An Arizona family is in mourning after a toddler fell into a filthy pool and died. 

During a family function, the 14-month-old fell into the pool, which was not enclosed by a fence. 

According to KTTV, witnesses said they had no idea he'd even gone in because the water was so filthy. They also did not know how long he had been under. 

A relative pulled him out and performed CPR before first responders arrived.

"You never actually think it's going to happen next door to you," a neighbor told AZFamily.

He was taken to a nearby Phoenix-area hospital, where he later died. 

Fire officials said the incident serves as a reminder to keep your pool clean outside of summer.

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