(1) Swimming pools when in use, shall be continuously disinfected with a chemical which imparts a residual effect.
(2) When chlorine is used, a chlorine residual of 0.5 p.p.m. or not less than 0.7 p.p.m. chloramine shall be maintained throughout the pool whenever it is open or in use.
(3) If other halogens such as bromine or iodine are in use residuals or equivalent disinfecting strength shall be maintained.
(4) A testing kit for measuring the concentration of the disinfectant accurate to within 0.1 p.p.m. shall be provided at each pool
(5) The medical officer of health may accept other disinfecting methods if he or she is satisfied that they—
(a) provide a residual which is easily measurable;
(b) are as effective as the chlorine concentration required by subregulation (2), and
(c) are not dangerous to the public health.
(6) The pH value of the water in any pool shall be between 7.5 and 8.4 and a pH testing kit accurate to the nearest 0.2 pH unit shall be provided at each swimming pool.