water supplies

Baffled over the purpose of new water and watershed bylaw

Baffled over the purpose of new water and watershed bylaw

On Oct. 20, 2018 the citizens of the Cowichan Valley voted for establishing the Drinking Water and Watershed Protection Service Establishment Bylaw (#4202). We thought that this bylaw would be used to protect our water supplies. It has been known for many years that the wells at three commercial establishments on Fisher Road, Cobble Hill had nitrate levels greatly exceeding the Health Canada Drinking Water Guidelines. These wells and surrounding CVRD monitoring wells have been monitored by a number of agencies, including the CVRD, in the past. The Cobble Hill Aquifer Interagency Task Group (CHAITG) was established to deal with this nitrate contamination and this Task Group commissioned Western Water Associates Ltd. (WWAL) to carry out a review of past studies. Surprisingly, this review did not review aquifer nitrite levels, only nitrate levels. Nitrite is a bigger concern than nitrate since nitrite can convert the oxygen-carrying hemoglobin to methemoglobin which does not carry oxygen. Thus, nitrite can cause tissue oxygen deficiency which is particularly problematical for infants and children since it can stunt their mental and physical growth.