Singapore legislation
Schedule 2
of Environmental Public Health (Licensable Aquatic Facilities) Regulations 2021
Schedule 2
Parameter limits for water in licensable aquatic facilities
SECOND SCHEDULERegulations 5 and 6Parameter limits for water in licensable aquatic facilitiesPart 1water in MULTI‑USE SPA POOLFirst column Second column Third columnParameter Parameter limit Minimum testing frequency1.pH value (a)where the water is disinfected with a bromine‑based disinfectant, the pH value must not be less than 7.2 and must not exceed 8.0; and
where the water is disinfected with a chlorine‑based disinfectant, the pH value must not be less than 7.2 and must not exceed 7.8 Once a month2.Residual disinfectant (a)where the water is disinfected with a bromine‑based disinfectant, the amount of total bromine must not be less than 4 parts per million and must not exceed 6 parts per million; and
where the water is disinfected with a chlorine‑based disinfectant, the amount of free chlorine must not be less than 3 parts per million and must not exceed 5 parts per million Once a month3.Escherichia Coli Count Must be less than 1 colony forming unit per 100 millilitres Once a month4.Heterotrophic Plate Count (HPC) at 48h, 35ºC Must not exceed 200 colony forming units per millilitre Once a month5.Pseudomonas aeruginosa Count Must be less than 10 colony forming units per 100 millilitres Once every 3 months Part 2water in swimming poolFirst column Second column Third columnParameter Parameter limit Minimum testing frequency1.pH value (a)where the water is disinfected with a bromine‑based disinfectant, the pH value must not be less than 7.2 and must not exceed 8.0; and
where the water is disinfected with a chlorine‑based disinfectant, the pH value must not be less than 7.2 and must not exceed 7.8 Once a month2.Residual disinfectant (a)where the water is disinfected with a bromine‑based disinfectant, the amount of total bromine must not be less than 2 parts per million and must not exceed 4 parts per million; and
where the water is disinfected with a chlorine‑based disinfectant, the amount of free chlorine must not be less than 1 part per million and must not exceed 3 parts per million Once a month3.Escherichia Coli Count Must be less than 1 colony forming unit per 100 millilitres Once a month4.Heterotrophic Plate Count (HPC) at 48h, 35ºC Must not exceed 200 colony forming units per millilitre Once a month5.Turbidity Must not exceed 0.5 Nephelometric Turbidity Units Once a monthPart 3water in WATER PLAYGROUNDFirst column Second column Third columnParameter Parameter limit Minimum testing frequency1.pH value (a)where the water is disinfected with a bromine‑based disinfectant, the pH value must not be less than 7.2 and must not exceed 8.0; and
where the water is disinfected with a chlorine‑based disinfectant, the pH value must not be less than 7.2 and must not exceed 7.8 Once a month2.Residual disinfectant (a)where the water is disinfected with a bromine‑based disinfectant, the amount of total bromine must not be less than 2 parts per million and must not exceed 4 parts per million; and
where the water is disinfected with a chlorine‑based disinfectant, the amount of free chlorine must not be less than 1 part per million and must not exceed 3 parts per million Once a month3.Escherichia Coli Count Must be less than 1 colony forming unit per 100 millilitres Once a month4.Heterotrophic Plate Count (HPC) at 48h, 35ºC Must not exceed 200 colony forming units per millilitre Once a month5.Pseudomonas aeruginosa Count Must be less than 10 colony forming units per 100 millilitres Once every 3 months 6.Turbidity Must not exceed 0.5 Nephelometric Turbidity Units Once a monthPart 4water in LICENSABLE AQUATIC FACILITY WITH AEROSOL‑GENERATING FEATURESFirst column Second column Third columnParameter Parameter limit Minimum testing frequency1.Legionella Bacteria Count Must be less than 1 colony forming unit per 100 millilitres Once every 3 months