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  • What is Vermiculite?

    Vermiculite is the mineralogical name given to hydrated laminar magnesium-aluminum-iron silicate that resembles mica in appearance. All vermiculite ores contain a range of other minerals that were formed along with the vermiculite in the rock. Vermiculite ores from some sources have been found to contain asbestos minerals but asbestos is…

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  • Will boiling my water help?

    No. Boiling water will NOT reduce nitrate levels. In fact, it will make the level of nitrate worse because some of the water will evaporate but the nitrate will not. This increases the concentration of nitrate in water.

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  • Is it safe to shower or bathe in water if it is over the nitrate MCL of 10 mg/L?

    Nitrate is only a concern for ingestion (eating and drinking). It is not absorbed through your skin. People who install filter systems for nitrate often install them just for their kitchen sink faucet, and they use that faucet for their cooking and drinking water.

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  • What is EPA doing?

    EPA is working with its governmental partners and other stakeholders to investigate and address the issue. Most recently, EPA issued a letter to the state of Minnesota requesting a plan of action to address nitrate contamination in drinking water.

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  • What should I do if my water has elevated nitrates and/or exceeds the MCL?

    If nitrate exceeds the MCL of 10 mg/L, you should find a safe alternative drinking water supply. The quickest thing to do is to begin using bottled water for drinking. Another option is to install a treatment that will remove nitrate from your water such as reverse osmosis or a…

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  • Why is nitrate contamination a concern?

    Nitrate is an acute contaminant, meaning that health effects can occur immediately (I.e. within hours or days) of short-term exposure. Too much nitrate in your body makes it harder for red blood cells to carry oxygen. While most people recover quickly, this can be very dangerous for infants and some…

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  • What are some uses of Vermiculite?

    Vermiculite has been used in various industries for over 80 years. It is used in the construction, agricultural, horticultural and industrial markets. Examples of products that contain vermiculite include potting soil mixes, loose fill insulation, and packing material. For more information, visit the EPA webpage: Protect Your Family from Asbestos-Contaminated…

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  • How do I have my drinking water tested in the future?

    Minnesota Department of Health (MDH) recommends you use an accredited laboratory to test your water. Contact an accredited laboratory to get sample containers and instructions or ask your county environmental or public health services if they provide well testing services. Accredited Labs in Minnesota Accepting Drinking Water Samples from Private…

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  • What are the possible health effects of nitrate exposure?

    Short-term: Excessive levels of nitrate in drinking water have caused serious illness and sometimes death. The serious illness in infants is due to the conversion of nitrate to nitrite by the body, which can interfere with the oxygen-carrying capacity of the child’s blood leading to blue baby syndrome (methemoglobinemia). This…

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  • What is nitrate?

    Nitrate (NO3) is a compound of nitrogen and oxygen naturally found in air, soil, water, and some food. Plants and animals require nitrates for their survival and growth, and the human body also produces this compound. In industry, nitrate is used as fertilizers for crops and lawns. Additionally, nitrates are…

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  • I use a carbon filter. Will this help?

    Activated carbon filters, such as those in a “Brita” water pitcher, DO NOT remove nitrates.

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  • Does a home seller have to disclose to a potential buyer that a home contains asbestos? What about vermiculite?

    Federal law does not require the seller to disclose to a buyer that their home contains asbestos or vermiculite. State or local requirements may require disclosure. Contact your state about such requirements. Other Frequent Questions about Asbestos Learn About Asbestos Asbestos and School Buildings Information for Owners and Managers of…

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  • My attic has vermiculite insulation in it. Am I at risk? Should I take it out?

    If you have vermiculite insulation in your home, you should assume this material may be contaminated with asbestos and be aware of steps you can take to protect yourself and your family from exposure to asbestos. The EPA recommends that vermiculite insulation be left undisturbed. Airborne asbestos fibers present a…

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  • How to protect yourself from nitrate exposure?

    Private well owners Assess the location of your well, wells found near sources of nitrates may have a greater risk of contamination. Sources include: farm fields, barnyards, feedlots, septic tanks, municipal wastewater treatment systems or “sludge” and manure spreading sites. Ensure your well is up to code with state regulations…

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