Beach health and monitoring

Monthly data on E. coli and Enterococci bacteria levels in the water at Boags Rocks, on the Mornington Peninsula.

Our Eastern Treatment Plant’s EPA Victoria licence allows us to release highly treated wastewater into the ocean at Boags Rocks, but requires us to monitor water quality to make sure it’s safe.

For more information on Melbourne beach water quality, please see the Beach Report on the EPA website.

Water quality standards

EPA Victoria’s state environment protection policy, Waters of Victoria, views water quality as acceptable for recreation if the:

  • E. coli median is less than 150cfu per 100ml
  • Enterococci median is less than 35cfu per 100ml
  • Enterococci 75th Percentile is less than 150cfu per 100ml

Data last updated: 10 October 2017

Bacteria Median (cfu per 100ml) 75th Percentile (cfu per 100ml)
E. coli 0  
Enterococci 0 0

Median bacteria levels are calculated from five water samples collected over 30 days.

The 75th Percentile Enterococci results are calculated from eleven water samples over approximately 10 weeks and tested by an accredited independent laboratory.

This method accounts for differences in individual samples due to wind, boats and birds.


Last updated:
14 December 2017