Distribution of airborne radon-222 concentrations in U.S. homes.

  title={Distribution of airborne radon-222 concentrations in U.S. homes.},
  author={Anthony V. Nero and Martin Schwehr and William W. Nazaroff and Kenneth L. Revzan},
  volume={234 4779},
Apparently large exposures of the general public to the radioactive decay products of radon-222 present in indoor air have led to systematical appraisal of monitoring data from U.S. single-family homes; several ways of aggregating data were used that take into account differences in sample selection and season of measurements. The resulting distribution of annual-average radon-222 concentrations can be characterized by an arithmetic mean of 1.5 picocurie per liter (55 becquerels per cubic meter… 


  • Nero
  • Environmental Science
  • 1986
Recent analyses now permit direct estimation of the risks of lung cancer from radon decay products in US homes. Analysis of data from indoor monitoring in single-family homes yields a tentative


One of the least understood qualities of radon and its associated risk is the relationship between its concentration at the source and the statistical distribution of concentrations found in indoor

Characterizing the occurrence, sources, and variability of radon in Pacific Northwest homes.

In high Radon homes, winter indoor levels averaged 13 times higher than summer concentrations, while in low radon homes winter levels averaged only 2.5 times higher.

Indoor Radon Levels and Lung Cancer Incidence on Guam

Evaluation of indoor radon measurements in Hungary.

Relationship among short- and long-term radon measurements within dwellings: influence of radon concentrations.

Observations from a retrospective epidemiologic study of lung cancer in women in New Jersey may have important implications for procedures and decision strategies designed to reduce individual and population exposures to radon.


Although elevated indoor radon concentration can occur almost anywhere, some areas of the U.S. have a much higher fraction of homes with elevated levels than do other areas. Knowledge of what areas

Effect of Activity Patterns on Radon Exposure

An important goal of those concerned with air pollution is to estimate the time-weighted average exposure to various indoor air pollutants. Various studies have measured the concentration of



Indoor radon levels in the northeastern U.S.: effects of energy-efficiency in homes.

The expectation of elevated 222Rn levels in modern homes that have low air interchange rates with the out-of-doors caused us to survey both solar and conventional homes in northeastern New York State, and the track etching technique is ideally suited for year-round measurements.

Time-averaged indoor Rn concentrations and infiltration rates sampled in four U.S. cities.

Differences in Rn entry rates among houses appear to be more important than differences in infiltration rates in determining whether a house has high indoor Rn levels, consistent with previous indications from grab-sample measurements.

Survey of one-year average Rn levels in Pittsburgh area homes.

  • B. Cohen
  • Environmental Science
    Health physics
  • 1985
There was little correlation between Rn concentration and age of the house, indicating that Rn exposures may not have changed appreciably during the past 50 yr; this is important for estimating risks of Rn-induced lung cancer.

Indoor radon measurements in New Jersey, New York and Pennsylvania.

The distribution of 222Rn concentrations in 33 buildings near Canonsburg, PA, Lewiston, NY and Middlesex, NJ was investigated over a 2-yr period, but in only one building did the annual radon concentration exceed the U.S. Nuclear Regulatory Commission's limit of 3pCi/l.

Radon concentrations and infiltration rates measured in conventional and energy-efficient houses.

It appears that the major cause of the observed differences in222Rn concentration is variation from one house to another in the rate at which 222Rn enters houses from its sources.

Automated system for measuring air-exchange rate and radon concentration in houses.

An automated system for continuously measuring the air-exchange rate and 222Rn (radon) concentration in an occupied residence permits the effective radon source magnitude to be calculated as a function of time.

Background atmospheric 222Rn concentrations outdoors and indoors: a review.

  • T. Gesell
  • Environmental Science
    Health physics
  • 1983
Indoor atmospheric radon concentrations are found to vary with time of day, geographic location and story above ground, and it is estimated that the mean value for normal areas of the contiguous United States lies in the range of 100-400 pCi/m3 and is probably about 250 pCis3.

Health effects guidance for uranium in drinking water.

The interim regulations for radioactivity in drinking water were promulgated in 1976 (Federal Register, Friday, 9 July, 1976, p. 28402). These regulations specifically excluded uranium because of

Radon entry into houses having a crawl space.

Results suggest that Rn transport into the crawl space of at least 1 of the houses occurred by pressure-driven flow, rather than solely by molecular diffusion.

Field and laboratory tests of etched track detectors for 222Rn: summer-vs-winter variations and tightness effects in Maine houses.

Effects of tightness of homes and of bedrock character on indoor 222Rn concentrations were sought in 70 homes in the state of Maine by means of four 6- to 8-month-long surveys over a 1.5-yr period, implying that surveys of individual homes require a full year of monitoring.