This site is operated in cooperation with the U.S. Geological Survey's Toxic Substances Hydrology Program, Minnesota Pollution Control Agency, Enbridge Energy Inc., and Beltrami County.

Water levels below land surface are accurate to 0.01 feet. Water levels above National American Vertical Datum of 1988 (sea level) are calculated by subtracting recorded water levels from the land surface elevation, which is accurate to ± 0.01 feet based on a differential GPS survey. Water-level differences are accurate to within 0.01 feet.

Water temperatures during Dec. 20, 2011 at 17:00 CST to Oct. 24, 2013 at 11:00 CDT were measured with KPSI 500 transducer and were accurate to ±0.3°C, due to the noisiness in the water temperature record and the use of an uncalibrated thermistor. Water temperatures during Oct. 24, 2013 at 12:00 CDT to 11 Oct. 2021 at 09:00 CDT were accurate to ±0.3°C, due to the use of an uncalibrated thermistor. Differences in temperature are accurate to 0.1°C.Water temperatures during 25 Oct. 2021 at 16:30 CDT to 17 Nov. 2021 at 10:00 CST were accurate to ±0.1°C. Differences in temperature are accurate to 0.1°C. However, all water temperature data recorded during this period were inaccurate and deleted from the record. Water temperatures during 08 Dec. 2021 at 09:30 CST to the present are accurate to ±0.1°C. Differences in temperature are accurate to 0.1°C.