Surface Water Quality Indicator Results for Swan Lake/Berrara Creek Catchment 2002

Swan Lake/Berrara Creek Catchment - 2006

What does the Data tell us for 2005/2006

Berrara Creek
Throughout the 2005-06 sampling period, Berrara Creek exhibited generally good results in terms of water quality. However, bacterial levels at the times of sampling were well above swimming guidelines.

Swan Lake
The water quality index (WQI) rating at site 37, located at the bridge on The Springs Road was 'Good' for the 2005/06 reporting period. The rating was restricted to "good" due to higher pH levels combined with elevated nitrogen levels in November 2005 and June 2006. Chlorophyll-a levels were negligible thought. Nitrogen frequently exceeds the guideline value of 0.5 mg/L around site 37 though Phosphorous rarely exceeds its guideline value of 0.05 mg/mL. Faecal coliforms were lower than the swimming guideline of 150 cfu/100mL across all sites reflecting the lack of runoff over the reporting period.

Figure 36 - Water Quality Sampling Locations for Swan Lake Catchment

Figure 37 - Water Quality Sampling Locations for Berrara Creek Catchment

Graph 83 - Water Quality Index Swan Lake

Graph 84 - Dissolved Oxygen Levels Swan Lake

Graph 85 - Mean Faecal Coliform Levels Swan Lake

Graph 86 - Nutrient Levels Swan Lake

Graph 87 - Dissolved Oxygen Berrara Creek

Graph 88 - Mean Faecal Coliform Levels Berrara Creek