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| Navajo Nation Environmental Protection Agency • Public Water Systems Supervision Program |
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Throughout the world, especially in developing
Indian Countries, there is a dire need for water
to fulfill basic human self-sufficiency demands.
In most cases, the problem is not the lack of
available water, but the inability to obtain it in a
cost-effective, reliable manner.
The most common method currently used to
extract water from the Navajo Nation is through
the use of submersible pumps, open wells, and
spring boxes. The disadvantages to these
methods range from the large amounts of fuel
needed to run pumps to sanitary problems and
potential disease from open wells.
Most regulated wells provide a clean, safe
supply of water; however, contaminants can
pollute livestock wells, and unfortunately you
cannot see, smell or taste most of them.
Consequently, you should test your water on a
regular basis. The decision on what to test your
water for should be based on the types of land
uses near your well. This brochure gives
information about several common
contaminants found in private wells. It should
help you decide when to sample your well and
how often, how to find a certified laboratory and
who to call for help.
Indian Countries, there is a dire need for water
to fulfill basic human self-sufficiency demands.
In most cases, the problem is not the lack of
available water, but the inability to obtain it in a
cost-effective, reliable manner.
The most common method currently used to
extract water from the Navajo Nation is through
the use of submersible pumps, open wells, and
spring boxes. The disadvantages to these
methods range from the large amounts of fuel
needed to run pumps to sanitary problems and
potential disease from open wells.
Most regulated wells provide a clean, safe
supply of water; however, contaminants can
pollute livestock wells, and unfortunately you
cannot see, smell or taste most of them.
Consequently, you should test your water on a
regular basis. The decision on what to test your
water for should be based on the types of land
uses near your well. This brochure gives
information about several common
contaminants found in private wells. It should
help you decide when to sample your well and
how often, how to find a certified laboratory and
who to call for help.
The PWSSP oversees drinking water facilities. A drinking
water facility or “public water system” is one that has 15
or more service connections and/or serves more than 25
persons for more than 60 days of te year. The NNSDWA
requires that all public water systems monitor for (collect
samples and have the samples analyzed) over 72
potential contaminants.
Livestock and Private wells are not regulated by the
PWSSP. As a result, the owners and operators of
livestock wells are not required to monitor for these 72
contaminants. Because of this, PWSSP recommends
that you haul your drinking water from an approved
source. The Navajo Tribal Utility Authority maintains
watering points where you can purchase safe drinking
water.
Please consult with your local community health
representative (CHR), clinic and health care provider or
the PWSSP for further information.
water facility or “public water system” is one that has 15
or more service connections and/or serves more than 25
persons for more than 60 days of te year. The NNSDWA
requires that all public water systems monitor for (collect
samples and have the samples analyzed) over 72
potential contaminants.
Livestock and Private wells are not regulated by the
PWSSP. As a result, the owners and operators of
livestock wells are not required to monitor for these 72
contaminants. Because of this, PWSSP recommends
that you haul your drinking water from an approved
source. The Navajo Tribal Utility Authority maintains
watering points where you can purchase safe drinking
water.
Please consult with your local community health
representative (CHR), clinic and health care provider or
the PWSSP for further information.
What Tests Should Be Done for My Private or Livestock Well?
Coliform bacteria live in soil, on vegetation, and in surface water. Coliform bacteria found in the intestines of
warm-blooded animals and their feces are called Escherichia coli or E. Coli. Some strains of coliform
bacteria can survive for long periods in soil and water and can be carried into well casings by wind or
insects. Bacteria washed into the ground by rainwater or snow melt are usually filtered out as the water
seeps through the soil, but they sometimes enter water supplies through cracks in well casings, poorly
sealed caps, fractures in the underlying bedrock, and runoff into sinkholes. Coliform bacteria are the most
common contaminant found in livestock water systems. Most coliform bacteria do not cause illness, but
indicate a breach in the water system. However, since E.coli bacteria are found in fecal material, they are
often present with bacteria, viruses and parasites that can cause flu-like symptoms such as nausea,
vomiting, fever and diarrhea. Private wells should be tested at least monthly or quarterly for bacteria, by a
laboratory that performs an E.coli test when total coliform are present. Test again if there is a change in the
taste, color, odor or appearance of your water. The coliform test is one of the most important tests you
should have done on your well water. However, bacteria are only one of many possible contaminants. A
negative bacteria test is good news, and means that there are no bacteria in your water. While this is good
news, this does not mean your well is free of other minirals that may cause health problems.
Nitrate forms when nitrogen from fertilizers, animal wastes, septic systems, decaying plants and other
sources combines with oxygenated water. Also nitrogen competes with oxygen in your blood and causes
health problems. 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 or death. Pregnant women may not have the proper amount of oxygen available
to the growing fetus if they drink water containing nitrate. Everyone should have their water tested for nitrate
at least once. Well owners should also test for nitrate regularly if their well is located near an animal waste
or septic 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.
Arsenic occurs at some area of low levels in soil and bedrock, but has been found at levels above drinking
water standards in the Navajo Nation. Long term exposure to arsenic at high levels can result in nervous,
digestive system problems and to skin cancer.
Radionuclides is a radioactive element found in soil and bedrock that can be released into groundwater.
Radionuclides levels above the drinking water standard have been detected in parts of the Navajo Nation
where wells draw water from shallow or deep formations. Exposure to high levels of radium over a long
period of several years can increase your risk of developing cancer. Consult DNR on whether to test for
radium, if radionuclides were found to be high.
Nuisance bacteria like, iron and sulfur bacteria may also be present in water. Research has determine that
these organisms do not pose a health threat, but they can affect the taste, odor and appearance of water.
You may have a nuisance bacteria problem if your water has a rotten egg smell or if you notice slime in tank.
If you suspect a nuisance bacteria problem, try disinfecting the well and water system.
Coliform bacteria live in soil, on vegetation, and in surface water. Coliform bacteria found in the intestines of
warm-blooded animals and their feces are called Escherichia coli or E. Coli. Some strains of coliform
bacteria can survive for long periods in soil and water and can be carried into well casings by wind or
insects. Bacteria washed into the ground by rainwater or snow melt are usually filtered out as the water
seeps through the soil, but they sometimes enter water supplies through cracks in well casings, poorly
sealed caps, fractures in the underlying bedrock, and runoff into sinkholes. Coliform bacteria are the most
common contaminant found in livestock water systems. Most coliform bacteria do not cause illness, but
indicate a breach in the water system. However, since E.coli bacteria are found in fecal material, they are
often present with bacteria, viruses and parasites that can cause flu-like symptoms such as nausea,
vomiting, fever and diarrhea. Private wells should be tested at least monthly or quarterly for bacteria, by a
laboratory that performs an E.coli test when total coliform are present. Test again if there is a change in the
taste, color, odor or appearance of your water. The coliform test is one of the most important tests you
should have done on your well water. However, bacteria are only one of many possible contaminants. A
negative bacteria test is good news, and means that there are no bacteria in your water. While this is good
news, this does not mean your well is free of other minirals that may cause health problems.
Nitrate forms when nitrogen from fertilizers, animal wastes, septic systems, decaying plants and other
sources combines with oxygenated water. Also nitrogen competes with oxygen in your blood and causes
health problems. 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 or death. Pregnant women may not have the proper amount of oxygen available
to the growing fetus if they drink water containing nitrate. Everyone should have their water tested for nitrate
at least once. Well owners should also test for nitrate regularly if their well is located near an animal waste
or septic 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.
Arsenic occurs at some area of low levels in soil and bedrock, but has been found at levels above drinking
water standards in the Navajo Nation. Long term exposure to arsenic at high levels can result in nervous,
digestive system problems and to skin cancer.
Radionuclides is a radioactive element found in soil and bedrock that can be released into groundwater.
Radionuclides levels above the drinking water standard have been detected in parts of the Navajo Nation
where wells draw water from shallow or deep formations. Exposure to high levels of radium over a long
period of several years can increase your risk of developing cancer. Consult DNR on whether to test for
radium, if radionuclides were found to be high.
Nuisance bacteria like, iron and sulfur bacteria may also be present in water. Research has determine that
these organisms do not pose a health threat, but they can affect the taste, odor and appearance of water.
You may have a nuisance bacteria problem if your water has a rotten egg smell or if you notice slime in tank.
If you suspect a nuisance bacteria problem, try disinfecting the well and water system.
How Can I Have My Well Tested?
Laboratories use an EPA certified laboratories to test
your drinking water for possible contaminants. Navajo
EPA PWSSP may help you find a certified laboratory in
your area. Laboratories are also listed in the yellow
pages of your telephone directory. When you call a
laboratory, ask if the lab is certified for the test you want.
When your test has been completed, the laboratory will
send you the results directly. Navajo EPA-PWSSP would
like a copy of the results. The results can contribute to
an overall view of the Navajo Nation Water Resources.
Please use the Navajo Nation well ID to specifically
identify your well.
Laboratories use an EPA certified laboratories to test
your drinking water for possible contaminants. Navajo
EPA PWSSP may help you find a certified laboratory in
your area. Laboratories are also listed in the yellow
pages of your telephone directory. When you call a
laboratory, ask if the lab is certified for the test you want.
When your test has been completed, the laboratory will
send you the results directly. Navajo EPA-PWSSP would
like a copy of the results. The results can contribute to
an overall view of the Navajo Nation Water Resources.
Please use the Navajo Nation well ID to specifically
identify your well.