We test private water supplies to check for:
- bacteria
- chemicals
- metals
Testing frequency depends on the type of supply. Risk assessments are usually done every five years.
If your water fails a test:
- you’ll be told what went wrong
- you may need to boil water or stop using it
- you’ll get advice on how to fix the issue
- you may receive a legal notice to make improvements
Improvement notices
If your supply is unsafe, we will issue a notice explaining:
- why the water is unsafe
- what actions are needed
- how long you have to fix it
We will work with you and offer advice to help you meet the necessary standards.
You have the right to appeal for up to 28 days from the date the notice was served.
Treatment and maintenance
To keep your supply safe and reduce health risks:
- protect your water source from animals and waste
- use UV disinfection to kill bacteria
- use filters to remove particles and metals
- correct low pH to prevent corrosion and metal leaching
- install and maintain treatment systems
- clean tanks and pipes regularly
- keep records of maintenance and servicing
Filter types and UV disinfection
There are three types of filters:
- Cartridge filters: Remove particles; must be sized correctly and replaced regularly
- Media filters: Used for high sediment or iron/manganese; require backwashing
- Neutralising filters: Raise pH using alkaline media; media must be monitored and replaced
UV disinfection kills bacteria and viruses without affecting taste. You will need to:
- use pre-treatment (for example 5 micron filter)
- make sure it is switched on at all times
- clean the quartz sleeve monthly
- replace the lamp annually
- include any UV failure response in your Drinking Water Safety Plan (DWSP)
Drinking Water Safety Plan (DWSP)
A DWSP outlines:
- your supply layout
- maintenance responsibilities
- emergency actions
- alternative water sources
We can help you create one at no extra cost.