our expected range
pH 7.48 Aug. 6, 2025 6.5-8.5 ✓ Safe and within our expected range
E. Coli Not detected July 28, 2025 0 counts/100 mL ✓ Safe and within our expected range
Total Coliforms Not detected July 28, 2025 0 counts/100 mL ✓ Safe and within our expected range
Lead Not detected May 20, 2025 0-0.01 mg/L ✓ Safe and within our expected range
Chloride 21.1 mg/L July 2, 2025 0 - 250 mg/L ✓ Safe and within our expected range
Sodium 13.3 mg/L May 20, 2025 0-20 mg/L ✓ Safe and within our expected range
Sulphate 33.5 mg/L July 2, 2025 0 - 500 mg/L ✓ Safe and within our expected range
Fluoride Not detected July 2, 2025 0 - 1.5 mg/L ✓ Safe and within our expected range
Vinyl Chloride Not detected May 20, 2025 0-0.001 mg/L ✓ Safe and within our expected range
Calcium 27.2 mg/L July 2, 2025 - No current standards or guidelines for this parameter
Magnesium 8.09 mg/L July 2, 2025 - No current standards or guidelines for this parameter

Reports

2025

2024

2023

2022

Current status

Values represent water quality leaving the treatment plant on the date shown, except pH which is for distribution water. Updated monthly by a Ministry-certified laboratory.

Parameter Value Sample date Range Target in Range
Alkalinity 83 mg/L Jan. 5, 2026 30 - 500 mg/L ✓ Safe and within our expected range
Hardness 117 mg/L Jan. 5, 2026 <200 mg/L ✓ Safe and within our expected range
pH 7.43 Feb. 9, 2025 6.5-8.5 ✓ Safe and within our expected range
E. Coli Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Total Coliforms Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Lead Not detected Nov. 5, 2025 0-0.01 mg/L ✓ Safe and within our expected range
Chloride 29.3 mg/L Jan. 5, 2026 0 - 250 mg/L ✓ Safe and within our expected range
Sodium 15.5 mg/L Nov. 5, 2025 0-20 mg/L ✓ Safe and within our expected range
Sulphate 35 mg/L Jan. 5, 2026 0 - 200 mg/L ✓ Safe and within our expected range
Fluoride 0.08 mg/L Jan. 5, 2026 0 - 1.5 mg/L ✓ Safe and within our expected range
Vinyl Chloride Not detected Nov. 5, 2025 0-0.001 mg/L ✓ Safe and within our expected range
Calcium 33.1 mg/L Jan. 5, 2026   No current standards or guidelines for this parameter
Magnesium 8.44 mg/L Jan. 5, 2026   No current standards or guidelines for this parameter

Reports

2025

2024

2023

2022

Current status

Values represent water quality leaving the treatment plant on the date shown, except pH which is for distribution water. Updated monthly by a Ministry-certified laboratory.

Parameter Value Sample date Range Target in Range
Alkalinity 80 mg/L Jan. 5, 2026 30 - 500 mg/L ✓ Safe and within our expected range
Hardness 111 mg/L Jan. 5, 2026 100 - 150 mg/L ✓ Safe and within our expected range
pH 7.46 Feb. 9, 2026 6.5-8.5 ✓ Safe and within our expected range
E. Coli Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Total Coliforms Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Lead Not detected Nov. 3, 2025 0-0.01 mg/L ✓ Safe and within our expected range
Chloride 21.2 mg/L Jan. 5, 2026 0 - 250 mg/L ✓ Safe and within our expected range
Sodium 9.31 mg/L Nov. 3, 2025 0-20 mg/L ✓ Safe and within our expected range
Sulphate 37.6 mg/L Jan. 5, 2026 0 - 500 mg/L ✓ Safe and within our expected range
Fluoride 0.08 mg/L Jan. 5, 2026 0 - 1.5 mg/L ✓ Safe and within our expected range
Vinyl Chloride Not detected Nov. 3, 2025 0-0.001 mg/L ✓ Safe and within our expected range
Calcium 31.3 mg/L Jan. 5, 2026   No current standards or guidelines for this parameter
Magnesium 7.95 mg/L Jan. 5, 2026   No current standards or guidelines for this parameter

Reports

2025

2024

2023

2022

Current status

Values represent water quality leaving the treatment plant on the date shown, except pH which is for distribution water. Updated monthly by a Ministry-certified laboratory.

Parameter Value Sample date Range Target in Range
Alkalinity 92 mg/L Jan. 19, 2026 30 - 500 mg/L ✓ Safe and within our expected range
Hardness 126 mg/L Jan. 19, 2026 100 - 150 mg/L ✓ Safe and within our expected range
pH 7.6 Feb. 9, 2026 6.5-8.5 ✓ Safe and within our expected range
E. Coli Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Total Coliforms Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Lead Not detected Nov. 12, 2025 0-0.01 mg/L ✓ Safe and within our expected range
Chloride 28.1 mg/L Jan. 19,  2026 0 - 250 mg/L ✓ Safe and within our expected range
Sodium 12.1 mg/L Nov. 12, 2025 0-20 mg/L ✓ Safe and within our expected range
Sulphate 33.2 mg/L Jan. 19, 2026 0 - 200 mg/L ✓ Safe and within our expected range
Fluoride 0.05 mg/L Jan. 19, 2025 0 - 1.5 mg/L ✓ Safe and within our expected range
Vinyl Chloride Not detected Nov. 12, 2025 0-0.001 mg/L ✓ Safe and within our expected range
Calcium 36.3 mg/L Jan. 19, 2026   No current standards or guidelines for this parameter
Magnesium 8.62 mg/L Jan. 19, 2026   No current standards or guidelines for this parameter

Reports

2025

2024

2023

2022

Current status

Values represent water quality leaving the treatment plant on the date shown, except pH which is for distribution water. Updated monthly by a Ministry-certified laboratory.

Parameter Value Sample date Range Target in Range
Alkalinity 94 mg/L Jan. 5, 2026 30 - 500 mg/L ✓ Safe and within our expected range
Hardness 122 mg/L Jan. 5, 2026 100 - 150 mg/L ✓ Safe and within our expected range
pH 7.98 Feb. 9, 2026 6.5-8.5 ✓ Safe and within our expected range
E. Coli Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Total Coliforms Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Lead Not detected Nov. 3, 2025 0-0.01 mg/L ✓ Safe and within our expected range
Chloride 22.6 mg/L Jan. 6, 2026 0 - 250 mg/L ✓ Safe and within our expected range
Sodium 13 mg/L Nov. 3, 2025 0-20 mg/L ✓ Safe and within our expected range
Sulphate 35.2 mg/L Jan. 5, 2026 0 - 200 mg/L ✓ Safe and within our expected range
Fluoride 0.07 mg/L Jan. 5, 2026 0 - 1.5 mg/L ✓ Safe and within our expected range
Vinyl Chloride Not detected Nov. 3, 2025 0-0.001 mg/L ✓ Safe and within our expected range
Calcium 34.4 mg/L Jan. 5, 2026   No current standards or guidelines for this parameter
Magnesium 8.73 mg/L Jan. 5, 2026   No current standards or guidelines for this parameter

Reports

2025

2024

2023

2022

Current status

Values represent water quality leaving the treatment plant on the date shown, except pH which is for distribution water. Updated monthly by a Ministry-certified laboratory.

Parameter Value Sample date Range Target in Range
Alkalinity 91 mg/L Jan. 19, 2026 30 - 500 mg/L ✓ Safe and within our expected range
Hardness 130 mg/L Jan. 19, 2026 100 - 150 mg/L ✓ Safe and within our expected range
pH 7.46 Feb. 9, 2026 6.5-8.5 ✓ Safe and within our expected range
E. Coli Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Total Coliforms Not detected Feb. 2, 2026 0 counts/100 mL ✓ Safe and within our expected range
Lead Not detected Nov. 12, 2025 0-0.01 mg/L ✓ Safe and within our expected range
Chloride 28.6 mg/L Jan. 19, 2026 0 - 250 mg/L ✓ Safe and within our expected range
Sodium 12.5 mg/L Nov. 12, 2025 0-20 mg/L ✓ Safe and within our expected range
Sulphate 33.1 mg/L Jan. 19, 2026 0 - 200 mg/L ✓ Safe and within our expected range
Fluoride 0.07 mg/L Jan. 19, 2026 0 - 1.5 mg/L ✓ Safe and within our expected range
Vinyl Chloride Not detected Nov. 12, 2025 0-0.001 mg/L ✓ Safe and within our expected range
Calcium 36.8 mg/L Jan. 19, 2026   No current standards or guidelines for this parameter
Magnesium 9.27 mg/L Jan. 19, 2026   No current standards or guidelines for this parameter

Reports

2025

2024

2023

2022

Water Quality Management System

Niagara Region is committed to providing consumers with high-quality drinking water through a multi-barrier treatment approach and rigorous quality management. To request a copy of the Niagara Region Water Quality Management System Operational Plan, contact Water.

We are committed to:

  • Working to ensure the quality management system is maintained and continually improved
  • Abiding by all relevant legislation and regulations
  • Treating and producing water that is clean and safe
  • Educating the public about the importance of water
  • Respecting Niagara's most precious resource - water

Municipal Drinking Water Licensing Program

Licensing

We hold five municipal drinking water licences for six plants as Decew and Niagara Falls systems are interconnected.

We were among the first municipalities in Ontario to receive these licences and have maintained accreditation since 2009.

Financial planning

Niagara Region is required to maintain a Water Financial Plan to plan for the long-term funding of our drinking water systems.

This is part of the Municipal Drinking Water Licensing Program.

Have a question?

Contact Water