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Gold Coast Launches Real-Time Swim Safety Map to Help Residents Decide When It’s Safe to Dive In
Gold Coast Council has launched a new real-time water quality tool for 25 of the city’s most popular swimming spots, promising residents and tourists faster, clearer advice about when it is safe to get in the water – but also warning that heavy rain and pollution can still turn beaches and creeks unsafe at short notice.
What the council is doing
- The City of Gold Coast now regularly monitors recreational water quality at 25 key locations, including open beaches, creeks, estuaries, lakes and swimming enclosures.
- Routine sampling is done on a rotating roster roughly every 18 days and after heavy rainfall, with samples taken where people actually swim, such as between the flags.
- Water samples are analysed for enterococci bacteria at the council’s NATA-accredited Scientific Services laboratory using Australian Standard methods, and the program is audited to ensure results are accurate and reliable.
How the new prediction system works
- Because lab results take 24 to 48 hours, council has developed a prediction model that uses historical monitoring data, recent rainfall and pollution reports to estimate current water quality in near real time.
- An interactive online map shows each of the 25 sites with star ratings and colour codes, providing real-time water quality predictions that are updated every four hours throughout the day.
- The system classifies the likelihood of pollution as “unlikely”, “possible” or “likely”, and links its star rating approach to national guidelines from the National Health and Medical Research Council on safe recreational water.
When the water is unsafe
- Council warns that heavy rainfall can wash pollutants like faecal matter, animal waste, garden chemicals and street runoff into creeks, rivers and the ocean, temporarily pushing bacterial levels above safe swimming thresholds.
- During and after extreme wet weather or flooding, contamination and debris can linger longer than usual, meaning water might look murky, carry floating waste or conceal hidden hazards even after bacteria readings improve.
- At times, specific sites may be closed due to sewage overflows, pollution incidents, safety risks or maintenance, with beach closure alerts issued separately through council channels and emergency notifications.
Health risks and what is being tested
- Enterococci bacteria are used as an indicator of faecal contamination because they are found in the intestines of humans and warm-blooded animals; while they rarely cause illness directly, they signal the possible presence of more dangerous pathogens.
- Council also measures other water quality parameters, including pH, dissolved oxygen and salinity, and undertakes targeted algae monitoring when blooms are detected at sensitive sites like Lake Hugh Muntz.
- The monitoring program is aligned with NHMRC recreational water guidelines, which set out national frameworks for assessing microbial risks and helping local governments manage coastal, estuarine and freshwater swimming areas as safely as possible.
What swimmers are advised to do
- Swimmers are encouraged to check the city’s online water quality map before heading to beaches and inland swim spots, and to pay close attention to any on-site warning signs, beach closure notices and lifeguard advice.
- Officials recommend avoiding swimming during and for a period after heavy rainfall, steering clear of stormwater outlets and visibly polluted or murky water, and taking extra care with young children, older people and those with existing health conditions.
- Swimmers are encouraged to check the city’s online water quality map before heading to beaches and inland swim spots, and to pay close attention to any on-site warning signs, beach closure notices and lifeguard advice.
- Officials recommend avoiding swimming during and for a period after heavy rainfall, steering clear of stormwater outlets and visibly polluted or murky water, and taking extra care with young children, older people and those with existing health conditions.
The council stresses that its real-time predictions are a guide, not a guarantee, urging people to use their own judgement and to report any suspected sewage spills or pollution to the relevant hotline so risks can be investigated quickly.
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