Uranium in Drinking Water

🩨 Health Effects

Uranium causes kidney toxicity and increases cancer risk with long-term exposure. It is both a chemical toxin (damaging kidneys) and a source of radiation (alpha particle emission). The MCL was set primarily based on kidney toxicity.

📍 Sources in Water

Uranium occurs naturally in certain rock and soil formations and dissolves into groundwater. Most common in the West (Colorado, Wyoming, South Dakota), New England, and parts of the Midwest.

✅ What To Do

Reverse osmosis and ion exchange are effective at reducing uranium. If your community system has violations, contact your utility. Private well users in uranium-prone areas should test their water.

📜 Regulation History

The EPA finalized the uranium MCL at 0.030 mg/L (30 ppb) in December 2000 under the Radionuclides Rule, with compliance required by December 2007. The standard was based on kidney toxicity rather than cancer risk from radiation. The WHO guideline is 0.030 mg/L, matching the US standard.

🔬 How To Test Your Water

Certified lab tests for uranium cost $25-$50 and provide results in 1-2 weeks. Home test kits for uranium are not readily available; lab analysis is recommended. Private well owners in uranium-prone geological areas (granite, sandstone formations) should test their water every 3-5 years.

💧 Which Filters Remove Uranium?

Strong-base anion exchange resins are highly effective at removing uranium (90%+). Reverse osmosis (NSF/ANSI 58 certified) also removes uranium effectively. Distillation works as well. Standard carbon filters are not effective against uranium. Look for systems specifically tested for uranium reduction.

🔗 Related Contaminants