Blending The third and most common way to reduce nitrates is to dilute the nitrate-polluted water by blending it with water from another source that has low nitrate concentrations. Blending the two waters produces water that is low overall in nitrate concentration. However, blended water is not considered safe enough for infants. There is no simple way to remove all nitrate from your water. Although it is common to think of boiling, softening, or filtration as a means of purifying water, none of these methods reduce nitrate contamination.
Boiling water is, in fact, the worst thing to do because it actually concentrates the nitrate.
Softening and filtration do nothing at all to remove nitrate. Remember that nitrate is an essential nutrient for plant growth. Only when there is too much nitrate in the soil does it become a problem in water. Routine water testing is important to protect the health of families. If nitrate levels in a water supply exceed the present water quality standards, low-nitrate water must be provided for infants to drink.