This site is monitored as part of the USGS National Groundwater and Streamflow Information Program.

Water levels below land surface are accurate to 0.01 feet. Water levels above North American Vertical Datum of 1988 (sea level) are calculated by subtracting recorded water levels from the land surface elevation, which is accurate to ± 0.08 feet based on a differential GPS Survey. Water-level differences are accurate to within 0.01 feet.

Water temperature during 01 Dec. 2016 at 14:00 CST to 22 Sept. 2017 at 16:00 CDT (measured with OTT Orpheus Mini transducer) were accurate to plus-or-minus 0.1°C. Differences in temperature were accurate to 0.1°C. Water temperature during 22 Sept. 2017 at 17:00 CDT to the present (mesaured with KPSI 500 transducer) is accurate to plus-or-minus 0.3°C, due to noisiness in the water temperature record, especially during winter & spring months. Differences in temperature is accurate to 0.3°C.

Precipitation is accurate to 0.01 inches except during freezing periods (about Dec. through early Apr.). The rain gage is unheated and uncovered. The precipitation data during freezing periods result from melting of snow (accumulated in the rain gage) during warm periods and do NOT represent actual precipitation. Precipitation totals during freezing periods may underestimate actual totals because the rain gage funnel may be full of snow (preventing further accumulation) or because snow in the funnel may sublimate instead of melt.