Selenium
Naturally occurring element that is usually found in combination with other substances, including sulfide minerals, silver, copper, lead, and nickel minerals. It is used in photographic devices, gun bluing, plastics, paints, anti-dandruff shampoos, vitamin and mineral supplements, fungicides, and certain types of glass. Selenium is an essential nutrient at low levels, but exposure to high levels may result in dermal and neurological problems.
EPA MCLG Level
50 ppb
Maximum level that poses minimal health risk based on the latest science
Health Effects
Selenium is an essential nutrient for human health. However, prolonged exposure to selenium at levels above the EPA drinking water limits can result in adverse health effects, including: hair or fingernail loss, numbness in fingers or toes, and circulatory problems. Health protective benchmarks for selenium have been developed based on observed dermal, hematological, and neurological effects related to high levels of selenium exposure, known as selenosis.
Affected Organs & Systems:
Common Sources
- Occurs naturally in soil and rocks and enters surface and groundwater primarily through natural weathering
- Fossil fuel burning and industrial waste from steel plants and metal smelters also contribute to the release of selenium into the environment
How to Remove It
Water filters certified under the following NSF standards are effective at removing Selenium:
EPA MCLG Level
The EPA MCLG represents the maximum level that poses minimal health risk based on the latest scientific research. It's often more protective than federal legal limits.
Contaminant Type
Selenium is classified as a Metals contaminant.
This contaminant primarily affects the nervous-system, blood.
Check Your Water
Find out if Selenium is in your tap water.
Search Your CityTest Your Water for This Contaminant
Public water reports may not test frequently enough or at your specific tap. Professional home testing provides current, location-specific results.
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