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

The current PM10 concentration at Union City, California is 46.005 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 0.655 ppb.

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

The current ozone (O3) concentration at Union City, California is 17.142 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 8.823 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 12.315 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)

12.31 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

46.01 μg/m³

155

255

425

605+

Ozone (O₃)

17.14 ppb

201

201+

Sulfur Dioxide (SO₂)

0.66 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

8.82 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.41 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
2026-01-22T00:00:00.000Z	60 \| moderate	14.386 \| fine	56.481 \| fine	13.043 \| good	0.899 \| good	16.652 \| good	0.544 \| good
2026-01-22T01:00:00.000Z	54 \| moderate	11.317 \| good	51.514 \| good	11.36 \| good	0.859 \| good	16.739 \| good	0.498 \| good
2026-01-22T02:00:00.000Z	58 \| moderate	13.012 \| fine	59.052 \| fine	9.997 \| good	0.81 \| good	15.261 \| good	0.511 \| good
2026-01-22T03:00:00.000Z	62 \| moderate	14.514 \| fine	56.533 \| fine	7.945 \| good	0.825 \| good	20.808 \| good	0.585 \| good
2026-01-22T04:00:00.000Z	60 \| moderate	14.08 \| fine	62.782 \| fine	8.269 \| good	0.782 \| good	20.425 \| good	0.542 \| good
2026-01-22T05:00:00.000Z	60 \| moderate	13.646 \| fine	56.569 \| fine	10.214 \| good	0.795 \| good	20.108 \| good	0.512 \| good
2026-01-22T06:00:00.000Z	58 \| moderate	13.093 \| fine	46.869 \| good	8.927 \| good	0.853 \| good	20.288 \| good	0.588 \| good
2026-01-22T07:00:00.000Z	60 \| moderate	13.708 \| fine	57.935 \| fine	9.905 \| good	0.833 \| good	21.385 \| good	0.63 \| good
2026-01-22T08:00:00.000Z	64 \| moderate	15.692 \| fine	50.237 \| good	11.206 \| good	0.902 \| good	19.629 \| good	0.613 \| good
2026-01-22T09:00:00.000Z	58 \| moderate	12.543 \| fine	58.371 \| fine	10.611 \| good	0.822 \| good	19.351 \| good	0.601 \| good
2026-01-22T10:00:00.000Z	62 \| moderate	14.953 \| fine	47.316 \| good	9.175 \| good	0.828 \| good	19.052 \| good	0.54 \| good
2026-01-22T11:00:00.000Z	58 \| moderate	12.859 \| fine	55.427 \| fine	10.143 \| good	0.802 \| good	18.32 \| good	0.524 \| good
2026-01-22T12:00:00.000Z	58 \| moderate	13.224 \| fine	53.951 \| good	10.676 \| good	0.746 \| good	15.764 \| good	0.523 \| good
2026-01-22T13:00:00.000Z	56 \| moderate	11.76 \| good	56.783 \| fine	10.133 \| good	0.79 \| good	16.345 \| good	0.563 \| good
2026-01-22T14:00:00.000Z	62 \| moderate	14.665 \| fine	55.273 \| fine	11.602 \| good	0.736 \| good	15.706 \| good	0.586 \| good
2026-01-22T15:00:00.000Z	52 \| moderate	10.367 \| good	49.705 \| good	11.902 \| good	0.761 \| good	15.048 \| good	0.63 \| good
2026-01-22T16:00:00.000Z	54 \| moderate	11.129 \| good	51.228 \| good	12.63 \| good	0.761 \| good	17.398 \| good	0.707 \| good
2026-01-22T17:00:00.000Z	52 \| moderate	9.537 \| good	46.442 \| good	12.701 \| good	0.82 \| good	17.87 \| good	0.744 \| good
2026-01-22T18:00:00.000Z	58 \| moderate	12.958 \| fine	39.732 \| good	15.239 \| good	0.953 \| good	14.612 \| good	0.635 \| good
2026-01-22T19:00:00.000Z	64 \| moderate	15.961 \| fine	67.551 \| fine	16.733 \| good	0.923 \| good	15.366 \| good	0.578 \| good
2026-01-22T20:00:00.000Z	69 \| moderate	18.543 \| fine	65.471 \| fine	12.456 \| good	1.067 \| good	13.589 \| good	0.523 \| good
2026-01-22T21:00:00.000Z	64 \| moderate	16.478 \| fine	54.297 \| good	13.764 \| good	0.976 \| good	15.122 \| good	0.487 \| good
2026-01-22T22:00:00.000Z	66 \| moderate	16.672 \| fine	43.224 \| good	14.07 \| good	0.796 \| good	12.731 \| good	0.377 \| good
2026-01-22T23:00:00.000Z	56 \| moderate	12.197 \| fine	53.526 \| good	19.21 \| good	0.981 \| good	17.873 \| good	0.425 \| good
2026-01-23T00:00:00.000Z	67 \| moderate	17.955 \| fine	62.471 \| fine	19.607 \| good	0.916 \| good	12.924 \| good	0.408 \| good
2026-01-23T01:00:00.000Z	56 \| moderate	11.8 \| good	45.151 \| good	22.138 \| good	0.824 \| good	12.069 \| good	0.349 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.04 \| fine	54.347 \| good	23.535 \| good	1.505 \| good	12.164 \| good	0.394 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	11.233 \| good	44.972 \| good	21.457 \| good	0.887 \| good	17.473 \| good	0.485 \| good
2026-01-23T04:00:00.000Z	58 \| moderate	12.912 \| fine	50.172 \| good	20.869 \| good	0.7 \| good	19.35 \| good	0.408 \| good
2026-01-23T05:00:00.000Z	56 \| moderate	11.957 \| good	40.681 \| good	18.095 \| good	0.597 \| good	22.791 \| good	0.542 \| good
2026-01-23T06:00:00.000Z	60 \| moderate	14.369 \| fine	53.381 \| good	16.6 \| good	0.486 \| good	16.557 \| good	0.478 \| good
2026-01-23T07:00:00.000Z	54 \| moderate	11.315 \| good	60.172 \| fine	11.705 \| good	0.432 \| good	19.375 \| good	0.533 \| good
2026-01-23T08:00:00.000Z	60 \| moderate	14.256 \| fine	48.357 \| good	11.763 \| good	0.456 \| good	19.819 \| good	0.478 \| good
2026-01-23T09:00:00.000Z	67 \| moderate	18.19 \| fine	49.496 \| good	10.866 \| good	0.492 \| good	18.192 \| good	0.432 \| good
2026-01-23T10:00:00.000Z	64 \| moderate	15.744 \| fine	55.283 \| fine	12.041 \| good	0.551 \| good	16.352 \| good	0.457 \| good
2026-01-23T11:00:00.000Z	63 \| moderate	15.419 \| fine	78.502 \| fine	10.016 \| good	0.524 \| good	16.02 \| good	0.459 \| good
2026-01-23T12:00:00.000Z	58 \| moderate	12.725 \| fine	50.487 \| good	10.512 \| good	0.381 \| good	13.519 \| good	0.448 \| good
2026-01-23T13:00:00.000Z	56 \| moderate	11.743 \| good	51.259 \| good	11.042 \| good	0.904 \| good	12.649 \| good	0.316 \| good
2026-01-23T14:00:00.000Z	52 \| moderate	10.457 \| good	40.331 \| good	11.614 \| good	0.849 \| good	12.925 \| good	0.316 \| good
2026-01-23T15:00:00.000Z	56 \| moderate	11.95 \| good	42.01 \| good	13.474 \| good	0.847 \| good	12.313 \| good	0.374 \| good
2026-01-23T16:00:00.000Z	56 \| moderate	12.087 \| good	44.702 \| good	15.646 \| good	0.669 \| good	11.733 \| good	0.374 \| good
2026-01-23T17:00:00.000Z	58 \| moderate	11.014 \| good	69.114 \| fine	16.64 \| good	0.604 \| good	10.876 \| good	0.376 \| good
2026-01-23T18:00:00.000Z	54 \| moderate	11.069 \| good	47.96 \| good	16.815 \| good	0.648 \| good	9.517 \| good	0.314 \| good
2026-01-23T19:00:00.000Z	54 \| moderate	10.875 \| good	50.456 \| good	15.969 \| good	0.774 \| good	8.273 \| good	0.358 \| good
2026-01-23T20:00:00.000Z	54 \| moderate	10.548 \| good	35.176 \| good	15.518 \| good	0.884 \| good	8.004 \| good	0.317 \| good
2026-01-23T21:00:00.000Z	54 \| moderate	10.801 \| good	51.039 \| good	15.996 \| good	0.741 \| good	9.461 \| good	0.389 \| good
2026-01-23T22:00:00.000Z	56 \| moderate	12.389 \| fine	45.795 \| good	16.759 \| good	0.653 \| good	8.676 \| good	0.389 \| good
2026-01-23T23:00:00.000Z	56 \| moderate	12.315 \| fine	46.005 \| good	17.142 \| good	0.655 \| good	8.823 \| good	0.408 \| good
2026-01-24T00:00:00.000Z	88 \| moderate	29.224 \| fine	126.462 \| fine	23.44 \| good	3.409 \| good	13.419 \| good	0.244 \| good
2026-01-24T01:00:00.000Z	82 \| moderate	26.255 \| fine	114.485 \| fine	10.815 \| good	3.432 \| good	19.435 \| good	0.302 \| good
2026-01-24T02:00:00.000Z	86 \| moderate	28.266 \| fine	122.396 \| fine	10.129 \| good	3.454 \| good	25.451 \| good	0.361 \| good
2026-01-24T03:00:00.000Z	82 \| moderate	26.149 \| fine	114.237 \| fine	10.939 \| good	3.476 \| good	31.468 \| good	0.419 \| good
2026-01-24T04:00:00.000Z	81 \| moderate	25.22 \| fine	109.604 \| fine	11.822 \| good	3.769 \| good	31.634 \| good	0.45 \| good
2026-01-24T05:00:00.000Z	79 \| moderate	24.021 \| fine	104.786 \| fine	11.187 \| good	4.062 \| good	31.799 \| good	0.482 \| good
2026-01-24T06:00:00.000Z	79 \| moderate	24.281 \| fine	106.345 \| fine	11.237 \| good	4.355 \| good	31.965 \| good	0.513 \| good
2026-01-24T07:00:00.000Z	79 \| moderate	24.05 \| fine	105.013 \| fine	9.703 \| good	4.134 \| good	30.829 \| good	0.503 \| good
2026-01-24T08:00:00.000Z	77 \| moderate	22.51 \| fine	98.689 \| fine	11.514 \| good	3.913 \| good	29.693 \| good	0.493 \| good
2026-01-24T09:00:00.000Z	75 \| moderate	22.478 \| fine	98.441 \| fine	11.146 \| good	3.692 \| good	28.556 \| good	0.483 \| good
2026-01-24T10:00:00.000Z	71 \| moderate	20.039 \| fine	88.293 \| fine	13.304 \| good	3.394 \| good	26.745 \| good	0.465 \| good
2026-01-24T11:00:00.000Z	66 \| moderate	17.358 \| fine	76.99 \| fine	15.67 \| good	3.097 \| good	24.934 \| good	0.448 \| good
2026-01-24T12:00:00.000Z	62 \| moderate	14.949 \| fine	66.927 \| fine	13.426 \| good	2.8 \| good	23.123 \| good	0.43 \| good
2026-01-24T13:00:00.000Z	56 \| moderate	11.637 \| good	51.884 \| good	12.763 \| good	2.858 \| good	22.955 \| good	0.4 \| good
2026-01-24T14:00:00.000Z	27 \| good	5.007 \| good	21.857 \| good	14.997 \| good	2.916 \| good	22.787 \| good	0.37 \| good
2026-01-24T15:00:00.000Z	33 \| good	5.969 \| good	26.148 \| good	17.04 \| good	2.975 \| good	22.618 \| good	0.34 \| good
2026-01-24T16:00:00.000Z	27 \| good	5.256 \| good	23.249 \| good	21.102 \| good	2.484 \| good	19.005 \| good	0.302 \| good
2026-01-24T17:00:00.000Z	33 \| good	5.902 \| good	25.824 \| good	26.84 \| good	1.994 \| good	15.391 \| good	0.264 \| good
2026-01-24T18:00:00.000Z	33 \| good	5.795 \| good	25.466 \| good	27.836 \| good	1.504 \| good	11.778 \| good	0.226 \| good
2026-01-24T19:00:00.000Z	33 \| good	6.473 \| good	28.725 \| good	28.813 \| good	1.287 \| good	9.117 \| good	0.198 \| good
2026-01-24T20:00:00.000Z	30 \| good	4.557 \| good	19.906 \| good	31.534 \| good	1.07 \| good	6.456 \| good	0.171 \| good
2026-01-24T21:00:00.000Z	30 \| good	2.382 \| good	9.668 \| good	32.29 \| good	0.854 \| good	3.795 \| good	0.143 \| good
2026-01-24T22:00:00.000Z	30 \| good	1.319 \| good	5.339 \| good	32.371 \| good	0.84 \| good	4.087 \| good	0.143 \| good
2026-01-24T23:00:00.000Z	30 \| good	1.62 \| good	6.706 \| good	32.178 \| good	0.827 \| good	4.378 \| good	0.142 \| good
2026-01-25T00:00:00.000Z	30 \| good	2.252 \| good	9.122 \| good	31.528 \| good	0.814 \| good	4.67 \| good	0.142 \| good
2026-01-25T01:00:00.000Z	25 \| good	1.909 \| good	8.075 \| good	26.648 \| good	0.98 \| good	12.034 \| good	0.186 \| good
2026-01-25T02:00:00.000Z	21 \| good	2.973 \| good	12.488 \| good	22.706 \| good	1.146 \| good	19.398 \| good	0.23 \| good
2026-01-25T03:00:00.000Z	25 \| good	3.43 \| good	14.386 \| good	22.954 \| good	1.311 \| good	26.762 \| good	0.274 \| good
2026-01-25T04:00:00.000Z	25 \| good	4.051 \| good	17.533 \| good	22.087 \| good	1.387 \| good	27.167 \| good	0.281 \| good
2026-01-25T05:00:00.000Z	33 \| good	5.637 \| good	24.542 \| good	21.045 \| good	1.463 \| good	27.573 \| good	0.288 \| good
2026-01-25T06:00:00.000Z	27 \| good	5.105 \| good	22.367 \| good	20.703 \| good	1.539 \| good	27.978 \| good	0.295 \| good
2026-01-25T07:00:00.000Z	25 \| good	4.242 \| good	18.555 \| good	21.148 \| good	1.388 \| good	26.886 \| good	0.292 \| good
2026-01-25T08:00:00.000Z	27 \| good	5.058 \| good	22.141 \| good	21.652 \| good	1.237 \| good	25.795 \| good	0.29 \| good
2026-01-25T09:00:00.000Z	33 \| good	5.636 \| good	24.349 \| good	21.572 \| good	1.086 \| good	24.703 \| good	0.287 \| good
2026-01-25T10:00:00.000Z	27 \| good	5.236 \| good	22.795 \| good	21.288 \| good	0.998 \| good	23.408 \| good	0.275 \| good
2026-01-25T11:00:00.000Z	44 \| good	8.124 \| good	35.819 \| good	20.44 \| good	0.91 \| good	22.113 \| good	0.262 \| good
2026-01-25T12:00:00.000Z	38 \| good	7.316 \| good	32.047 \| good	19.578 \| good	0.822 \| good	20.817 \| good	0.25 \| good
2026-01-25T13:00:00.000Z	33 \| good	6.1 \| good	26.735 \| good	19.085 \| good	0.906 \| good	20.894 \| good	0.25 \| good
2026-01-25T14:00:00.000Z	20 \| good	2.937 \| good	12.357 \| good	19.131 \| good	0.991 \| good	20.97 \| good	0.249 \| good
2026-01-25T15:00:00.000Z	22 \| good	3.902 \| good	17.053 \| good	19.003 \| good	1.075 \| good	21.047 \| good	0.249 \| good
2026-01-25T16:00:00.000Z	22 \| good	4.312 \| good	19.047 \| good	19.3 \| good	1.185 \| good	19.276 \| good	0.256 \| good
2026-01-25T17:00:00.000Z	38 \| good	7.302 \| good	32.266 \| good	18.848 \| good	1.294 \| good	17.505 \| good	0.264 \| good
2026-01-25T18:00:00.000Z	38 \| good	7.393 \| good	32.73 \| good	21.128 \| good	1.403 \| good	15.734 \| good	0.272 \| good
2026-01-25T19:00:00.000Z	44 \| good	8 \| good	35.104 \| good	23.081 \| good	1.476 \| good	13.396 \| good	0.25 \| good
2026-01-25T20:00:00.000Z	44 \| good	7.604 \| good	33.4 \| good	22.268 \| good	1.549 \| good	11.057 \| good	0.228 \| good
2026-01-25T21:00:00.000Z	38 \| good	7.433 \| good	32.919 \| good	23.221 \| good	1.621 \| good	8.719 \| good	0.206 \| good
2026-01-25T22:00:00.000Z	38 \| good	7.164 \| good	31.727 \| good	25.029 \| good	1.646 \| good	10.419 \| good	0.213 \| good
2026-01-25T23:00:00.000Z	44 \| good	8.366 \| good	36.523 \| good	26.834 \| good	1.672 \| good	12.119 \| good	0.219 \| good

Union City

Get reliable air quality data to drive your business

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

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 09:00:00 on 2026-01-23.

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 02:00:00 on 2026-01-23.

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

The current air quality in Union City, California is 56, 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 12.315 μg/m³.

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

The current PM₁₀ concentration at Union City, California is 46.005 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 0.408 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 0.655 ppb.

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

The current ozone (O₃) concentration at Union City, California is 17.142 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 8.823 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions