CAMS model • Open-Meteo

NanjingAir quality, PM2.5 and PM10

Check PM2.5 and PM10 particle levels alongside ozone, nitrogen dioxide and other gases. Compare the latest available concentrations with recent days and explore changes in air pollution through the available historical records.

Nanjing - latest available concentrations (September 26, 2026, 09:00 local time): PM2.5: 20 µg/m³, PM10: 20.8 µg/m³, O₃: 27 µg/m³, NO₂: 50 µg/m³, SO₂: 10.8 µg/m³, CO: 532 µg/m³. These are hourly CAMS model values for a point representing the city.

Air quality questions →

7 weather warnings in effect for China 🌫️ Fog⛈️ Thunderstorms🔥 Wildfire risk🌡️ Extreme heat⚠️ Other hazard🌨️ Snow / blizzard +1 more

Nanjing · Air pollutant concentrations

Data time: September 26, 2026 · 09:00 · local time

PM2.5

Fine particles

20µg/m³Moderate · 1 hour

PM10

Particulate matter

20.8µg/m³Fair · 1 hour

O₃

Ozone

27µg/m³Good · 1 hour

NO₂

Nitrogen dioxide

50µg/m³Moderate · 1 hour

SO₂

Sulphur dioxide

10.8µg/m³Good · 1 hour

Carbon monoxide

532µg/m³

PM2.5 vs PM10 - what is the difference? → · Models and monitoring stations →

DAILY DATA · Nanjing

Nanjing - air pollution over recent days (2026-08-31 - 2026-09-25)

Concentrations of all available pollutants for this city.

PM2.5Lowest 14.08 2026-08-31Highest 52.35 2026-09-232026-08-31 - 2026-09-25

Scroll the chart or table sideways to see the full period.

Nanjing · daily averages · µg/m³
Pollutant	2026-09-25	2026-09-24	2026-09-23	2026-09-22	2026-09-21	2026-09-20	2026-09-19	2026-09-07	2026-09-06	2026-09-05	2026-09-04	2026-09-03	2026-09-02	2026-09-01	2026-08-31
PM2.5	43.35	40.3	52.35	48.41	51.35	31.05	27	30.31	23.84	22.93	22.83	15.52	16.49	15.63	14.08
PM10	45.85	46.3	57.41	54.67	56.69	35.27	29.69	34.53	28.1	27.03	27.73	18.6	19.11	18.7	17.34
O₃	61.42	23.96	19.25	28.63	16.04	25.33	28.25	44.38	51.54	54.33	59.25	55.67	57.17	62.67	44.83
NO₂	63.46	72.92	75.89	71.35	76.21	60.29	61.57	59.89	52.45	52.48	45.06	36.97	38.23	34.99	40.44
SO₂	11.43	15.58	17.54	13.45	15.28	11.88	10.4	9.25	8.09	8.45	6.7	5.93	6.4	5.94	5.36
CO	723.79	568.71	631.08	588.08	566.71	400	436.42	392.71	311.92	310.96	309.46	257.88	270.92	265	285.88

A dot on the chart and a dash in the table indicate missing data. The latest day may be incomplete.

How should I interpret the data and averaging period? →

Open-Meteo / CAMS ↗

AIR QUALITY ARCHIVE · Nanjing

Nanjing - air pollution history (2018-10 - 2020-05)

Compare monthly particle and gas concentrations in the available archive.

PM2.5Lowest 19.8 2019-07Highest 69.7 2019-012018-10 - 2020-05

Scroll the chart or table sideways to see the full period.

Nanjing · monthly averages · µg/m³
Pollutant	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10
PM2.5	30.9	32	30.5	32	62.8	52.8	36.2	38.8	27.2	22.8	19.8	30.5	30.7	36.4	46.7	57.2	69.7	44.7	52.6	29.2
PM10	63.7	75.7	60.3	46	88.4	81.3	86.9	90.8	49.9	38.4	48	51.5	73.7	74.4	96.3	83.1	104	76.1	82	68.9
O₃	136	140	110	90.2	65.1	69.2	101	122	170	163	144	175	159	125	111	85.8	67	55.1	102	134
NO₂	27.9	35.8	32.6	24.1	36.4	54.8	49.8	46	34.8	23.2	26.4	25.7	37.6	41.6	48.4	39.6	61.3	53.3	48.4	43.7
SO₂	7.14	8.34	7.76	6.33	5.59	11.4	9.56	10.4	10.3	5.15	7.44	13	14.8	11.2	13.5	9.11	11.3	9.8	8.5	9.01
CO	859	830	697	624	891	1	758	804	728	765	982	918	748	799	982	646	566	535	656	322

A dot on the chart and a dash in the table indicate missing data. Historical values do not describe today’s air quality.

How should I interpret the data and averaging period? →

OpenAQ ↗

Historical data by station 1

AIR QUALITY ARCHIVE · 山西路

山西路

Station code: 山西路

Monthly monitoring station data.

PM2.5Lowest 19.8 2019-07Highest 69.7 2019-012018-10 - 2020-05

Scroll the chart or table sideways to see the full period.

山西路 · monthly averages · µg/m³
Pollutant	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10
PM2.5	30.9	32	30.5	32	62.8	52.8	36.2	38.8	27.2	22.8	19.8	30.5	30.7	36.4	46.7	57.2	69.7	44.7	52.6	29.2
PM10	63.7	75.7	60.3	46	88.4	81.3	86.9	90.8	49.9	38.4	48	51.5	73.7	74.4	96.3	83.1	104	76.1	82	68.9
O₃	136	140	110	90.2	65.1	69.2	101	122	170	163	144	175	159	125	111	85.8	67	55.1	102	134
NO₂	27.9	35.8	32.6	24.1	36.4	54.8	49.8	46	34.8	23.2	26.4	25.7	37.6	41.6	48.4	39.6	61.3	53.3	48.4	43.7
SO₂	7.14	8.34	7.76	6.33	5.59	11.4	9.56	10.4	10.3	5.15	7.44	13	14.8	11.2	13.5	9.11	11.3	9.8	8.5	9.01
CO	859	830	697	624	891	1	758	804	728	765	982	918	748	799	982	646	566	535	656	322

PM1016.6

µg/m³

PM2.5 · Moderate

NO₂ 13.7O₃ 45

September 26, 202609:00

China · air quality in other cities

Shanghai Zhumadian Beijing Nanchong Tai’an Yueyang Kaifeng Wuhan Chongqing Chengdu Tianjin Puyang Shenyangzhan Tianshui Shiyan Harbin Xi’an Lanzhou Guangzhou

WEATHER & SURROUNDINGS

China · weather forecast

Daily maximum and minimum temperatures. Forecast point: 35, 105. Forecast for a country reference point; conditions in the city may differ.

Scroll the forecast to see the following days.

China · September 23, 2026: minimum temperature 13.8°C, maximum 19°C. Wind: 24.7 km/h. Humidity: 59%.

Full forecast: temperature, rainfall, wind and humidity

Date	Day °C	Min °C	Max °C	Night °C	Rain mm	Wind m/s	Humidity %	Clouds %
2026-09-23	17.7	13.8	19	13.8	0.4	6.9	59	100
2026-09-24	13.7	11.3	14.5	11.3	1.6	3.1	68	100
2026-09-25	16	11.4	20.2	14.4	3.9	3.8	56	98
2026-09-26	16.3	11.7	16.3	14.8	2.6	3.1	72	100
2026-09-27	16.8	13.2	16.8	13.3	0.2	2.1	64	100
2026-09-28	12.6	9.9	13.2	9.9	4.2	3.3	84	100
2026-09-29	15.8	8.5	18.3	12.7	0.5	6.5	60	11
2026-09-30	15.2	9.6	15.2	9.6	0.6	4.7	43	100
2026-10-01	14.7	8.1	18.2	13.1	16.2	4.5	52	2
2026-10-02	15.4	10.4	19.3	12.9	2.5	5.9	63	26
2026-10-03	15.1	10.7	19.3	14.3	0.4	3.9	73	100
2026-10-04	16.5	11.3	19.9	13.3	0.4	6.6	71	59
2026-10-05	16	12.8	19.7	13.3	19.4	5.9	71	100
2026-10-06	14.6	11.9	19.4	13.7	0.2	6.9	77	100
2026-10-07	14.8	6	17.8	6	16.4	7.4	76	99
2026-10-08	7.8	3.9	8.4	8.4	26.2	5.7	79	100
2026-10-09	11.7	8.2	14.8	10.9	—	3.9	64	47
2026-10-10	8.9	8.2	10	8.2	10.1	2.4	92	100

UV index by day · China

Data for a country reference point. Local conditions may differ.

SPF 30-50, hat and sunglasses are a must. Better to stay in the shade 11:00-15:00.

0-2 low3-5 moderate6-7 high8-10 very high11+ extreme

Scroll the forecast to see the following days.

China · September 25, 2026: UV index: 6 .

Indicator	2026-09-25	2026-09-26	2026-09-27	2026-09-28	2026-09-29	2026-09-30	2026-10-01	2026-10-02	2026-10-03	2026-10-04	2026-10-05	2026-10-06	2026-10-07	2026-10-08	2026-10-09	2026-10-10
UV index	6	4.1	1.5	0.7	6.6	4.3	6.9	6.7	6.3	6.5	5.9	6.4	4.6	0.8	6.5	—

Open-Meteo ↗

AIR QUALITY QUESTIONS

Nanjing · air pollution - questions and answers

What do the latest air quality data show for Nanjing?

When was PM2.5 highest in Nanjing over the past week?

The highest available daily mean PM2.5 was 52.4 µg/m³ (September 23, 2026). This comparison covers 7 days with data in the seven days before September 26, 2026. The day of the latest reading is excluded because it may be incomplete.

What period does the pollution history for Nanjing cover?

Available monthly means cover 2018-10 - 2020-05. The tables include PM2.5, PM10, O₃, NO₂, SO₂, CO. Missing values are marked with a dash, not treated as zero. Monthly archives and current model data may come from different sources.

Is the PM2.5 concentration for Nanjing an AQI score?

No. PM2.5 and PM10 are concentrations in µg/m³. AQI is a separate index calculated using a defined scale. When comparing air quality, also check other pollutants, the date and the averaging period.

What UV index does the available forecast show for Nanjing?

For September 25, 2026, the forecast UV index is 6. The UV section also shows the following available days. The forecast is for a country reference point (China), not the city itself.

What wind speed is forecast for Nanjing?

For September 23, 2026, forecast wind speed is 24.7 km/h. The weather table includes wind, temperature and other available parameters for subsequent days. These data describe a country reference point (China); local wind may differ.

PM2.5 · PM10 · NO₂ · O₃

Understanding air quality and pollution data

What do PM2.5 and PM10 mean?

PM2.5 and PM10 are fractions of airborne particulate matter. PM2.5 covers fine particles up to 2.5 micrometres in diameter, while PM10 covers particles up to 10 micrometres. Concentrations in µg/m³ tell you how many micrograms of particles are present in a cubic metre of air. Compare values over the same time period.

Where does the air pollution data come from?

The latest concentrations come from the CAMS atmospheric model via Open-Meteo for each city’s coordinates. Values describe a model area, so conditions on individual streets may differ. Historical monitoring station data is shown separately where available.

How does PM2.5 concentration differ from AQI?

PM2.5 is the concentration of one particle fraction, expressed in µg/m³. AQI is an index calculated using a particular scale and thresholds. The pollutant cards show concentrations. Our city ranking compares PM2.5; PM10, ozone, nitrogen dioxide and other available gases add to the picture of air quality.

Which dates do the values and charts cover?

Each current value has a data date and time. Current concentration cards show the latest available hour, daily charts summarise individual days, and monthly records let you compare longer periods. These values represent different time intervals.

How can I check pollution in my city?

Search for your city and open its air quality page. Start with PM2.5 and PM10, then check the other available pollutants and the data timestamp. Charts and tables help you compare concentrations over time. Weather and historical climate information complement the pollution data.

Open-Meteo / CAMS ↗NASA POWER ↗