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

The current PM10 concentration at Union City, California is 80.196 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 0.419 ppb.

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

The current ozone (O3) concentration at Union City, California is 9.952 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 12.598 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 23 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)

Moderate

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)

18.05 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

74.78 μg/m³

155

255

425

605+

Ozone (O₃)

7.55 ppb

201

201+

Sulfur Dioxide (SO₂)

0.41 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

9.99 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.43 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

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

Please contact us for custom requests

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
2025-12-05T09:00:00.000Z	62 \| moderate	14.708 \| fine	67.694 \| fine	25.69 \| good	0.466 \| good	16.257 \| good	0.456 \| good
2025-12-05T10:00:00.000Z	62 \| moderate	14.827 \| fine	69.492 \| fine	24.872 \| good	0.441 \| good	14.787 \| good	0.385 \| good
2025-12-05T11:00:00.000Z	64 \| moderate	15.808 \| fine	75.043 \| fine	25.573 \| good	0.439 \| good	13.782 \| good	0.344 \| good
2025-12-05T12:00:00.000Z	58 \| moderate	13.092 \| fine	44.357 \| good	25.555 \| good	0.477 \| good	13.328 \| good	0.343 \| good
2025-12-05T13:00:00.000Z	62 \| moderate	15.111 \| fine	46.818 \| good	24.891 \| good	0.646 \| good	12.671 \| good	0.343 \| good
2025-12-05T14:00:00.000Z	66 \| moderate	16.799 \| fine	64.59 \| fine	21.641 \| good	0.45 \| good	13.643 \| good	0.405 \| good
2025-12-05T15:00:00.000Z	64 \| moderate	16.231 \| fine	49.831 \| good	20.152 \| good	0.471 \| good	14.019 \| good	0.463 \| good
2025-12-05T16:00:00.000Z	66 \| moderate	16.125 \| fine	85.636 \| fine	20.297 \| good	0.434 \| good	13.372 \| good	0.577 \| good
2025-12-05T17:00:00.000Z	56 \| moderate	11.645 \| good	44.997 \| good	19.862 \| good	0.431 \| good	13.475 \| good	0.724 \| good
2025-12-05T18:00:00.000Z	54 \| moderate	10.647 \| good	42.617 \| good	18.778 \| good	0.468 \| good	12.828 \| good	0.448 \| good
2025-12-05T19:00:00.000Z	58 \| moderate	12.949 \| fine	38.992 \| good	17.994 \| good	0.483 \| good	12.443 \| good	0.418 \| good
2025-12-05T20:00:00.000Z	58 \| moderate	13.137 \| fine	50.239 \| good	16.485 \| good	0.437 \| good	11.658 \| good	0.361 \| good
2025-12-05T21:00:00.000Z	58 \| moderate	12.597 \| fine	54.839 \| good	16.446 \| good	0.414 \| good	11.087 \| good	0.351 \| good
2025-12-05T22:00:00.000Z	60 \| moderate	13.966 \| fine	61.835 \| fine	16.397 \| good	0.524 \| good	10.731 \| good	0.294 \| good
2025-12-05T23:00:00.000Z	64 \| moderate	15.647 \| fine	62.67 \| fine	14.612 \| good	0.474 \| good	11.549 \| good	0.29 \| good
2025-12-06T00:00:00.000Z	66 \| moderate	16.856 \| fine	73.118 \| fine	14.517 \| good	0.501 \| good	11.439 \| good	0.281 \| good
2025-12-06T01:00:00.000Z	62 \| moderate	14.793 \| fine	63.578 \| fine	13.152 \| good	0.445 \| good	13.542 \| good	0.314 \| good
2025-12-06T02:00:00.000Z	62 \| moderate	15.097 \| fine	45.889 \| good	11.964 \| good	0.429 \| good	15.296 \| good	0.34 \| good
2025-12-06T03:00:00.000Z	73 \| moderate	20.702 \| fine	75.885 \| fine	9.414 \| good	0.38 \| good	21.196 \| good	0.459 \| good
2025-12-06T04:00:00.000Z	75 \| moderate	21.674 \| fine	82.228 \| fine	12.051 \| good	0.433 \| good	18.428 \| good	0.487 \| good
2025-12-06T05:00:00.000Z	71 \| moderate	20.015 \| fine	90.848 \| fine	11.071 \| good	0.444 \| good	16.805 \| good	0.557 \| good
2025-12-06T06:00:00.000Z	75 \| moderate	22.3 \| fine	94.322 \| fine	11.655 \| good	0.462 \| good	16.665 \| good	0.604 \| good
2025-12-06T07:00:00.000Z	77 \| moderate	22.908 \| fine	106.534 \| fine	9.997 \| good	0.509 \| good	15.835 \| good	0.554 \| good
2025-12-06T08:00:00.000Z	77 \| moderate	23.349 \| fine	88.871 \| fine	10.344 \| good	0.425 \| good	15.277 \| good	0.44 \| good
2025-12-06T09:00:00.000Z	77 \| moderate	22.882 \| fine	84.471 \| fine	10.489 \| good	0.432 \| good	15.499 \| good	0.44 \| good
2025-12-06T10:00:00.000Z	73 \| moderate	20.738 \| fine	84.586 \| fine	10.778 \| good	0.914 \| good	17.922 \| good	0.422 \| good
2025-12-06T11:00:00.000Z	60 \| moderate	13.891 \| fine	48.25 \| good	10.534 \| good	0.857 \| good	16.974 \| good	0.376 \| good
2025-12-06T12:00:00.000Z	64 \| moderate	16.003 \| fine	66.39 \| fine	15.479 \| good	0.356 \| good	7.776 \| good	0.342 \| good
2025-12-06T13:00:00.000Z	54 \| moderate	11.129 \| good	42.522 \| good	7.439 \| good	0.38 \| good	7.381 \| good	0.277 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	14.243 \| fine	39.814 \| good	9.775 \| good	0.49 \| good	6.752 \| good	0.206 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	14.56 \| fine	43.953 \| good	8.447 \| good	0.401 \| good	9.475 \| good	0.253 \| good
2025-12-06T16:00:00.000Z	60 \| moderate	13.531 \| fine	60.575 \| fine	8.585 \| good	0.384 \| good	7.384 \| good	0.251 \| good
2025-12-06T17:00:00.000Z	60 \| moderate	13.794 \| fine	53.614 \| good	9.293 \| good	0.438 \| good	7.512 \| good	0.262 \| good
2025-12-06T18:00:00.000Z	62 \| moderate	15.408 \| fine	57.139 \| fine	8.655 \| good	0.491 \| good	7.241 \| good	0.324 \| good
2025-12-06T19:00:00.000Z	56 \| moderate	12.05 \| good	55.148 \| fine	10.106 \| good	0.491 \| good	6.707 \| good	0.31 \| good
2025-12-06T20:00:00.000Z	56 \| moderate	12.034 \| good	44.645 \| good	10.567 \| good	0.49 \| good	6.091 \| good	0.29 \| good
2025-12-06T21:00:00.000Z	56 \| moderate	11.762 \| good	41.259 \| good	11.436 \| good	0.562 \| good	6.553 \| good	0.333 \| good
2025-12-06T22:00:00.000Z	66 \| moderate	16.857 \| fine	74.096 \| fine	11.482 \| good	0.58 \| good	7.202 \| good	0.323 \| good
2025-12-06T23:00:00.000Z	67 \| moderate	17.731 \| fine	71.355 \| fine	13.099 \| good	0.516 \| good	7.469 \| good	0.301 \| good
2025-12-07T00:00:00.000Z	69 \| moderate	19.46 \| fine	48.202 \| good	13.527 \| good	0.486 \| good	8.363 \| good	0.3 \| good
2025-12-07T01:00:00.000Z	69 \| moderate	19.416 \| fine	66.947 \| fine	14.215 \| good	0.447 \| good	6.739 \| good	0.257 \| good
2025-12-07T02:00:00.000Z	73 \| moderate	20.503 \| fine	67.261 \| fine	12.932 \| good	0.402 \| good	7.678 \| good	0.282 \| good
2025-12-07T03:00:00.000Z	81 \| moderate	24.772 \| fine	80.249 \| fine	10.715 \| good	0.427 \| good	10.003 \| good	0.294 \| good
2025-12-07T04:00:00.000Z	75 \| moderate	21.546 \| fine	58.294 \| fine	9.975 \| good	0.396 \| good	12.76 \| good	0.389 \| good
2025-12-07T05:00:00.000Z	77 \| moderate	23 \| fine	80.196 \| fine	9.952 \| good	0.419 \| good	12.598 \| good	0.412 \| good
2025-12-07T06:00:00.000Z	75 \| moderate	21.983 \| fine	63.196 \| fine	8.197 \| good	0.421 \| good	10.971 \| good	0.442 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.055 \| fine	74.785 \| fine	7.548 \| good	0.414 \| good	9.99 \| good	0.431 \| good
2025-12-07T08:00:00.000Z	67 \| moderate	18.055 \| fine	74.785 \| fine	7.548 \| good	0.414 \| good	9.99 \| good	0.431 \| good
2025-12-07T07:00:00.000Z	81 \| moderate	24.819 \| fine	107.784 \| fine	3.757 \| good	3.732 \| good	26.514 \| good	0.602 \| good
2025-12-07T08:00:00.000Z	73 \| moderate	20.882 \| fine	91.937 \| fine	5.105 \| good	3.246 \| good	24.985 \| good	0.591 \| good
2025-12-07T09:00:00.000Z	67 \| moderate	17.639 \| fine	78.661 \| fine	7.598 \| good	2.76 \| good	23.456 \| good	0.58 \| good
2025-12-07T10:00:00.000Z	60 \| moderate	13.981 \| fine	63.053 \| fine	8.347 \| good	2.473 \| good	22.551 \| good	0.553 \| good
2025-12-07T11:00:00.000Z	52 \| moderate	10.485 \| good	46.163 \| good	8.114 \| good	2.187 \| good	21.645 \| good	0.526 \| good
2025-12-07T12:00:00.000Z	49 \| good	8.54 \| good	37.383 \| good	7.488 \| good	1.901 \| good	20.74 \| good	0.5 \| good
2025-12-07T13:00:00.000Z	33 \| good	5.548 \| good	24.408 \| good	8.271 \| good	1.89 \| good	20.974 \| good	0.497 \| good
2025-12-07T14:00:00.000Z	33 \| good	6.11 \| good	26.597 \| good	10.11 \| good	1.879 \| good	21.207 \| good	0.495 \| good
2025-12-07T15:00:00.000Z	27 \| good	5.472 \| good	23.668 \| good	9.254 \| good	1.869 \| good	21.44 \| good	0.493 \| good
2025-12-07T16:00:00.000Z	33 \| good	6.344 \| good	28.504 \| good	9.39 \| good	2.268 \| good	21.493 \| good	0.485 \| good
2025-12-07T17:00:00.000Z	33 \| good	6.413 \| good	28.427 \| good	11.104 \| good	2.668 \| good	21.545 \| good	0.477 \| good
2025-12-07T18:00:00.000Z	44 \| good	8.327 \| good	36.437 \| good	13.585 \| good	3.068 \| good	21.598 \| good	0.468 \| good
2025-12-07T19:00:00.000Z	56 \| moderate	11.548 \| good	51.067 \| good	16.085 \| good	3.388 \| good	19.789 \| good	0.393 \| good
2025-12-07T20:00:00.000Z	60 \| moderate	14.251 \| fine	63.724 \| fine	16.803 \| good	3.708 \| good	17.98 \| good	0.318 \| good
2025-12-07T21:00:00.000Z	66 \| moderate	17.161 \| fine	75.733 \| fine	13.858 \| good	4.028 \| good	16.171 \| good	0.243 \| good
2025-12-07T22:00:00.000Z	71 \| moderate	19.879 \| fine	87.013 \| fine	12.965 \| good	3.868 \| good	18.067 \| good	0.243 \| good
2025-12-07T23:00:00.000Z	75 \| moderate	21.853 \| fine	96.505 \| fine	9.092 \| good	3.708 \| good	19.962 \| good	0.243 \| good
2025-12-08T00:00:00.000Z	71 \| moderate	19.63 \| fine	86.441 \| fine	4.787 \| good	3.548 \| good	21.857 \| good	0.243 \| good
2025-12-08T01:00:00.000Z	67 \| moderate	17.763 \| fine	78.311 \| fine	3.44 \| good	3.447 \| good	24.223 \| good	0.302 \| good
2025-12-08T02:00:00.000Z	69 \| moderate	18.66 \| fine	82.372 \| fine	3.781 \| good	3.346 \| good	26.589 \| good	0.361 \| good
2025-12-08T03:00:00.000Z	75 \| moderate	21.542 \| fine	94.076 \| fine	4.412 \| good	3.244 \| good	28.955 \| good	0.42 \| good
2025-12-08T04:00:00.000Z	77 \| moderate	23.382 \| fine	101.937 \| fine	4.464 \| good	3.541 \| good	28.801 \| good	0.431 \| good
2025-12-08T05:00:00.000Z	81 \| moderate	24.507 \| fine	107.504 \| fine	4.298 \| good	3.838 \| good	28.647 \| good	0.442 \| good
2025-12-08T06:00:00.000Z	81 \| moderate	25.346 \| fine	111.259 \| fine	3.669 \| good	4.135 \| good	28.494 \| good	0.454 \| good
2025-12-08T07:00:00.000Z	81 \| moderate	25.317 \| fine	111.053 \| fine	2.281 \| good	3.922 \| good	27.311 \| good	0.447 \| good
2025-12-08T08:00:00.000Z	79 \| moderate	23.874 \| fine	103.656 \| fine	2.066 \| good	3.709 \| good	26.128 \| good	0.44 \| good
2025-12-08T09:00:00.000Z	77 \| moderate	22.908 \| fine	99.8 \| fine	2.529 \| good	3.496 \| good	24.945 \| good	0.433 \| good
2025-12-08T10:00:00.000Z	73 \| moderate	21.325 \| fine	93.647 \| fine	3.462 \| good	3.328 \| good	24.111 \| good	0.407 \| good
2025-12-08T11:00:00.000Z	69 \| moderate	19.33 \| fine	85.782 \| fine	5.639 \| good	3.161 \| good	23.277 \| good	0.381 \| good
2025-12-08T12:00:00.000Z	69 \| moderate	18.627 \| fine	82.048 \| fine	7.486 \| good	2.993 \| good	22.443 \| good	0.354 \| good
2025-12-08T13:00:00.000Z	64 \| moderate	15.595 \| fine	69.975 \| fine	6.915 \| good	2.823 \| good	21.874 \| good	0.367 \| good
2025-12-08T14:00:00.000Z	64 \| moderate	16.046 \| fine	70.662 \| fine	7.776 \| good	2.653 \| good	21.305 \| good	0.38 \| good
2025-12-08T15:00:00.000Z	62 \| moderate	15.452 \| fine	68.674 \| fine	7.185 \| good	2.483 \| good	20.736 \| good	0.393 \| good
2025-12-08T16:00:00.000Z	64 \| moderate	16.413 \| fine	72.907 \| fine	8.852 \| good	2.682 \| good	19.96 \| good	0.408 \| good
2025-12-08T17:00:00.000Z	67 \| moderate	17.796 \| fine	79.146 \| fine	8.262 \| good	2.881 \| good	19.184 \| good	0.423 \| good
2025-12-08T18:00:00.000Z	69 \| moderate	18.956 \| fine	83.342 \| fine	8.729 \| good	3.08 \| good	18.408 \| good	0.438 \| good
2025-12-08T19:00:00.000Z	69 \| moderate	19.381 \| fine	85.482 \| fine	11.192 \| good	3.531 \| good	17.464 \| good	0.371 \| good
2025-12-08T20:00:00.000Z	67 \| moderate	17.911 \| fine	79.434 \| fine	14.839 \| good	3.982 \| good	16.521 \| good	0.303 \| good
2025-12-08T21:00:00.000Z	69 \| moderate	19.197 \| fine	85.125 \| fine	10.912 \| good	4.434 \| good	15.578 \| good	0.236 \| good
2025-12-08T22:00:00.000Z	71 \| moderate	20.27 \| fine	88.796 \| fine	9.227 \| good	4.28 \| good	17.451 \| good	0.241 \| good
2025-12-08T23:00:00.000Z	73 \| moderate	20.859 \| fine	92.159 \| fine	6.367 \| good	4.125 \| good	19.325 \| good	0.246 \| good
2025-12-09T00:00:00.000Z	67 \| moderate	18.195 \| fine	80.277 \| fine	1.621 \| good	3.971 \| good	21.198 \| good	0.251 \| good
2025-12-09T01:00:00.000Z	64 \| moderate	15.721 \| fine	70.227 \| fine	1.074 \| good	4.105 \| good	24.092 \| good	0.344 \| good
2025-12-09T02:00:00.000Z	62 \| moderate	15.169 \| fine	68.486 \| fine	2.251 \| good	4.239 \| good	26.986 \| good	0.436 \| good
2025-12-09T03:00:00.000Z	58 \| moderate	13.374 \| fine	60.652 \| fine	3.495 \| good	4.373 \| good	29.88 \| good	0.528 \| good
2025-12-09T04:00:00.000Z	58 \| moderate	12.978 \| fine	57.609 \| fine	6.022 \| good	4.553 \| good	29.641 \| good	0.531 \| good
2025-12-09T05:00:00.000Z	58 \| moderate	12.796 \| fine	57.25 \| fine	7.607 \| good	4.734 \| good	29.401 \| good	0.533 \| good
2025-12-09T06:00:00.000Z	110 \| sensitive	39.017 \| moderate	41.675 \| good	0.847 \| good	4.98 \| good	29.388 \| good	0.541 \| good

Union City

Get reliable air quality data to drive your business

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

0.39ppm

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

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

View Polluted Cities

Check live rankings of places in the USA with the cleanest air.

View Clean Cities

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 03:00:00 on 2025-12-07.

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 01:00:00 on 2025-12-06.

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

The current air quality in Union City, California is 77, categorized as Moderate 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 23 μg/m³.

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

The current PM₁₀ concentration at Union City, California is 80.196 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 0.412 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 0.419 ppb.

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

The current ozone (O₃) concentration at Union City, California is 9.952 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 12.598 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions