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Radiological

Radium (combined -226 & -228) in your water

Is Radium (combined -226 & -228) in drinking water dangerous?

It depends on the level and how long you're exposed. The EPA legal limit (MCL) for Radium (combined -226 & -228) is 5 pCi/L. Meeting the legal limit isn't the same as zero risk — test your water to know your level.

How do you remove Radium (combined -226 & -228) from water?

Radium (combined -226 & -228) is treated by Water Softener and Reverse Osmosis. Choose a system independently certified to NSF/ANSI standards to reduce Radium (combined -226 & -228), and test your water first to confirm the level.

Source: EPA MCL / MCLG; WHO guidelines; NSF/ANSI · 2026

Health effects

Radium is a naturally radioactive element that leaches from rock into groundwater. Long-term exposure increases the risk of bone cancer and other cancers because it concentrates in bone. The federal limit covers the combined activity of radium-226 and radium-228.

The health-based goal vs. the legal limit

The federal legal limit (MCL) is the maximum allowed by law. The EPA health goal (MCLG) is the level below which no health risk is expected — it is non-enforceable and often stricter than the legal limit.

EPA health goal (MCLG)

No federal health goal set

Federal legal limit (MCL)

5 pCi/L

Source: EPA National Primary Drinking Water Regulations (MCL / MCLG) · 2026

What removes Radium (combined -226 & -228)

ROion-exchange

Where Radium (combined -226 & -228) has been found

Radium (combined -226 & -228) shows up in the public water record for these cities. Each page has the measured level, the legal limit, and what removes it.

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Is Radium (combined -226 & -228) in your water?

Check your city's public record, then book a free 30-minute test to confirm what's in your home.