Date	Location	mg/L or ppm
September 18, 2008	Pickerel Bay	34.4
	3 Mile Bay	34.1
May 31, 2009	Pickerel Bay	33.5
	Three Mile Bay	33.2
July 9, 2011	Pickerel Bay	31.4
	Three Mile Bay	29.5
May 21, 2012	Pickerel Bay	30.4
	Three Mile Bay	30.5
May 26, 2012	Sunset Bay	31.8

The calcium data presented above was collected by volunteers and processed by the Ontario Lake Partner Program. Details of the LPP can be found at www.desc.ca

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The concentration of calcium is an important parameter to measure in lake waters because it is an indication of the buffering capacity of the lake. The buffering capacity of any body of water refers to its ability to control changes in acidity caused, for example, by acid rain. Lakes with higher calcium levels are more likely to be able to support populations of Zebra mussels, an invasive species. Studies suggest that Zebra mussels are unlikely to become established in waters whose calcium concentration is less that about 20 mg/L, or parts per million. Using this criteria, the calcium levels found in White Lake indicate that this body of water is susceptible to the establishment of this invasive species.

Station	Side ID	Latitude	Longitude	Site Description	Sampling Date	mg/L or ppm
5841	3	451516	763522	Deep Spot, Sunset Bay	June 8, 2014	33.5
5841	4	451516	763320	Deep Spot, N. Hardwood Is.	May 18, 2014	32.8
5841	4	451516	763320	Deep Spot, N. Hardwood Is.	June 14, 2014	33.3
5841	4	451516	763320	Deep Spot, N. Hardwood Is.	July 14, 2014	24.1
5841	5	452105	763045	North End, Deep Spot	June 7, 2014	35.3