Programs - Environment and Lake Stewardship - Lake Partner Program

Lake Partner

FOCA has partnered for many years with the Ministry of the Environment on volunteer water-quality monitoring programs.

The goal of the Lake Partner Program is to better understand and protect the quality of Ontario's inland lakes by involving citizens in a volunteer-based water quality monitoring program.

The Lake Partner Program is a province-wide, volunteer-based, water-quality monitoring program. Volunteers collect total phosphorus samples and make monthly water clarity observations on their lakes. This information will allow the early detection of changes in the nutrient status and/or the water clarity of the lake due to the impacts of shoreline development, climate change and other stresses.

Volunteer involvement requires the collection of one water sample for total phosphorus in May for lakes on the Canadian Shield and one sample each month (May-Oct) for lakes that are off the shield. These samples are returned postage paid to the Dorset Environmental Science Centre for analysis. In addition, volunteers are asked to make a minimum of 6 (monthly) water clarity observations using a Secchi disk. These observations are mailed to Dorset at the end of the summer.

For more information email the FOCA office at programs@foca.on.ca or contact the Ministry of the Environment, Lake Partner Program at:

Dorset Environmental Science Centre
P.O. Box 39
1026 Bellwood Acres Rd.
Dorset, ON
P0A 1E0

Tel (Toll Free - Ontario Only):
1-800-470-8322

Tel (Outside Ontario):
1-705-766-1294

Fax: 705-766-2254
E-mail: lakepartner@ene.gov.on.ca

or visit their website at http://www.ene.gov.on.ca/envision/water/lake_partner/ 

About the Dorset Environmental Science Centre (DESC)

The DESC began its scientific activities in 1975. Since then, the centre has grown in size and scope and investigates a wide variety of water issues. The study area is comprised of a collection of lake basins in south-central Ontario that have varying amounts of cottage development. The centre’s primary focus is on integrated environmental monitoring, experimentation and data recording. 
DESC is the home of the Lake Partner Program.



Lake Partner Program

Lake Partner Program

November 2011: the Lake Partner Program receives the NALMS Technical Excellence Award! Read the news release and an update about program funding...


Lakeshore Capacity Assessment fact sheet


Lakeshore Capacity Assessment Handbook: Protecting Water Quality in Inland Lakes on Ontario’s Precambrian Shield 


2010 Test Results:

2010 Total Phosphorus Data

2010 Water Clarity (Secchi Disc) Data


Related Information:

What are Algae? fact sheet

Blue Green Algae fact sheet for cottagers

2009-10 Guide to Eating Ontario Sport Fish

Lake Partner Program Support Information:

Sampling Instructions from MOE

Interpreting Phosphorus and Secchi Readings

High levels of phosphorus can lead to algal blooms and in some cases affect the habitat of cold water fish such as lake trout. By sampling the total phosphorus each year it is possible to detect a change in the nutrient status of your lake. It is important to note that several years of data must be collected to observe the normal, between-year-differences before a trend can be identified.

While total phosphorus concentrations are the best way to describe the nutrient status of your lake, regular Secchi depths can also help to identify changes in water clarity that are not linked to nutrient status (zebra mussels, climate change, etc.).



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