pCi

My brother in law and his wife in Portland found that they were in an area called "radon ridge" by real-estate salespeople, and had a count of 60 pCi/L (picocuries per liter of air) in the basement.

Passive Aggressive: “Passive” Home Construction Comes to Seattle « PubliCola 2010

We had our basement in Seattle tested right after, and were already at 0.4 pCi/L. Building tightly sealed houses has been seen as a danger in recent years, I thought, even with super-green materials that omit formaldehyde, and off-gas relatively little.

Passive Aggressive: “Passive” Home Construction Comes to Seattle « PubliCola 2010

They had a small amount of piping and fan installed and got the number down to 0.4 pCi/L.

Passive Aggressive: “Passive” Home Construction Comes to Seattle « PubliCola 2010

Here are four things the EPA recommends to keep your family safe: • Start with a short-term test: Radon is measured in picocuries per liter pCi/L; 1.3 is considered the national average indoor level.

National Radon Action Month: How to detect a deadly threat 2010

Since radon levels can vary with the seasons and home usage patterns, the EPA suggests following up an initial reading of between 2 and 4 pCi/L with a longer-term test kit CR recommends the Accustar Alpha Track Test Kit AT 100, $28.

National Radon Action Month: How to detect a deadly threat 2010

(The EPA also suggests that you consider remediation at a level between 2 and 4 pCi/L.)

Weekend Project: Avoid these dangers lurking inside your home 2010

If a test indicates radon level higher than the recommended federal action level of 4 picocuries per liter (pCi/L), consult a professional to confirm the results.

Weekend Project: Avoid these dangers lurking inside your home 2010

If a test indicates radon level higher than the recommended federal action level of 4 picocuries per liter pCi/L, consult a professional to confirm the results.

Weekend Project: Avoid these dangers lurking inside your home 2010

Radon-remediation systems will vary depending on a home's structure, but a system that will cut the level to 2 pCi/L or lower costs about $1,200 for the average house.

National Radon Action Month: How to detect a deadly threat 2010

Although 4 pCi/L is the recommended EPA action level, the agency also suggests that you consider remediation at a level between 2 and 4 pCi/L.

National Radon Action Month: How to detect a deadly threat 2010