PM 2.5 levels in air measured using an annual average.
Ozone annual mean top 10 of daily maximum 8-hour concentration in air.
Average annual nitrogen dioxide (NO2) levels expressed as part per billion (by volume).
Diesel PM level in air.
Risk-Screening Environmental Indicators (RSEI) modeled toxicity-weighted concentrations in air of Toxics Release Inventory (TRI) Program listed chemicals.
Count of vehicles (annual average daily traffic (AADT)) at major roads within 10 kilometers (km), divided by distance in km.
Percent of housing units built before 1960.
Count of Superfund sites (proposed and final NPL sites and SAA sites) within 10 km, each divided by distance in km.
Count of RMP (potential chemical accident management plan) facilities within 10 km, each divided by distance in km.
Count of hazardous waste management facilities (Treatment, Storage, and Disposal Facilities (TSDFs) and Large Quantity Generators (LQGs)) within 10 km, each divided by distance in km.
Count of LUSTs (multiplied by a factor of 7.7) and the number of USTs within a 1,500 foot buffered block group.
RSEI modeled toxicity-weighted concentrations of TRI listed chemicals in water stream segments within 500 meters, divided by distance in km.
Score based on number of Safe Drinking Water Act violations not returned to compliance that community water systems have received over the past five years; violations are weighted based age and severity.