Water quality

Every month, Seqwater conducts more than 18,500 laboratory tests to ensure drinking water supplies are safe across South East Queensland. Daily online water quality tests are conducted across the region to ensure the water is safe from catchment to tap.


The state government adds fluoride to Queensland’s water supplies. Fluoride is added to water at the water treatment plants, which are owned and operated by Seqwater, a Queensland Government entity.

Contact 13HEALTH (13 43 25 84) or visit Queensland Health Water Fluoridation or Seqwater to learn more.

Water taste and discolouration

Occasionally, water from the tap may appear dirty or discoloured, or taste differently. Here are the common causes and what to do about them.

Discoloured tap water may be caused by a number of reasons, including a burst pipe in your vicinity or maintenance work being carried out on the water mains. It may also be caused by corrosion of your home’s internal pipes. Most often it is the result of a harmless substance that forms on the inside of the water mains and will not cause illness or any other health concerns.

Redland Water regularly flushes the water mains to ensure that water supplied to your property is of the highest quality. If you notice discoloured water:

  • Flush your plumbing by running the outside tap closest to your water meter for a few minutes until the water runs clear.
  • Avoid using the washing machine or dishwasher while the water remains discoloured.

If the water does not clear within a few minutes, phone Redland City Council on 07 3829 8999.

Chlorine is added to the drinking water supply to maintain disinfection. Sometimes you may be able to taste or smell it.

What to do:

  • Fill a jug, glass or container tap water and let stand overnight.
  • Add freshly squeezed lemon juice to the water.

Occasionally, algae in Seqwater dams can increase to the point where taste may be affected. Seqwater do their best to remove these odours in the treatment process, however, some residents may still notice a faint taste or odour.

If you have above ground plastic pipes on your property, the plastic may break down over time and biofilm start growing on the inside of the pipes. Your plumber will be able to inspect the pipes for you.

What to do:

  • Fill a jug, glass or container tap water and let stand overnight.
  • Add freshly squeezed lemon juice to the water.

Air trapped inside pressurised water pipes converts to tiny air bubbles, which can give water a white or milky appearance. This may be due to:

  • Maintenance or construction of the water main.
  • Shutdown of the water main.

What to do:

  • Fill a jug, glass or container with tap water.
  • Allow it to sit for 10 minutes and it should become clear.

Household plastic pipes laid underground can absorb a petroleum-based hydrocarbon product if spilt or sprayed on the ground near the pipes.

What to do:

  • Please ensure that chemicals and solvents are used and disposed of properly.
  • Dig up and dispose of affected ground near the pipes.

Further information