As long as it is normal, it doesn't matter. You can judge its water quality by looking at the following four parts.

Clean or not:

The water in the swimming pool must be crystal clear: the turbidity of the swimming pool proves that the content of bacteria and organic matter in the water is high, which is easy to induce infection or other health risks. In addition, once a danger occurs, the turbid water in the swimming pool also increases the difficulty for lifeguards to find the danger and carry out rescue.

See if the Ph value of swimming pool water is appropriate: the best pH value of swimming pool water is between 7.2 and 7.8 (test paper can be bought online). When swimming, measure it with pH test paper, and its pH value will be clear at a glance.

See the test report: whether the water quality test report and self-inspection results are fully publicized. Through the electronic bulletin board or text bulletin board of the swimming pool, check the water temperature, residual chlorine concentration, ph value and other indicators of the swimming pool on that day, and see if there is a recent air and water quality qualified test report in the swimming pool that meets the hygiene standards.

Smell: Swimming pool operators in gymnasiums should put an appropriate amount of chlorine-containing disinfectant in the swimming pool water to disinfect the water quality and prevent the spread of diseases. If swimmers find that the smell in the water is strong and suffocating, it is best not to swim in the water first.

Gym is a public place. In order to keep the water quality of the swimming pool clean, a certain dose of chlorine-containing disinfectant is usually added to the swimming pool of the gym while circulating and filtering the pool water, thus producing free residual chlorine. If the residual chlorine content is low, the pool water can not be disinfected in time and effectively, which is easy to breed bacteria and other microorganisms and threaten the health of swimmers. However, if the residual chlorine content is too high, it will stimulate human skin and mucosa, and it will also corrode human skin and mucosa. Especially for children, the elderly and other sensitive people, long-term exposure to the environment with excessive residual chlorine content is likely to cause allergic conjunctivitis and other diseases.