Washington Environmental Health Disparities Map

The Washington Environmental Health Disparities Map is an interactive mapping tool that compares communities across our state for environmental health disparities.

The map shows pollution measures such as diesel emissions and ozone, as well as proximity to hazardous waste sites. In addition, it displays measures like poverty and cardiovascular disease.

The map also provides new and rigorous insights into where public investments can be prioritized to buffer environmental health impacts on Washington's communities, so that everyone can benefit from clean air, clean water, and a healthy environment.

If you have questions about using the map or want to share how you are using the map, please contact us at EHDmap@doh.wa.gov.

View the Map

Environmental Health Disparities Map

How to Use the Map - Video


The map is displayed on WTN's Information by Location (IBL) tool. The data on the map include 19 indicators and are divided into four themes:

  • Environmental Exposures (PM2.5-diesel emissions; ozone concentration; PM2.5 Concentration; proximity to heavy traffic roadways; toxic release from facilities (RSEI model))
  • Environmental Effects (lead risk from housing; proximity to hazardous waste treatment, storage, and disposal facilities (TSDFs); proximity to National Priorities List sites (Superfund Sites); proximity to Risk Management Plan (RMP) facilities; wastewater discharge)
  • Sensitive Populations (death from cardiovascular disease; low birth weight)
  • Socioeconomic Factors (limited English; no high school diploma; poverty; race - people of color; transportation expense; unaffordable housing; unemployed)

The ranks for each census tract are calculated based on the 19 indicators. 

In addition to those indicators, the map also includes overlays. These are sets of information that are not used as part of the rank calculations. Overlay examples are locations of hospitals or hazardous waste sites. Currently there are over 30 overlays that can be selected to provide additional contextual information to the map.

Environmental health threats combined with population vulnerabilities combine to create risk for environmental health disparities

Looking at the 19 indicators together shows that living in areas with more environmental hazards and population vulnerabilities is associated with a shorter lifespan. The population in census tracts with the lowest environmental health disparities (rank 1) on average lived 5.3 years longer than those in census tracts with the highest environmental health disparities (rank 10).

Graph showing that life expectancy decreases with each increase in EHD rank


The map was a collaborative project that took several years to develop. It went live to the public in January of 2019.

Those involved in the initial collaboration include: University of Washington's Department of Environmental and Occupational Health Sciences, Front and Centered, Washington State Department of Health, Washington State Department of Ecology, and Puget Sound Clean Air Agency.

The effort included listening sessions with communities in Washington State. The communities gave input that informed development of the map.

Since the map was published, several laws and rules highlight it as a resource. Healthy Environment for All (HEAL) Act, passed in 2021, led to the first dedicated, ongoing state funding to maintain and update the map. The HEAL Act (RCW 43.70.815) requires DOH to:

  • Further develop the EHD map, engaging with communities, tribes, researcher, and EJ Council.
  • Track changes in disparities over time.
  • Perform a comprehensive evaluation every three years.
  • Expand online video trainings and guidance on how to use the EHD map.
  • Provide support and consultation to state agencies on how to use the EHD map.

DOH continues to add data to the EHD map to reflect additional health risks. DOH is currently working with partners to develop indicators for: wildfire smoke, asthma, tree canopy and greenspace, water quality, pesticide exposure, redlining index, and a group of climate change indicators.  

The EHD map is a living tool. Developing and improving it is an ongoing process, incorporating feedback and new data. The map will never fully reflect communities’ experiences and should not be used to replace community engagement or tribal consultation. If you have feedback about how we could improve the map, please contact us at EHDmap@doh.wa.gov

Timeline of the development of the Environmental Health Disparities map from 2016 to 2022

Learn about how the Environmental Health Disparities map is being used to support Washington's clean energy transformation.

Additional Resources

Environmental Health Disparities Map Flyer (PDF)

Environmental Health Disparities Map Version 2.0 Summary (PDF)

Environmental Health Disparities Map Version 2.0 Technical Report (PDF)

Front and Centered

University of Washington's Department of Environmental and Occupational Health Sciences

Contact Us

For information or questions related to the Washington Tracking Network, email DOH.WTN@doh.wa.gov.

Let Us Know How You Used the Data

We love hearing about how our data is being used to make an impact on the health of Washingtonians. It also helps us to know what is meeting our users’ needs and how we can improve the information we provide. If you used our data, please tell us about it by sending an email to DOH.WTN@doh.wa.gov.

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