The following map illustrates the Township Testing Program results from 2013 through 2016 and the townships tentatively scheduled for testing.
The map presents the current testing results by township. Townships with hash lines present initial (first year) testing results and townships without hash lines are final. Final results include two rounds of sampling and a process to remove faulty wells (i.e. cracked casing) and those near potential non-fertilizer sources of nitrate. Townships noted with initial results may change based on follow-up sampling and well assessments.
Township Testing Program results are reported for each county as well as in a comprehensive program overview. A summary of the most current data is listed below. Please visit the program website for additional reports.
Nitrate Testing for Private Wells-Results as of August 10, 2017 (PDF: 209 KB / 2 pages)
Townships with final results that indicate elevated levels of nitrate-nitrogen (nitrate) are subject to Part 2 of the Rule. The Health Risk Limit for nitrate-nitrogen in water is greater than or equal to 10 mg/L. The Health Risk Limit is set by the Minnesota Department of Health. Public well data is also used in Part 2 of the Rule but the data is not included on this map. To learn more about how nitrate concentrations are used to designate mitigation levels visit Part 2 of the Rule.