Community Life
Days with Good Air Quality


Days with Good Air Quality

What does this measure?

The percentage of days for which air quality was monitored and found to be good, indicating healthy air both for sensitive groups, such as people with asthma, and for the population as a whole. The Air Quality Index (AQI) summarizes levels of ground-level ozone, particulate matter (soot and other particles), carbon monoxide, sulfur dioxide, and nitrogen dioxide into one measure.

Why is this important?

Exposure to these pollutants can cause short-term health effects such as irritation to the eyes, nose and throat, coughing, sneezing, runny nose, and shortness of breath. Continued exposure can also worsen medical conditions such as asthma and heart disease.

How is our county doing?

In 2017, 88% of days with air quality measurements in Essex County were good air days, similar to the rate in 2016, and a 20 percentage point increase from 2000.

How do we compare to similar counties?

Middlesex, MA had the highest percentage of good air days in 2017, at 96%. Lake, IL Was on par with Essex County while Westchester, NY was higher at 90%. Since 2000, each county has had an increase in the number of good air days.

Notes about the data

Comparable national and state data is not available due to the quantity and location of EPA monitoring stations. Data for this indicator are expected to be released annually in July.

Days with Good Air Quality
200020012002200320042005200620072008200920102011201220132014201520162017
Essex County, MA68%74%73%80%75%65%70%63%67%76%72%68%74%76%83%82%88%88%
Middlesex County, MA75%76%80%93%92%86%83%83%88%90%87%92%90%94%95%95%94%96%
Lake County, IL80%77%74%84%87%76%86%79%84%87%82%88%82%87%89%92%88%88%
Westchester County, NY81%71%75%81%85%75%79%66%71%77%74%73%80%82%82%79%82%90%

Source: U.S. Environmental Protection Agency
Notes: Data were not available for the state or for some counties because they do not have air quality monitoring stations.




Number of Days with Good Air Quality
200020012002200320042005200620072008200920102011201220132014201520162017
Essex County, MA250270265293274239254229247276262248270276304299321321
Middlesex County, MA271277291336335311304302321330318334328335338345341341
Lake County, IL291280270308318278313287309308299316296305317332306316
Westchester County, NY287257261291298272274239260280271263292300299290300327

Source: U.S. Environmental Protection Agency
Notes: Data were not available for the state or for some counties because they do not have air quality monitoring stations.




INDICATORS TREND | ESSEX COUNTY
Early Prenatal Care by Mother's Race/Ethnicity Not Applicable
Preterm Births Increasing
Infant Mortality Rate Maintaining
Children with Elevated Blood Lead Levels Decreasing
Children Living in Poverty Increasing
Children Living in Poverty by Race/Ethnicity Not Applicable
Child Abuse and Neglect Increasing
Disengaged Youth Decreasing
Live Births to Teen Mothers Decreasing
Youth Arrests Decreasing
Arts, Entertainment and Recreation Establishments Maintaining
Arts, Entertainment and Recreation Employment Maintaining
Tourism Spending Maintaining
Voter Participation Rate Increasing
Charitable Contributions Maintaining
Protected Land Not Applicable
Days with Good Air Quality Increasing
Beach Contamination Decreasing
Daily Water Use per Resident Decreasing
Crimes Against People Increasing
Crimes Against Property Increasing
Drug-Related Arrests Maintaining
Reports of Domestic Violence Increasing
Incarceration Rates Decreasing
Recidivism Decreasing
Households Without Vehicles Maintaining
Means of Transportation to Work Not Applicable
Traffic Injuries and Fatalities Maintaining
Households With Internet Access Increasing
Change in Total Population Increasing
Change in Population by Age/Gender Not Applicable
People 65 or Older Living Alone Decreasing
People with Disabilities Increasing
Households by Type Not Applicable
Single-Parent Families by Gender Not Applicable
Single-Parent Families by Race/Ethnicity Not Applicable
Change in Population by Race/Ethnicity Not Applicable
Foreign-Born Population Increasing
Language Diversity Increasing
Change in Total Jobs Increasing
Change in Jobs by Sector Not Applicable
Change in Average Salary Increasing
Change in Average Salary by Sector Not Applicable
Average Salary by Sector Not Applicable
Median Earnings by Occupation by Gender Not Applicable
People Entering/Leaving County for Work Not Applicable
Employer Size Not Applicable
Self-Employment Revenue Maintaining
Unemployment Rate Increasing
Unemployment Rate by Race/Ethnicity Not Applicable
Prekindergarten Participation Not Applicable
Female Enrollment in School Not Applicable
Chronically Absent Students Increasing
Per-Student Spending Maintaining
Bullying Maintaining
Student Performance on Grade 3 Reading Not Applicable
Student Performance on Grade 8 Math by Student Group Not Applicable
Student Performance on Grade 10 English Language Arts Not Applicable
Student Performance on Grade 10 Math Not Applicable
High School Cohort Graduation Rate Increasing
High School Cohort Graduation Rate by Student Group Not Applicable
Education Levels of Adults Not Applicable
Bachelor's Degree or Higher by Race/Ethnicity Not Applicable
Income in Relation to Poverty Level Not Applicable
People Living in Poverty by Race/Ethnicity Not Applicable
Median Household Income Maintaining
Median Household Income by Race/Ethnicity Not Applicable
Median Household Income by Household Type Not Applicable
Living Wage Rate by Household Type Not Applicable
Households Receiving Temporary Assistance Maintaining
Households Receiving Federal Food Assistance Increasing
Participation in Food Assistance by Race/Ethnicity Not Applicable
Earned Income Tax Credit Participation Maintaining
Economically Disadvantaged Students Increasing
Median Home Value Maintaining
Housing Affordability for Homeowners Increasing
Housing Affordability for Renters Increasing
Homeownership Rates Maintaining
Homeownership Rates by Race/Ethnicity Not Applicable
Homeless Persons Increasing
People Without Health Insurance Decreasing
Medical Care Expenses Maintaining
Prevalence of Children with Asthma Maintaining
Prevalence of Overweight Children Decreasing
Prevalence of Overweight Adults Not Applicable
Diabetes Incidence Decreasing
Chronic Disease Among Older Adults Increasing
Cancer Incidence Decreasing
Cancer Mortality Rate Decreasing
Heart Disease Mortality Rate Decreasing
Mortality Rate Decreasing
People who Smoke Not Applicable
Use of Illegal Drugs Not Applicable
Youth Use of Illegal Drugs Not Applicable
Substance Abuse Treatment Admissions Not Applicable
Drug Overdose Mortality Rate Increasing
Prevalence of Mental Illness Maintaining
Suicide Rate Maintaining