According to the CDC, the warm water found in hot tubs can become contaminated if it is not sufficiently cleaned or disinfected. The agency recommends that users ask these questions: What was the most recent health inspection score for the hot tub? Are disinfectant and pH levels checked at least twice per day? Are disinfectant and pH levels checked more often when the hot tub is being used by a lot of people?
Are the following maintenance activities performed regularly: removal of the slime or biofilm layer by cleaning; replacement of the water filter according to manufacturer’s recommendations; replacement of spa water?