Volunteers monitored Lake Langlois from 2001-2008, 2014-2015, 2019-2020 and resumed again in 2024.
The key takeaways from the 2024 monitoring season are:
• Langlois Lake continues to have very clear water, with low nutrient concentrations and low algal growth. • While lake monitoring has not been consistent over the years, long-term trends suggest that water quality in Lake Langlois has been improving over time, with decreasing nitrogen concentrations. • Nitrogen-to-phosphorus (N:P) ratios were above 25 for most of the monitoring season. This indicates a low likelihood for the algal community to be dominated by cyanobacteria (which have the ability to produce toxins). • No algal blooms were reported for toxin testing in 2024.
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The average of these three TSI indicators during the growing season can be used to place lakes in one of three broad categories: <40 = oligotrophic (low productivity), 40 to 50 = mesotrophic (moderate productivity) >50 = eutrophic (highly productive).