Perth's Drinking Water Supply: Quality Challenges & Solutions
Perth's drinking water system is a marvel of modern engineering that blends three distinct sources to meet the needs of over 2 million residents in one of Australia's driest capital cities. While tap water consistently meets safety standards set by the Australian Drinking Water Guidelines, many Perth homeowners notice distinctive characteristics in their water that affect everything from taste to appliance performance.
As Western Australia's climate continues to evolve, so too does our drinking water supply. Where once we relied primarily on dams filled by winter rainfall, today's Perth water flows from a diversified network of groundwater aquifers, surface water reservoirs, and state-of-the-art desalination plants. Each source brings its own profile of minerals, treatment requirements, and potential quality considerations.
Understanding these unique aspects of Perth's drinking water supply isn't just academic - it directly impacts your everyday life. From the limescale that accumulates in your kettle to the chlorine taste you might notice in your morning cup of tea, these water characteristics affect your home's plumbing infrastructure, appliance lifespan, and even your daily water consumption habits.
Perth's Water Sources
Perth's water supply system stands out as one of Australia's most diversified, drawing from three major sources to ensure reliable access despite our dry climate:
Groundwater (40%)
The Gnangara and Jandakot groundwater systems serve as crucial resources, supplying approximately 40% of Perth's drinking water. These vast underground aquifers act as natural reservoirs, slowly filled by rainfall that percolates through layers of sand and limestone.
The natural filtration process creates water with a distinct mineral profile. Groundwater typically contains higher levels of dissolved minerals, particularly calcium and magnesium, which contribute to water "hardness" – a key concern for many Perth homeowners. This hardness varies seasonally and by location, with northern suburbs often experiencing higher mineral content.
Surface Water (20%)
Perth's network of dams, including the Serpentine, North Dandalup, and Canning reservoirs, contributes approximately 20% of our drinking water. These surface water sources once provided the majority of Perth's supply but have become less reliable as climate change has reduced annual rainfall.
The water from these sources typically contains lower mineral content than groundwater but may show more seasonal variations in quality. After heavy rainfall, increased sediment and organic matter can enter the system, requiring additional treatment.
Desalination (40%)
The Kwinana (Perth Seawater) and Binningup (Southern Seawater) desalination plants represent Perth's climate-independent water source, providing approximately 40% of our drinking water. These facilities use reverse osmosis technology to remove salt and other impurities from seawater, producing high-quality freshwater regardless of rainfall patterns.
Desalinated water typically contains lower levels of minerals and dissolved solids, resulting in "softer" water that produces less scale in household appliances. However, the process removes virtually all minerals, requiring remineralisation before distribution to ensure appropriate taste and to prevent pipe corrosion.
This diverse water source mix creates variations in water quality across Perth, with some areas receiving primarily groundwater and others a blend of all three sources. In many cases, the water at your tap may come from different sources throughout the year as the Water Corporation adjusts supply based on availability, demand, and operational requirements.
Water Treatment Process
Before reaching your tap, Perth's water undergoes a comprehensive treatment process designed to eliminate harmful pathogens, remove particulates, and ensure consistent quality:
Screening and Initial Filtration
Large debris is removed from the source water, particularly important for surface water from dams and reservoirs.
Coagulation and Flocculation
Chemicals called coagulants are added to the water, causing tiny particles to bind together, forming larger particles called "floc" that are easier to remove.
Sedimentation
The heavier floc particles settle to the bottom of large clarification tanks, effectively removing a significant portion of contaminants.
Filtration
The partially clarified water passes through filters designed to remove remaining particles. For desalinated water, reverse osmosis serves as the primary filtration method.
Disinfection (Chlorination)
Chlorine is added to kill or inactivate any remaining pathogens. This residual chlorine is responsible for the distinctive taste and odour that many Perth residents notice in their tap water.
pH Balancing
The water's pH level is adjusted to prevent corrosion of pipes in the distribution system and your home.
Fluoridation
In accordance with the Fluoridation of Public Water Supplies Act 1966, fluoride is added to Perth's water supply at concentrations between 0.7 and 1.0 milligrams per litre.
Throughout this process and after water enters the distribution system, extensive monitoring ensures it meets Australian Drinking Water Guidelines, with over 150,000 water quality tests conducted annually.
Common Water Contaminants and Quality Issues in Perth
While Perth's water meets safety standards, several specific contaminants and quality issues affect Perth homes:
Water Corporation maintains chlorine levels between 0.4 and 1.0 mg/L throughout the distribution system. While essential for disinfection, chlorine creates a distinctive "swimming pool" taste that many find unpleasant. The intensity varies geographically (stronger near treatment facilities), seasonally (higher in summer), and even daily (higher in morning water).
Learn more about chlorine in Perth's water →
With calcium and magnesium levels typically ranging from 75-200 mg/L (as calcium carbonate), Perth's moderately hard water is particularly common in areas supplied by groundwater. This hardness creates scale buildup in appliances, white deposits on plumbing fixtures, reduced soap effectiveness, stiff laundry, and potential skin dryness. Scale in hot water systems can increase energy consumption by 15-30% and significantly shorten equipment life.
Learn more about water hardness in Perth →
Originating from natural minerals, aging pipes, disturbed deposits during maintenance, or internal plumbing corrosion, sediment can cause cloudy or discoloured water, visible particles, and fixture staining. Problems are often more noticeable after periods of non-use or in older homes.
Learn more about sediment in Perth's water →
Added at concentrations between 0.7-1.0 mg/L since 1968 for dental health benefits, some residents prefer to reduce fluoride levels for personal preference.
Learn more about fluoride in Perth's water →
These "forever chemicals" may be present in trace amounts in some water sources, though treatment processes keep levels within guideline values.
Learn more about PFAS in Perth's water →
While water treatment is designed to eliminate harmful microorganisms, bacteria can occasionally survive treatment processes or enter water through plumbing systems.
Learn more about bacteria in Perth's water →
These compounds can enter water supplies through agricultural runoff and may be of particular concern in certain areas.
Learn more about nitrates in Perth's water →
How Water Filtration Helps
The right water filtration system can address Perth's specific water quality challenges:
For Chlorine Removal
Activated carbon filters effectively remove chlorine taste and odour, immediately improving water palatability for drinking and cooking. Whole-house carbon filtration can also benefit showers and baths where chlorine exposure occurs through both skin absorption and inhalation.
For Hard Water
Water softeners or conditioners can prevent scale buildup, improving appliance efficiency and longevity while reducing cleaning efforts. Various technologies including ion exchange systems, Template Assisted Crystallization (TAC), and polyphosphate dosing offer different approaches based on your specific needs.
For Sediment
Mechanical filtration options ranging from simple sediment filters to backwashing systems can remove particles that affect water clarity and appliance function, preventing accumulation in aerators, showerheads, and appliance valves.
For Comprehensive Water Quality Improvement
Multi-stage filtration systems combining several technologies offer the most thorough approach for households seeking maximum water quality improvement, addressing everything from taste and odour to specific contaminants of concern.
Transform Your Home's Water Quality
Understanding Perth's water challenges is the first step, but taking action is what truly makes a difference for your home and family. We believe everyone deserves water that not only meets safety standards but also enhances daily life – from better-tasting morning coffee to longer-lasting appliances and more efficient cleaning.
We start by listening to your specific concerns, whether it's the chlorine taste that's bothering you, the scale buildup affecting your appliances, or worries about what might be in your water. Our water quality assessment isn't just about testing parameters – it's about understanding how water affects your everyday experiences and finding the right solution for your unique situation.
When you schedule a free water quality assessment with us, one of our experienced technicians will visit your home to examine your water's specific characteristics. We'll explain our findings in plain language, discuss how they relate to the challenges you're experiencing, and outline options that fit your priorities and budget. There's no obligation - just clear information to help you make the best decision for your household.
Ready to experience better water quality? Give us a call at (08) 9315 5545 or visit our website to schedule your free assessment. We serve homes throughout the Perth metropolitan area, from coastal suburbs to the hills, and everywhere in between.
Frequently asked questions
Below, we’ve compiled the most common questions about Water Filtration Perth to help you make an informed decision.
Yes, Perth's tap water consistently meets Australian Drinking Water Guidelines and is safe for consumption. Water Corporation conducts over 150,000 water quality tests annually to ensure compliance with health-based requirements. While the water is safe, many residents choose filtration to improve taste, reduce chlorine, or address specific aesthetic preferences.
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Read MoreHear what our customers have to say:
Had an emergency block in Kitchen sink a day before Christmas and couldn’t leave the apartment to fly for work. They were the only service I found that came in within a couple of hours and accommodated my request with quality workmanship and friendly service and it was a great relief for me. Recommend these guys. Thank you.
Ali Hamedi
Declan was absolute magic. Fixed my shower drain and gave me some useful plumbing tips for next time.
Leon Saunders
“Declan came and unblocked the drains in my duplex.
He is a hero!!!”
Marja Rentier
Declan saved the day again! Arrived promptly. Professional, charming and super efficient. One unblocked toilet and we are now fully operational again. I have No Probs on speed dial now 🙂
Elisabeth Rajan
I’ve now had No Probs Plumbing in to clear a kitchen drain, replace a hot water service, replace every ageing tap in the house and replace both toilet cisterns. Every single member of the No Probs team that I’ve met so far… perhaps 6 of the plumbing team alone… has been professional, friendly, and genuinely concerned for the outcome of the work to be perfect. I cannot recommend them more highly.
Paul Antoine
Called in No Probs plumbing for a blocked drain after complicated solutions offered by another plumber. Dillon discussed the issue, offered a simpler solution and organised his crew to execute the plan. Problem solved!
Roshan Rao
Just used Dillon’s company again today after a year. Excellent service by young Callum. Always found No Probls to be helpful, prompt and efficient. Fixed our blockage and were in and out in 40 minutes. Keep up the good work guys.
Suzanne Long
We had issues with a blocked drain over the xmas break so was worried we might not get a quick response but we were wrong. They called us pretty much straight back and within roughly 1hr they were at our house. The young man Jack was a really nice polite and professional person. He was happy for a chat and to explain some of the equipment he used. Unfortunately the blockage was on the mains sewer so couldn’t fix it but he rang the Water Corp and asked me to follow up with him if Water Corp didn’t attend within a couple of hours… Will definitely use them again!
Kevin Evans
I recently had the unfortunate experience of dealing with a blocked drain in my home. From the moment I contacted No Probs Plumbing & Gas, the team was professional, courteous, and incredibly responsive.
The scheduling process was seamless, and they were able to send one of their Plumbers Jack to my home within a few hours. When Jack arrived, he was not only punctual but also very knowledgeable. He took the time to assess the situation thoroughly and explained the potential causes of the blockage in a way that was easy to understand.
I was particularly impressed with his attention to detail and commitment to leaving my space clean and tidy after the job was completed.
Thank you Jack!!!
Shanelle Bull
Zac from NoProbs Plumbing was amazing and really worked hard to get the job done which was pretty horrible trying to clear an old grease trap blockage. Efficient, tidy and great communication throughout. Recommend Zac and the company to anyone. Price was reasonable for the work done. Happy customer.
Jaci Hills-Wright
Super responsive, cleared blockage/s & smell from drains within 1st hour of service. Informative & explained preventive measures we could take. Very happy with service.
Tamara Harman
No probs plumbing & electrical’ were great! Same day service was a lifesaver!! The guys were very friendly & professional and were quick to identify and resolve our drain blockage problem. Thumbs-up…I can definitely recommend using ‘No probs plumbing & electrical
Mia Hillyer
Had a blocked sewerage drain. No Probs came out the same day I spoke with them and not only cleared the blockage but sent a camera down to determine what the actual cause was. Turned out to be some small roots entering the pipework. Thanks for the prompt response and future recommendations guys!
James Rodoreda (Rodsy)
I would like to thank Declan and Jacob for taking the time and effort to get to the root of the problem with my blocked drains and for being willing to assist me at such short notice on a Friday afternoon.
I really appreciate your kindness and professionalism.
Kind regards
Enid Garrod
Enid Garrod
We had a blocked drain and from the first call till when the job was finished was easy,no fuss,on time and professional. Great communication and made no mess. Highly recommend to all.
Walter Ramage
We had Jacob come out to fix an issue with our blocked shower. His knowledge and expertise quickly removed the issue causing the blockage and rendered our shower operational once again. Thanks again Jacob and No Probs.
Tanya Boyanich
I used No Probs when my kids had kindly created a blockage in our toilet. Zac was so friendly and confidently sorted out the problem with as little fuss as possible. I felt like our toilet was in good hands. He also kindly answered my other questions for keeping it in good shape as we walked out the door.
Amy Springer
Had No Probs Plumbing out to replace my toilet, Connor was such a good bloke and did an awesome job too. Would highly recommend to anyone who needs plumbing work done!
Reuben Simcock
The person that did the scheduling was very efficient and explained all the costs up front.
The plumbers turned up on time and even sent a text when they were 20 minutes away.
The work was done well and each step was explained to me. The guys were polite and cleaned up after themselves.
Grant Stephens
Cam was on time, very knowledgeable, explained everything and gave me multiple options. When finished he made sure everything was cleaned up as well! It is good to see customer service does still exist. I would not hesitate to recommend them and will use them for any future work that needs to be done. Thanks Cam for a job well done. 😀
Tamarra Kemsley
I recently required the services of No Probs Plumbing for my house of plumbing horrors, Declan was excellent to deal with and managed to locate the issue and repair it quickly considering the work that was required. Also setting up a tap to help isolate the outside from the inside in an effort to find leak number two.
Not the first time I have used the company and deffo wont be the last – excellent service, efficient and great customer service from every single person I dealt with.
Jonti
Declan came today and fixed a shower head and 2 taps. He was friendly, professional and worked quickly. Did a great job.
I first had Dylan do work for me in the earlier days if his business. Great team of guys he had and good to see his business growing. Definitely refer no probs to anybody.
CK Taranaki
The guys arrived early and got right to it. they sorted what was causing the problem and anything else and informed us as to what needed doing and all costs. They let us know the options and we agreed on it. Both got stuck straight in and before we knew it, the job was done and everything cleaned up. no mess left behind. very happy with the workmanship, time doing the job and both very friendly and professional. Hoping to never need them again but if we do, we will get them again no questions asked. JOB WELL DONE!. NO PROBS
Bige Jones
Cannot recommend No Probs Plumbing highly enough. They were so fast, professional, kind, and knowledgeable. I appreciated how fast they arrived, the time they took to try and repair the old system and patience with me to make a decision on the new system. The workmanship was exceptional and were excellent value for money. Thank you
Rebecca Gaby
No Probs and their complete home filtration system are brilliant. They really know their product and are realistic with what your family or home needs. Their work is extremely neat and tidy aka they take pride in their work. Since installation we have experienced softer, clearer skin and water that tastes as it should – clean!! Best decision we made was to have the filtration system installed.
Janelle Edmondson
Quick response when contacted online. This was my second time using them and I am very satisfied with their work. I had issues with my sewage drainage. Conor was punctual and professional. He explained the issue with my sewage pipes, quoted the total costs upfront. My experiences have been positive with No Probs Plumbing and will definitely using them for future jobs if required.
Stefanie Lau
Been using No Probs for about 3 years and for 4 large jobs. Excellent team, well priced but more importantly they are reliable, trustworthy and honest. A rare commodity nowadays. Keep up the good work team.
James Rowbottam
Outstanding service, very professional and responsive. We had Connor come out the same day as our hot water system burst. He stayed late and got the job done thoroughly. Would recommend this service to anyone.
Holly Miles
Declan did a very good job installing my new hot water system and fixing up the leak issues. Very professional and giving me some good advice. Thank you, Declan.
Swanny
Called for assistance and received great and quick response.
Assessor on site 2 hours after reporting problem with toilet suite.
New suite installed less than 24 hours later with minimal disruption to floor tiles.
Clive Nealon
Hi, I recently had one of your electricians come out to install a new set of filters for my under the sink reverse osmosis water unit as well as repair a bad leak coming from my solar hot water system up on the roof.
The young man was very friendly and completed the work quicker than I has expected. I wish that I could remember his name as he was first rate. I have now used your company on several occasions and every time the men who have attended to do the work have all been of a high caliber and have done quality work and I couldn’t recommend your company highly enough.
Kind regards
Richard Byron
Richard Byron
I’ve used this company many times and they have always performed their duties to the highest standards. They’re polite, efficient , reliable and charge accordingly which is cheaper than many others. Will definitely continue to use them and highly recommend their services too.
Wilfred Victor
Get in touch
Call us during business hours, send us an email or fill out the quote request form and we'll be in touch as soon as possible.
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[email protected]
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(08) 9315 5545
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3/52 Roberts St, Osborne Park WA 6017