South Gate, CA
Long-term air quality
What this page tells you
This page combines annual PM2.5, unhealthy days, 5-year trend, and data coverage so you can compare long-term air quality, not just today's reading.
South Gate, CA air quality summary: South Gate, CA receives a clean air score of 38 and a grade of F, reflecting significant long-term air quality challenges. The annual mean for PM2.5 in the city is 12.1 µg/m³. The annual mean concentration of PM2.5 in South Gate is 12.1 µg/m³. Long-term air quality in South Gate has been worsening over recent years.
Clean Air Score
A clean air score of 38 and a grade of F signify that South Gate experiences high long-term exposure to particulate matter. These ratings indicate poor environmental conditions for long-term residency.
🏡 What This Means for Buying
South Gate's air quality should be a primary consideration for anyone evaluating long-term living conditions. The F grade reflects a level of particulate matter that is elevated by national standards.
Indoor Air Quality in South Gate, CA
Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.
How to react when today's AQI changes
Use the AQI bands below to decide whether to open windows, run an air purifier, or stay indoors when pollution spikes in South Gate.
AQI 0-50
GoodOpen windows: Open windows if you want fresh air.
Air purifier: No purifier needed for most homes.
Indoor activity: Normal indoor activity is fine.
AQI 51-100
ModerateOpen windows: Sensitive groups should limit open-window time.
Air purifier: Use fans or filtration if dust or pollen is bothering you.
Indoor activity: Most people can stay active indoors.
AQI 101-150
Unhealthy for Sensitive GroupsOpen windows: Keep windows closed.
Air purifier: Run a HEPA purifier in the main room and bedroom.
Indoor activity: Sensitive groups should reduce outdoor exposure.
AQI 151+
UnhealthyOpen windows: Keep windows and doors closed.
Air purifier: Run HEPA continuously and seal obvious drafts.
Indoor activity: Stay indoors as much as possible; use an N95 if you must go out.
Common indoor air concerns in South Gate:
- Wildfire smoke infiltration (PM2.5)
- Seasonal pollen and dust mite allergens
- VOCs from household products
Recommended action: If today's AQI reaches 101 or higher, close windows and run HEPA filtration before indoor air starts to feel smoky or stale.
Top Products for South Gate Homes:
🩺 My Health Risk Assessment
See how South Gate's air quality affects you and your family specifically.
Health Advice
Reduce prolonged outdoor exertion.
Add South Gate Air Quality to your site
Perfect for local news, real estate blogs, and community pages.
</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, South Gate's air quality worsened by 1.2 μg/m³. Based on NBER studies, this change correlates with a estimated 4.8% decrease in relative property value retention.
Cleaner Alternatives in CA
Why South Gate earned a 38
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
Avoid pollution spikes on your next ride.
📅 Past 30 Days Trend
Real-time daily PM2.5 AQI
🌸 Pollen Outlook
Current Seasonal Forecast
How it worksBased on current seasonal forecast data. Not a long-term pollution rating or relocation score.
Score Breakdown
| Component | Weight | Score Contribution |
|---|---|---|
| Annual Air Quality | 40% | 0 |
| Unhealthy Days | 25% | 61.2 |
| 5-Year Trend | 20% | 44 |
| Seasonal Variability | 10% | 77.2 |
| Extreme Events | 5% | 100 |
Explore More Air Quality Data
Frequently Asked Questions
About This Data
Data Sources
Historical air quality mapping and scoring are based completely on official U.S. Environmental Protection Agency (EPA) AirNow API data. 5-day AQI forecasts are provided by WAQI.
Methodology
Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:
- Annual PM2.5 averages (40%)
- Frequency of unhealthy days (25%)
- 5-year pollution trends (20%)
- Seasonal variability and extreme events (15%)
Updates & Accuracy
Real-time data is updated hourly. Historical aggregate scores are recalculated monthly to reflect the latest trends. While we strive for accuracy, sensor maintenance and local conditions can affect individual readings.
Practical Advice
When AQI > 100: Sensitive groups (children, elderly, asthmatics) should limit prolonged outdoor exertion.
When AQI > 150: Everyone should avoid outdoor exercise and keep windows closed.
More Cities in CA
Similar Rankings Nationwide
South Gate Air Quality FAQs
Is South Gate a good fit for people who care about long-term air quality?
South Gate's clean air score of 38 and grade of F indicate very high long-term particulate exposure. The annual PM2.5 mean of 12.1 µg/m³ is considered elevated for long-term health considerations.
How frequent is unhealthy air in South Gate?
In South Gate, 1.9% of days are classified as unhealthy, reflecting its F grade and PM2.5 mean of 12.1 µg/m³. Residents face more frequent exposure to pollution than in most other cities.
Is air quality in South Gate improving or getting worse over time?
The air quality trend in South Gate is currently worsening, indicating a decline in long-term conditions over recent years.
Does air quality vary within South Gate?
Air quality can vary within the city due to local traffic, industry, and location patterns, without naming specific districts.