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AQI Breakpoints
Category Value Ozone(ppm), 8/hr Carbon Monoxide (ppm), 8/hr Sulfur Dioxide (ppm), 24/hr Fine Particles, (µg/m3), 24/hr
Good 0–50 0.000–0.059 0.0–4.4 0.000–0.034 0.0–15.4

Moderate

51–100 0.060–0.075 4.5–9.4 0.035–0.144 15.5–40.4

Unhealthy for Sensitive Groups

101–150 0.076–0.095 9.5–12.4 0.145–0.224 40.5-65.4

Unhealthy

151–200 0.096–0.115 12.5–15.4 0.225–0.304 65.5–150.4

Very Unhealthy

201–300 0.116–0.374 15.5–30.4 0.305–0.604 150.5–250.4
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