• Overview
• Waterways operating charter
• Drinking water quality
  • Parameters & Reporting Levels
  • Microbiological parameters
  • Pathogen monitoring
  • Routine physical parameters
  • Inorganic chemical parameters
  • Chemical and radiological parameters
  • Organic chemicals
• Environmental Performance
  • Eastern Treatment Plant
  • Western Treatment Plant
  • Rivers and creeks
  • Energy and greenhouse data
  • Water recycling initiatives
• Consultative committees

Microbiological parameters and pathogen monitoring

Exceeding reporting level and percentage in zones/population

The reporting levels for E. coli are based on Australian Drinking Water Guidelines (2004). Sampling results are based on monitoring at locations in our agreements with the retail water businesses. E. coli have been assessed using the defined substrate technology (Colilert) method and should not exceed the reporting level.

			No. Exceeding Reporting Level (%) in Zones / Population
Parameter / Retail Water Businesses	Reporting level	Total no. of zones	Total no. of tests	Total Exceedence		<10K			10K to 100K			>100K
				Fails	% Fails	No. Tests	Fails	% Fails	No. Tests	Fails	% Fails	No. Tests	Fails	% Fails
E.Coli (org/100mL)
All	1	72	5578	0	0.00	1716	0	0.00	3493	0	0.00	1666	0	0.00
YVW	1	33	3380	0	0.00	1373	0	0.00	1827	0	0.00	859	0	0.00
CWW	1	11	1499	0	0.00	-	-	-	973	0	0.00	682	0	0.00
SEW	1	30	2234	0	0.00	416	0	0.00	1241	0	0.00	939	0	0.00

Note: The results have been calculated using the interface monitoring locations as listed in the BWSA 1999 for each retail water company