What is a picocurie? A picocurie is a unit of measurement of radioactivity, equal to the amount of a radioactive isotope that decays at the rate of 3.7 × 10=101disintegrations per second. It was named after Marie Curie, a Polish born chemist who shared the Nobel Prize in 1903 with her husband Pierre Curie and Henri Becquerel for their collaborative research on radioactivity. In addition, Madame Curie won a second Nobel Prize in 1911 for her discovery and study of radium and polonium now found in the periodic table of chemical elements. 

Essex County Radon Pie Chart
Green Results under 2 pCi/L
Yellow  Results between 2 and 3.9 pCi/L
red  Results 4 pCi/L and above
Essex County Map

Radon information source: Massachusetts Health and Human Services