Dandenong Water Quality: What’s Actually Coming Out of Your Taps

Who manages your water

Your water is supplied and managed by South East Water. They are the government authority in charge of the water mains and the quality of water across Melbourne,s southern and south-eastern suburbs. If you have concerns about the safety of your water or experience major “brown water” issues due to local works, they are the local authority.

Where your water actually comes from

Dandenong gets most of its water from the Cardinia Reservoir, which stores water collected from the protected catchments of the Yarra Ranges. In 2026, because of the huge number of people moving to the area, this mountain water is often mixed with supply from the Victorian Desalination Plant to ensure the city,s grid remains stable during dry periods. Because the supply is a mix of mountain water and treated seawater, the taste and mineral balance can change throughout the year. Whole-house water filters help to keep the taste consistent no matter where the water is being sourced from that month.

The specific challenge for Dandenong homes

Water in Victoria is naturally soft, usually measuring around 19 mg/L in this region. This means you do not have to worry about the heavy limescale found in other states, but Dandenong residents face two other big problems:

• Construction Sediment: As new apartment blocks and townhouses are joined to the main water lines, dirt and metal grit can get into the pipes. This sediment travels through the network and ends up stuck in your expensive tapware or blocking the filters in your dishwasher and washing machine.
• Chlorine Residuals: To keep water safe as it travels through the expanding local network, South East Water uses chlorine. In newer areas or high-density buildings, residents often notice a strong swimming pool smell in the shower, which can dry out your skin and make drinking water taste like chemicals.