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Bacterial content readings and what they mean

No Alert Level Triggered

GREEN LEVEL
Surveillance Mode

AMBER LEVEL
Alert Mode

RED LEVEL
Action Mode

Enterococci measurement

 

<200 cfu/100mLd

200 to <500 cfu/100mLd

>500 cfu/100mLd

E.coli measurement

<100 cfu/100mLd

100 to <500 cfu/100mLd

>500 cfu/100mLd

Action Required

No restriction

  • No   Restrictions
  • Maintain   Regular monitoring
  • No   Action
  •  
  • Advise against primary contact.
  • Increase Water Quality Testing in line with testing frequency matrix.
  • CDC to provide warning that Lake is considered unsuitable for direct water contact activities including, swimming, bathing, kayaking
  • CDC to install signage "Lake Unsuitable for Primary Contact Activities”.
  • Advise against ALL use.
  • Increase Water Quality Testing in line with testing frequency matrix
  • CDC to provide warning that Lake is considered unsuitable for ALL water related activities
  • CDC to install signage "Lake Closed"

Health risks include:

  • Gastrointestinal complaints including vomiting   and diarrhoea from the consumption of water.
  • Non-gastrointestinal illnesses include, central  nervous system infections, respiratory complaints, liver or renal issues, ear  infections, skin irritations.