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NVCA > Provincial Groundwater Monitoring Network

Water Quality Monitoring


What is the Provincial Water Quality Monitoring Network?

The Provincial Water Quality Monitoring Network (PWQMN) is a partnership between the Ontario Ministry of the Environment (MOE) and other conservation partners to undertake surface water quality monitoring throughout Ontario.

Why do we monitor surface water quality?

Surface water quality monitoring allows us to identify potential sources/causes of poor stream health and target effective strategies to improve stream health within our watershed. Long term monitoring allows us to evaluate the effectiveness of best management strategies over time.

How do we sample surface water?

Authority staff use a water quality probe to collect some of the water quality information at each sampling site. Staff also collect water quality samples in containers provided by the MOE and submit them to their laboratory for analysis.

Where and when do we sample surface water?

Staff sample 11 sites within the watershed. Three sites are located along Nottawasaga River with other sites located on major tributaries near confluence with river (Innisfil Creek, Pine River, Mad River, Boyne River, Willow Creek, Bailey Creek) or, in the Collingwood area, where streams discharge to Nottawasaga Bay (Pretty River and Silver Creek).

Eight water quality samples are collected at each site every year. Low flow and storm events are sampled during each season to capture a wide range of water quality conditions at each station.

What results are we seeing?

  • There is a general trend of increasing nutrients and turbidity (cloudiness of the water) along main river from Hockley Valley to Wasaga Beach under low flow conditions.

  • Innisfil Creek typically has the highest concentrations of nutrients and highest turbidity within the watershed.

  • Storm events result in significantly higher levels of nutrients and turbidity at all stations within the watershed