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Bay of Quinte Remedial Action Plan :: Healthy Bay, Healthy Community

Beneficial Use Impairment #8

BUI #8 - Eutrophication and undesirable algae

Status - Impaired One of the main environmental issues with the Bay has always been the amount of nutrients entering it, particularly phosphorus.  Phosphorus is a naturally-occurring element, essential to all life. In just the right amount, it’s a beneficial, life-giving nutrient for rivers, lakes, bays, and streams.  On the other hand, too much phosphorus plays havoc with nature.     

ln aquatic ecosystems like the Bay of Quinte, the ability of phosphorus to promote rapid growth causes problems. It takes only 1 lb. of phosphorus to grow 500 lbs of algae. 
This nutrient-enrichment process is known as eutrophication, and it’s a classic example of too much of a good thing.      

The BQRAP has reduced the amount of phosphorus entering the Bay from multiple sources, both rural and urban, such as sewage treatment plants, stormwater run-off, and agricultural land practices.
With the reduction in phosphorus levels, water clarity has improved due to reduced algae. Making the Bay one of the most picturesque spots in Lake Ontario.   
Underwater plants have re-grown providing fish with habitat, helping to increase the varieties of fish in the Bay.      

Despite the reductions in phosphorus inputs, the current phosphorus levels are still a major concern. 
A Phosphorus Management Strategy is being developed to outline best practices for dealing with phosphorus issues in the future.    

Criteria and supporting evidence

1. Target: Demonstrate a 25 percent reduction in total phosphorus (TP) in the upper Bay of Quinte. 

Measure: Reduce the average concentration of TP from 40 μg /L to 30 μg /L in the upper Bay of Quinte for the period of May to October.

2. Target: Associated with the Bay of Quinte RAP phosphorus reduction targets for the Upper Bay of Quinte, demonstrate a reduction in chlorophyll a levels in the upper Bay.

Measure: Reduce the chlorophyll a concentrations so that they are about 12ug/Lin the upper Bay for the growing season with out the presence of zebra mussels (with zebra mussels, a further 2 - 3 ug/L chlorophyll a reduction should be anticipated).

3. Target: Demonstrate a 40 percent reduction in algae biomass in the Upper Bay of Quinte. 

Measure: Reduce the total phytoplankton biomass from the average pre-1990 density of 7.0-8.0 g/m3 to 4.0-5.0 g/m3 for the May to October time period.


Recent News & Event

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BQRAP June 2019 newsletter This newsletter covers: Swimmable, Fishable, and Drinkable, water levels and Osprey

Lake Ontario/Bay of Quinte Water Levels Fact Sheet.

Septic Stewardship Program... More Info  Find out if you are eligible for a free septic tank pump out and up to 80% cost sharing for minor repairs.

Healthy Soils Check-up Program - Farmers you could be eligible for FREE soil testing. More Info...

Landowner Stewardship Programs - Check out all the funding programs Here.....


Annual Report 2017

A Summer of Science on the Bay. Follow as we highlight our partner agencies' summer monitoring.

1. Quinte Conservation

2. Environment and Climate Change Canada (EC)

3. Coastal Wetland Monitoring

4. EC and Canadian Centre for Inland Waters

5. Fisheries and Oceans Canada

6. Ministry of Natural Resources and Forestry

Blue-Green Algae ...  More Info

Water Soldier - Find out about the impacts of this invasive plant on the Bay of Quinte 

Federal funding for Bay of Quinte - Environment Canada announces funding for 5 restoration and protection projects for Bay of Quinte.

Project Quinte 2017 Report
A multi-agency research and monitoring program for the Bay of Quinte

Ministry of Natural Resources and Forestry

Lake Sturgeon research project


Ontario's Great Lakes Strategy - More here

Great Lakes Protection Act Here

Quinte Area Bird Report The Quinte Area Bird Report is updated weekly. Read more....