1 Subject content and scope of application

    This standard specifies the standard values and sanitary requirements for the water quality of indoor and outdoor swimming places and the air quality of swimming pools.

    This standard applies to all artificial and natural swimming places.

2 Reference standards

    GB 3097 Sea Water Quality Standard

    TJ 36 Design Sanitary Standard for Industrial Enterprises

3 Standard values and hygiene requirements

3.1 Standard value

3.1.1 Hygienic standard values of water quality for artificial swimming pools (Table 1)

    Table 1 Hygienic standard values of water quality for artificial swimming pools

Item Standard value Item Standard value

Pool water temperature, ℃ 22～26 Free residual chlorine, mg/L 0.3～0.5

pH value 6.8～8.5 Total number of bacteria, each/mL ≤1000

Turbidity, degree ≤5 coliform group, pieces/L ≤18

Urea, mg/L ≤3.5 Toxic substances According to TJ 36 Table 3

3.1.2 Water quality sanitation standard values of natural swimming pools (Table 2)

    Table 2 Water quality sanitation standard values of natural swimming pools

Item Standard value Item Standard value

pH 6.0～9.0 Floating matter No oil film and no floating matter

Transparency, cm ≥ 30 Toxic substances According to TJ36 Table 3 or GB3079

3.1.3 Air sanitation standard values for swimming pools (Table 3)

    Table 3 Air hygiene standard values of swimming pools

Item Standard value Item Standard value

Room temperature in winter, ℃ higher than water temperature 1～2 Air bacteria count

Relative humidity,% ≤ 80 a. Impact method, cfu/m3 ≤ 4000

Wind speed, m/s ≤ 0.5 b. Settlement method, pieces/pan ≤ 40

Carbon dioxide,% ≤ 0.15

3.2 Regular hygiene requirements

3.2.1 The passages and sanitary facilities of swimming places should be kept clean and odor-free and should be disinfected regularly.

3.2.2 To prevent the growth of algae in artificial swimming pools, add 0.25 to 0.5 mg/L copper sulfate to the pool water. The maximum dosage when algae is found should not exceed 1.0mg/L.

3.2.3 The residual chlorine content of the foot-soaking disinfection pool water should be maintained at 5-10mg/L and must be replaced every 4 hours. The concentration of residual chlorine in the new water continuously supplied by the children's wading pool should be maintained at 0.3-0.5mg/L.

3.2.4 The artificial swimming pool should be supplemented with new water regularly every day during the opening hours to ensure that the water quality of the pool has a good sanitary condition.

3.2.5 Patients suffering from hepatitis, heart disease, skin rash (including athlete's foot), severe trachoma, acute conjunctivitis, otitis media, intestinal infectious diseases, mental illness, etc. and alcoholics are strictly prohibited from entering the artificial swimming pool to swim.

3.2.6 It is prohibited to rent out swimming suits.

3.3 Design hygiene requirements

3.3.1 The newly-built swimming pool must be combined with the city's long-term planning. The site should be located far away from the industrial pollution source, and it should also avoid the swimming pool's interference to the surroundings.

3.3.2 Newly built, rebuilt and expanded swimming pools must have circulating water purification and disinfection equipment, and protective measures should be taken when hydrogen disinfection is used.

3.3.3 The walls and bottom of the swimming pool should be clean, water-proof, and light-colored. The walkway outside the pool is not slippery and easy to scour. There is a drainage ditch on the outer edge of the walkway, and the sewage is discharged into the sewer.

3.3.4 The daylighting factor of the indoor swimming pool is not less than 1/4, and the water surface illumination is not less than 80lx.

3.3.5 Swimming places should be divided into men's and women's changing rooms, shower rooms, toilets, etc. There is one shower head for every 30-40 people in the shower room. There is one urinal for every 40 people in women’s toilets, one urinal and two urinals for every 60 men’s toilets. Its sewage is discharged into the sewer.

3.3.6 In the middle of the walkway leading to the swimming pool, there shall be a compulsory foot-dipping disinfection pool (the length of the pool is not less than 2m, the width should be the same as the walkway, and the depth is 20cm).

3.3.7 When a children's wading pool is set in an artificial swimming pool, it should not be connected to an adult swimming pool, and there should be a continuous water supply system.

3.3.8 When a natural swimming pool is opened, its water quality shall meet the requirements of 3.1.2 of this standard, and a sanitary protection zone shall be provided.

3.3.9 There should be no obstacles or pollution sources such as branches, stumps, reefs, etc. at the bottom of the natural swimming pool. The water flow speed is not more than 0.5m/s.

3.3.10 It is strictly forbidden to design and open swimming places in areas with schistosomiasis disease or areas with latent snails.

4 Monitoring and inspection methods

    The monitoring methods of this standard shall be implemented in accordance with the "Public Place Sanitary Standards Monitoring and Inspection Methods".