Emerald Lake

Source Information

Wellington-Dufferin-Guelph Public Health does not monitor recreational water quality at sites in this region. For more information, call 1 800-265-7293. Historical water quality data is available from testing results prior to 2017. Prior to 2018 beaches in Ontario were posted when the geometric mean of 5 samples collected within a 30-day period exceeded 100 E. coli / 100 mL of water. In Swim Guide, a beach is marked Green when the geometric mean of at least 5 samples is below 200 E.coli / 100 mL water and each individual sample concentration is below 400 E.coli / 100mL. A beach is marked Red when the results are equal to or above a geometric mean of 200 E.coli / 100 mL water and/or 400 E.coli / 100 mL. A beach is marked Grey when there are no current results or there is no available information.