Rock Hill, SC
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.
Rock Hill, SC air quality summary: Rock Hill, SC, holds a clean air score of 74.6 and a grade of B. The city features an annual PM2.5 mean of 7.6, indicating moderate long-term air quality conditions. In Rock Hill, the annual PM2.5 mean is 7.6, which is characterized as a moderate level for long-term exposure. The air quality trend in Rock Hill is currently described as neutral, indicating limited change in long-term particulate levels.
Clean Air Score
A clean air score of 74.6 and a B grade suggest that Rock Hill offers generally acceptable air quality for long-term residency. These metrics reflect particulate levels that fall within a moderate exposure range over time.
🏡 What This Means for Buying
Air quality should be treated as one factor in a broader long-term relocation or housing decision in Rock Hill. Current metrics reflect a moderate environment for persistent particulate exposure.
Indoor Air Quality in Rock Hill, SC
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 Rock Hill.
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 Rock Hill:
- 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 Rock Hill Homes:
🩺 My Health Risk Assessment
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Health Advice
Good for most outdoor activities.
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Rock Hill's air quality improved by 0.3 μg/m³. Based on NBER studies, this change correlates with a estimated 1.2% increase in relative property value retention.
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Why Rock Hill earned a 74.6
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
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📅 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% | 63 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 93.7 |
| 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.
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Rock Hill Air Quality FAQs
Is Rock Hill a good fit for people who care about long-term air quality?
Rock Hill maintains a clean air score of 74.6 and a grade of B, indicating a moderate environment for long-term air quality. The annual PM2.5 mean of 7.6 is considered acceptable for most residents.
What is the frequency of unhealthy air or long-term pollution exposure in Rock Hill?
Rock Hill reports an unhealthy-air frequency of 0% and a B grade for its typical long-term particulate exposure. The annual PM2.5 mean remains at 7.6.
Is air quality in Rock Hill improving or getting worse over time?
The long-term air quality trend in Rock Hill is neutral, suggesting that change has been modest in recent years. This conclusion is backed by a data completeness rate of 99.7%.
Does air quality vary across different parts of Rock Hill?
Air quality results for Rock Hill can be found in more detail by looking at neighborhood or ZIP-level data. Localized factors like traffic and industrial activities can cause conditions to vary throughout the city.