What is nitrate?
Nitrate is a compound
that is formed naturally when nitrogen combines with oxygen or ozone. Nitrogen
is essential for all living things, but high levels of nitrate in drinking
water can be dangerous to health, especially for infants and pregnant women. Nitrates
are also made in large amounts by plants and animals, and are released in smoke
and industrial or automotive exhaust.
Where and how does
nitrate get into drinking water?
Nitrate can occur
naturally in surface and groundwater at a level that does not generally cause
health problems. High levels of nitrate in well water often result from
improper well construction, well location, overuse of chemical fertilizers, or
improper disposal of human and animal waste. Sources of nitrate that can enter
your well include fertilizers, septic systems, animal feedlots, industrial
waste, and food processing waste. Wells may be more vulnerable to such
contamination after flooding, particularly if the wells are shallow, have been
dug or bored, or have been submerged by floodwater for long periods of time.
How can I find out
whether there is nitrate in my drinking water?
If you suspect a problem
and your drinking water comes from a private well, you may contact your state
certification officerexternal icon for a list of laboratories in your area that
will perform tests on drinking water for a fee.
How do I remove nitrate
from my drinking water?
Nitrate may be
successfully removed from water using treatment processes such as ion exchange,
distillation, and reverse osmosis. Contact your local health department for
recommended procedures.
Heating or boiling your
water will not remove nitrate. Because some of the water will evaporate during
the boiling process, the nitrate levels of water can actually increase slightly
in concentration if the water is boiled. Mechanical filters or chemical
disinfection, such as chlorination, DO NOT remove nitrate from water.
Remember to have your
well water tested regularly, at least once a year, after installing a treatment
system to make sure the problem is controlled.
https://www.cdc.gov/healthywater/drinking/private/wells/disease/nitrate.html