AFC 5.01 WATER QUALITY & TESTING     



DEPARTMENT OF HEALTH - AQUATIC FACILITY CODE OF PRACTICE

Application
The Requirements of this Part apply to all facilities.

Chemical Water Standards
The water chemistry shall be maintained in accordance with the requirements of Table 6.

 
Free Chlorine Levels

 

Table 6 – Minimum Free Chlorine Levels

 

 

Minimum Free Chlorine Levels – milligrams per litre

 

Water Temperature

less than 26 0C.

Water Temperature

Greater than 26 0C.

Unstabilised pools – cyanuric acid not used.

1.0

2.0

Stabilised pools – where cyanuric acid is used

2.0

3.0

 

Minimum Free Chlorine Levels – milligrams per litre

Spa and hydrotherapy pools

3.0

Wading pools

4.0

As an alternative to complying with this requirement, indoor facilities may comply with the free bromine levels specified in 5.1.4 Free Bromine Levels of this Section.

Combined Chlorine Levels
It is recommended that facilities be operated with combined chlorine levels no greater than 30% of the Free Chlorine Levels.


Maximum Chlorine Levels
Total chlorine levels shall be no greater than 10 milligrams per litre whilst a facility is in use.

 
Free Bromine Levels
Facilities electing to use bromine sanitisers shall ensure the water complies with the requirements of Table 7.

 

Table 7 – Minimum Free Bromine Levels

 

 

Minimum Free Bromine Levels

(milligrams per litre)

Type of Facility

Water Temperature

Less than 26 0C.

Water Temperature

Greater than 26 0C.

Swimming Pools, Wave Pools, Water Slide Receiving Pools

2.0

4.0

Hydrotherapy Pools, Spa Pools and Wading Pools

4.0

6.0

Facilities using bromine as a sanitiser shall keep the DMH levels no greater than 200 milligrams per litre.

pH
The pH shall be maintained within the range 7.2 – 7.8

Cyanuric Acid
Where cyanuric acid is used, it is to be maintained at a level of 30 – 50 milligrams per litre.

Alkalinity
The alkalinity shall be maintained within the range 60 – 200 milligrams per litre.

Calcium Hardness
The calcium hardness shall be maintained within the range 50-400 milligrams per litre.

Total Dissolved Solids
It is recommended that the Total Dissolved Solids (TDS) level be maintained at no more than 1000 milligrams per litre above the TDS level of the supply water, to an absolute maximum of 3000 milligrams per litre.

Facilities using salt water chlorination units shall maintain the TDS level in the range specified by the chlorination unit manufacturers.

Water Balance
It is recommended that operators ensure water is balanced in accordance with the Langlier Saturation Index, Taylor Index or other appropriate saturation index.  

 

PHYSICAL WATER STANDARDS
Aquatic facility water needs to be maintained to appropriate physical standards, to provide patrons with a comfortable and safe environment, and to ensure the disinfection process works efficiently.


Water Clarity

Aquatic facility water shall be kept clean and clear.

The water shall be maintained to a level of clarity that will allow a Secchi Disk 150mm in diameter, placed on the bottom of the deepest part of the facility, to be visible when viewed from the concourse at a distance of 9 metres.

Whenever a facility is open for use, the water shall have sufficient clarity to enable lifeguards to see a submerged patron on the bottom of the water body.

This requirement shall be applied to measurements conducted on waterslide landing pools without the flume water flow operating.

Maximum Water Temperatures
Aquatic facilities shall not be heated above 38 0C.

MICROBIOLOGICAL WATER STANDARDS
All aquatic facility water shall be maintained in accordance with the microbiological requirements of Table 8.

 

Table 8 – Microbiological Water Standards

Type of Organism

            Maximum Count Allowable

  Heterotrophic Plate Count

100 Colony Forming Units (CFU) per mL.

 Presumptive Total Coliforms

<1 per 100 mL

 Presumptive Pseudomonas spp

(Only applies where water temperature is over 32 0C)

<1 per 100 mL

Thermophilic Amoebae

Not Detected

Thermophilic Naegleria

Not Detected


All make-up water used in aquatic facilities shall also comply with this requirement.

Chemical Water Testing
Whenever an aquatic facility is open for use, the water chemistry shall be manually tested on a regular basis.


The water testing shall include measurement of the following parameters:

 

·           Free chlorine / Free bromine

·           pH

 The testing shall be performed in accordance with the following minimum frequencies:

 

·        Group Four Facilities:                                                At least once per day


All facilities using isocyanuric acid shall perform water tests to measure the concentration of the chemical, at least once per week.

Results of all water testing and maintenance procedures shall be recorded, and records kept by the facility for at least two years.  The occupier of a facility shall produce the records for examination at the request of an Environmental Health Officer.

All chemical water tests are to be performed using water testing kits approved by the Executive Director Public Health.  Approved testing kits are listed below:

 

·        Palintest Comparators;

·        Palintest Photometers;

·        Lovibond Comparators;

·        Lovibond Photometers.

Test kit reagents shall be stored in accordance with manufacturers’ directions, and discarded upon reaching their expiry date.

 

Microbiological Water Testing
Environmental health officers shall collect water samples from all aquatic facility water bodies at least once per month, and submit them to a NATA accredited microbiological testing laboratory.


The samples shall be taken by persons holding qualifications approved by the Executive Director Public Health.  The sample transportation method shall comply with any requirements stipulated by the testing laboratory.

Operators shall provide a copy of the testing results to the Local Government.

 

Off-Season Periods - Water Quality Maintenance
During the off-season, whilst an aquatic facility is not in use, operators shall ensure water clarity is maintained and algal growth prevented.

Signage must be displayed at all entry points into aquatic facilities, clearly stating that the facility is closed for the winter.

Aquatic facilities shall receive sufficient maintenance to ensure they do not give off objectionable odours, become a breeding ground for insects, or create any other nuisance or safety hazards.

Maintenance of other water quality parameters is not required during the off-season.

At the end of an off-season period, occupiers shall seek approval from the Environmental Health Service of the local government in which the aquatic facility is located, prior to a facility being re-opened for use.

            
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