Community Health Alert – Recreating in Moore River during summer (December to March)
Residents and visitors to Moore River are reminded to be aware of the potential health risks of natural waters.
Natural waterways like Moore River can contain many forms of bacteria, algae and amoeba. Swimming and/or swallowing water contaminated with high levels of microbiological contamination can put you at risk of illness such as gastroenteritis, skin irritations, or respiratory, ear and eye infections. Bacteria, algae and amoeba can occur from a number of sources including farming activities, domestic animals and wildlife.
The Shire of Gingin Environmental Health Service regularly tests the Moore River in Guilderton as part of the State Health Department’s Recreational Water Sampling Program.
Thermophilic naegleria
Thermophilic naegleria refers to a group of microorganisms called amoebae and are tolerant to 42°C. Naegleria fowleri is an organism within this group that causes the particularly dangerous waterborne disease known as amoebic meningoencephalitis.
Thermophilic naegleria has been identified in river water samples obtained from the Moore River in previous years. The Shire advises bathers who frequent or visit this area for recreational swimming that precautions should be taken to avoid this organism.
Please note that Naegleria fowleri has not been identified in any recreational water bodies within the Shire of Gingin to date. However Thermophilic Naegleria does get detected and is considered to be the pre-cursor to possible Naegleria fowleri.
Warning for Recreational Swimmers in Moore River
All users of Moore River are urged to take precautions to ensure they are not exposed to potentially fatal amoebic meningitis from Naegleria fowleri.
Naegleria fowleri is found in unchlorinated warm fresh water and soil. Any water supply that seasonally exceeds 30°C or continually exceeds 25°C may be a risk. This includes lakes, rivers, dams, bores, tanks, pipelines, natural hot waters/springs as well as spas and swimming pools that are poorly maintained, under-chlorinated or unchlorinated. Naegleria cannot survive in water that is clean, cool and adequately chlorinated.
How do you get infected?
A very rare but often fatal waterborne disease (amoebic meningitis or meningoencephalitis) can occur if contaminated water goes up into the nose.
This may occur when people swim, dive or fall into warm unchlorinated water containing Naegleria, or when children play under sprinklers or with hoses using this water, or when infected water is inhaled to cleanse the nasal passages.
Children and young adults appear to be more susceptible to infections than adults. Infections usually occur when it is hot for prolonged periods of time, which result in higher water temperatures. You cannot get infected by swallowing water containing Naegleria.
How do I protect myself and my family?
When using, recreating and/or swimming in warm fresh water bodies such as the Moore River and/or thermal pools, reduce the risks to your health by following these simple rules:
- Look for posted warning signs and follow the advice on them.
- Do not jump or dive into the water (or force any water into the nose).
- Do not swim in water that looks murky or smells unpleasant.
- Avoid swallowing water or putting your head under water.
- Avoid swimming if you have an open wound or infection.
If you wish to access any more information on disease and recreational waters, please go to the Department of Health’s website.
Alternatively, please contact the Shire’s Environmental Health Services (see below). This information is provided for the safety and wellbeing of you and your families.