AARP Livability IndexGreat Neighborhoods for All Ages

Percentage of the population getting water from public water systems with at least one health-based violation during the past year: measured at the county scale, lower values are better

We need water to survive, so it’s only natural that livable communities provide residents with clean drinking water. Contaminated drinking water can cause severe health issues; it also may reflect infrastructure that can’t support future growth. More than 20 percent of the nation’s water systems have violated health standards in recent years, which is why the Index investigates the percentage of people in a county who get water from public systems that fall below health standards. 

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Number of days per year when regional air quality is unhealthy for sensitive populations: measured at the county scale, lower values are better

Poor air quality not only makes day-to-day life less enjoyable, but also poses long-term health threats, especially for young people, older adults, and people who are at risk of developing asthma and other respiratory diseases. The Air Quality Index (AQI) measures the level of several different air pollutants on a scale of 0 to 500. An AQI of 101 or higher is considered unhealthy for sensitive populations. The Index measures the number of days per year when a county’s AQI score is 101 or higher, using 3 years of data and controlling for year-to-year changes in the weather. For areas that don’t report air quality data, we assume the national average. 

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Percentage of the population living within 200 meters of a high-traffic road with more than 25,000 vehicles per day: measured at the neighborhood scale, lower values are better

A high-traffic road isn’t just a nuisance to navigate, it can be a threat to public health, too. People who live near these roads are exposed to stressful noise pollution, not to mention exhaust and other emissions that can increase the risk of cancer and asthma. Busy roads also create barriers for pedestrians and bicyclists. The Index measures the percentage of people in a neighborhood who live close enough to high-traffic roads that they are regularly exposed to these negative impacts.

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Toxicity of airborne chemicals released from nearby industrial facilities: measured at the neighborhood scale from 0 to 311,000, lower values are better

Industrial facilities emit a wide range of pollutants that taint the local air and damage the health and quality of life for nearby residents—especially older adults, children, and those who have difficulty breathing. The Index assesses health impacts from all major industrial pollution sources within 1,000 feet of a neighborhood using a tool that measures relative health risks from different pollutants. More than 90 percent of U.S. neighborhoods have no local industrial pollution, so even communities with trace amounts of pollution score poorly on this metric. Any local pollution should be cause for concern, though some toxins have large weighting in the source data and can lead to large variations from year to year. Note that values shown are for display purposes and may appear in source data at different scales from year to year though metric change is calculated on re-scaled data for comparability.

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State date-based policies prohibiting disconnection of utility service 
 In communities with harsh and unpredictable climates, reliable utilities are a must, especially for older adults. Even if customers are behind on their payments, supportive communities don’t disconnect key utilities during periods of exceptionally hot or cold weather. Here, the Livability Index awards credits to states with policies that prevent utilities from stopping service to any customer during seasons when extreme weather is likely.

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Approved local multi-hazard mitigation plans

While communities can’t prevent emergencies from happening, they can prepare for the worst to protect residents. The Federal Emergency Management Agency (FEMA) pushes local government to develop mitigation plans that identify stakeholders, risks, and potential responses for a range of hazards like floods, tornadoes, and wildfires. Here, the Index gives credit to communities with up-to-date, FEMA-approved, multi-hazard mitigation plans.

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State policies that support energy-efficient buildings, facilities, and appliances

Energy efficiency initiatives protect the environment by minimizing pollution from fossil fuels. Green options like energy-optimized homes, appliances, and vehicles can also save people money on gas and electric bills. The American Council for an Energy-Efficient Economy (ACEEE) ranks states based on a range of energy-efficient programs and policies, and the Index awards credit to states that fall in the top quarter of ACEEE’s rankings. 

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Communities that have taken comprehensive steps to prepare for the aging of the U.S. population

By 2030, there will be twice as many Americans over the age of 65 as there were in 2000. To help residents live comfortably in all stages of life, communities must provide opportunities like convenient transportation, walkable neighborhoods, affordable and accessible housing, multi-generational social opportunities, and inclusive business practices—just to name a few. To guide communities toward making these forward-thinking changes, several organizations have also established peer-learning networks and identified processes to help make communities age-friendly. The Index gives credit to states, metropolitan areas, counties, and cities that are part of the AARP Network of Age-Friendly States and Communities or recipients of Grantmakers in Aging Community AGEnda grants. In the future, the Index may award communities that participate in other age-friendly initiatives.

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