China Air Quality Index Guide for Tourists 2026
If you’re planning a trip to China, air quality is probably on your mind. Images of smog-choked skylines have dominated Western media coverage of China for years. But here’s the good news: China’s air quality has improved dramatically over the past decade, and most tourists experience no issues during their visit.
That said, air quality varies significantly by city, season, and weather conditions. This guide explains everything you need to know about China’s Air Quality Index (AQI), how to check it, when to worry, and how to protect yourself.
The Good News: China’s Air Has Improved
Let’s start with the context. Since China declared “war on pollution” in 2014, the results have been remarkable:
- Beijing’s average PM2.5 dropped from ~85 µg/m³ in 2013 to ~30 µg/m³ in 2025 — a 65% reduction
- National average PM2.5 fell from ~72 µg/m³ to ~29 µg/m³ over the same period
- Coal plant retirements, electric vehicle adoption, and strict industrial emission standards have driven the improvement
- China planted millions of trees and established “ecological red lines” to protect green spaces
Is the air as clean as in New Zealand or Iceland? No. But the stereotype of China as a perpetual smog dystopia is outdated. Many visitors are pleasantly surprised by blue skies, especially in southern cities and during summer.
Understanding the Air Quality Index (AQI)
What Is AQI?
The Air Quality Index is a standardized scale that reports daily air quality. Different countries use different AQI standards. China uses its own AQI system, which is similar to but not identical to the US EPA AQI.
AQI Scales Compared
| AQI Range | US EPA Category | China AQI Category | Health Advice |
|---|---|---|---|
| 0–50 | Good | Excellent (优) | Air is clean — enjoy outdoor activities |
| 51–100 | Moderate | Good (良) | Acceptable; unusually sensitive people should limit prolonged exertion |
| 101–150 | Unhealthy for Sensitive Groups | Lightly Polluted (轻度污染) | Sensitive groups (asthma, heart disease, elderly, children) should reduce outdoor activity |
| 151–200 | Unhealthy | Moderately Polluted (中度污染) | Everyone should reduce prolonged outdoor exertion; wear a mask outdoors |
| 201–300 | Very Unhealthy | Heavily Polluted (重度污染) | Avoid outdoor activity; wear N95 masks; keep windows closed |
| 301–400 | Hazardous | Severely Polluted (严重污染) | Stay indoors; run air purifier; avoid all outdoor exercise |
| 400+ | Hazardous | Severely Polluted (严重污染) | Emergency conditions; remain indoors |
What Is PM2.5?
PM2.5 refers to fine particulate matter smaller than 2.5 micrometers in diameter — about 1/30th the width of a human hair. These particles are the most health-relevant component of air pollution because they penetrate deep into the lungs and enter the bloodstream.
PM2.5 is measured in micrograms per cubic meter (µg/m³). The World Health Organization recommends annual average exposure below 5 µg/m³, while the US EPA standard is 12 µg/m³.
Other Pollutants to Know
| Pollutant | Source | Health Effect |
|---|---|---|
| PM2.5 | Combustion, industry, vehicles | Respiratory and cardiovascular disease |
| PM10 | Dust, construction, roads | Respiratory irritation |
| O3 (Ozone) | Chemical reactions in sunlight | Lung damage, asthma triggers |
| NO2 (Nitrogen dioxide) | Vehicles, power plants | Airway inflammation |
| SO2 (Sulfur dioxide) | Coal burning | Respiratory irritation, acid rain |
| CO (Carbon monoxide) | Incomplete combustion | Reduced oxygen delivery to organs |
For most tourists, PM2.5 is the number to watch. It’s the most harmful and most commonly elevated pollutant in Chinese cities.
Air Quality by City
Cities with Generally Good Air (AQI typically 0–100)
| City | Average AQI | Notes |
|---|---|---|
| Sanya (Hainan) | 20–50 | Tropical coastal city; best air quality in China |
| Kunming (Yunnan) | 30–60 | “Spring City” — mild climate year-round |
| Lijiang (Yunnan) | 25–55 | Mountain air, clean |
| Dali (Yunnan) | 25–55 | Clean mountain air |
| Haikou (Hainan) | 20–50 | Island city, sea breezes |
| Xiamen (Fujian) | 30–60 | Coastal, relatively clean |
| Shenzhen (Guangdong) | 40–70 | Green city, coastal |
| Guilin (Guangxi) | 35–65 | Karst landscape, rural |
| Chengdu (Sichuan) | 50–90 | Improved significantly; can spike in winter |
Cities with Moderate Air Quality (AQI typically 50–150)
| City | Average AQI | Notes |
|---|---|---|
| Shanghai | 50–100 | Improved greatly; worst in winter |
| Hangzhou | 50–100 | Generally fine; occasional winter spikes |
| Guangzhou | 50–100 | Better than northern cities |
| Nanjing | 60–120 | Moderate; winter worse |
| Wuhan | 60–120 | Moderate; industrial |
| Xi’an | 60–120 | Can be hazy, especially in winter |
Cities with Variable/Poorer Air Quality (AQI can exceed 150)
| City | Average AQI | Notes |
|---|---|---|
| Beijing | 60–150 (winter spikes 200+) | Much improved but winter heating season causes spikes |
| Tianjin | 70–150 | Similar to Beijing; industrial |
| Shijiazhuang (Hebei) | 80–200 | Heavy industry; worst air in China |
| Taiyuan (Shanxi) | 80–180 | Coal mining region |
| Harbin (Heilongjiang) | 70–200 | Winter heating coal; severe cold-season pollution |
| Urumqi (Xinjiang) | 70–180 | Industrial + dust storms |
Seasonal Patterns
Air quality in China follows predictable seasonal patterns:
Spring (March–May): Moderate. Dust storms from the Gobi Desert can cause brief PM10 spikes in northern China, especially in March and April. Beijing, Tianjin, and Inner Mongolia are most affected.
Summer (June–August): Generally the best air quality in northern China. Rain and wind help clear pollutants. However, high temperatures increase ozone (O3) levels, which can be a concern in southern cities.
Autumn (September–November): Good to moderate. September and October are excellent months for air quality across most of China. November starts to deteriorate as heating systems come online in the north.
Winter (December–February): The worst season for air quality, especially in northern China. Coal-fired heating systems (the official heating season runs November 15–March 15) significantly increase PM2.5 levels. Temperature inversions trap pollutants near the ground. Beijing, Tianjin, and Hebei province see the worst winter air.
How to Check Air Quality in China
Best Apps and Websites
| App/Website | Platform | Notes |
|---|---|---|
| IQAir (AirVisual) | iOS, Android, Web | Most popular among expats; shows real-time AQI using US EPA standard; free |
| Aqicn.info | Web | Real-time data from monitoring stations across China; free |
| China National AQI | Web (aqi.cn) | Official government data; uses China AQI standard |
| Plume Labs Air Report | iOS, Android | Forecasts air quality 24 hours ahead |
| BreatheLife | Web | WHO air quality data |
Which AQI Standard Should I Use?
You’ll notice different apps may show different AQI numbers for the same city. This is because they use different standards:
- US EPA AQI: Used by AirVisual and most international apps. Generally shows higher numbers.
- China AQI: Used by official Chinese monitoring stations. Can show slightly lower numbers for the same pollution level.
Recommendation: Use AirVisual (US EPA standard) for consistency and slightly more conservative health guidance.
What Numbers Should Worry You?
| AQI (US standard) | What to Do |
|---|---|
| 0–100 | Normal activities. No precautions needed. |
| 101–150 | Sensitive groups (asthma, heart disease, pregnancy, elderly, young children) should reduce prolonged outdoor exertion. Everyone else is fine. |
| 151–200 | Reduce outdoor activity. Wear an N95 mask if you’ll be outside for extended periods. Avoid strenuous exercise outdoors. |
| 201–300 | Avoid outdoor activity. Keep windows closed. Run air purifier if available. Wear N95 masks if you must go outside. |
| 300+ | Stay indoors. Avoid all outdoor exercise. Run air purifier on highest setting. Postpone outdoor activities if possible. |
Masks and Respirators
When You Need a Mask
You do not need to wear a mask every day in China. Most days in most cities, the air is fine. Wear a mask when:
- AQI exceeds 150 (for anyone)
- AQI exceeds 100 (if you have respiratory conditions)
- During winter in northern cities when AQI spikes
- During dust storms in spring
Types of Masks
| Mask Type | Protection | Cost | Notes |
|---|---|---|---|
| Surgical mask | Minimal for PM2.5 | ¥1–¥3 each | Blocks large particles; insufficient for fine pollution |
| Cloth mask | Minimal for PM2.5 | ¥10–¥30 | Fashion item; not effective for air pollution |
| N95/KN95 (disposable) | Filters 95% of PM2.5 | ¥5–¥15 each | Best choice for tourists; widely available in China |
| N99/P100 (disposable) | Filters 99%+ of PM2.5 | ¥15–¥30 each | Higher protection; harder to breathe through |
| N95 reusable (with replaceable filters) | Filters 95% of PM2.5 | ¥50–¥200 + filters | Better for long stays; more comfortable |
| Vogmask | Filters 95%+ of PM2.5 | ¥150–¥300 | Stylish reusable mask popular with expats |
KN95 vs. N95: What’s the Difference?
- N95: US standard (NIOSH-approved). Filters at least 95% of particles ≥0.3 microns.
- KN95: Chinese standard (GB2626-2019). Similar filtration efficiency to N95.
Both are effective for PM2.5 protection. In China, KN95 masks are the most widely available and affordable option.
Where to Buy Masks in China
- Convenience stores (7-Eleven, FamilyMart, Lawson): KN95 masks ¥5–¥15 each
- Pharmacies (look for green cross): KN95 masks ¥5–¥10 each
- Supermarkets (Carrefour, Walmart, Hema): Boxes of 10–50 masks
- Taobao/JD.com: Cheapest option but requires Chinese language skills and delivery time (1–2 days)
- Alipay/WeChat mini-programs: Search for “口罩” (kouzhao = mask)
How to Wear a Mask Properly
- Wash hands before putting on the mask
- Place the mask over nose and mouth, securing the metal strip across the bridge of your nose
- Press down on the metal strip to mold it to your nose
- Adjust the straps so the mask fits snugly with no gaps
- Check the seal by exhaling — you shouldn’t feel air escaping from the sides
- Replace disposable masks after 8 hours of use, or when they become damp
- Do not reuse disposable masks
Air Purifiers
If you’re staying in China for an extended period, or visiting during winter in a northern city, consider the air quality in your accommodation.
Hotels
Many mid-range and luxury hotels in Beijing, Tianjin, and other northern cities now have air purifiers in rooms. When booking, check the amenities or contact the hotel directly to confirm.
If your hotel doesn’t have one, you can:
- Request one — many hotels keep purifiers on request
- Buy a small portable purifier — available on JD.com for ¥200–¥500
- Run the AC on indoor circulation mode — this helps somewhat but isn’t as effective as a HEPA purifier
Rentals and Apartments
If you’re staying in an Airbnb or long-term rental, check whether an air purifier is included. If not, the most popular brands in China are:
| Brand | Price Range | Notes |
|---|---|---|
| Xiaomi (米家) | ¥600–¥1,500 | Best value; widely available; smart features |
| Blueair | ¥3,000–¥8,000 | Premium; very effective |
| IQAir | ¥10,000–¥20,000 | Top-of-the-line; hospital-grade |
| Philips | ¥1,500–¥5,000 | Reliable mid-range |
Health Effects and Who Should Be Concerned
Who Is Most at Risk?
| Group | Risk Level | Recommendations |
|---|---|---|
| Healthy adults | Low | No special precautions needed unless AQI > 200 |
| Children | Moderate | Limit outdoor play when AQI > 150 |
| Elderly (65+) | Moderate | Limit outdoor activity when AQI > 100 |
| People with asthma | High | Carry inhaler; limit outdoor activity when AQI > 100; always wear N95 when AQI > 150 |
| People with heart disease | High | Limit outdoor activity when AQI > 100; consult doctor before travel |
| Pregnant women | Moderate-High | Limit outdoor activity when AQI > 150; consult doctor |
| People with COPD | High | Avoid travel to northern China in winter; consult doctor |
Short-Term Health Effects
For healthy adults, short-term exposure to moderate air pollution (AQI 100–200) typically causes:
- Mild throat irritation
- Coughing
- Dry eyes
- Headache
- Fatigue
These symptoms usually resolve after you leave the polluted area. Drinking plenty of water and using saline nasal spray can help.
Long-Term Considerations
A 1–3 week tourist trip to China, even during moderate pollution, is unlikely to have lasting health effects for a healthy adult. The risk is primarily for:
- Long-term residents (months to years)
- People with pre-existing conditions
- Visiting during severe pollution episodes (AQI 300+)
Practical Tips for Dealing with Poor Air Quality
If AQI Is Elevated During Your Visit:
- Check the forecast. Pollution episodes often last 2–5 days. If you have flexibility in your itinerary, plan indoor activities (museums, shopping malls, temples) on high-pollution days.
- Exercise indoors. Many hotels have gyms. Alternatively, use a gym day pass — major chains like Will’s Fitness and Supermonkey offer drop-in rates of ¥50–¥150 (7–21).
- Keep windows closed. Use the AC on recirculation mode.
- Use a saline nasal spray to clear your nasal passages. Available at any pharmacy (生理盐水喷雾) for ¥15–¥30 (2–4).
- Stay hydrated. Drink plenty of water to help your body clear particles.
- Eat antioxidant-rich foods. Some studies suggest diets high in antioxidants (fruits, vegetables, green tea) may help mitigate pollution effects. Enjoy China’s incredible fruit selection — mangoes, dragon fruit, pomelo, and strawberries are cheap and delicious.
- Take a day trip. Air quality is often better outside city centers. A trip to the Great Wall, a national park, or a rural village can provide a break from urban pollution.
- Head south. If northern China is experiencing a severe pollution episode and you have flexibility, take a high-speed train or flight to southern cities like Kunming, Sanya, or Xiamen where the air is cleaner.
Air Quality and Your Overall China Trip
Don’t Let Air Quality Ruin Your Trip
Many first-time visitors to China worry excessively about air pollution. Here’s some perspective:
- Most tourists experience no health issues from air quality during a typical 1–3 week trip
- Air quality is generally good in spring, summer, and early autumn
- Southern China (Shanghai, Guangzhou, Shenzhen, Yunnan, Hainan, Fujian) has relatively clean air year-round
- The improvement trend is continuing — air in 2026 is far better than it was in 2015
Best Times to Visit for Air Quality
| Season | Air Quality | Best For |
|---|---|---|
| April–May | Good to excellent | Northern China (Beijing, Xi’an) |
| September–October | Good to excellent | All of China — best overall season |
| June–August | Good (but hot/humid) | Northern China; avoid southern heat |
| November–March | Variable to poor (northern) | Southern China only (Hainan, Yunnan, Guangdong) |
Frequently Asked Questions
Q: Will air pollution ruin my photos?
A: On high-pollution days, visibility is reduced and photos can look hazy. Use the “dehaze” feature in Lightroom or Snapseed to fix this in post-processing. On good AQI days (which are common outside winter), you’ll get crisp, clear photos.
Q: Should I cancel my trip if I see high AQI forecasts?
A: No. AQI forecasts change daily. A bad day is often followed by a good day due to wind patterns. Pack an N95 mask, check the app daily, and adjust your itinerary as needed. Unless you have a serious respiratory condition, air quality shouldn’t be a reason to cancel.
Q: Is the air in China worse than in my home country?
A: It depends where you’re from. Annual average PM2.5 in major Chinese cities (2025):
- Beijing: ~30 µg/m³
- Shanghai: ~25 µg/m³
- Los Angeles: ~12 µg/m³
- New York: ~7 µg/m³
- London: ~10 µg/m³
China’s cities have higher pollution than most Western cities, but the gap is narrowing. And during summer, Chinese city air can be as clean as many Western cities.
Q: Do I need to worry about drinking water being affected by air pollution?
A: No. Air pollution doesn’t affect bottled water. Tap water in China isn’t drinkable, but for different reasons (treatment and pipe infrastructure). See our drinking water guide for details.
Q: Where can I find real-time air quality data?
A: Download the IQAir AirVisual app before you arrive. It provides real-time AQI data for every major Chinese city, updated hourly. The website aqicn.info is also excellent.
The Bottom Line
China’s air quality has improved enormously and continues to get better. For most tourists visiting during spring, summer, or autumn, air quality will be a non-issue. If you’re visiting northern China in winter, pack some KN95 masks and check the AQI app daily — but don’t let it dominate your trip.
China is a safe and incredible travel destination. With a little awareness and preparation, air quality doesn’t need to be a concern. See our complete China safety guide for more on staying healthy and secure during your visit.
Last updated: July 2026