ZipCheckup tracks Nitrate in Minnesota drinking water: 50 ZIP codes with detected levels on record. 20 ZIP codes exceed the EPA limit (10 mg/L (as nitrogen)). Nitrate carries a high health-risk designation.

Nitrate Contamination in Minnesota

ZipCheckup analyzed drinking water data across 1,009 ZIP codes in Minnesota for nitrate contamination. 50 ZIP codes have reported nitrate detections, and 20 have EPA violations on record.

The violation rate for nitrate in Minnesota is 2% of all ZIP codes — roughly in line with the national average.

EPA Standard for Nitrate

The EPA maximum contaminant level (MCL) for nitrate is 10 mg/L (as nitrogen), governed by the National Primary Drinking Water Regulations. Water systems that exceed this limit must take corrective action and notify consumers.

Worst ZIP Codes for Nitrate in Minnesota

These ZIP codes reported the highest nitrate levels in Minnesota based on CCR reports and EPA data:

Lowest Nitrate Levels in Minnesota

These ZIP codes had the lowest reported nitrate detections in Minnesota:

Health Effects of Nitrate

How to Remove Nitrate From Drinking Water

The most effective treatment for nitrate removal is Reverse Osmosis or Ion Exchange. Look for filters certified under NSF 53 / NSF 58 standards.

Check Your ZIP Code

Use the ZipCheckup water quality search to see nitrate data for your specific water system in Minnesota.