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What is Nitrate?
Nitrate forms when nitrogen from fertilizers, animal wastes, septic systems,
municipal sewage sludge, decaying plants and other sources combines with
oxygenated water.
Why should I test for Nitrate?
In infants under six months of age, nitrate exposure can cause a serious
condition called methemoglobinemia or “blue-baby syndrome.” Infants with
this condition need immediate medical care because it can lead to coma and
death. Nitrate taken in by pregnant women may reduce the amount of oxygen
available to the growing fetus. Test for nitrate if a pregnant woman or
infant will be drinking the water.
Every private well owner should have their water tested for nitrate at least
once. If you live in an area within 1/4 mile of a corn, soybean or vegetable
field, you should test your water for nitrate regularly. Well owners should
also test for nitrate regularly if their well is located near an area where
fertilizers are manufactured or handled; or an animal feed lot or
manure-storage area. In general, shallow wells and wells with short or
cracked casings have the highest risk of contamination, however deep wells
are also at risk in some areas. A 1994 survey of Wisconsin wells found
nitrate above the 10 parts per million (ppm) standard in 6.5% of the wells.
Thirty-four percent had nitrate above 2 ppm.
How can I test my water for Nitrate?
Your water can be tested for Nitrate at the La Crosse County Health
Department Laboratory. A Nitrate test requires about 4 ounces (1/2 cup) of
water, collected in any clean container. If you bring a water sample to the
Lab for Bacteria testing, a Nitrate can be done from the same sample. Be
sure to obtain a sterile sample bottle from the County Health Lab for
Bacteria testing.
Results will
be mailed to the person designated on the Lab slip.
Bring your water sample to the Lab, located at 300 4th St. North in the La
Crosse County Health and Human Services Building, 2nd Floor. Business hours
are Monday through Friday, 8:30 am to 5:00 pm. Water samples are accepted
until 4 pm daily.
Please call the Health Lab at 608-785-9733 if you have any questions about
your well water.
The La Crosse County Health Department Lab is a State of Wisconsin Certified
Laboratory.
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