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.
Compared to recent years, the summer of 2007 experienced much less rainfall. Therefore, the runoff from farmland was less, and thus the lower statistics.
Amberley Beach 
Ashfield Park 
Camp Kintail 
Port Albert 
Bogies Beach 
Sunset Beach 


days/samples  24/120  24/120  10/50  23/115  14/70  14/70 
minimum, all samples  10  10  10  10  10  10 
geo.mean of daily geo.means  19  37  47  53  17  15 
geo.mean of daily maximums  25  73  66  88  25  20 
average, all samples  80  135  135  102  34  39 
maximum, all samples  2000  1100  590  470  270  440 
Blue Flag % of samples >100  10%  22%  32%  33%  11%  7% 