Insights: Bishop, CA metro. Aggregated EPA AQS monitors across this Core-Based Statistical Area logged a median Air Quality Index of 55 over 365 measured days in 2025, which corresponds to a Moderate band and a Poor metro-wide health grade. The monitored-day split lands at 136 Good days (37%), 216 Moderate (59%), and 9 Unhealthy-for-Sensitive-Groups (2%). The 90th-percentile AQI finished at 81 while the highest single-day reading hit 411 (Hazardous). Metro residents averaged roughly 11.2 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 -9.8 points (measured against 327 monitored days in 2020 and 353 in 2025, so raw day counts are not comparable) and the median AQI moved -2 points, which classifies the multi-year trajectory as worsening. 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 Little Rock-North Little Rock-Conway, AR (31.2% good, AQI 55); Sacramento--Roseville--Arden-Arcade, CA (35.3% good, AQI 55); Baton Rouge, LA (35.6% good, AQI 54).