Since 2005, the Well Educated program has provided a means of state-wide ground water quality data collection. This data is processed and ultimately stored in a large-scale database. Certain aspects of the data can be extracted from this database to create data products such as water quality results maps and summary statistics. Currently, program data collected over the years 2015-2017 has been processed and compiled for use in these products.

Interactive Map

Instructions: Open the map below and click on your county to view testing recommendations and parameters of concern in your area.

map of counties in montana

Click Here to open map!


Statewide Parameters of Concern

MCL = Maximum Contaminant Level

All Parameters with Exceedances MCL Units
Arsenic 0.01 mg/L
Fluoride 4 mg/L
Nitrogen, Nitrate+Nitrite as N 10 mg/L
Selenium 0.05 mg/L
Uranium 0.03 mg/L
Lead* 0.015 mg/L
Copper* 1.3 mg/L
*Lead and copper typically come from plumbing fixtures rather than groundwater, however, corrosive groundwater can exacerbate the issue.