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Contaminant Guide

Radium in Your Drinking Water

Radium is a naturally occurring radioactive element found in groundwater across SC and NC. Long-term exposure is linked to bone cancer and leukemia.

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Key Facts

  • EPA maximum contaminant level: 5 pCi/L (combined Ra-226/228)
  • Radium is naturally present in SC and NC's Piedmont and coastal plain geology
  • Radium has no taste, color, or odor
  • Ion exchange (water softeners) and reverse osmosis remove radium
  • Radium is a known human carcinogen (Group 1, IARC)

The Solution

Ion exchange (water softeners) and reverse osmosis are effective radium removal methods. ClearFlow tests for radium and installs the appropriate system based on your water's specific radium isotope profile.

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Frequently asked questions

Is radium found in SC and NC water?

Yes. Radium occurs naturally in the granite and metamorphic rock of the SC and NC Piedmont and in certain coastal plain aquifers. Private well owners in these areas face the highest risk.

What are the health effects of radium in water?

The EPA regulates radium at 5 pCi/L because long-term ingestion above that level is associated with increased cancer risk. Radium is classified by the IARC as a Group 1 human carcinogen.

Can I detect radium in my water at home?

No — radium is colorless, odorless, and tasteless. Laboratory-quality testing is required. ClearFlow's free in-home test can identify radium concerns.

What removes radium from drinking water?

Ion exchange (traditional water softeners) and reverse osmosis both effectively remove radium. The right choice depends on your overall water chemistry.

How do I get tested for radium in my water?

Call ClearFlow at (843) 742-1196 to schedule a free in-home water test. We can include radium in our comprehensive panel.

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Your answers.
Your free test.

  • In-home testing
  • A report that’s yours to keep
  • No obligation to buy a system

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What happens next

  1. We call you to set a time that suits you.
  2. A local specialist tests your water at your kitchen tap.
  3. You keep the written report. No obligation.

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