Water & Sewer

Surface Water Quality Program

The City of Hamilton’s Water Division developed a Surface Water Quality Program (SWQP) that samples surface water locations monthly, throughout the City’s waterways. The purpose of this program is to work with and alongside internal and external Stakeholders to develop and monitor baseline surface water quality conditions. 

Data on the Surface Water Sample Locations is provided through the Open Hamilton Data Portal which is a public-facing resource for up-to-date, easy and transparent data for surface water quality general knowledge, trending, review and research purposes.

Surface Water Sample Locations

The map is updated weekly, providing up-to-date surface water quality data through the Open Hamilton Data Portal. Select any sample location on the map to access the data. Once selected, click the ‘Download’ icon near the top left of the Open Hamilton page to access the full dataset through the ‘Download Options’.   


Map Legend

no overflow  map iconActive Sample Location

no live data map icon

Inactive Sample Location (due to access restrictions)

Select sample location to view additional information.

Surface Water Quality Parameters

The City’s Surface Water Quality Program samples for:

Field Parameters:

  • Conductivity
  • Dissolved Oxygen (DO)
  • pH
  • Temperature

Chemical Parameters:

  • Ammonia as N
  • Carbonaceous Biochemical Oxygen Demand (cBOD)
  • Chloride
  • Escherichia coli (E. coli) bacteria
  • Hardness
  • Nitrate
  • Nitrite
  • O-Phosphate
  • Total Kjeldahl Nitrogen (TKN)
  • Total Phosphorus (TP)
  • Total Suspended Solids (TSS)
  • Un-ionized  Ammonia

Total Metals which include:

  • Aluminum
  • Antimony
  • Arsenic
  • Barium
  • Beryllium
  • Bismuth
  • Boron
  • Cadmium
  • Calcium
  • Chromium
  • Cobalt
  • Copper
  • Iron
  • Lead
  • Lithium
  • Magnesium
  • Manganese
  • Molybdenum
  • Nickel
  • Potassium
  • Selenium
  • Silicon
  • Silver
  • Sodium
  • Strontium
  • Thallium
  • Tin
  • Titanium
  • Tungsten
  • Uranium
  • Vanadium
  • Zinc
  • Zirconium

The data collected is reviewed against municipal, provincial and federal regulations and guidelines for general baseline condition purposes only.  The guiding documents provide water quality benchmarks, in order to monitor and measure water quality improvements, overtime.  

View a detailed table, outlining the water quality parameters and guiding documents (PDF, 176 KB)