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.
|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%|