What is the current concentration of PM10 in Napa, California?

The current PM10 concentration at Napa, California is 20.043 μg/m3.

What is the current concentration of sulfur dioxide (SO2) in Napa, California?

The current sulfur dioxide (SO2) concentration at Napa, California is 0.376 ppb.

What is the current concentration of ozone (O3) in Napa, California?

The current ozone (O3) concentration at Napa, California is 19.202 ppm.

What is the current concentration of nitrogen dioxide (NO2) in Napa, California?

The current nitrogen dioxide (NO2) concentration at Napa, California is 2.462 ppb.

Napa, California live air quality index now

Q: What is the current concentration of PM2.5 in Napa, California?

The current PM2.5 concentration at Napa, California is 5.405 μg/m3.

Stay updated with real-time air quality in Napa, California featuring accurate data on AQI, PM_2.5, PM₁₀, O₃, NO₂, SO₂, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.

Live AQI (Air Quality Index)

Good

Napa, California

Last updated: ... (Local time)

Major air pollutants in Napa, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

5.41 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

20.04 μg/m³

155

255

425

605+

Ozone (O₃)

19.20 ppb

201

201+

Sulfur Dioxide (SO₂)

0.38 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.46 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.30 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Napa, California

Get Live Pollen Counts

Napa, California

Scroll To Air Quality Map

Track live Napa, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-26T15:00:00.000Z	27 \| good	4.694 \| good	14.298 \| good	17.295 \| good	0.381 \| good	1.791 \| good	0.275 \| good
2026-07-26T16:00:00.000Z	27 \| good	4.635 \| good	16.807 \| good	17.874 \| good	0.389 \| good	1.508 \| good	0.293 \| good
2026-07-26T17:00:00.000Z	38 \| good	6.599 \| good	31.866 \| good	15.939 \| good	0.423 \| good	1.559 \| good	0.276 \| good
2026-07-26T18:00:00.000Z	33 \| good	5.93 \| good	21.177 \| good	19.576 \| good	0.443 \| good	1.789 \| good	0.273 \| good
2026-07-26T19:00:00.000Z	27 \| good	5.16 \| good	22.238 \| good	19.948 \| good	0.452 \| good	2.045 \| good	0.289 \| good
2026-07-26T20:00:00.000Z	22 \| good	3.959 \| good	17.7 \| good	20.831 \| good	0.425 \| good	1.573 \| good	0.273 \| good
2026-07-26T21:00:00.000Z	22 \| good	4.185 \| good	12.874 \| good	24.256 \| good	0.416 \| good	1.33 \| good	0.309 \| good
2026-07-26T22:00:00.000Z	27 \| good	4.937 \| good	24.008 \| good	24.126 \| good	0.372 \| good	1.248 \| good	0.309 \| good
2026-07-26T23:00:00.000Z	22 \| good	2.185 \| good	12.604 \| good	23.947 \| good	0.417 \| good	0.782 \| good	0.309 \| good
2026-07-27T00:00:00.000Z	22 \| good	3.664 \| good	14.944 \| good	22.65 \| good	0.471 \| good	0.947 \| good	0.309 \| good
2026-07-27T01:00:00.000Z	24 \| good	2.997 \| good	10.432 \| good	26.444 \| good	0.437 \| good	0.951 \| good	0.309 \| good
2026-07-27T02:00:00.000Z	24 \| good	2.582 \| good	13.224 \| good	25.687 \| good	0.452 \| good	0.972 \| good	0.273 \| good
2026-07-27T03:00:00.000Z	27 \| good	5.295 \| good	22.984 \| good	26.153 \| good	0.279 \| good	1.526 \| good	0.092 \| good
2026-07-27T04:00:00.000Z	24 \| good	3.888 \| good	17.906 \| good	25.635 \| good	0.343 \| good	2.419 \| good	0.273 \| good
2026-07-27T05:00:00.000Z	23 \| good	3.608 \| good	11.261 \| good	24.688 \| good	0.332 \| good	2.627 \| good	0.273 \| good
2026-07-27T06:00:00.000Z	22 \| good	3.535 \| good	18.854 \| good	22.829 \| good	0.352 \| good	2.304 \| good	0.273 \| good
2026-07-27T07:00:00.000Z	21 \| good	3.145 \| good	11.738 \| good	22.782 \| good	0.352 \| good	2.507 \| good	0.255 \| good
2026-07-27T08:00:00.000Z	22 \| good	3.739 \| good	18.704 \| good	21.277 \| good	0.342 \| good	2.023 \| good	0.24 \| good
2026-07-27T09:00:00.000Z	22 \| good	3.905 \| good	17.454 \| good	21.026 \| good	0.312 \| good	2.128 \| good	0.268 \| good
2026-07-27T10:00:00.000Z	19 \| good	2.592 \| good	8.687 \| good	20.515 \| good	0.315 \| good	2.053 \| good	0.268 \| good
2026-07-27T11:00:00.000Z	22 \| good	3.551 \| good	16.082 \| good	18.302 \| good	0.337 \| good	1.797 \| good	0.268 \| good
2026-07-27T12:00:00.000Z	17 \| good	3.479 \| good	13.609 \| good	18.359 \| good	0.337 \| good	1.986 \| good	0.268 \| good
2026-07-27T13:00:00.000Z	22 \| good	4.01 \| good	17.166 \| good	18.882 \| good	0.292 \| good	2.718 \| good	0.252 \| good
2026-07-27T14:00:00.000Z	17 \| good	2.755 \| good	11.156 \| good	17.783 \| good	0.347 \| good	3.472 \| good	0.257 \| good
2026-07-27T15:00:00.000Z	16 \| good	3.242 \| good	12.387 \| good	16.306 \| good	0.347 \| good	3.002 \| good	0.275 \| good
2026-07-27T16:00:00.000Z	17 \| good	3.073 \| good	10.905 \| good	18.208 \| good	0.367 \| good	3.151 \| good	0.275 \| good
2026-07-27T17:00:00.000Z	19 \| good	2.331 \| good	14.662 \| good	20.488 \| good	0.406 \| good	3.269 \| good	0.294 \| good
2026-07-27T18:00:00.000Z	20 \| good	2.941 \| good	17.414 \| good	22.078 \| good	0.426 \| good	3.577 \| good	0.309 \| good
2026-07-27T19:00:00.000Z	27 \| good	5.41 \| good	26.103 \| good	23.591 \| good	0.421 \| good	2.886 \| good	0.292 \| good
2026-07-27T20:00:00.000Z	22 \| good	3.711 \| good	19.443 \| good	24.286 \| good	0.405 \| good	2.767 \| good	0.273 \| good
2026-07-27T21:00:00.000Z	33 \| good	6.157 \| good	24.259 \| good	25.495 \| good	0.416 \| good	2.475 \| good	0.309 \| good
2026-07-27T22:00:00.000Z	27 \| good	4.987 \| good	28.526 \| good	27.402 \| good	0.479 \| good	2.109 \| good	0.309 \| good
2026-07-27T23:00:00.000Z	27 \| good	3.506 \| good	14.503 \| good	29.089 \| good	0.368 \| good	1.908 \| good	0.309 \| good
2026-07-28T00:00:00.000Z	27 \| good	3.105 \| good	16.02 \| good	29.11 \| good	0.455 \| good	1.138 \| good	0.309 \| good
2026-07-28T01:00:00.000Z	28 \| good	3.104 \| good	13.949 \| good	30.287 \| good	0.466 \| good	1.256 \| good	0.309 \| good
2026-07-28T02:00:00.000Z	28 \| good	3.559 \| good	17.5 \| good	29.938 \| good	0.412 \| good	2.122 \| good	0.309 \| good
2026-07-28T03:00:00.000Z	27 \| good	3.734 \| good	17.391 \| good	28.989 \| good	0.357 \| good	2.043 \| good	0.273 \| good
2026-07-28T04:00:00.000Z	27 \| good	4.709 \| good	22.469 \| good	28.866 \| good	0.388 \| good	2.375 \| good	0.309 \| good
2026-07-28T05:00:00.000Z	23 \| good	4.463 \| good	19.95 \| good	24.981 \| good	0.357 \| good	2.331 \| good	0.309 \| good
2026-07-28T06:00:00.000Z	38 \| good	6.765 \| good	24.434 \| good	24.314 \| good	0.321 \| good	2.765 \| good	0.273 \| good
2026-07-28T07:00:00.000Z	33 \| good	6.416 \| good	25.411 \| good	22.974 \| good	0.377 \| good	4.15 \| good	0.297 \| good
2026-07-28T08:00:00.000Z	38 \| good	6.689 \| good	19.957 \| good	23.625 \| good	0.33 \| good	3.43 \| good	0.268 \| good
2026-07-28T09:00:00.000Z	33 \| good	6.215 \| good	16.054 \| good	20.908 \| good	0.341 \| good	3.513 \| good	0.268 \| good
2026-07-28T10:00:00.000Z	33 \| good	6.469 \| good	26.04 \| good	21.303 \| good	0.331 \| good	2.611 \| good	0.268 \| good
2026-07-28T11:00:00.000Z	33 \| good	5.55 \| good	20.782 \| good	19.719 \| good	0.341 \| good	2.492 \| good	0.268 \| good
2026-07-28T12:00:00.000Z	33 \| good	5.899 \| good	24.854 \| good	19.727 \| good	0.341 \| good	1.914 \| good	0.268 \| good
2026-07-28T13:00:00.000Z	22 \| good	4.452 \| good	16.089 \| good	20.18 \| good	0.417 \| good	1.857 \| good	0.252 \| good
2026-07-28T14:00:00.000Z	27 \| good	5.405 \| good	20.043 \| good	19.202 \| good	0.376 \| good	2.462 \| good	0.303 \| good
2026-07-28T14:00:00.000Z	27 \| good	5.405 \| good	20.043 \| good	19.202 \| good	0.376 \| good	2.462 \| good	0.303 \| good
2026-07-28T15:00:00.000Z	33 \| good	6.375 \| good	27.974 \| good	17.678 \| good	0.259 \| good	2.62 \| good	0.084 \| good
2026-07-28T16:00:00.000Z	27 \| good	5.189 \| good	22.877 \| good	20.723 \| good	0.275 \| good	1.8 \| good	0.083 \| good
2026-07-28T17:00:00.000Z	27 \| good	5.049 \| good	21.877 \| good	24.724 \| good	0.299 \| good	1.354 \| good	0.084 \| good
2026-07-28T18:00:00.000Z	33 \| good	5.776 \| good	24.946 \| good	29.153 \| good	0.319 \| good	1.011 \| good	0.085 \| good
2026-07-28T19:00:00.000Z	31 \| good	5.474 \| good	23.069 \| good	33.059 \| good	0.331 \| good	0.808 \| good	0.086 \| good
2026-07-28T20:00:00.000Z	33 \| good	5.375 \| good	22.996 \| good	36.056 \| good	0.34 \| good	0.705 \| good	0.085 \| good
2026-07-28T21:00:00.000Z	35 \| good	5.386 \| good	22.997 \| good	37.575 \| good	0.347 \| good	0.648 \| good	0.085 \| good
2026-07-28T22:00:00.000Z	32 \| good	5.032 \| good	21.972 \| good	34.806 \| good	0.35 \| good	0.629 \| good	0.083 \| good
2026-07-28T23:00:00.000Z	26 \| good	3.357 \| good	14.993 \| good	28.38 \| good	0.34 \| good	0.626 \| good	0.081 \| good
2026-07-29T00:00:00.000Z	24 \| good	3.795 \| good	16.076 \| good	26.073 \| good	0.319 \| good	0.668 \| good	0.079 \| good
2026-07-29T01:00:00.000Z	23 \| good	3.439 \| good	15.02 \| good	24.872 \| good	0.292 \| good	0.823 \| good	0.078 \| good
2026-07-29T02:00:00.000Z	22 \| good	4.236 \| good	18.901 \| good	22.596 \| good	0.272 \| good	1.122 \| good	0.078 \| good
2026-07-29T03:00:00.000Z	22 \| good	4.447 \| good	18.989 \| good	21.447 \| good	0.266 \| good	1.78 \| good	0.079 \| good
2026-07-29T04:00:00.000Z	27 \| good	4.796 \| good	20.895 \| good	20.202 \| good	0.273 \| good	2.663 \| good	0.081 \| good
2026-07-29T05:00:00.000Z	22 \| good	4.237 \| good	18.902 \| good	17.897 \| good	0.275 \| good	3.711 \| good	0.085 \| good
2026-07-29T06:00:00.000Z	27 \| good	4.73 \| good	20.874 \| good	16.661 \| good	0.274 \| good	4.525 \| good	0.089 \| good
2026-07-29T07:00:00.000Z	27 \| good	4.56 \| good	19.957 \| good	16.118 \| good	0.266 \| good	5.366 \| good	0.093 \| good
2026-07-29T08:00:00.000Z	27 \| good	4.911 \| good	21.033 \| good	15.643 \| good	0.255 \| good	5.797 \| good	0.096 \| good
2026-07-29T09:00:00.000Z	27 \| good	4.635 \| good	20.005 \| good	15.218 \| good	0.247 \| good	5.948 \| good	0.096 \| good
2026-07-29T10:00:00.000Z	22 \| good	3.961 \| good	17.039 \| good	14.884 \| good	0.239 \| good	6.165 \| good	0.096 \| good
2026-07-29T11:00:00.000Z	22 \| good	4.029 \| good	17.902 \| good	14.777 \| good	0.236 \| good	6.538 \| good	0.098 \| good
2026-07-29T12:00:00.000Z	22 \| good	4.355 \| good	18.971 \| good	14.22 \| good	0.222 \| good	7.101 \| good	0.1 \| good
2026-07-29T13:00:00.000Z	27 \| good	4.547 \| good	19.898 \| good	14.495 \| good	0.21 \| good	7.498 \| good	0.102 \| good
2026-07-29T14:00:00.000Z	27 \| good	4.522 \| good	19.923 \| good	15.39 \| good	0.203 \| good	5.357 \| good	0.104 \| good
2026-07-29T15:00:00.000Z	38 \| good	6.591 \| good	29.876 \| good	16.765 \| good	0.26 \| good	3.131 \| good	0.094 \| good
2026-07-29T16:00:00.000Z	33 \| good	5.759 \| good	24.93 \| good	19.072 \| good	0.296 \| good	2.378 \| good	0.093 \| good
2026-07-29T17:00:00.000Z	27 \| good	5.273 \| good	22.856 \| good	22.402 \| good	0.338 \| good	1.779 \| good	0.094 \| good
2026-07-29T18:00:00.000Z	33 \| good	6.09 \| good	26.868 \| good	27.224 \| good	0.375 \| good	1.325 \| good	0.095 \| good
2026-07-29T19:00:00.000Z	33 \| good	6.144 \| good	26.898 \| good	32.545 \| good	0.405 \| good	1.073 \| good	0.097 \| good
2026-07-29T20:00:00.000Z	38 \| good	6.585 \| good	29.785 \| good	36.475 \| good	0.431 \| good	0.935 \| good	0.097 \| good
2026-07-29T21:00:00.000Z	38 \| good	6.689 \| good	29.843 \| good	37.085 \| good	0.441 \| good	0.831 \| good	0.098 \| good
2026-07-29T22:00:00.000Z	31 \| good	5.418 \| good	23.058 \| good	32.91 \| good	0.44 \| good	0.757 \| good	0.097 \| good
2026-07-29T23:00:00.000Z	26 \| good	3.856 \| good	16.981 \| good	28.379 \| good	0.423 \| good	0.709 \| good	0.095 \| good
2026-07-30T00:00:00.000Z	27 \| good	4.73 \| good	20.926 \| good	26.407 \| good	0.382 \| good	0.719 \| good	0.093 \| good
2026-07-30T01:00:00.000Z	27 \| good	4.936 \| good	20.998 \| good	25.774 \| good	0.329 \| good	0.856 \| good	0.092 \| good
2026-07-30T02:00:00.000Z	27 \| good	4.621 \| good	19.966 \| good	23.233 \| good	0.3 \| good	1.201 \| good	0.093 \| good
2026-07-30T03:00:00.000Z	27 \| good	5.019 \| good	21.872 \| good	20.903 \| good	0.286 \| good	1.956 \| good	0.095 \| good
2026-07-30T04:00:00.000Z	27 \| good	5.163 \| good	21.989 \| good	20.025 \| good	0.283 \| good	3.577 \| good	0.101 \| good
2026-07-30T05:00:00.000Z	27 \| good	5.332 \| good	22.976 \| good	18.184 \| good	0.286 \| good	5.022 \| good	0.107 \| good
2026-07-30T06:00:00.000Z	44 \| good	8.339 \| good	11.138 \| good	14.763 \| good	0.285 \| good	6.038 \| good	0.112 \| good
2026-07-30T07:00:00.000Z	27 \| good	5.479 \| good	23.93 \| good	17.863 \| good	0.28 \| good	6.791 \| good	0.115 \| good
2026-07-30T08:00:00.000Z	33 \| good	6.173 \| good	26.91 \| good	16.757 \| good	0.267 \| good	7.11 \| good	0.116 \| good
2026-07-30T09:00:00.000Z	27 \| good	5.365 \| good	22.935 \| good	15.745 \| good	0.256 \| good	7.155 \| good	0.116 \| good
2026-07-30T10:00:00.000Z	27 \| good	5.229 \| good	22.891 \| good	15.298 \| good	0.246 \| good	7.185 \| good	0.115 \| good
2026-07-30T11:00:00.000Z	27 \| good	5.278 \| good	22.889 \| good	15.539 \| good	0.239 \| good	7.25 \| good	0.115 \| good
2026-07-30T12:00:00.000Z	44 \| good	7.765 \| good	9.59 \| good	9.929 \| good	0.238 \| good	7.242 \| good	0.115 \| good
2026-07-30T13:00:00.000Z	44 \| good	7.819 \| good	9.54 \| good	9.43 \| good	0.232 \| good	7.437 \| good	0.116 \| good
2026-07-30T14:00:00.000Z	44 \| good	7.997 \| good	9.661 \| good	10.935 \| good	0.225 \| good	5.894 \| good	0.118 \| good

Napa

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Napa, California air quality map: Track AQI near you

0.22ppm

How accurate is California, USA air quality data?

Air quality data and pollutant measurements for California, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.

Source: Ambee Data Sources

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Frequently asked questions

How often is the air quality data for Napa, California updated?

The air quality for Napa, California is updated every hour.

When was the worst air quality at Napa, California in the last 24 hrs?

The worst air quality in Napa, California in the last 24 hours was observed at 08:00:00 on 2026-07-28.

When was the best air quality at Napa, California in the last 24 hrs?

In the last 24 hrs, the best air quality in Napa, California was observed at 03:00:00 on 2026-07-27.

What is the current air quality in Napa, California?

The current air quality in Napa, California is 27, categorized as Good based on real-time data.

What pollutant is the most common in Napa, California?

The most common pollutant in Napa, California is PM2.5.

What should I do if the air quality in Napa, California is poor?

If the air quality in Napa, California is poor, consider staying indoors and wearing a mask to protect yourself.

What is the current concentration of PM_2.5 in Napa, California?

The current PM_2.5 concentration at Napa, California is 5.405 μg/m³.

What is the current concentration of PM₁₀ in Napa, California?

The current PM₁₀ concentration at Napa, California is 20.043 μg/m³.

What is the current concentration of carbon monoxide (CO) in Napa, California?

The current carbon monoxide (CO) concentration at Napa, California is 0.303 ppm.

What is the current concentration of sulfur dioxide (SO₂) in Napa, California?

The current sulfur dioxide (SO₂) concentration at Napa, California is 0.376 ppb.

What is the current concentration of ozone (O₃) in Napa, California?

The current ozone (O₃) concentration at Napa, California is 19.202 ppm.

What is the current concentration of nitrogen dioxide (NO₂) in Napa, California?

The current nitrogen dioxide (NO₂) concentration at Napa, California is 2.462 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-26T15:00:00.000Z	27 \| good	4.694 \| good	14.298 \| good	17.295 \| good	0.381 \| good	1.791 \| good	0.275 \| good
2026-07-26T16:00:00.000Z	27 \| good	4.635 \| good	16.807 \| good	17.874 \| good	0.389 \| good	1.508 \| good	0.293 \| good
2026-07-26T17:00:00.000Z	38 \| good	6.599 \| good	31.866 \| good	15.939 \| good	0.423 \| good	1.559 \| good	0.276 \| good
2026-07-26T18:00:00.000Z	33 \| good	5.93 \| good	21.177 \| good	19.576 \| good	0.443 \| good	1.789 \| good	0.273 \| good
2026-07-26T19:00:00.000Z	27 \| good	5.16 \| good	22.238 \| good	19.948 \| good	0.452 \| good	2.045 \| good	0.289 \| good
2026-07-26T20:00:00.000Z	22 \| good	3.959 \| good	17.7 \| good	20.831 \| good	0.425 \| good	1.573 \| good	0.273 \| good
2026-07-26T21:00:00.000Z	22 \| good	4.185 \| good	12.874 \| good	24.256 \| good	0.416 \| good	1.33 \| good	0.309 \| good
2026-07-26T22:00:00.000Z	27 \| good	4.937 \| good	24.008 \| good	24.126 \| good	0.372 \| good	1.248 \| good	0.309 \| good
2026-07-26T23:00:00.000Z	22 \| good	2.185 \| good	12.604 \| good	23.947 \| good	0.417 \| good	0.782 \| good	0.309 \| good
2026-07-27T00:00:00.000Z	22 \| good	3.664 \| good	14.944 \| good	22.65 \| good	0.471 \| good	0.947 \| good	0.309 \| good
2026-07-27T01:00:00.000Z	24 \| good	2.997 \| good	10.432 \| good	26.444 \| good	0.437 \| good	0.951 \| good	0.309 \| good
2026-07-27T02:00:00.000Z	24 \| good	2.582 \| good	13.224 \| good	25.687 \| good	0.452 \| good	0.972 \| good	0.273 \| good
2026-07-27T03:00:00.000Z	27 \| good	5.295 \| good	22.984 \| good	26.153 \| good	0.279 \| good	1.526 \| good	0.092 \| good
2026-07-27T04:00:00.000Z	24 \| good	3.888 \| good	17.906 \| good	25.635 \| good	0.343 \| good	2.419 \| good	0.273 \| good
2026-07-27T05:00:00.000Z	23 \| good	3.608 \| good	11.261 \| good	24.688 \| good	0.332 \| good	2.627 \| good	0.273 \| good
2026-07-27T06:00:00.000Z	22 \| good	3.535 \| good	18.854 \| good	22.829 \| good	0.352 \| good	2.304 \| good	0.273 \| good
2026-07-27T07:00:00.000Z	21 \| good	3.145 \| good	11.738 \| good	22.782 \| good	0.352 \| good	2.507 \| good	0.255 \| good
2026-07-27T08:00:00.000Z	22 \| good	3.739 \| good	18.704 \| good	21.277 \| good	0.342 \| good	2.023 \| good	0.24 \| good
2026-07-27T09:00:00.000Z	22 \| good	3.905 \| good	17.454 \| good	21.026 \| good	0.312 \| good	2.128 \| good	0.268 \| good
2026-07-27T10:00:00.000Z	19 \| good	2.592 \| good	8.687 \| good	20.515 \| good	0.315 \| good	2.053 \| good	0.268 \| good
2026-07-27T11:00:00.000Z	22 \| good	3.551 \| good	16.082 \| good	18.302 \| good	0.337 \| good	1.797 \| good	0.268 \| good
2026-07-27T12:00:00.000Z	17 \| good	3.479 \| good	13.609 \| good	18.359 \| good	0.337 \| good	1.986 \| good	0.268 \| good
2026-07-27T13:00:00.000Z	22 \| good	4.01 \| good	17.166 \| good	18.882 \| good	0.292 \| good	2.718 \| good	0.252 \| good
2026-07-27T14:00:00.000Z	17 \| good	2.755 \| good	11.156 \| good	17.783 \| good	0.347 \| good	3.472 \| good	0.257 \| good
2026-07-27T15:00:00.000Z	16 \| good	3.242 \| good	12.387 \| good	16.306 \| good	0.347 \| good	3.002 \| good	0.275 \| good
2026-07-27T16:00:00.000Z	17 \| good	3.073 \| good	10.905 \| good	18.208 \| good	0.367 \| good	3.151 \| good	0.275 \| good
2026-07-27T17:00:00.000Z	19 \| good	2.331 \| good	14.662 \| good	20.488 \| good	0.406 \| good	3.269 \| good	0.294 \| good
2026-07-27T18:00:00.000Z	20 \| good	2.941 \| good	17.414 \| good	22.078 \| good	0.426 \| good	3.577 \| good	0.309 \| good
2026-07-27T19:00:00.000Z	27 \| good	5.41 \| good	26.103 \| good	23.591 \| good	0.421 \| good	2.886 \| good	0.292 \| good
2026-07-27T20:00:00.000Z	22 \| good	3.711 \| good	19.443 \| good	24.286 \| good	0.405 \| good	2.767 \| good	0.273 \| good
2026-07-27T21:00:00.000Z	33 \| good	6.157 \| good	24.259 \| good	25.495 \| good	0.416 \| good	2.475 \| good	0.309 \| good
2026-07-27T22:00:00.000Z	27 \| good	4.987 \| good	28.526 \| good	27.402 \| good	0.479 \| good	2.109 \| good	0.309 \| good
2026-07-27T23:00:00.000Z	27 \| good	3.506 \| good	14.503 \| good	29.089 \| good	0.368 \| good	1.908 \| good	0.309 \| good
2026-07-28T00:00:00.000Z	27 \| good	3.105 \| good	16.02 \| good	29.11 \| good	0.455 \| good	1.138 \| good	0.309 \| good
2026-07-28T01:00:00.000Z	28 \| good	3.104 \| good	13.949 \| good	30.287 \| good	0.466 \| good	1.256 \| good	0.309 \| good
2026-07-28T02:00:00.000Z	28 \| good	3.559 \| good	17.5 \| good	29.938 \| good	0.412 \| good	2.122 \| good	0.309 \| good
2026-07-28T03:00:00.000Z	27 \| good	3.734 \| good	17.391 \| good	28.989 \| good	0.357 \| good	2.043 \| good	0.273 \| good
2026-07-28T04:00:00.000Z	27 \| good	4.709 \| good	22.469 \| good	28.866 \| good	0.388 \| good	2.375 \| good	0.309 \| good
2026-07-28T05:00:00.000Z	23 \| good	4.463 \| good	19.95 \| good	24.981 \| good	0.357 \| good	2.331 \| good	0.309 \| good
2026-07-28T06:00:00.000Z	38 \| good	6.765 \| good	24.434 \| good	24.314 \| good	0.321 \| good	2.765 \| good	0.273 \| good
2026-07-28T07:00:00.000Z	33 \| good	6.416 \| good	25.411 \| good	22.974 \| good	0.377 \| good	4.15 \| good	0.297 \| good
2026-07-28T08:00:00.000Z	38 \| good	6.689 \| good	19.957 \| good	23.625 \| good	0.33 \| good	3.43 \| good	0.268 \| good
2026-07-28T09:00:00.000Z	33 \| good	6.215 \| good	16.054 \| good	20.908 \| good	0.341 \| good	3.513 \| good	0.268 \| good
2026-07-28T10:00:00.000Z	33 \| good	6.469 \| good	26.04 \| good	21.303 \| good	0.331 \| good	2.611 \| good	0.268 \| good
2026-07-28T11:00:00.000Z	33 \| good	5.55 \| good	20.782 \| good	19.719 \| good	0.341 \| good	2.492 \| good	0.268 \| good
2026-07-28T12:00:00.000Z	33 \| good	5.899 \| good	24.854 \| good	19.727 \| good	0.341 \| good	1.914 \| good	0.268 \| good
2026-07-28T13:00:00.000Z	22 \| good	4.452 \| good	16.089 \| good	20.18 \| good	0.417 \| good	1.857 \| good	0.252 \| good
2026-07-28T14:00:00.000Z	27 \| good	5.405 \| good	20.043 \| good	19.202 \| good	0.376 \| good	2.462 \| good	0.303 \| good
2026-07-28T14:00:00.000Z	27 \| good	5.405 \| good	20.043 \| good	19.202 \| good	0.376 \| good	2.462 \| good	0.303 \| good
2026-07-28T15:00:00.000Z	33 \| good	6.375 \| good	27.974 \| good	17.678 \| good	0.259 \| good	2.62 \| good	0.084 \| good
2026-07-28T16:00:00.000Z	27 \| good	5.189 \| good	22.877 \| good	20.723 \| good	0.275 \| good	1.8 \| good	0.083 \| good
2026-07-28T17:00:00.000Z	27 \| good	5.049 \| good	21.877 \| good	24.724 \| good	0.299 \| good	1.354 \| good	0.084 \| good
2026-07-28T18:00:00.000Z	33 \| good	5.776 \| good	24.946 \| good	29.153 \| good	0.319 \| good	1.011 \| good	0.085 \| good
2026-07-28T19:00:00.000Z	31 \| good	5.474 \| good	23.069 \| good	33.059 \| good	0.331 \| good	0.808 \| good	0.086 \| good
2026-07-28T20:00:00.000Z	33 \| good	5.375 \| good	22.996 \| good	36.056 \| good	0.34 \| good	0.705 \| good	0.085 \| good
2026-07-28T21:00:00.000Z	35 \| good	5.386 \| good	22.997 \| good	37.575 \| good	0.347 \| good	0.648 \| good	0.085 \| good
2026-07-28T22:00:00.000Z	32 \| good	5.032 \| good	21.972 \| good	34.806 \| good	0.35 \| good	0.629 \| good	0.083 \| good
2026-07-28T23:00:00.000Z	26 \| good	3.357 \| good	14.993 \| good	28.38 \| good	0.34 \| good	0.626 \| good	0.081 \| good
2026-07-29T00:00:00.000Z	24 \| good	3.795 \| good	16.076 \| good	26.073 \| good	0.319 \| good	0.668 \| good	0.079 \| good
2026-07-29T01:00:00.000Z	23 \| good	3.439 \| good	15.02 \| good	24.872 \| good	0.292 \| good	0.823 \| good	0.078 \| good
2026-07-29T02:00:00.000Z	22 \| good	4.236 \| good	18.901 \| good	22.596 \| good	0.272 \| good	1.122 \| good	0.078 \| good
2026-07-29T03:00:00.000Z	22 \| good	4.447 \| good	18.989 \| good	21.447 \| good	0.266 \| good	1.78 \| good	0.079 \| good
2026-07-29T04:00:00.000Z	27 \| good	4.796 \| good	20.895 \| good	20.202 \| good	0.273 \| good	2.663 \| good	0.081 \| good
2026-07-29T05:00:00.000Z	22 \| good	4.237 \| good	18.902 \| good	17.897 \| good	0.275 \| good	3.711 \| good	0.085 \| good
2026-07-29T06:00:00.000Z	27 \| good	4.73 \| good	20.874 \| good	16.661 \| good	0.274 \| good	4.525 \| good	0.089 \| good
2026-07-29T07:00:00.000Z	27 \| good	4.56 \| good	19.957 \| good	16.118 \| good	0.266 \| good	5.366 \| good	0.093 \| good
2026-07-29T08:00:00.000Z	27 \| good	4.911 \| good	21.033 \| good	15.643 \| good	0.255 \| good	5.797 \| good	0.096 \| good
2026-07-29T09:00:00.000Z	27 \| good	4.635 \| good	20.005 \| good	15.218 \| good	0.247 \| good	5.948 \| good	0.096 \| good
2026-07-29T10:00:00.000Z	22 \| good	3.961 \| good	17.039 \| good	14.884 \| good	0.239 \| good	6.165 \| good	0.096 \| good
2026-07-29T11:00:00.000Z	22 \| good	4.029 \| good	17.902 \| good	14.777 \| good	0.236 \| good	6.538 \| good	0.098 \| good
2026-07-29T12:00:00.000Z	22 \| good	4.355 \| good	18.971 \| good	14.22 \| good	0.222 \| good	7.101 \| good	0.1 \| good
2026-07-29T13:00:00.000Z	27 \| good	4.547 \| good	19.898 \| good	14.495 \| good	0.21 \| good	7.498 \| good	0.102 \| good
2026-07-29T14:00:00.000Z	27 \| good	4.522 \| good	19.923 \| good	15.39 \| good	0.203 \| good	5.357 \| good	0.104 \| good
2026-07-29T15:00:00.000Z	38 \| good	6.591 \| good	29.876 \| good	16.765 \| good	0.26 \| good	3.131 \| good	0.094 \| good
2026-07-29T16:00:00.000Z	33 \| good	5.759 \| good	24.93 \| good	19.072 \| good	0.296 \| good	2.378 \| good	0.093 \| good
2026-07-29T17:00:00.000Z	27 \| good	5.273 \| good	22.856 \| good	22.402 \| good	0.338 \| good	1.779 \| good	0.094 \| good
2026-07-29T18:00:00.000Z	33 \| good	6.09 \| good	26.868 \| good	27.224 \| good	0.375 \| good	1.325 \| good	0.095 \| good
2026-07-29T19:00:00.000Z	33 \| good	6.144 \| good	26.898 \| good	32.545 \| good	0.405 \| good	1.073 \| good	0.097 \| good
2026-07-29T20:00:00.000Z	38 \| good	6.585 \| good	29.785 \| good	36.475 \| good	0.431 \| good	0.935 \| good	0.097 \| good
2026-07-29T21:00:00.000Z	38 \| good	6.689 \| good	29.843 \| good	37.085 \| good	0.441 \| good	0.831 \| good	0.098 \| good
2026-07-29T22:00:00.000Z	31 \| good	5.418 \| good	23.058 \| good	32.91 \| good	0.44 \| good	0.757 \| good	0.097 \| good
2026-07-29T23:00:00.000Z	26 \| good	3.856 \| good	16.981 \| good	28.379 \| good	0.423 \| good	0.709 \| good	0.095 \| good
2026-07-30T00:00:00.000Z	27 \| good	4.73 \| good	20.926 \| good	26.407 \| good	0.382 \| good	0.719 \| good	0.093 \| good
2026-07-30T01:00:00.000Z	27 \| good	4.936 \| good	20.998 \| good	25.774 \| good	0.329 \| good	0.856 \| good	0.092 \| good
2026-07-30T02:00:00.000Z	27 \| good	4.621 \| good	19.966 \| good	23.233 \| good	0.3 \| good	1.201 \| good	0.093 \| good
2026-07-30T03:00:00.000Z	27 \| good	5.019 \| good	21.872 \| good	20.903 \| good	0.286 \| good	1.956 \| good	0.095 \| good
2026-07-30T04:00:00.000Z	27 \| good	5.163 \| good	21.989 \| good	20.025 \| good	0.283 \| good	3.577 \| good	0.101 \| good
2026-07-30T05:00:00.000Z	27 \| good	5.332 \| good	22.976 \| good	18.184 \| good	0.286 \| good	5.022 \| good	0.107 \| good
2026-07-30T06:00:00.000Z	44 \| good	8.339 \| good	11.138 \| good	14.763 \| good	0.285 \| good	6.038 \| good	0.112 \| good
2026-07-30T07:00:00.000Z	27 \| good	5.479 \| good	23.93 \| good	17.863 \| good	0.28 \| good	6.791 \| good	0.115 \| good
2026-07-30T08:00:00.000Z	33 \| good	6.173 \| good	26.91 \| good	16.757 \| good	0.267 \| good	7.11 \| good	0.116 \| good
2026-07-30T09:00:00.000Z	27 \| good	5.365 \| good	22.935 \| good	15.745 \| good	0.256 \| good	7.155 \| good	0.116 \| good
2026-07-30T10:00:00.000Z	27 \| good	5.229 \| good	22.891 \| good	15.298 \| good	0.246 \| good	7.185 \| good	0.115 \| good
2026-07-30T11:00:00.000Z	27 \| good	5.278 \| good	22.889 \| good	15.539 \| good	0.239 \| good	7.25 \| good	0.115 \| good
2026-07-30T12:00:00.000Z	44 \| good	7.765 \| good	9.59 \| good	9.929 \| good	0.238 \| good	7.242 \| good	0.115 \| good
2026-07-30T13:00:00.000Z	44 \| good	7.819 \| good	9.54 \| good	9.43 \| good	0.232 \| good	7.437 \| good	0.116 \| good
2026-07-30T14:00:00.000Z	44 \| good	7.997 \| good	9.661 \| good	10.935 \| good	0.225 \| good	5.894 \| good	0.118 \| good

Napa, California live air quality index now

Major air pollutants in Napa, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Air quality in nearby cities

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Vallejo, California

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Vacaville, California

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Frequently asked questions

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What is the current concentration of PM2.5 in Napa, California?

What is the current concentration of PM10 in Napa, California?

What is the current concentration of carbon monoxide (CO) in Napa, California?

What is the current concentration of sulfur dioxide (SO2) in Napa, California?

What is the current concentration of ozone (O3) in Napa, California?

What is the current concentration of nitrogen dioxide (NO2) in Napa, California?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the current concentration of PM_2.5 in Napa, California?

What is the current concentration of PM₁₀ in Napa, California?

What is the current concentration of sulfur dioxide (SO₂) in Napa, California?

What is the current concentration of ozone (O₃) in Napa, California?

What is the current concentration of nitrogen dioxide (NO₂) in Napa, California?