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Testing trends in environmental compliance
| Content Provider | Scilit |
|---|---|
| Author | Polansky, Alan M. Check, Catherine E. |
| Copyright Year | 2002 |
| Description | Journal: Journal of Agricultural, Biological and Environmental Statistics Many environmentalregulations are based on threshold levels. Such a level is generally set such that exposure to a toxin above the level is considered a hazard to health. In many instances, the level may be exceeded a certain number of times before regulatory action is taken. Such is the case with the National Ambient Air Quality Standards (NAAQS) set by the Environmental Protection Agency (EPA) in accordance with the 1990 amendment of the Clean Air Act of 1970. This set of standards sets threshold levels for several pollutants including carbon monoxide, nitrogen dioxide, ground-level ozone, and lead. Many areas of the United States, which the EPA designates as nonattainment areas, persistently exceed the air pollution levels set by the NAAQS. Progress in these areas is of ten slow but can be studied through data collected on the elapsed time between violations. The purpose of this article is to present a relatively easy but flexible statistical method for assessing whether an area is making progress with compliance to the NAAQS. The method presented in this article is based on a randomization test of a general model for the mean time between violations of the standard. The modeling-type approach of this method makes it flexible enough to study many types of trends. The use of the randomization test makes the method simple to apply and requires fewer assumptions than many other proposed methods. We discuss some general theoretical conditions for which the method is well suited and study the performance of this method empirically, Finally, we apply the method to a well-known set of interviolation times corresponding to data collected on ground-level ozone in Houston, Texas. |
| Related Links | http://link.springer.com/content/pdf/10.1198%2F108571102357.pdf |
| Ending Page | 468 |
| Page Count | 17 |
| Starting Page | 452 |
| ISSN | 10857117 |
| e-ISSN | 15372693 |
| DOI | 10.1198/108571102357 |
| Journal | Journal of Agricultural, Biological and Environmental Statistics |
| Issue Number | 3 |
| Volume Number | 7 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2002-09-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Agricultural, Biological and Environmental Statistics Environmental Engineering Threshold Levels Nitrogen Dioxide Carbon Monoxide |
| Content Type | Text |
| Subject | Applied Mathematics Statistics and Probability Environmental Science Agricultural and Biological Sciences Statistics, Probability and Uncertainty |
