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Lake Huron Map
Lake Huron Map
Elgin Area Map
Elgin Area Map
Water Conservation Tips:

In the Bathroom - Turn off the water tap while brushing your teeth.  Fill a cup with water for rinsing after brushing.  
More Water Conservation Tips

Water Education

The Lake Huron and Elgin Water Treatment Facilities start with untreated lake water and produce safe and pleasant drinking water, also known as potable water. The treated water is free of disease causing organisms, toxic substances, and objectionable tastes and odours.

This is how it works ...
Click here to download printable PDF version.

1) Water Intakes

Untreated water flows into intake cribs and through intake pipes as far as 2 km offshore. The intake cribs are equipped with a chlorine solution, diffused for Zebra Mussel control.

2) Intake Screens

Mechanically cleaned traveling screens remove large objects and debris, such as leaves, sticks, and occasionally fish from the raw water.

3) Pre-chlorination

Chlorine is added to the raw water to kill most disease causing micro-organisms and help control taste and odour causing substances.

4) Flash Mixing

Alum is added to fast-stirring flash mixers which cause very fine particles (such as silt), that would not readily settle out of the water, to clump together into larger particles called floc.

5) Coagulation-Flocculation

The flocculation basin gently agitates the water to concentrate the suspended solids in an efficient manner. Additional chemicals may be added to the flocculation process either upstream of the flash mixers or as a part of the coagulation-flocculation process, including: powdered activated carbon (for taste and odour control); polymers (as coagulant aids); caustic soda (for pH adjustment); or chlorine (for disinfection).

6) Sedimentation

In the settling tanks, the speed of the flowing water is slowed down so that the larger suspended particles can settle out by gravity and collect on the tank bottom. The clean water on the surface then spills over the top of the tank, on-route to the filters.

7) Filtration

Filtration is the final step in removing the particulate matter. Layers of gravel, sand, and anthracite filter out the remaining suspended particles, including fine pieces of floc, algae, silt, and other impurities. When a filter accumulates too many solids it is taken out of service and backwashed.

8) Post-chlorination

Chlorine is added to the water to kill any remaining disease causing organisms and to sustain a chlorine residual in the water as it makes its way through the distribution system.

9) Fluoridation

At the Elgin Water Treatment Facility, fluoride is added to help prevent cavities.

10) Clear Well

With the treatment process complete, the purified water collects in a clear well below the filters and is stored before being discharged into the distribution system.

11) Distribution

High lift pumps distribute the treated water through transmission mains to reservoirs, pumping stations, and consumers. Throughout the system, water is tested regularly to ensure high quality.

 
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