Almost half of the pools tested through the summer 2011 Healthy
Pools campaign showed improper water chemistry.
Approximately 1,500 pools were tested and results showed that 47
percent of pools had pH outside the recommended range of 7.2-7.8
and 54 percent had free chlorine values outside the recommended
range of 1-3 parts per million.
The majority of the pools (78 percent) were backyard pools. Testing
was conducted via test kits available for free from the Healthy
Pools campaign, a project of the Centers for Disease Control and
Prevention and the Water Quality and Health Council, an independent
group sponsored by the Chlorine Chemistry Division of the American
Chemistry Council. Funding for test kits was provided through a
donation from the Hach Company. Read more...