Nitrate contamination typically comes from agricultural runoff and fertilizers. The EPA maximum contaminant level is 10 ppm. These systems have the lowest nitrate concentrations.
3.90 ppm
Lowest Nitrate Level
4.91 ppm
Average (Top 25)
10 ppm
EPA MCL
High nitrate levels in drinking water can be particularly harmful to infants and pregnant women. In infants, high nitrate levels can cause "blue baby syndrome," a serious and potentially fatal condition.
Nitrate contamination is common in agricultural areas where fertilizers and animal waste can seep into groundwater. Minnesota's agricultural regions face higher risk of nitrate contamination.
| Rank | City & System | Nitrate (ppm) | Overall Score | Action |
|---|---|---|---|---|
#1 | Buckman MN1490001 | 3.90 61% below EPA MCL | C75 | View Details → |
#2 | Minneapolis MN1180016 | 4.00 60% below EPA MCL | C75 | View Details → |
#3 | PRIOR LAKE MN1700020 | 4.20 58% below EPA MCL | B85 | View Details → |
#4 | Redwood Falls MN1650015 | 4.40 56% below EPA MCL | C75 | View Details → |
#5 | OAKDALE MN1820027 | 4.40 56% below EPA MCL | C75 | View Details → |
#6 | RICHFIELD MN1270060 | 4.40 56% below EPA MCL | C75 | View Details → |
#7 | Marshall MN1420012 | 4.40 56% below EPA MCL | C75 | View Details → |
#8 | Hastings MN1190012 | 4.40 56% below EPA MCL | C75 | View Details → |
#9 | Belle Plaine MN1700001 | 4.50 55% below EPA MCL | C75 | View Details → |
#10 | ST CLOUD MN1050008 | 4.50 55% below EPA MCL | C75 | View Details → |
#11 | ST CLOUD MN1730049 | 4.60 54% below EPA MCL | C75 | View Details → |
#12 | AUSTIN MN1500018 | 4.60 54% below EPA MCL | C75 | View Details → |
#13 | Chaska MN1300006 | 4.60 54% below EPA MCL | C75 | View Details → |
#14 | ST CLOUD MN1730055 | 4.70 53% below EPA MCL | B85 | View Details → |
#15 | Sauk Rapids MN1050005 | 4.70 53% below EPA MCL | C75 | View Details → |
#16 | AITKIN MN1010012 | 4.75 52% below EPA MCL | F40 | View Details → |
#17 | ROCHESTER MN1550017 | 4.80 52% below EPA MCL | C75 | View Details → |
#18 | Blaine MN1020006 | 4.94 51% below EPA MCL | B85 | View Details → |
#19 | ST CLOUD MN1730044 | 5.00 50% below EPA MCL | C75 | View Details → |
#20 | Blaine MN1020010 | 5.23 48% below EPA MCL | C75 | View Details → |
#21 | Foley MN1050001 | 5.50 45% below EPA MCL | F45 | View Details → |
#22 | Hutchinson MN1430004 | 5.70 43% below EPA MCL | F45 | View Details → |
#23 | Detroit Lakes MN1030006 | 6.30 37% below EPA MCL | F45 | View Details → |
#24 | Park Rapids MN1290011 | 6.90 31% below EPA MCL | F45 | View Details → |
#25 | Owatonna MN1740007 | 7.30 27% below EPA MCL | F45 | View Details → |
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