Water Quality and The Environment of Mary Lake
Water quality is one of the big draws to our Mary Lake Paradise. Vigilant attention to monitoring programs and asking questions when unusual conditions or biological activity occurs is our common responsibility.
Flooding and Flood Plain Mapping
See the Flood Maps of Mary Lake here
Aerial Photos of Muskokaback to 1969
Interactive map of the topography of Mary Lake bottom
Dr Peter Sale’s Presentation On Global Warming in Muskoka
2019 View the Presentation Slides
- This summer a number of you have reported a green stringy slime around parts of our shoreline even when the water has been so cold this summer. One expert has suggested our algae is cladophora. We are asking the experts for more information and will let you know what they tell us.
Information on Lake Monitoring Programs
Our benthic (bugs in the mud) counting and identifying nearshore creatures provides us with an excellent early warning of threats to our water quality. Each year a survey is done.
- Benthic Monitoring 2016 results 1
- Benthic Monitoring 2016 results 2
- Benthic Monitoring 2016 results 3
- Thank you to volunteers
- Benthic Monitoring
- Feedback Form
- Volunteer Acknowledgement
Fish in the Lake
Jane Earthy’s MNR Report
- Muskoka Watershed Report Mary Lake 2018
- Muskoka Watershed Report 2018
- Muskoka Watershed Report 2017
- Lake System Health Water Quality Monitoring Program 2015
- Muskoka Watershed Report on Mary Lake 2014
- Muskoka Watershed Year End Report 2013
- Muskoka Watershed Data Report 2013
- Muskoka Watershed Year End Report 2012
- Muskoka Watershed Data Report 2012
- Muskoka Watershed Year End Report 2011
- Muskoka Watershed Data Report 2011
- Muskoka Watershed Report Card 2010
- Water Web 2009 Report
- Water Web 2008 Report
Muskoka Resorts and Tourism Recommendations
UOW Lake Studies
Recommendations from the freshwater summit 2010
2018 -2019 Environmental Studies
- The full version of the Board’s study of Lake Pollution resulting from Spills at the Town’s Plants
- Map showing the location of the two plants
- The full version of the Boards study of Lake Pollution resulting from Golf Courses
- The full version of the Board’s study of Lake Pollution resulting from Algae
- The full version of the Board’s study of Lake Pollution resulting from Rainstorms
- The full version of the Board’s study of Lake Pollution resulting from Community Growth
Lake Data/Lake Partner Program
- (Jane Earthy Program) gives you all our Mary Lake Secchi (clarity) results and our Total Phosphorus readings for nutrient loading. We have been participating since 2002
by collecting a water sample for total phosphorus after the spring freshet in May and sending it to Dorset. Every few weeks during the summer we drop a Secchi disc down into the water over the deep basin north of Crown Island and measure when it disappears to get our clarity readings.
- Lake System Health/Monitoring Your Lake/EMAN/Ice watch is where our full-year resident volunteers will register Mary Lake to track when the ice comes on and off the lake. They have data back to 1987
Lake System Health/Monitoring Your Lake/Terrestrial Plot Monitoring will be the place
we reestablish our 20m by 20m plot of forest on top of Rocky Island that was first measured
in 2003. Unfortunately, a wind event in September 2006 took out the north side and we need professional expertise to set it up again.
- Well Aware and drinking water testing.
You heard from “Well Aware” at our AGM and in the
past we have had Jim Steele of Jim’s Pump Shop speak to us about up to date UV
lights filter systems reminding us of the importance of regular sampling through the public
health testing service that should be done until you get three perfect 0 coliform and 0 e-coli results each summer.
promotes natural shoreline buffers, septic care & maintenance.FOCA supplies materials
to educate us and our neighbours about best practices around the water. Some of our members have
signed up for private site visits with a bio-technician. Lake-friendly products are encouraged and we are constantly reminding ourselves of our stewardship responsibility to avoid phosphates, fertilizers and to follow the “GO WILD” philosophy.
This year we welcome the aid of our new directors to attend as many meetings, lectures and workshops
as we can to keep up to date on what makes a merrier Mary. Please set aside some time to use the
water web to learn as much as you can about how we can all be better lake stewards in our local paradise.
- Canada Geese
- There is serious concern about goose droppings on the Port Sydney Beach as well as along cottage shorelines. Your association is working on strategies to control this. The best strategy, since geese like grass, is to leave your shoreline in a natural state. Watch for more information at the AGM.