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Table 1 Description of pollution indicators in CalEnviroScreen 2.0

From: Environmental pollution and social factors as contributors to preterm birth in Fresno County

  Indicators Description
  Pollution Burden Average of percentiles from Exposure and Environmental Effects indicators, with a half weighting for the Environmental Effects indicators)
Pollution Burden Exposures Ozone Amount of daily maximum 8-h Ozone concentration (ppm)
PM2.5 Annual mean particulate matter < 2.5 μm concentrations (μg/m3)
Diesel PM Diesel PM emissions from on-road and non-road sources (kg/day)
Pesticides Total pounds of selected active pesticide ingredients (filtered for hazard and volatility) used in production-agriculture per square mile in the census tract
Toxic Release Toxicity-weighted concentrations of modeled chemical releases to air from facility emissions and off-site incineration
Traffic Traffic density, in vehicle-kilometers per hour per road length, within 150 m of the census tract boundary
Individual Drinking Water Contaminants of Violation Measures Drinking Water Score Drinking water contaminant index for selected contaminants
Arsenic Arsenic average (ppb)
Cadmium Cadmium average (ppb)
DBCP 1,2-Dibromo-3-chloropropane average (ppb)
Lead Lead average (ppb)
Nitrate Nitrate (as NO3) average (ppm)
Perchlorate Perchlorate average (ppb)
TCE Trichloroethylene average (ppb)
TCP 1,2,3-trichloropropane average (ppb)
THM Total trihalomethane average (ppb)
Uranium Uranium average (PCI/L)
MCL Violations The total number of Maximum Contaminant Level (MCL) violations for any chemical by system from 2008 to 2012 population weighted to the census tract
TCR Violations Total coliform rule violations by system from 2008 to 2012 population weighted to the census tract
Environmental Effects Groundwater Threats Groundwater threats, sum of weighted GeoTracker leaking underground storage tank sites within buffered distances to populated blocks of census tracts
Hazardous Waste Sum of weighted hazardous waste facilities and large quantity generators within buffered distances to populated blocks of census tracts
Impaired Water Bodies Impaired water bodies, sum of number of pollutants across all impaired water bodies within buffered distances to populated blocks of census tracts
Solid Waste Sum of weighted solid waste sites and facilities within buffered distances to populated blocks of census tracts
Cleanup Sites Cleanup sites, sum of weighted EnviroStor cleanup sites within buffered distances to populated blocks of census tracts
Socioeconomic Factors Poverty Percent of population living below two times the federal poverty level
Unemployment Percent of the population over the age of 16 that is unemployed and eligible for the labor force
Housing Burden Percent housing burdened low income households
Linguistic Isolation Percent limited English speaking households