The GRCA monitoring network has recorded above average rainfall over the past 30 days, and the watersheds in the Ganaraska Region have recovered to normal conditions as a result. A lack of rainfall in May and early June led to the declaration of a Level 1 Low Water Condition on June 6th, however since the end of June, rainfall has been more consistent with enough scattered thunderstorms to alleviate the dry conditions.
The lack of rainfall this spring caused groundwater levels to drop quickly threatening supplies for those who rely on wells for their water needs. Low soil moisture in fields and gardens began to slow crop growth and increase the demand for irrigation. As the summer heated up, conditions could have become much worse, however with that heat came several rounds of thunderstorms in July. The total rainfall for July is now over 100mm, with several days left in the month, which is enough to bring our watersheds out of the minor drought condition.
Our stream flows were a bit lower than normal to start the summer, but a resilient supply of groundwater from springs in the Oak Ridges Moraine kept streams flowing. Now stream flows are rising again ahead of the fall Salmon run. These fish will move into our watersheds over the next several weeks to spawn. After which, they will die off.
The Conservation Authority will continue to monitor local conditions and provide updates as conditions warrant. For further information, please contact the following GRCA staff at 905-885-8173 during regular business hours or 289-251-1010 or 289-251-2094 (after normal business hours).