Question 1

What is the EPA limit for gross alpha in drinking water?

Accepted Answer

The EPA Maximum Contaminant Level (MCL) for gross alpha is 15 pCi/L. Public water systems must keep gross alpha below this level.

Question 2

What are the health effects of gross alpha in drinking water?

Accepted Answer

Gross alpha particle activity is a screening measurement that detects alpha radiation from all radioactive elements in a water sample, including radium-226, uranium, radon, polonium, and thorium. The EPA MCL of 15 pCi/L (excluding radon and

Question 3

Where does gross alpha in drinking water come from?

Accepted Answer

Gross alpha activity in drinking water comes entirely from natural sources. Radioactive elements like radium, uranium, and thorium are present in rocks and soil throughout the US, with the highest concentrations in granitic bedrock (New Eng

Question 4

How do I remove gross alpha from my drinking water?

Accepted Answer

Gross Alpha is effectively removed by: Reverse Osmosis, Ion Exchange, Lime Softening. Look for NSF-certified filters that explicitly list gross alpha reduction.

Gross Alpha in Drinking Water - EPA MCL, Health Effects &