TABLE 1—
The 17 Indicators of Cumulative Environmental Health Impact Included in CalEnviroScreen 1.1: California
| Indicator | Description | Source | Range | Mean ±SD | Median |
| Pollution burden | |||||
| Ozone (ppm) | Portion of the daily maximum 8-h ambient concentration over the federal standard (2007–2009) | CARB | 0.0–1.3 | 0.1 ±0.2 | 0.1 |
| PM 2.5 (µg/m3) | Annual mean ambient concentration (2007–2009) | CARB | 3.6–21.2 | 10.5 ±3.1 | 10.2 |
| Diesel PM (kg/d) | Emissions from on-road and nonroad sources for a 2010 summer day in July | CARB | 0.1–125.3 | 10.3 ±14.3 | 4.6 |
| Pesticide use (lb/square mile) | Selective active ingredients used in production agriculture (2009–2010) | California Department of Pesticide Regulation | 0.0–32 671.0 | 344.0 ±1975.0 | 0.1 |
| Toxic releases (toxicity-weighted lb/y) | Releases to air or water (2008–2010) | Toxics Release Inventory, US Environmental Protection Agency | 0.0–5.1 × 108 | 1.73 × 106 ±1.74 × 107 | 0.0 |
| Traffic density (vehicle-km per h/km) | Traffic volume by road length within 150 meters of zip code boundary (2004) | CEHTP, CDPH | 0.0–8 417.0 | 916.0 ±892.0 | 665.2 |
| Cleanup sites (weighted sum) | Cleanup sites weighted by site type and status (2013) | DTSC EnviroStor database | 0.0–511.0 | 24.5 ±46.6 | 8.0 |
| Groundwater threats (weighted sum) | Potential contamination sources and monitoring wells, weighted by site type and status (2013) | SWRCB GeoTracker database | 0.0–4 530.0 | 87.7 ±231.0 | 32.0 |
| Hazardous waste (weighted sum) | Permitted hazardous waste facilities and generators, weighted by waste type and volume (2013) | DTSC EnviroStor database | 0.0–58.8 | 2.2 ±4.0 | 0.8 |
| Impaired water bodies (sum of pollutants) | Number of pollutants across water bodies designated as impaired (2010) | SWRCB 303(d) List of Impaired Water Bodies | 0.0–32.0 | 4.0 ±4.9 | 2.0 |
| Solid waste (weighted sum) | Solid waste facilities, operations, and disposal sites, weighted by site type and status (2013) | SWIS and CIA Disposal Sites Program, Department of Resources, Recycling and Recovery | 0.0–57.0 | 4.7 ±6.4 | 2.0 |
| Vulnerable populations | |||||
| Children and elderly (%) | % population aged < 10 y or > 65 y (2010) | US Census Bureau | 0.0–100.0 | 25.9 ±6.5 | 25.6 |
| Asthma (visits per 10 000/y) | Spatially modeled, age-adjusted rate of emergency department visits (2007–2009) | CEHTP, Office of Statewide Health Planning and Development | 6.9–312.2 | 42.5 ±27.0 | 36.1 |
| Low birth weight (%) | % births weighing < 2500 g (2007–2011) | CDPH Vital Statistics | 1.0–14.8 | 6.7 ±1.4 | 6.6 |
| Educational attainment (%) | % population aged > 25 y with < high school education (2007–2011) | ACS 5-y estimates, US Census Bureau | 0.0–82.7 | 17.3 ±14.8 | 13.0 |
| Linguistic isolation (%) | % households in which no one aged ≥ 14 y speaks English “very well” (2007–2011) | ACS 5-y estimates | 0.0–100.0 | 10.4 ±10.3 | 7.4 |
| Poverty (%) | % population living below twice the federal poverty level (2007–2011) | ACS 5-y estimates | 0.0–96.6 | 33.8 ±17.8 | 31.6 |
Note. ACS = American Community Survey; CARB = California Air Resources Board; CDPH = California Department of Public Health; CEHTP = California Environmental Health Tracking Program; CIA = Closed, Illegal, and Abandoned; DTSC = Department of Toxic Substances Control; PM = particulate matter; SWIS = Solid Waste Information System; SWRCB = State Water Resources Control Board.