Radiation in tap water

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States Affected
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People Affected
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Toxicity Rating
Health Effects

Increased cancer risk, kidney toxicity

The legal limit is
Health Guideline
what is considered unhealthy
Legal Limit
What is radiation?
Radiation is the emission of energy that can affect the molecular structure of organisms. Radiation is released by a group of naturally occurring elements, including uranium, radium, strontium, plutonium, cesium, and thorium. More than 12 different radioactive elements have been found in U.S. tap water, but they can’t be seen, smelled, or tasted.
Is radiation in my tap water?
Radiation may exist in tap water as a result of the natural erosion of radioactive mineral deposits in the earth or from nuclear power plants that can release radiation. These elements can also be disrupted by human activities, such as mining, drilling, and fracking.
Is radiation in my tap water harmful?
The EPA has declared that all ionizing radiation causes cancer. This is typically at higher exposure levels, but any exposure at all is harmful. Fetuses and small children are particularly vulnerable to the effects of radiation exposure.
How much radiation is safe?
No amount of radiation is safe. However, very small amounts of radioactive elements are legal.1 Removing all traces of radiation is very difficult and expensive for public water systems to achieve. Some states feel the federal limits are too high and set their own stricter guidelines for radiation exposure. For example, California has set public health goals for radium-226, radium-228, and uranium that are more than 50 times lower than what the federal government allows.2 But even in these states, some amount of radiation is allowed in the water.
How do I remove radiation from my tap water?
Clearly Filtered® with Affinity® Filtration Technology gives you the power to remove up to 99.9% of the most common radioactive elements from your tap water, giving you peace of mind that comes from knowing your drinking water is finally clean and safe. Basic water filters that rely on simple carbon or charcoal are only effective at removing unpleasant odors and taste. These filters are not capable of stopping radiation and instead allow it to pass right through the filter into the water you're drinking. More sophisticated technology like Clearly Filtered is required to provide this type of contaminant removal.
How does Clearly Filtered do at Removing Radiation in tap water?
Clearly Filtered with
Affinity Filtration Technology Product
Water Pitcher Filter
Under-the-Sink FIlter
Water Bottle Filter
Refrigerator Filter
Radiation in tap water Removal
Up to 99.5%
Up to 99.5%

1. 170 million in U.S. drink radioactive tap water. Environmental Working Group. (2018, January 11). Accessed August 29, 2022, from https://www.ewg.org/research/170-million-us-drink-radioactive-tap-water

2. Environmental Protection Agency. (2021, December 1). Radionuclides Rule. EPA. Accessed August 29, 2022, from https://www.epa.gov/dwreginfo/radionuclides-rule
3. US EPA. National primary Drinking Water Regulations. https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations. Accessed August 25, 2019.

4. California Office of Environmental Health Hazard Assessment. Public Health Goals (PHGs). https://oehha.ca.gov/water/public-health-goals-phgs. Accessed August 25, 2019.