Water discolouration can appear harmless at first glance, but depending on the water’s hue, it can signal a cause for concern. The colour of the water could indicate anything, from harmless mineral deposits to potential contamination. Given how essential clean, running water is for daily life, understanding the causes of water discolouration and your next course of action is important.
Whether you’re unsure of the cause or ready to take action, hiring plumbers Dunedin citizens trust should be your next step. With that in mind, here are some of the possible causes of water discolouration and practical steps to address the issue.
Air Bubbles
A common yet harmless cause of water discolouration is the presence of tiny air bubbles. When air becomes trapped in the water supply, it can create a cloudy or milky appearance as it escapes through the tap. This often happens after maintenance work on the mains supply, and fortunately, this type of discolouration is temporary and generally clears up on its own. Running the tap for a few minutes can help release the trapped air, allowing the water to return to its usual clarity. However, if the problem persists, it may be worth contacting your local water provider to check for ongoing works or irregularities in the supply system.
Corroded Pipes
Older plumbing systems are particularly prone to corrosion, and this can directly affect the colour of your water. When metal pipes, especially those made from galvanised steel or cast iron, begin to deteriorate, rust particles can flake off and mix with the water supply, causing the water to have a reddish-brown or orange tint. Aside from affecting appearance, corroded pipes can also alter the taste and odour of your water. Over time, the internal damage may worsen, leading to leaks or reduced water pressure.
If corrosion is suspected, it’s advisable to have a qualified plumber assess the system and replace outdated pipes with modern materials such as copper or PVC. This not only restores water quality but also prevents future contamination.
Changes in Water Flow
Unexpected changes in water flow can sometimes cause temporary discolouration. When water movement through the mains is disrupted, such as after a burst pipe, firefighting activity, or maintenance work, sediment and minerals that normally settle at the bottom of the pipes can become disturbed. As a result, the water may appear brownish, yellow, or even slightly grey for a short period.
Typically, this resolves once the flow stabilises and the particles settle again. Running cold taps for several minutes can help flush the system, but if the discolouration continues or worsens, it’s advisable to contact your local water authority. Consistent communication with them can confirm whether the issue is external or confined to your household plumbing.
Sediment Build-Up in Pipes
If you rely on bore water or live in a region with naturally high mineral content, chances are the reason behind your water discolouration problem is sediment build-up. Particles such as sand, silt, or mineral deposits can gradually collect within your home’s plumbing system, and when they become unsettled, they can cause the water to appear murky or slightly discoloured. Apart from affecting the water’s appearance, the sediments may also leave a faintly gritty texture or unusual taste, making it unpleasant or unsuitable for drinking and cooking.
Should this be the case, regular maintenance, such as flushing taps and cleaning aerators or filters, helps reduce the accumulation of these materials. For a more permanent solution, a whole-house filtration system can prevent debris from entering the pipes in the first place. If the issue continues despite routine upkeep, it may be time for a professional inspection to check for scaling or blockages that require thorough cleaning.
Plumbing Repairs
Water discolouration may also occur following recent plumbing repairs or renovations. Activities like pipe replacement, valve installation, or water main reconnection can dislodge rust, sediment, or mineral deposits that have settled in the pipes. This is usually a temporary effect, but it can cause water to appear cloudy or rusty for several hours after the work is completed.
Flushing taps thoroughly should clear the system, although it’s best to run cold water first to prevent drawing disturbed particles into the water heater. If discolouration continues beyond a day or two, there may be a more persistent source of contamination or a fitting that has not been properly sealed. In this situation, contacting a licensed plumber ensures the system is inspected, cleaned, and restored to normal operation without compromising water safety.
Timely Intervention is Your Best Defence
While water discolouration may not always signal a serious issue, it should never be ignored. The colour change could be caused by anything, from harmless air bubbles to more concerning plumbing issues. As such, knowing what triggers the issue is essential for maintaining the quality and safety of your water supply. It also enables you to make the appropriate decisions to address it effectively and prevent further complications, keeping your home’s water safe, clear, and dependable for years.