SCORECARD CURRENTLY USES BOTH 1990 AND 2000 CENSUS DATA
Scorecard currently uses data from two different censuses. Environmental justice analyses utilize 1990 census data, because the environmental information Scorecard uses was compiled before the 2000 Census was publicly released. A single, consistent census dataset must be utilized for evaluating the distributional impacts of different environmental problems.
Data from the 2000 Census are being integrated into Scorecard incrementally, as Scorecard's different environmental data sources are updated. Census 2000 data are currently incorporated into Scorecard's hazardous air pollutant layer. Environmental justice analyses will be updated to 2000 once more of its constituent environmental data layers have been updated.
1990 census data were obtained directly from the U.S. Bureau of the Census .
2000 census data were obtained from Applied Geographic Solutions. AGS used the initial results of the 2000 Census plus additional demographic data sources to estimate 2001 values for all census parameters required by Scorecard. These data were acquired at the tract level for the universe of 1990 tracts as well as the universe of 2000 tracts. In some analyses (for example, hazardous air pollutant health risks), results based on 1990 tract boundaries have been spatially reapportioned to 2000 tracts.