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

The current PM10 concentration at Union City, California is 29.873 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 0.697 ppb.

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

The current ozone (O3) concentration at Union City, California is 19.108 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 10.51 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 8.596 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)

8.60 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

29.87 μg/m³

155

255

425

605+

Ozone (O₃)

19.11 ppb

201

201+

Sulfur Dioxide (SO₂)

0.70 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

10.51 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.39 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
2026-02-11T18:00:00.000Z	36 \| good	1.928 \| good	6.758 \| good	39.048 \| good	0.549 \| good	5.449 \| good	0.211 \| good
2026-02-11T19:00:00.000Z	34 \| good	1.239 \| good	6.348 \| good	37.189 \| good	0.491 \| good	4.304 \| good	0.211 \| good
2026-02-11T20:00:00.000Z	34 \| good	2.582 \| good	9.143 \| good	37.255 \| good	0.493 \| good	3.503 \| good	0.187 \| good
2026-02-11T21:00:00.000Z	33 \| good	2.108 \| good	9.324 \| good	36.18 \| good	0.469 \| good	2.765 \| good	0.183 \| good
2026-02-11T22:00:00.000Z	32 \| good	2.599 \| good	11.801 \| good	35.368 \| good	0.489 \| good	3.086 \| good	0.22 \| good
2026-02-11T23:00:00.000Z	31 \| good	4.025 \| good	14.624 \| good	33.898 \| good	0.518 \| good	2.968 \| good	0.22 \| good
2026-02-12T00:00:00.000Z	31 \| good	1.817 \| good	9.454 \| good	33.046 \| good	0.541 \| good	3.051 \| good	0.23 \| good
2026-02-12T01:00:00.000Z	30 \| good	2.328 \| good	14.861 \| good	32.225 \| good	0.521 \| good	3.076 \| good	0.23 \| good
2026-02-12T02:00:00.000Z	28 \| good	2.988 \| good	11.203 \| good	30.432 \| good	0.458 \| good	3.411 \| good	0.23 \| good
2026-02-12T03:00:00.000Z	29 \| good	3.425 \| good	18.14 \| good	30.809 \| good	0.484 \| good	4.056 \| good	0.214 \| good
2026-02-12T04:00:00.000Z	30 \| good	3.364 \| good	15.242 \| good	31.853 \| good	0.481 \| good	5.304 \| good	0.253 \| good
2026-02-12T05:00:00.000Z	30 \| good	3.685 \| good	15.139 \| good	31.63 \| good	0.501 \| good	5.027 \| good	0.267 \| good
2026-02-12T06:00:00.000Z	31 \| good	4.222 \| good	19.896 \| good	33.534 \| good	0.501 \| good	4.628 \| good	0.221 \| good
2026-02-12T07:00:00.000Z	31 \| good	5.29 \| good	18.695 \| good	33.737 \| good	0.508 \| good	4.845 \| good	0.221 \| good
2026-02-12T08:00:00.000Z	32 \| good	5.008 \| good	21.087 \| good	34.574 \| good	0.542 \| good	6.798 \| good	0.23 \| good
2026-02-12T09:00:00.000Z	32 \| good	4.659 \| good	20.513 \| good	34.925 \| good	0.539 \| good	6.837 \| good	0.274 \| good
2026-02-12T10:00:00.000Z	32 \| good	3.81 \| good	16.205 \| good	35.202 \| good	0.482 \| good	7.103 \| good	0.251 \| good
2026-02-12T11:00:00.000Z	32 \| good	3.591 \| good	14.172 \| good	34.501 \| good	0.481 \| good	9.523 \| good	0.241 \| good
2026-02-12T12:00:00.000Z	32 \| good	4.772 \| good	21.445 \| good	34.513 \| good	0.532 \| good	9.314 \| good	0.241 \| good
2026-02-12T13:00:00.000Z	31 \| good	3.78 \| good	16.256 \| good	34.22 \| good	0.649 \| good	7.97 \| good	0.225 \| good
2026-02-12T14:00:00.000Z	30 \| good	3.896 \| good	19.106 \| good	32.335 \| good	0.691 \| good	10.71 \| good	0.297 \| good
2026-02-12T15:00:00.000Z	28 \| good	4.324 \| good	21.368 \| good	30.399 \| good	0.589 \| good	11.612 \| good	0.388 \| good
2026-02-12T16:00:00.000Z	28 \| good	4.72 \| good	22.84 \| good	30.185 \| good	0.6 \| good	13.469 \| good	0.465 \| good
2026-02-12T17:00:00.000Z	27 \| good	3.625 \| good	13.922 \| good	29.26 \| good	0.7 \| good	14.361 \| good	0.459 \| good
2026-02-12T18:00:00.000Z	27 \| good	4.936 \| good	21.657 \| good	28.115 \| good	0.727 \| good	8.405 \| good	0.38 \| good
2026-02-12T19:00:00.000Z	38 \| good	6.61 \| good	13.637 \| good	28.22 \| good	0.752 \| good	5.557 \| good	0.298 \| good
2026-02-12T20:00:00.000Z	27 \| good	5.166 \| good	25.367 \| good	28.072 \| good	0.635 \| good	4.918 \| good	0.262 \| good
2026-02-12T21:00:00.000Z	27 \| good	4.911 \| good	20.179 \| good	28.64 \| good	0.593 \| good	5.199 \| good	0.254 \| good
2026-02-12T22:00:00.000Z	27 \| good	3.69 \| good	14.15 \| good	29.214 \| good	0.465 \| good	6.121 \| good	0.287 \| good
2026-02-12T23:00:00.000Z	28 \| good	3.446 \| good	13.868 \| good	30.46 \| good	0.444 \| good	7.407 \| good	0.296 \| good
2026-02-13T00:00:00.000Z	31 \| good	3.092 \| good	10.377 \| good	33.291 \| good	0.418 \| good	6.214 \| good	0.263 \| good
2026-02-13T01:00:00.000Z	33 \| good	5.878 \| good	27.759 \| good	34.808 \| good	0.394 \| good	6.136 \| good	0.319 \| good
2026-02-13T02:00:00.000Z	33 \| good	2.372 \| good	9.89 \| good	36.364 \| good	0.568 \| good	7.153 \| good	0.329 \| good
2026-02-13T03:00:00.000Z	33 \| good	2.489 \| good	23.077 \| good	35.971 \| good	0.543 \| good	9.352 \| good	0.353 \| good
2026-02-13T04:00:00.000Z	32 \| good	3.093 \| good	15.205 \| good	34.836 \| good	0.503 \| good	12.089 \| good	0.377 \| good
2026-02-13T05:00:00.000Z	31 \| good	4.298 \| good	13.508 \| good	32.659 \| good	0.587 \| good	13.127 \| good	0.377 \| good
2026-02-13T06:00:00.000Z	29 \| good	5.471 \| good	22.914 \| good	30.647 \| good	0.507 \| good	12.194 \| good	0.429 \| good
2026-02-13T07:00:00.000Z	33 \| good	6.425 \| good	21.701 \| good	29.628 \| good	0.511 \| good	10.235 \| good	0.32 \| good
2026-02-13T08:00:00.000Z	35 \| good	5.523 \| good	37.787 \| good	26.756 \| good	0.565 \| good	9.691 \| good	0.335 \| good
2026-02-13T09:00:00.000Z	44 \| good	7.64 \| good	29.362 \| good	24.073 \| good	0.503 \| good	11.421 \| good	0.368 \| good
2026-02-13T10:00:00.000Z	51 \| moderate	6.773 \| good	56.002 \| fine	22.178 \| good	0.516 \| good	8.492 \| good	0.379 \| good
2026-02-13T11:00:00.000Z	42 \| good	7.262 \| good	44.597 \| good	20.877 \| good	0.529 \| good	8.119 \| good	0.368 \| good
2026-02-13T12:00:00.000Z	38 \| good	6.507 \| good	15.416 \| good	20.384 \| good	0.558 \| good	7.516 \| good	0.368 \| good
2026-02-13T13:00:00.000Z	38 \| good	6.695 \| good	26.807 \| good	18.176 \| good	0.735 \| good	7.923 \| good	0.446 \| good
2026-02-13T14:00:00.000Z	33 \| good	6.255 \| good	25.733 \| good	17.655 \| good	0.917 \| good	8.856 \| good	0.375 \| good
2026-02-13T15:00:00.000Z	38 \| good	7.11 \| good	25.457 \| good	18.878 \| good	0.719 \| good	10.386 \| good	0.433 \| good
2026-02-13T16:00:00.000Z	49 \| good	8.596 \| good	29.873 \| good	19.108 \| good	0.697 \| good	10.51 \| good	0.392 \| good
2026-02-13T17:00:00.000Z	38 \| good	6.99 \| good	34.491 \| good	19.101 \| good	0.708 \| good	10.432 \| good	0.368 \| good
2026-02-13T17:00:00.000Z	49 \| good	8.596 \| good	29.873 \| good	19.108 \| good	0.697 \| good	10.51 \| good	0.392 \| good
2026-02-13T18:00:00.000Z	58 \| moderate	12.755 \| fine	57.115 \| fine	24.271 \| good	2.149 \| good	10.485 \| good	0.229 \| good
2026-02-13T19:00:00.000Z	56 \| moderate	12.173 \| fine	54.946 \| good	24.538 \| good	2.005 \| good	8.779 \| good	0.208 \| good
2026-02-13T20:00:00.000Z	52 \| moderate	9.913 \| good	44.213 \| good	28.43 \| good	1.799 \| good	6.757 \| good	0.187 \| good
2026-02-13T21:00:00.000Z	49 \| good	8.922 \| good	39.373 \| good	29.935 \| good	1.698 \| good	5.199 \| good	0.169 \| good
2026-02-13T22:00:00.000Z	44 \| good	7.904 \| good	34.304 \| good	32.999 \| good	1.581 \| good	5.101 \| good	0.165 \| good
2026-02-13T23:00:00.000Z	33 \| good	6.324 \| good	28.263 \| good	34.652 \| good	1.464 \| good	5.002 \| good	0.161 \| good
2026-02-14T00:00:00.000Z	44 \| good	7.869 \| good	34.185 \| good	31.461 \| good	1.305 \| good	4.79 \| good	0.152 \| good
2026-02-14T01:00:00.000Z	44 \| good	8.375 \| good	36.857 \| good	27.613 \| good	1.35 \| good	9.959 \| good	0.174 \| good
2026-02-14T02:00:00.000Z	44 \| good	8.356 \| good	36.903 \| good	23.237 \| good	1.396 \| good	15.127 \| good	0.196 \| good
2026-02-14T03:00:00.000Z	49 \| good	8.766 \| good	38.366 \| good	26.463 \| good	1.442 \| good	20.295 \| good	0.218 \| good
2026-02-14T04:00:00.000Z	52 \| moderate	9.579 \| good	42.867 \| good	19.985 \| good	1.584 \| good	25.345 \| good	0.262 \| good
2026-02-14T05:00:00.000Z	52 \| moderate	10.407 \| good	45.882 \| good	20.898 \| good	1.719 \| good	27.39 \| good	0.285 \| good
2026-02-14T06:00:00.000Z	54 \| moderate	11.176 \| good	49.843 \| good	20.553 \| good	1.855 \| good	29.435 \| good	0.309 \| good
2026-02-14T07:00:00.000Z	56 \| moderate	11.689 \| good	51.934 \| good	21.559 \| good	1.816 \| good	28.26 \| good	0.302 \| good
2026-02-14T08:00:00.000Z	56 \| moderate	12.211 \| fine	54.628 \| good	24.034 \| good	1.717 \| good	27.936 \| good	0.261 \| good
2026-02-14T09:00:00.000Z	56 \| moderate	12.21 \| fine	54.663 \| good	25.879 \| good	1.687 \| good	26.651 \| good	0.254 \| good
2026-02-14T10:00:00.000Z	58 \| moderate	13.159 \| fine	58.514 \| fine	25.516 \| good	1.602 \| good	25.064 \| good	0.247 \| good
2026-02-14T11:00:00.000Z	58 \| moderate	12.834 \| fine	58.135 \| fine	23.989 \| good	1.517 \| good	23.477 \| good	0.239 \| good
2026-02-14T12:00:00.000Z	58 \| moderate	12.576 \| fine	57.003 \| fine	19.924 \| good	1.421 \| good	21.821 \| good	0.253 \| good
2026-02-14T13:00:00.000Z	56 \| moderate	11.799 \| good	52.296 \| good	19.064 \| good	1.449 \| good	20.899 \| good	0.259 \| good
2026-02-14T14:00:00.000Z	54 \| moderate	10.88 \| good	48.493 \| good	15.477 \| good	1.476 \| good	19.978 \| good	0.265 \| good
2026-02-14T15:00:00.000Z	58 \| moderate	12.746 \| fine	57.301 \| fine	13.51 \| good	1.504 \| good	19.057 \| good	0.271 \| good
2026-02-14T16:00:00.000Z	64 \| moderate	16.275 \| fine	72.932 \| fine	18.982 \| good	1.83 \| good	17.388 \| good	0.243 \| good
2026-02-14T17:00:00.000Z	64 \| moderate	15.966 \| fine	71.448 \| fine	23.98 \| good	2.164 \| good	15.289 \| good	0.229 \| good
2026-02-14T18:00:00.000Z	66 \| moderate	17.326 \| fine	77.046 \| fine	27.712 \| good	2.498 \| good	13.191 \| good	0.216 \| good
2026-02-14T19:00:00.000Z	64 \| moderate	15.86 \| fine	70.884 \| fine	30.024 \| good	2.134 \| good	10.532 \| good	0.192 \| good
2026-02-14T20:00:00.000Z	58 \| moderate	12.778 \| fine	56.898 \| fine	29.914 \| good	1.703 \| good	7.771 \| good	0.171 \| good
2026-02-14T21:00:00.000Z	52 \| moderate	9.791 \| good	43.369 \| good	34.347 \| good	1.288 \| good	4.829 \| good	0.141 \| good
2026-02-14T22:00:00.000Z	38 \| good	7.113 \| good	31.446 \| good	34.39 \| good	1.085 \| good	4.435 \| good	0.137 \| good
2026-02-14T23:00:00.000Z	31 \| good	5.246 \| good	22.708 \| good	32.54 \| good	0.882 \| good	4.04 \| good	0.133 \| good
2026-02-15T00:00:00.000Z	32 \| good	4.217 \| good	18.721 \| good	35.357 \| good	0.76 \| good	3.789 \| good	0.129 \| good
2026-02-15T01:00:00.000Z	33 \| good	5.688 \| good	24.796 \| good	34.359 \| good	0.77 \| good	5.685 \| good	0.138 \| good
2026-02-15T02:00:00.000Z	44 \| good	7.853 \| good	34.049 \| good	29.638 \| good	0.781 \| good	7.581 \| good	0.146 \| good
2026-02-15T03:00:00.000Z	49 \| good	8.577 \| good	37.771 \| good	28.367 \| good	0.792 \| good	9.478 \| good	0.155 \| good
2026-02-15T04:00:00.000Z	52 \| moderate	9.632 \| good	42.757 \| good	24.969 \| good	0.779 \| good	10.158 \| good	0.157 \| good
2026-02-15T05:00:00.000Z	44 \| good	7.607 \| good	33.932 \| good	29.06 \| good	0.755 \| good	9.313 \| good	0.151 \| good
2026-02-15T06:00:00.000Z	33 \| good	6.172 \| good	27.219 \| good	30.51 \| good	0.731 \| good	8.467 \| good	0.145 \| good
2026-02-15T07:00:00.000Z	30 \| good	5.343 \| good	23.143 \| good	31.832 \| good	0.664 \| good	7.163 \| good	0.14 \| good
2026-02-15T08:00:00.000Z	28 \| good	4.711 \| good	20.839 \| good	30.225 \| good	0.607 \| good	5.636 \| good	0.134 \| good
2026-02-15T09:00:00.000Z	30 \| good	3.856 \| good	16.933 \| good	32.002 \| good	0.554 \| good	4.599 \| good	0.13 \| good
2026-02-15T10:00:00.000Z	31 \| good	3.649 \| good	15.886 \| good	32.587 \| good	0.538 \| good	4.191 \| good	0.128 \| good
2026-02-15T11:00:00.000Z	31 \| good	3.569 \| good	15.86 \| good	32.749 \| good	0.523 \| good	3.784 \| good	0.125 \| good
2026-02-15T12:00:00.000Z	32 \| good	3.395 \| good	14.871 \| good	34.549 \| good	0.497 \| good	3.572 \| good	0.125 \| good
2026-02-15T13:00:00.000Z	31 \| good	3.413 \| good	14.865 \| good	32.876 \| good	0.515 \| good	4.112 \| good	0.126 \| good
2026-02-15T14:00:00.000Z	29 \| good	1.081 \| good	4.087 \| good	30.925 \| good	0.533 \| good	4.652 \| good	0.128 \| good
2026-02-15T15:00:00.000Z	27 \| good	3.485 \| good	15.666 \| good	29.199 \| good	0.55 \| good	5.192 \| good	0.129 \| good
2026-02-15T16:00:00.000Z	29 \| good	5.329 \| good	6.621 \| good	31.027 \| good	0.559 \| good	5.219 \| good	0.131 \| good
2026-02-15T17:00:00.000Z	30 \| good	5.075 \| good	6.28 \| good	31.516 \| good	0.551 \| good	5.226 \| good	0.134 \| good

Union City

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

0.37ppm

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 10:00:00 on 2026-02-13.

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 10:00:00 on 2026-02-12.

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

The current air quality in Union City, California is 49, 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 8.596 μg/m³.

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

The current PM₁₀ concentration at Union City, California is 29.873 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 0.392 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 0.697 ppb.

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

The current ozone (O₃) concentration at Union City, California is 19.108 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 10.51 ppb.

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