Visalia Air Quality in 2023
In 2023, Visalia's air quality (Visalia-Porterville, CA area) had a median daily AQI of 69 (Moderate) across 365 monitored days. 82 days (22.5%) reached Unhealthy for Sensitive Groups or worse, 94 were Good, and the year's peak AQI was 242 (Very Unhealthy). Ground-level ozone set the daily AQI on 206 of those days. The cleanest month of 2023 was March (median AQI 42, 0 days above 100) and the worst was July (median 115, 27 days above 100, peak 159).
- Good: 25.8%
- Moderate: 51.8%
- Unhealthy for Sensitive Groups: 16.7%
- Unhealthy or worse: 5.8%
Extra Protection for Visalia Homes
Air quality in Visalia is moderate (AQI 57), with particle pollution the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
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How was Visalia's air quality in 2023?
Moderate on a typical day: median AQI 69, with 82 days above AQI 100 out of 365 monitored — the 3rd cleanest of 7 years on record for the area.
- ✓Peak AQI in 2023: 242 (Very Unhealthy).
- ✓Ground-level ozone was the main pollutant on 206 days.
- ✓Cleanest month: March; worst: July.
Frequently asked questions
What was the average AQI in Visalia in 2023?▾
EPA's Air Quality System puts Visalia's (Visalia-Porterville, CA) median daily AQI for 2023 at 69, which is Moderate. 82 days were Unhealthy for Sensitive Groups or worse and the year's highest AQI was 242.
Which month had the worst air quality in Visalia in 2023?▾
The cleanest month of 2023 was March (median AQI 42, 0 days above 100) and the worst was July (median 115, 27 days above 100, peak 159).
Was 2023 a good or bad year for Visalia's air?▾
Among the 7 years EPA has published for the area (2019–2025), 2023 ranks 3rd cleanest by days above AQI 100. 2023's median of 69 is in line with the area's typical annual median of 71.
Visalia month by month in 2023
Visalia air quality month by month, 2023 (Visalia-Porterville, CA, EPA AQS daily AQI)
| Month | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| January | 31 | 47 | 0 | 100 | PM2.5 |
| February | 28 | 52 | 0 | 78 | PM2.5 |
| Marchcleanest | 31 | 42 | 0 | 56 | O3 |
| April | 30 | 53 | 2 | 108 | O3 |
| May | 31 | 67 | 5 | 129 | O3 |
| June | 30 | 80 | 6 | 154 | O3 |
| Julyworst | 31 | 115 | 27 | 159 | O3 |
| August | 31 | 97 | 13 | 154 | O3 |
| September | 30 | 106 | 17 | 242 | PM2.5 |
| October | 31 | 60 | 5 | 126 | PM2.5 |
| November | 30 | 68 | 0 | 97 | PM2.5 |
| December | 31 | 74 | 7 | 119 | PM2.5 |
How 2023 compares
Among the 7 years EPA has published for the area (2019–2025), 2023 ranks 3rd cleanest by days above AQI 100.
2023's median of 69 is in line with the area's typical annual median of 71.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Visalia
The latest EPA AirNow observation puts Visalia's AQI at 57 (PM10). The figures above are multi-year annual statistics, not today's reading.
View current Visalia air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Visalia-Porterville, CA), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.