Spring Garden, California Air Quality
Spring Garden has a median AQI of 46, earning an air quality grade of B+ — good air quality that ranks better than 24% of US cities. Air quality has remained relatively stable over the past decade. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Spring Garden recorded 103 good air quality days (53% of monitored days) and 4 unhealthy days.
0Current AQI
Quick Facts
| Current AQI | 15 — Good |
| Air Quality Grade | B+ |
| Median AQI (2025) | 46 |
| vs. U.S. Cities | Better than 24% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 4 |
| 10-Year Trend | → Stable |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Spring Garden is sourced from the Quincy monitoring area, located approximately 8 miles from city center. This EPA-certified station continuously tracks particulate matter (PM2.5), the primary driver of air quality alerts in this area.
Wildfire smoke is a significant factor in Spring Garden's air quality, with regional fires capable of pushing AQI from Good to Unhealthy within hours during fire season (typically July through October). On smoke-impacted days, staying indoors with windows closed and running an air purifier with a HEPA filter is the most effective protection.
AQI Trend (10 Years)
Air Quality Days by Year
Spring Garden Median AQI by Year
Annual EPA air quality data for Spring Garden — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2025 | 46 | 103 | 4 | 111 | PM2.5 |
| 2024 | 48 | 188 | 16 | 253 | PM2.5 |
| 2023 | 50 | 186 | 11 | 142 | PM2.5 |
| 2022 | 55 | 148 | 29 | 175 | PM2.5 |
| 2021 | 67 | 97 | 84 | 654 | PM2.5 |
| 2020 | 56 | 135 | 50 | 755 | PM2.5 |
| 2019 | 34 | 220 | 5 | 138 | PM2.5 |
| 2018 | 47 | 186 | 10 | 162 | PM2.5 |
| 2017 | 47 | 184 | 25 | 189 | PM2.5 |
| 2016 | 43 | 203 | 11 | 152 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Spring Garden Air Quality
What is the air quality in Spring Garden today?
The current AQI in Spring Garden is 15, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Spring Garden getting better or worse?
Air quality in Spring Garden has been stable. The median AQI has risen 3 points (from 43 in 2016 to 46 in 2025).
What is the most common air pollutant in Spring Garden?
PM2.5 is the primary air pollutant in Spring Garden, responsible for 195 days (100% of monitored days) in 2025. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Spring Garden have per year?
In 2025, Spring Garden recorded 53% good air quality days (103 days) out of 195 monitored days. There were 4 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 111.
What air quality grade does Spring Garden receive?
Spring Garden receives an air quality grade of B+, placing it better than 24% of US cities. This is based on a median AQI of 46 in 2025, with 103 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 24% of US cities
Nearby Cities
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National Rankings
See how Spring Garden compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Spring Garden
Spring Garden faces elevated PM2.5 from wildfire smoke in addition to year-round traffic and industrial sources. We prioritize True HEPA units with high smoke CADR — essential for rapid air cleaning during smoke events.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
- ✓Good room size match
- ✓Recommended for your air quality
- ✓High performance
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Other Great Options
Molekule Air Pro
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Honeywell HPA300
Powerful workhorse for large rooms. Built to last.
Coway Airmega AP-1512HH
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Not sure which air purifier is right for you?
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