Supplement Feature - February 2021
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Just Keep Swimming

The 2021 Aquatic Trends Report

By Emily Tipping


Respondents from schools, parks and colleges were the most likely to report that they currently use a form of secondary disinfection at their aquatic facilities. Some 40% of school respondents said they do so, followed by parks (39.3%) and colleges (38.7%). Camp respondents were the least likely to use secondary disinfection—just 9.4% said they do so. (See Figure 14.)

Respondents whose facilities have higher average operating costs are more likely to report that they use secondary disinfection than those with lower costs. Well over half (58.8%) of those whose operating costs average more than $500,000 a year said they currently use secondary disinfection, down slightly from 63.9% in 2019. For those with operating costs between $250,000 and $499,999, 37.5% currently use secondary disinfection, up from 33.9% in 2019. And for those whose costs are less than $250,000 on average, 25% currently use secondary disinfection, down slightly form 25.8% in 2019.

Respondents who have indoor pools only are more than twice as likely to use secondary disinfection than those with outdoor pools only. Some 28.2% of indoor pool respondents said they currently use secondary disinfection, compared with just 10.4% of those with outdoor pools. UV is the most common method used, with 23.6% of indoor pool respondents using this method, compared with 10.4% of those with outdoor pools only.

Looking forward, among those respondents who said they plan to make additions or modifications to their water treatment systems over the next few years, 41.3% are planning to add UV systems (down from 46.7% in 2019). Another 14.7% are planning to add AOP systems (up from 14.3%), and 12% are planning to add ozone (down from 15.2%).

The use of pool automation systems has seen growth over the past few years, as the percentage of respondents who report that they do not use a chemical controller, chemical feed pump or backwash controller has fallen. Some 79.4% of respondents in the current study said they use chemical feed pumps, up from 77% last year. Another 77.8% use chemical controllers (down from 79.9%), and 42% use backwash controllers (up from 40.4%). (See Figure 15.)