EJ Screen Lead Paint Exposure

The lead paint indicator is the percentage of occupied housing units built before 1960, calculated from
the U.S. Census Bureau’s ACS 5-year summary estimates on age of housing stock. EJScreen uses age of
housing stock as a surrogate for potential lead exposure as regulations banning lead-based residential
paint in 1978 led to the reduction and finally an end to the use of such paint in housing. The percentage
of older housing units is a proxy for potential exposure to lead paint and lead-containing dust that
accumulates indoors, in homes, or in other buildings where lead paint was used. EJScreen uses housing
units built before 1960.

Influenza Vaccination by County, Adult (2021)

This layer displays immunization rates for seasonal influenza among adults aged 18 and older. Data are from the Centers for Disease Control and Prevention (CDC) FluVaxView data portal. The county-level estimates within FluVaxView are derived from responses to the 2021 BRFSS.

EJ Screen Air Toxic Respiratory Risk

The air toxics respiratory HI indicator is the respiratory HI from the analyzed carcinogens in ambient
outdoor air, as provided by the 2017 Air Toxics Data Update. The data is reported at the Census tract
level. Block group level values are assigned by repeating each parent tract level value.

Influenza Vaccination by Vaccination Setting (Non-Medical Setting)

This layer displays the proportion of the county population immunized for influenza aged 18 years or older who have received the vaccination in a non-medical setting. Data are from the Centers for Disease Control and Prevention (CDC) FluVaxView data portal. The county-level estimates within FluVaxView are derived from responses to the 2021 BRFSS.

EJ Screen Superfund Proximity

The Superfund proximity indicator is reflective of the total count of sites proposed and listed (final) on
the National Priorities List (NPL) in each block group within 5 km of the average resident in a block
group, divided by distance, calculated as the population-weighted average of blocks in each block group.