Protecting Our Watershed
A Watershed Checkup Report

How do we measure watershed health?

There are four primary indicators that we will measure within the Watershed Checkup framework to determine our overall health.  They are forests, wetlands, surface water and groundwater.  CLOCA is responsible for monitoring watershed conditions throughout our jurisdiction, targeting these specific environmental indicators.  Quality and quantity of surface water, groundwater, forest cover and interior forest habitat conditions, riparian and wetland cover will be used to help us assess the health of our watersheds today, and provide a point of reference for future comparisons.  

Forest at Heber  Down Conservation Area.Our Forests  

We know that trees clean our air and water, prevent erosion, reduce flooding and provide important habitat for wildlife.  From our own observations and extensive research by others, the more forested a watershed is, the healthier it will be and the higher the grade. 



Leopard frog hiding in duckweed at a local wetland.Our Wetlands

A wetland is a place where land and water come together.  Wetlands can be a swamp, a marsh, a bog or a fen, deriving this classification from the type of plant life they host. All wetlands whether a treed swamp or a cattail marsh provide us with a host of services like improving water quality, reducing erosion and flooding and providing habitat for terrestrial (land) and aquatic(water) species.


CLOCA staff electroshock a creek secton to inventory fish species.Our Surface Water

As water travels over land, it picks up contaminants like salt and oil from our roadways and fertilizer or pesticide from our lawns.  The aquatic organisms that live within our creeks, ponds and wetlands that receive this polluted water, are sensitive to the resulting changing conditions.  By their presence or absence, they tell us a lot about the quality and health of that water and where we can make improvements.


CLOCA staff taking groundwater sample.Our Groundwater  

Surprise! Not all water travels over land.  A great deal of it is absorbed by the ground trapping rain and snow and releasing it slowly, back into our creeks and wells, cleaning it and contributing to a reduced risk of flooding and erosion.  It acts like a giant reservoir and large pockets of water under the ground are appropriately called aquifers.  But even under the ground, covered by sand, gravel, rock and soil, it can be polluted.  This not only presents huge risks to rural communities that rely on water from their wells for drinking, but that same water eventually makes its way downstream as surface water.  It may end up in a creek where you fish or in Lake Ontario where we get our drinking water.  By monitoring the quality and quantity of groundwater, reducing the risks of contamination through improved human actions, we can ensure a healthier sustainable water supply, now and in the future.

For more information on the Central Lake Ontario Conservation Watershed Checkup, please contact:

Patricia Lowe, BLA, OALA, CSLA
Director, Watershed Stewardship, Community Outreach and Education
100 Whiting Avenue
Oshawa , Ontario L1H 3T3
Tel: 905-579-0411 ext 126  Fax: 905-579-0994                      
Email: plowe@cloca.com