Lake water quality is often measured by total phosphorous or chlorophyll a measurements as dictated by WISCALM thresholds. Vilas County Land & Water Conservation took a deep dive into data collected by both professionals and volunteers and was able to analyze trends on over 80 lakes in Vilas County. We found a very wide range of trends, many being statistically significant. Where possible, we also looked at trends for other parameters such as nitrogen, calcium, pH, and chloride. Perhaps we can consider action when we see a lake speeding towards its WISCALM thresholds, but before it is considered impaired?