Three-year-old in a "stable condition" after being pulled from backyard pool.

Emergency services were called to a house in Seven Hills in Sydney on Wednesday after a three-year-old boy was found unresponsive in a backyard swimming pool.

The toddler was taken to the Children’s Hospital at Westmead where it’s reported he’s now “in a stable condition”.

As the Blacktown Sun reports, grandmother Irene Ekis told journalists the boy’s mother had left him unattended in the pool for “two seconds” when she went inside to get him an ice block.

The boy was reportedly wearing an inflatable floatie at the time, but it flipped over and trapped him underneath.

“When she came back the floatie was on top of him,” Ekis told reporters outside the home. “There was a lot of screaming. A neighbour was there, who helped.”

The neighbour performed CPR on the boy as they waited for paramedics to arrive. Ambulance services were called to the house around midday this afternoon.

This summer has been devastating for drownings in NSW. According to NSW Royal Life Saving, 22 people have drowned in the state since December, 10. This is the highest number of summer drownings in a decade.

Police report that the three-year-old is currently in a "stable condition", and Blacktown police are investigating the circumstances of the near-drowning.

“It’s terrible,” Ekis told the Blacktown Sun. “I never want my grand-kids to have a pool ever again.”