High Nitrate Levels in Drinking Water System Advisories

Nitrate is a naturally occurring substance that can be found in soil and may enter drinking water, particularly in areas where farming and food production take place. While moderate levels of nitrate generally do not affect health, elevated nitrate levels in drinking water are a health concern for pregnant individuals and children less than 1 year old.

If nitrate levels in drinking water exceed 10 mg/L, it is recommended to use an alternate water supply for pregnant individuals and infants up to one year of age, including when preparing baby formula and food, or use ready-to-use formula for bottle-fed infants. Breastmilk is not affected by nitrates and remains safe for infants.

PLEASE NOTE: Boiling the water will not remove nitrates. Boiling can increase nitrate levels because as water evaporates during boiling, the concentration of nitrates in the remaining water increases. Pregnant individuals and children under 1 year of age should not consume water containing high levels of nitrate, even after boiling.

Current Nitrate Level Advisories

The following drinking water systems have nitrate levels above 10mg/L: