The following charts and observations have been taken from a static dataset maintained by Steve (Thanks Steve). The charts show phosphorus concentrations, turbidity, and observations over the years when samples were taken for Troy lake.

Phosphorus

Note: Charts are interactive, and series data can be removed from each chart by clicking on the month to disable/enable each data series.

Turbidity

The Secchi Disk is a plain white, circular disk 30 cm (12 in) in diameter used to measure water transparency or turbidity in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity.

The following chart is the measurement of turbidity over the years, shown in negatives for better visualization.

Combined Measurements

Physical Observations

Year	Observations
2011	Onset of significant algae bloom following Township draining the beaver pond along the Township road in the Spring
2012	Significant algae bloom is evident again
2013	Still discolouration but not as severe as previous 2 summers
2014	Lake is closer to normal for the summer season. Lake data suggests we are closer to longer term average conditions (still enriched but okay for a shallow spring-fed lake with low turnover) 2015
2016	We are on the right track
2017	We are lower on Phosphorous than the 10 year average-GOOD
2018	Our data is going in the wrong direction again
2019	Significant algae bloom is evident again in August, later confirmed as Blue-Green Algae