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2025 Hazard Mitigation Plan <br />Kittitas County, Washington <br /> <br /> <br />Chapter 4: Hazard Identification and Risk Assessment 189 <br />Figure 4-24. Kittitas County Wildfire Risk to Homes <br /> <br />4.6.9.3. Hazard Extent/Intensity <br />Wildfires are considered a natural and necessary component of wildland ecology. As a result, wildfires <br />are not considered a major hazard unless their movement threatens lives, homes, communities, critical <br />infrastructure, and natural and cultural resources. <br /> <br />Even if a wildfire is not occurring within Kittitas County, wildfire smoke can affect the visibility and air <br />quality of the region. The United States Environmental Protection Agency (EPA) use the Air Quality Index <br />(AQI) to report air quality. The AQI is divided into six (6) categories, listed in Table 4-140, each of which <br />corresponds to a different level of health concern. <br />Table 4-140. Air Quality Index for Ozone and Particulate Pollution <br />Daily AQI <br />Color <br />Levels of <br />Concern <br />Values of <br />Index Description of Air Quality <br />Green Good 0 to 50 Air quality is satisfactory, and air pollution poses little or <br />no risk. <br />Yellow Moderate 51 to 100 <br />Air quality is acceptable. However, there may be a risk <br />for some people, particularly those who are unusually <br />sensitive to air pollution.