Selenium has been measured at a running annual average (RAA) of 51 micrograms per liter (μg/L) during the Third Quarter 2025. This is a violation of the established selenium maximum contaminant level (MCL) of 50 μg/L.
What Does This Mean?
Selenium is an essential nutrient. However, some people who drink water containing selenium in excess of the MCL over many years could experience hair or fingernail losses, numbness in fingers or toes, or problems with their circulation.
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