That's why the CDC and others urge pool owners and managers to test chlorine and pH levels all the time — they can change day to day based on pool usage.

The Olympic diving pool in Rio caused a buzz when its water turned an eye-catching green colour earlier this week. Here's a scientific look at the explanations offered by Olympic officials.

Texas weather — especially its extremely heat and dryness, and severe storms — can wreak havoc on your backyard oasis, the private swimming pool.

Extreme weather events in Texas, from excessive heat to severe flooding, can hurt a swimming pool’s water quality, disrupt its balance of chemicals, and lead to significant water loss.