Quote:
Originally Posted by CanSpice
Salt water is denser than fresh water. Because of this, the fresh water from the Fraser "floats" over the salt water from the ocean, forming what's known as a "salt wedge" that penetrates up to Annacis Island on occasion. That's why irrigation water for Delta farms can be taken from the Fraser at 80th Street -- even though the salt wedge exists there the intake is high enough that it's bringing in fresh water.
The water in the Fraser is full of silt, which is why it's not suitable as a potable water source.
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The original plan was to take from the aquifer the same as langley. The water in Cap also used to have silt issues before they built Seymour water treatment plant. It was only in the last 10 years that all of the potable water has been treated. As big area of south surrey langley took from wells and never treated. The issue was when white rock forgot to clean the tops of the storage tanks. heavy rain cause bird waste to flow into the tank. This caused them all to upgrade to primary water treatment plants.