Insights: Bakersfield, CA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 70 over 365 measured days in 2025, which corresponds to a Moderate band and a Very Poor metro-wide health grade. The monitored-day split lands at 64 Good days (18%), 236 Moderate (65%), and 61 Unhealthy-for-Sensitive-Groups (17%). The 90th-percentile AQI finished at 112 while the highest single-day reading hit 200 (Unhealthy). Metro residents averaged roughly 5.3 clean-air days per 30-day window across the reporting year.

Across the 2020–2025 trend window, the share of monitored days rated Good shifted by -0.2 points (measured against 264 monitored days in 2020 and 304 in 2025, so raw day counts are not comparable) and the median AQI moved -13 points, which classifies the multi-year trajectory as improving. The annual record contains 4 days at Unhealthy or worse. On those days, the EPA recommends that sensitive groups limit prolonged outdoor exertion. Metros with comparable AQI profiles include El Paso, TX (18.1% good, AQI 70); San Diego-Carlsbad, CA (17.5% good, AQI 67); Los Angeles-Long Beach-Anaheim, CA (10.7% good, AQI 74).