What is the current concentration of PM10 in Union City, California?

The current PM10 concentration at Union City, California is 26.716 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Union City, California is 0.733 ppb.

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

The current ozone (O3) concentration at Union City, California is 22.377 ppm.

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

The current nitrogen dioxide (NO2) concentration at Union City, California is 4.382 ppb.

Union City, California live air quality index now

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

The current PM2.5 concentration at Union City, California is 7.534 μg/m3.

Stay updated with real-time air quality in Union City, 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

Union City, California

Last updated: ... (Local time)

Major air pollutants in Union City, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

7.53 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

26.72 μg/m³

155

255

425

605+

Ozone (O₃)

22.38 ppb

201

201+

Sulfur Dioxide (SO₂)

0.73 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.38 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.23 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Union City, California

Scroll To Air Quality Map

Track live Union City, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-08-10T19:00:00.000Z	60 \| moderate	13.593 \| fine	54.232 \| good	20.399 \| good	0.441 \| good	4.034 \| good	0.261 \| good
2026-08-10T20:00:00.000Z	52 \| moderate	9.713 \| good	43.567 \| good	32.556 \| good	0.549 \| good	1.74 \| good	0.108 \| good
2026-08-10T21:00:00.000Z	49 \| good	9.436 \| good	41.837 \| good	32.797 \| good	0.514 \| good	1.42 \| good	0.106 \| good
2026-08-10T22:00:00.000Z	49 \| good	9.005 \| good	39.79 \| good	30.926 \| good	0.487 \| good	1.343 \| good	0.106 \| good
2026-08-10T23:00:00.000Z	44 \| good	7.877 \| good	34.448 \| good	28.166 \| good	0.46 \| good	1.419 \| good	0.107 \| good
2026-08-11T00:00:00.000Z	44 \| good	7.864 \| good	34.433 \| good	25.163 \| good	0.448 \| good	1.604 \| good	0.105 \| good
2026-08-11T01:00:00.000Z	44 \| good	7.713 \| good	34.19 \| good	21.884 \| good	0.464 \| good	2.372 \| good	0.109 \| good
2026-08-11T02:00:00.000Z	44 \| good	7.549 \| good	33.156 \| good	18.869 \| good	0.485 \| good	3.419 \| good	0.113 \| good
2026-08-11T03:00:00.000Z	44 \| good	7.946 \| good	34.776 \| good	16.929 \| good	0.513 \| good	4.604 \| good	0.116 \| good
2026-08-11T04:00:00.000Z	38 \| good	7.304 \| good	31.856 \| good	15.111 \| good	0.547 \| good	5.314 \| good	0.119 \| good
2026-08-11T05:00:00.000Z	38 \| good	7.317 \| good	31.903 \| good	15.844 \| good	0.576 \| good	6.033 \| good	0.122 \| good
2026-08-11T06:00:00.000Z	38 \| good	7.024 \| good	30.947 \| good	16.451 \| good	0.588 \| good	7.738 \| good	0.128 \| good
2026-08-11T07:00:00.000Z	56 \| moderate	12.267 \| fine	54.35 \| good	21.532 \| good	0.347 \| good	4.221 \| good	0.244 \| good
2026-08-11T08:00:00.000Z	54 \| moderate	10.905 \| good	43.924 \| good	21.334 \| good	0.366 \| good	3.977 \| good	0.227 \| good
2026-08-11T09:00:00.000Z	60 \| moderate	13.608 \| fine	59.948 \| fine	20.413 \| good	0.384 \| good	3.915 \| good	0.208 \| good
2026-08-11T10:00:00.000Z	54 \| moderate	10.627 \| good	39.017 \| good	20.959 \| good	0.393 \| good	4.396 \| good	0.209 \| good
2026-08-11T11:00:00.000Z	52 \| moderate	9.709 \| good	44.658 \| good	20.095 \| good	0.411 \| good	3.742 \| good	0.209 \| good
2026-08-11T12:00:00.000Z	49 \| good	8.51 \| good	31.858 \| good	20.012 \| good	0.413 \| good	3.767 \| good	0.209 \| good
2026-08-11T13:00:00.000Z	49 \| good	8.891 \| good	37.213 \| good	19.227 \| good	0.468 \| good	4.388 \| good	0.223 \| good
2026-08-11T14:00:00.000Z	52 \| moderate	10.492 \| good	45.706 \| good	19.918 \| good	0.468 \| good	5.191 \| good	0.273 \| good
2026-08-11T15:00:00.000Z	52 \| moderate	9.754 \| good	37.788 \| good	18.384 \| good	0.581 \| good	5.442 \| good	0.277 \| good
2026-08-11T16:00:00.000Z	54 \| moderate	10.533 \| good	46.456 \| good	19.561 \| good	0.545 \| good	4.518 \| good	0.226 \| good
2026-08-11T17:00:00.000Z	52 \| moderate	9.916 \| good	44.306 \| good	21.425 \| good	0.611 \| good	4.02 \| good	0.227 \| good
2026-08-11T18:00:00.000Z	54 \| moderate	10.904 \| good	52.41 \| good	23.277 \| good	0.493 \| good	4.093 \| good	0.243 \| good
2026-08-11T19:00:00.000Z	58 \| moderate	12.661 \| fine	46.168 \| good	25.343 \| good	0.565 \| good	4.61 \| good	0.243 \| good
2026-08-11T20:00:00.000Z	56 \| moderate	12.085 \| good	52.507 \| good	29.451 \| good	0.656 \| good	4.164 \| good	0.243 \| good
2026-08-11T21:00:00.000Z	44 \| good	8.24 \| good	38.207 \| good	33.821 \| good	0.563 \| good	4.71 \| good	0.279 \| good
2026-08-11T22:00:00.000Z	54 \| moderate	10.674 \| good	44.405 \| good	34.461 \| good	0.413 \| good	4.736 \| good	0.262 \| good
2026-08-11T23:00:00.000Z	49 \| good	9.048 \| good	48.214 \| good	33.7 \| good	0.489 \| good	3.672 \| good	0.244 \| good
2026-08-12T00:00:00.000Z	38 \| good	6.954 \| good	33.09 \| good	32.754 \| good	0.525 \| good	3.131 \| good	0.244 \| good
2026-08-12T01:00:00.000Z	33 \| good	6.181 \| good	34.056 \| good	31.766 \| good	0.509 \| good	3.006 \| good	0.244 \| good
2026-08-12T02:00:00.000Z	38 \| good	6.993 \| good	41.174 \| good	29.917 \| good	0.493 \| good	3.204 \| good	0.244 \| good
2026-08-12T03:00:00.000Z	44 \| good	8.014 \| good	34.934 \| good	18.026 \| good	0.447 \| good	4.445 \| good	0.091 \| good
2026-08-12T04:00:00.000Z	38 \| good	7.206 \| good	28.766 \| good	24.999 \| good	0.345 \| good	3.464 \| good	0.226 \| good
2026-08-12T05:00:00.000Z	33 \| good	6.224 \| good	35.352 \| good	22.986 \| good	0.391 \| good	4.436 \| good	0.244 \| good
2026-08-12T06:00:00.000Z	38 \| good	6.542 \| good	28.848 \| good	21.907 \| good	0.391 \| good	3.675 \| good	0.244 \| good
2026-08-12T07:00:00.000Z	33 \| good	5.712 \| good	25.918 \| good	19.709 \| good	0.392 \| good	3.959 \| good	0.244 \| good
2026-08-12T08:00:00.000Z	33 \| good	5.502 \| good	21.032 \| good	17.977 \| good	0.366 \| good	3.723 \| good	0.209 \| good
2026-08-12T09:00:00.000Z	27 \| good	5.447 \| good	23.735 \| good	17.627 \| good	0.411 \| good	3.519 \| good	0.209 \| good
2026-08-12T10:00:00.000Z	33 \| good	5.991 \| good	21.266 \| good	17.705 \| good	0.405 \| good	3.354 \| good	0.191 \| good
2026-08-12T11:00:00.000Z	22 \| good	4.237 \| good	15.052 \| good	17.705 \| good	0.404 \| good	3.105 \| good	0.191 \| good
2026-08-12T12:00:00.000Z	27 \| good	5.428 \| good	20.978 \| good	17.664 \| good	0.499 \| good	2.745 \| good	0.191 \| good
2026-08-12T13:00:00.000Z	27 \| good	5.148 \| good	21.177 \| good	17.541 \| good	0.352 \| good	3.411 \| good	0.222 \| good
2026-08-12T14:00:00.000Z	33 \| good	6.209 \| good	19.828 \| good	17.651 \| good	0.619 \| good	5.279 \| good	0.226 \| good
2026-08-12T15:00:00.000Z	27 \| good	5.346 \| good	21.981 \| good	17.557 \| good	0.697 \| good	4.562 \| good	0.24 \| good
2026-08-12T16:00:00.000Z	33 \| good	5.937 \| good	23.392 \| good	17.064 \| good	0.793 \| good	4.626 \| good	0.24 \| good
2026-08-12T17:00:00.000Z	38 \| good	7.091 \| good	31.346 \| good	19.661 \| good	0.776 \| good	4.023 \| good	0.24 \| good
2026-08-12T18:00:00.000Z	44 \| good	7.534 \| good	26.716 \| good	22.377 \| good	0.733 \| good	4.382 \| good	0.227 \| good
2026-08-12T18:00:00.000Z	44 \| good	7.534 \| good	26.716 \| good	22.377 \| good	0.733 \| good	4.382 \| good	0.227 \| good
2026-08-12T19:00:00.000Z	49 \| good	9.393 \| good	41.926 \| good	31.96 \| good	0.486 \| good	2.083 \| good	0.127 \| good
2026-08-12T20:00:00.000Z	52 \| moderate	10.086 \| good	44.679 \| good	34.382 \| good	0.448 \| good	1.579 \| good	0.119 \| good
2026-08-12T21:00:00.000Z	49 \| good	8.669 \| good	37.833 \| good	31.878 \| good	0.422 \| good	1.301 \| good	0.112 \| good
2026-08-12T22:00:00.000Z	44 \| good	8.241 \| good	35.994 \| good	31.277 \| good	0.413 \| good	1.218 \| good	0.107 \| good
2026-08-12T23:00:00.000Z	38 \| good	7.122 \| good	31.242 \| good	29.551 \| good	0.423 \| good	1.313 \| good	0.106 \| good
2026-08-13T00:00:00.000Z	38 \| good	7.43 \| good	32.347 \| good	26.299 \| good	0.457 \| good	1.65 \| good	0.111 \| good
2026-08-13T01:00:00.000Z	38 \| good	6.945 \| good	30.393 \| good	23.815 \| good	0.492 \| good	2.339 \| good	0.119 \| good
2026-08-13T02:00:00.000Z	38 \| good	7.471 \| good	33.209 \| good	21.576 \| good	0.531 \| good	3.383 \| good	0.13 \| good
2026-08-13T03:00:00.000Z	38 \| good	6.814 \| good	30.181 \| good	19.871 \| good	0.581 \| good	4.541 \| good	0.142 \| good
2026-08-13T04:00:00.000Z	27 \| good	5.189 \| good	22.171 \| good	21.552 \| good	0.63 \| good	5.548 \| good	0.151 \| good
2026-08-13T05:00:00.000Z	33 \| good	5.596 \| good	24.389 \| good	19.478 \| good	0.662 \| good	6.051 \| good	0.157 \| good
2026-08-13T06:00:00.000Z	33 \| good	5.792 \| good	25.332 \| good	16.699 \| good	0.672 \| good	5.983 \| good	0.158 \| good
2026-08-13T07:00:00.000Z	38 \| good	7.091 \| good	31.092 \| good	15.24 \| good	0.655 \| good	5.513 \| good	0.154 \| good
2026-08-13T08:00:00.000Z	38 \| good	7.392 \| good	32.808 \| good	15.286 \| good	0.621 \| good	4.776 \| good	0.146 \| good
2026-08-13T09:00:00.000Z	38 \| good	6.863 \| good	30.75 \| good	16.704 \| good	0.591 \| good	4.198 \| good	0.138 \| good
2026-08-13T10:00:00.000Z	33 \| good	6.265 \| good	27.873 \| good	17.357 \| good	0.559 \| good	3.756 \| good	0.13 \| good
2026-08-13T11:00:00.000Z	33 \| good	5.622 \| good	24.005 \| good	18.335 \| good	0.528 \| good	3.532 \| good	0.123 \| good
2026-08-13T12:00:00.000Z	27 \| good	4.895 \| good	20.867 \| good	19.768 \| good	0.506 \| good	3.534 \| good	0.12 \| good
2026-08-13T13:00:00.000Z	33 \| good	6.269 \| good	27.738 \| good	18.131 \| good	0.47 \| good	3.597 \| good	0.118 \| good
2026-08-13T14:00:00.000Z	33 \| good	6.238 \| good	27.949 \| good	22.74 \| good	0.447 \| good	3.487 \| good	0.119 \| good
2026-08-13T15:00:00.000Z	33 \| good	6.41 \| good	28.265 \| good	24.655 \| good	0.43 \| good	2.839 \| good	0.12 \| good
2026-08-13T16:00:00.000Z	33 \| good	6.205 \| good	27.192 \| good	24.816 \| good	0.375 \| good	2.249 \| good	0.117 \| good
2026-08-13T17:00:00.000Z	33 \| good	6.105 \| good	27.116 \| good	26.303 \| good	0.347 \| good	1.878 \| good	0.115 \| good
2026-08-13T18:00:00.000Z	38 \| good	7.308 \| good	32.174 \| good	28.343 \| good	0.351 \| good	1.563 \| good	0.115 \| good
2026-08-13T19:00:00.000Z	44 \| good	7.525 \| good	33.301 \| good	30.061 \| good	0.362 \| good	1.209 \| good	0.111 \| good
2026-08-13T20:00:00.000Z	38 \| good	7.247 \| good	32.13 \| good	31.652 \| good	0.365 \| good	0.921 \| good	0.103 \| good
2026-08-13T21:00:00.000Z	33 \| good	6.015 \| good	26.976 \| good	29.008 \| good	0.36 \| good	0.797 \| good	0.094 \| good
2026-08-13T22:00:00.000Z	33 \| good	6.311 \| good	28.167 \| good	28.299 \| good	0.347 \| good	0.788 \| good	0.088 \| good
2026-08-13T23:00:00.000Z	33 \| good	5.863 \| good	25.34 \| good	27.323 \| good	0.33 \| good	0.826 \| good	0.081 \| good
2026-08-14T00:00:00.000Z	33 \| good	6.15 \| good	27.207 \| good	23.473 \| good	0.314 \| good	1.022 \| good	0.078 \| good
2026-08-14T01:00:00.000Z	33 \| good	5.63 \| good	24.298 \| good	22.397 \| good	0.303 \| good	1.448 \| good	0.078 \| good
2026-08-14T02:00:00.000Z	33 \| good	6.025 \| good	27.011 \| good	19.684 \| good	0.297 \| good	2.133 \| good	0.081 \| good
2026-08-14T03:00:00.000Z	33 \| good	6.237 \| good	27.934 \| good	17.076 \| good	0.287 \| good	2.675 \| good	0.082 \| good
2026-08-14T04:00:00.000Z	33 \| good	6.065 \| good	26.972 \| good	16.127 \| good	0.302 \| good	2.999 \| good	0.084 \| good
2026-08-14T05:00:00.000Z	33 \| good	6.076 \| good	27.035 \| good	15.438 \| good	0.318 \| good	3.099 \| good	0.084 \| good
2026-08-14T06:00:00.000Z	27 \| good	5.474 \| good	23.369 \| good	15.558 \| good	0.336 \| good	3.403 \| good	0.083 \| good
2026-08-14T07:00:00.000Z	27 \| good	5.342 \| good	23.083 \| good	16.176 \| good	0.344 \| good	3.46 \| good	0.082 \| good
2026-08-14T08:00:00.000Z	27 \| good	4.664 \| good	20.134 \| good	17.465 \| good	0.345 \| good	3.316 \| good	0.082 \| good
2026-08-14T09:00:00.000Z	22 \| good	4.212 \| good	18.868 \| good	19.425 \| good	0.343 \| good	3.022 \| good	0.081 \| good
2026-08-14T10:00:00.000Z	22 \| good	3.819 \| good	16.92 \| good	19.413 \| good	0.35 \| good	2.857 \| good	0.08 \| good
2026-08-14T11:00:00.000Z	22 \| good	3.524 \| good	15.914 \| good	19.438 \| good	0.355 \| good	2.858 \| good	0.081 \| good
2026-08-14T12:00:00.000Z	17 \| good	2.632 \| good	10.945 \| good	17.741 \| good	0.365 \| good	2.925 \| good	0.081 \| good
2026-08-14T13:00:00.000Z	22 \| good	3.594 \| good	15.911 \| good	17.142 \| good	0.38 \| good	2.924 \| good	0.081 \| good
2026-08-14T14:00:00.000Z	22 \| good	3.63 \| good	16.046 \| good	18.23 \| good	0.394 \| good	3.108 \| good	0.081 \| good
2026-08-14T15:00:00.000Z	22 \| good	3.837 \| good	16.409 \| good	19.12 \| good	0.386 \| good	2.456 \| good	0.08 \| good
2026-08-14T16:00:00.000Z	22 \| good	4.019 \| good	17.332 \| good	20.62 \| good	0.371 \| good	2.271 \| good	0.084 \| good
2026-08-14T17:00:00.000Z	22 \| good	4.243 \| good	18.36 \| good	21.155 \| good	0.369 \| good	1.995 \| good	0.088 \| good
2026-08-14T18:00:00.000Z	33 \| good	6.09 \| good	27.302 \| good	25.36 \| good	0.366 \| good	1.606 \| good	0.091 \| good

Union City

Get reliable air quality data to drive your business

Union City, California air quality map: Track AQI near you

0.24ppm

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 Union City, California updated?

The air quality for Union City, California is updated every hour.

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

The worst air quality in Union City, California in the last 24 hours was observed at 07:00:00 on 2026-08-11.

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

In the last 24 hrs, the best air quality in Union City, California was observed at 11:00:00 on 2026-08-12.

What is the current air quality in Union City, California?

The current air quality in Union City, California is 44, categorized as Good based on real-time data.

What pollutant is the most common in Union City, California?

The most common pollutant in Union City, California is PM2.5.

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

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

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

The current PM_2.5 concentration at Union City, California is 7.534 μg/m³.

What is the current concentration of PM₁₀ in Union City, California?

The current PM₁₀ concentration at Union City, California is 26.716 μg/m³.

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

The current carbon monoxide (CO) concentration at Union City, California is 0.227 ppm.

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

The current sulfur dioxide (SO₂) concentration at Union City, California is 0.733 ppb.

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

The current ozone (O₃) concentration at Union City, California is 22.377 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Union City, California is 4.382 ppb.

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