In accordance with Province of Ontario standards, samples are taken at five different spots at a beach, and the geometric mean of those five samples is computed. The Province considers that a geometric mean of 100 or less for the day's five samples is acceptable.
Note: The geometic mean (the nth root of the product of n values) minimizes the effect of large values that are present in the data. One of the international Blue Flag beach criteria is that no more than 20% of the samples may be above 100.
Note: Camp Kintail and Bogies Beach are not public beaches. HCHU has historically sampled Bogies Beach so that it can compare its data to the samples taken by the Provincial Park.
Amberley Beach 
Ashfield Park 
Camp Kintail 
Port Albert 
Bogies Beach 
Sunset Beach 


days/samples  19/95  25/125  19/95  21/105  14/70  16/80 
minimum, all samples  10  10  10  10  10  10 
geo.mean of daily geo.means  77  40  89  52  25  27 
geo.mean of daily maximums  115  73  126  83  44  41 
average, all samples  412  96  271  107  55  56 
maximum, all samples  6400  830  1800  500  470  330 
Blue Flag % of samples >100  44%  31%  46%  42%  10%  4% 