The Lake John Association commissions surveys of the lake. Below are results of those surveys:
- Lake John Vegetation Survey – August 2020
- Curlyleaf Pond Survey –April 20, 2020
- Starry Stonewort Search – Lake John, Wright County, Minnesota, October 1, 2019
- Eurasian Watermilfoil Survey – June 21, 2019
- Starry Stonewort Search for Lake John, Wright County, Minnesota, September 28, 2018
- 2018 Eurasian Watermilfoil Delineation, June 18, 2018
- Eurasian Watermilfoil Survey – July 20, 2017
- Starry Stonewort Survey – June 22, 2017
- Assessment of Native Plants Post Treatment – June 8, 2017
- Curlyleaf Pondweed Survey – June 8, 2017