Reverse Osmosis FAQs: Your Top Questions About RO Water Systems Answered

Reverse osmosis water filtration system answering common RO questions

Reverse osmosis is one of the most widely used water-treatment technologies for producing highly filtered drinking water at home. But before buying or maintaining an RO system, homeowners often have questions about safety, contaminants, minerals, water waste, maintenance, pressure, and cost. This guide answers the most common reverse osmosis FAQs in one place. If you’re […]

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Is Reverse Osmosis Water Safe? What You Need to Know Before Drinking RO Water

Glass of reverse osmosis water beside an under sink RO filtration system

Reverse osmosis, commonly called RO, is one of the most effective household water-treatment technologies available. It can reduce a wide range of dissolved contaminants, including many heavy metals, salts, inorganic compounds, and certain organic chemicals. The EPA describes reverse osmosis as a membrane process capable of removing a broad range of contaminants from drinking water. […]

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Microbial Contaminants in Drinking Water: Bacteria, Viruses, and Parasites

Microbial contaminants in drinking water including bacteria viruses and parasites

Clean drinking water is essential for good health, but water can sometimes contain microbial contaminants—microscopic organisms capable of causing illness. These contaminants include bacteria, viruses, protozoa, and other microorganisms. Microbial contamination is particularly important because even relatively small amounts of some disease-causing organisms can create a health risk. EPA states that for microbial contaminants that […]

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Bacteria and Viruses in Drinking Water: Health Risks, EPA Guidelines, Testing & Filtration

Bacteria and viruses in drinking water and water filtration

Bacteria and viruses are among the most important biological contaminants that can affect drinking water. Unlike many chemical contaminants, microorganisms can multiply or spread rapidly and may cause illness after relatively short-term exposure. Potential sources include human and animal waste, sewage, agricultural runoff, failing septic systems, flooding, contaminated groundwater, and problems within water distribution systems. […]

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Pharmaceuticals in Drinking Water: Health Risks, EPA Guidelines, Testing & Filtration

Pharmaceuticals in drinking water and water filtration

Pharmaceuticals in drinking water are an emerging water-quality concern. Trace amounts of prescription drugs, over-the-counter medications, and veterinary pharmaceuticals can enter rivers, groundwater, reservoirs, and wastewater streams and, in some circumstances, be detected downstream of treatment facilities. The important distinction is that detecting a pharmaceutical in water does not automatically mean the water is unsafe […]

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Pesticides in Drinking Water: Health Risks, EPA Guidelines, Testing & Filtration

Pesticides in drinking water and water filtration

Pesticides play an important role in agriculture, landscaping, pest control, and public-health programs, but some pesticide chemicals can enter drinking-water sources through agricultural runoff, groundwater contamination, stormwater, and other pathways. Whether pesticides in drinking water present a health concern depends on which pesticide is present, how much is present, and how long people are exposed. […]

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Microplastics in Drinking Water: Health Risks, EPA Guidelines, Testing & Filtration

Microplastics in drinking water and water filtration

Microplastics have become an increasingly important drinking-water concern as researchers continue to detect tiny plastic particles in tap water, bottled water, rivers, groundwater, and other parts of the water cycle. Unlike contaminants such as lead, arsenic, or nitrate, microplastics are particles rather than dissolved chemicals. Their size, shape, polymer type, and surface characteristics can vary […]

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Nitrites in Drinking Water: Health Risks, EPA Limits, Testing & Filtration

Nitrites in drinking water and reverse osmosis filtration

Nitrite is a nitrogen-containing chemical that can occur naturally in the environment but is more commonly associated with fertilizer runoff, wastewater, septic systems, animal waste, and the biological conversion of nitrogen compounds. Although nitrite and nitrate are closely related, they are not the same chemical. Both are regulated in drinking water because elevated concentrations can […]

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