SHIRE of Mundaring's aquatic centres are opening this month for the summer season with parents urged to remain vigilant.
Deputy Shire President Patrick Bertola said while it was a little chilly now, the warm weather would soon set in.
"Bilgoman and Mt Helena Aquatic Centres are extremely popular with people across all age groups," he said.
"The Shire is proud to continue delivering this service so people can cool off in the hot Perth summers."
Cr Bertola said while the pools provided a great day out for children and families, guardians needed to be alert.
"The aquatic centre employees have seen a significant increase in the number of parents and guardians who are glued to their smart phones and not paying attention to children in the water," he said.
"A pool is no place for a phone. We ask all adults to put their phones away and concentrate on the children in their care, especially those under five years. For this age group parents must be in the water with them and ensure children are within arm's reach at all times.
"Both aquatic centres do have life guards, but ultimately children under your care are solely your responsibility."
The Shire's aquatic centres open on Saturday 22 October. For more information visit the Shire website at www.mundaring.wa.gov.au