Radionuclide Medium Risk
Radium-226
Increased risk of cancer
Sources: Natural deposits
Regulatory Limit
Zero EPA Limit (5 pCi/L)
*Levels above the EPA limit are considered unsafe.
MCL Value
5 pCi/L
Goal (MCLG)
0 pCi/L
Violating Systems
3 nationwide
Affected Population
1.0M estimated
Avg Detected Level
2.7753 pCi/L in affected systems
Health Risk Assessment
Exposure to Radium-226 in drinking water is regulated because of its potential to cause increased risk of cancer. The EPA has set the Maximum Contaminant Level (MCL) at 5 pCi/L to protect public health.
Note: Long-term exposure above the MCL can significantly increase health risks.
Detailed Health Effects
Increased risk of cancer
Common Sources
1
Natural deposits National Overview
Total Tests
61
Violations Found
3
Violation Rate
4.9%
Top States by Violations
Most Affected Systems
Treatment Methods
Ion exchange
Reverse osmosis
Lime softening
Is this in your water?
Find out if your local water system has detected Radium-226.
Frequently Asked Questions
What is Radium-226 and why is it in drinking water?
Radium-226 is a radionuclide contaminant. Common sources include: Natural deposits.
What are the health effects of Radium-226 in drinking water?
Increased risk of cancer
What is the EPA limit for Radium-226?
The EPA Maximum Contaminant Level (MCL) for Radium-226 is 5 pCi/L.
How can I remove Radium-226 from my water?
Effective treatment methods for removing Radium-226 include: Ion exchange, Reverse osmosis, Lime softening.
How do I test my water for Radium-226?
You can check your water system's annual Consumer Confidence Report for Radium-226 levels, or use a certified home water testing kit. WaterQ provides the latest EPA test data for all public water systems.