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

The current PM10 concentration at Westminster, California is 54.98 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Westminster, California is 0.856 ppb.

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

The current ozone (O3) concentration at Westminster, California is 36.482 ppm.

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

The current nitrogen dioxide (NO2) concentration at Westminster, California is 20.869 ppb.

Westminster, California live air quality index now

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

The current PM2.5 concentration at Westminster, California is 18.626 μg/m3.

Stay updated with real-time air quality in Westminster, 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

Westminster, California

Last updated: ... (Local time)

Major air pollutants in Westminster, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

18.63 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

54.98 μg/m³

155

255

425

605+

Ozone (O₃)

36.48 ppb

201

201+

Sulfur Dioxide (SO₂)

0.86 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

20.87 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.48 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Westminster, California

Get Live Pollen Counts

Westminster, California

Scroll To Air Quality Map

Track live Westminster, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-06T00:00:00.000Z	33 \| good	5.727 \| good	25.106 \| good	30.698 \| good	0.492 \| good	20.718 \| good	0.362 \| good
2025-12-06T01:00:00.000Z	24 \| good	4.164 \| good	23.988 \| good	26.323 \| good	0.411 \| good	24.038 \| good	0.439 \| good
2025-12-06T02:00:00.000Z	32 \| good	4.391 \| good	28.236 \| good	19.493 \| good	0.345 \| good	33.561 \| good	0.576 \| good
2025-12-06T03:00:00.000Z	37 \| good	6.154 \| good	26.483 \| good	14.956 \| good	0.613 \| good	38.562 \| good	0.77 \| good
2025-12-06T04:00:00.000Z	52 \| moderate	9.662 \| good	36.138 \| good	11.519 \| good	0.958 \| good	39.018 \| good	0.83 \| good
2025-12-06T05:00:00.000Z	56 \| moderate	11.783 \| good	35.816 \| good	6.895 \| good	0.807 \| good	38.071 \| good	0.958 \| good
2025-12-06T06:00:00.000Z	58 \| moderate	13.344 \| fine	40.306 \| good	4.205 \| good	1.006 \| good	34.742 \| good	0.966 \| good
2025-12-06T07:00:00.000Z	58 \| moderate	13.171 \| fine	34.72 \| good	4.117 \| good	1.005 \| good	34.742 \| good	0.964 \| good
2025-12-06T08:00:00.000Z	60 \| moderate	14.143 \| fine	37.318 \| good	1.995 \| good	0.716 \| good	32.814 \| good	0.912 \| good
2025-12-06T09:00:00.000Z	62 \| moderate	14.568 \| fine	38.053 \| good	3.1 \| good	0.626 \| good	30.594 \| good	0.847 \| good
2025-12-06T10:00:00.000Z	58 \| moderate	13.426 \| fine	36.806 \| good	3.09 \| good	0.752 \| good	29.454 \| good	0.725 \| good
2025-12-06T11:00:00.000Z	58 \| moderate	13.308 \| fine	39.757 \| good	1.216 \| good	0.922 \| good	29.298 \| good	0.643 \| good
2025-12-06T12:00:00.000Z	64 \| moderate	15.972 \| fine	46.729 \| good	1.867 \| good	0.738 \| good	29.168 \| good	0.652 \| good
2025-12-06T13:00:00.000Z	58 \| moderate	13.464 \| fine	49.059 \| good	2.157 \| good	0.741 \| good	29.168 \| good	0.653 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	13.949 \| fine	47.167 \| good	3.5 \| good	0.817 \| good	28.624 \| good	0.684 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	15.392 \| fine	50.211 \| good	3.823 \| good	0.939 \| good	29.307 \| good	0.873 \| good
2025-12-06T16:00:00.000Z	60 \| moderate	14.407 \| fine	47.161 \| good	4.89 \| good	1.024 \| good	28.88 \| good	0.867 \| good
2025-12-06T17:00:00.000Z	60 \| moderate	13.54 \| fine	47.631 \| good	10.476 \| good	0.852 \| good	27.488 \| good	0.701 \| good
2025-12-06T18:00:00.000Z	54 \| moderate	10.785 \| good	40.843 \| good	17.889 \| good	0.705 \| good	22.523 \| good	0.486 \| good
2025-12-06T19:00:00.000Z	49 \| good	9.327 \| good	36.914 \| good	21.547 \| good	1.273 \| good	20.49 \| good	0.467 \| good
2025-12-06T20:00:00.000Z	49 \| good	9.324 \| good	43.973 \| good	26.296 \| good	0.994 \| good	17.654 \| good	0.46 \| good
2025-12-06T21:00:00.000Z	44 \| good	7.882 \| good	31.326 \| good	31.638 \| good	1.078 \| good	17.602 \| good	0.406 \| good
2025-12-06T22:00:00.000Z	31 \| good	5.296 \| good	22.7 \| good	33.187 \| good	0.372 \| good	13.033 \| good	0.322 \| good
2025-12-06T23:00:00.000Z	32 \| good	3.251 \| good	18.513 \| good	35.31 \| good	0.747 \| good	11.244 \| good	0.325 \| good
2025-12-07T00:00:00.000Z	33 \| good	4.39 \| good	18.965 \| good	35.543 \| good	0.797 \| good	12.625 \| good	0.325 \| good
2025-12-07T01:00:00.000Z	32 \| good	4.957 \| good	24.408 \| good	34.974 \| good	0.866 \| good	14.187 \| good	0.323 \| good
2025-12-07T02:00:00.000Z	33 \| good	5.805 \| good	24.534 \| good	31.889 \| good	0.826 \| good	18.107 \| good	0.409 \| good
2025-12-07T03:00:00.000Z	38 \| good	7.165 \| good	34.253 \| good	26.548 \| good	0.795 \| good	19.845 \| good	0.505 \| good
2025-12-07T04:00:00.000Z	49 \| good	8.63 \| good	34.85 \| good	24.368 \| good	0.961 \| good	22.155 \| good	0.552 \| good
2025-12-07T05:00:00.000Z	64 \| moderate	16.482 \| fine	42.171 \| good	22.358 \| good	0.647 \| good	28.007 \| good	0.769 \| good
2025-12-07T06:00:00.000Z	62 \| moderate	14.801 \| fine	35.889 \| good	15.993 \| good	0.891 \| good	30.615 \| good	1.041 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.448 \| fine	64.821 \| fine	15.012 \| good	0.891 \| good	30.615 \| good	1.042 \| good
2025-12-07T08:00:00.000Z	64 \| moderate	16.362 \| fine	48.245 \| good	11.904 \| good	0.992 \| good	27.268 \| good	0.902 \| good
2025-12-07T09:00:00.000Z	62 \| moderate	15.168 \| fine	39.553 \| good	6.861 \| good	0.589 \| good	25.868 \| good	0.805 \| good
2025-12-07T10:00:00.000Z	67 \| moderate	17.655 \| fine	44.814 \| good	4.468 \| good	0.936 \| good	24.712 \| good	0.707 \| good
2025-12-07T11:00:00.000Z	69 \| moderate	18.811 \| fine	40.756 \| good	3.438 \| good	0.931 \| good	24.712 \| good	0.709 \| good
2025-12-07T12:00:00.000Z	69 \| moderate	19.136 \| fine	43.718 \| good	2.996 \| good	0.927 \| good	24.712 \| good	0.712 \| good
2025-12-07T13:00:00.000Z	73 \| moderate	20.902 \| fine	61.904 \| fine	2.346 \| good	0.821 \| good	5.688 \| good	0.57 \| good
2025-12-07T14:00:00.000Z	67 \| moderate	18.194 \| fine	51.154 \| good	2.316 \| good	0.564 \| good	24.135 \| good	0.642 \| good
2025-12-07T15:00:00.000Z	64 \| moderate	16.418 \| fine	50.046 \| good	2.498 \| good	0.679 \| good	24.561 \| good	0.722 \| good
2025-12-07T16:00:00.000Z	66 \| moderate	17.189 \| fine	60.636 \| fine	2.94 \| good	0.692 \| good	23.941 \| good	0.757 \| good
2025-12-07T17:00:00.000Z	69 \| moderate	18.567 \| fine	56.702 \| fine	11.507 \| good	0.605 \| good	23.212 \| good	0.649 \| good
2025-12-07T18:00:00.000Z	69 \| moderate	18.759 \| fine	45.762 \| good	18.154 \| good	0.517 \| good	20.929 \| good	0.523 \| good
2025-12-07T19:00:00.000Z	64 \| moderate	15.689 \| fine	48.762 \| good	19.62 \| good	0.776 \| good	21.509 \| good	0.485 \| good
2025-12-07T20:00:00.000Z	62 \| moderate	15.478 \| fine	48.243 \| good	28.579 \| good	1.093 \| good	22.114 \| good	0.528 \| good
2025-12-07T21:00:00.000Z	66 \| moderate	16.959 \| fine	43.914 \| good	32.65 \| good	0.75 \| good	20.144 \| good	0.474 \| good
2025-12-07T22:00:00.000Z	69 \| moderate	18.626 \| fine	54.98 \| good	36.482 \| good	0.856 \| good	20.869 \| good	0.476 \| good
2025-12-07T23:00:00.000Z	66 \| moderate	16.955 \| fine	37.802 \| good	38.542 \| good	1.139 \| good	26.385 \| good	0.573 \| good
2025-12-07T23:00:00.000Z	69 \| moderate	18.626 \| fine	54.98 \| good	36.482 \| good	0.856 \| good	20.869 \| good	0.476 \| good
2025-12-08T00:00:00.000Z	52 \| moderate	10.429 \| good	46.48 \| good	35.416 \| good	4.817 \| good	39.145 \| good	0.355 \| good
2025-12-08T01:00:00.000Z	52 \| moderate	10.42 \| good	46.598 \| good	27.727 \| good	4.695 \| good	41.495 \| good	0.41 \| good
2025-12-08T02:00:00.000Z	56 \| moderate	12.151 \| fine	54.411 \| good	22.944 \| good	4.573 \| good	43.846 \| good	0.465 \| good
2025-12-08T03:00:00.000Z	69 \| moderate	19.417 \| fine	85.464 \| fine	13.489 \| good	4.45 \| good	46.196 \| good	0.521 \| good
2025-12-08T04:00:00.000Z	90 \| moderate	29.686 \| fine	128.727 \| fine	8.492 \| good	4.209 \| good	43.795 \| good	0.511 \| good
2025-12-08T05:00:00.000Z	102 \| sensitive	35.614 \| moderate	155.4 \| moderate	6.077 \| good	3.968 \| good	41.394 \| good	0.501 \| good
2025-12-08T06:00:00.000Z	103 \| sensitive	36.466 \| moderate	159.185 \| moderate	5.628 \| good	3.726 \| good	38.993 \| good	0.492 \| good
2025-12-08T07:00:00.000Z	105 \| sensitive	36.541 \| moderate	159.763 \| moderate	5.106 \| good	3.323 \| good	37.575 \| good	0.453 \| good
2025-12-08T08:00:00.000Z	118 \| sensitive	42.44 \| moderate	189.073 \| moderate	4.963 \| good	2.92 \| good	36.156 \| good	0.415 \| good
2025-12-08T09:00:00.000Z	122 \| sensitive	44.364 \| moderate	198.432 \| moderate	3.467 \| good	2.517 \| good	34.738 \| good	0.377 \| good
2025-12-08T10:00:00.000Z	132 \| sensitive	47.678 \| moderate	214.273 \| moderate	5.133 \| good	2.402 \| good	34.192 \| good	0.348 \| good
2025-12-08T11:00:00.000Z	144 \| sensitive	53.313 \| moderate	239.783 \| moderate	2.577 \| good	2.287 \| good	33.646 \| good	0.319 \| good
2025-12-08T12:00:00.000Z	151 \| unhealthy	56.048 \| poor	249.032 \| moderate	1.948 \| good	2.172 \| good	33.1 \| good	0.291 \| good
2025-12-08T13:00:00.000Z	158 \| unhealthy	64.843 \| poor	264.279 \| poor	1.293 \| good	2.337 \| good	32.581 \| good	0.287 \| good
2025-12-08T14:00:00.000Z	156 \| unhealthy	62.485 \| poor	261.198 \| poor	0.697 \| good	2.502 \| good	32.062 \| good	0.284 \| good
2025-12-08T15:00:00.000Z	155 \| unhealthy	60.907 \| poor	257.305 \| poor	1.131 \| good	2.667 \| good	31.543 \| good	0.281 \| good
2025-12-08T16:00:00.000Z	144 \| sensitive	53.358 \| moderate	236.445 \| moderate	2.347 \| good	2.874 \| good	28.736 \| good	0.288 \| good
2025-12-08T17:00:00.000Z	127 \| sensitive	45.529 \| moderate	201.595 \| moderate	9.671 \| good	3.081 \| good	25.929 \| good	0.295 \| good
2025-12-08T18:00:00.000Z	79 \| moderate	24.041 \| fine	105.46 \| fine	20.746 \| good	3.287 \| good	23.122 \| good	0.301 \| good
2025-12-08T19:00:00.000Z	60 \| moderate	14.482 \| fine	64.042 \| fine	27.391 \| good	3.484 \| good	23.045 \| good	0.29 \| good
2025-12-08T20:00:00.000Z	56 \| moderate	11.896 \| good	53.169 \| good	32.653 \| good	3.68 \| good	22.967 \| good	0.278 \| good
2025-12-08T21:00:00.000Z	54 \| moderate	11.292 \| good	50.187 \| good	34.223 \| good	3.876 \| good	22.89 \| good	0.266 \| good
2025-12-08T22:00:00.000Z	56 \| moderate	11.868 \| good	53.212 \| good	34.039 \| good	4.079 \| good	27.256 \| good	0.282 \| good
2025-12-08T23:00:00.000Z	52 \| moderate	10.461 \| good	46.564 \| good	31.163 \| good	4.281 \| good	31.622 \| good	0.297 \| good
2025-12-09T00:00:00.000Z	54 \| moderate	10.692 \| good	47.392 \| good	24.87 \| good	4.484 \| good	35.988 \| good	0.312 \| good
2025-12-09T01:00:00.000Z	54 \| moderate	11.329 \| good	50.702 \| good	18.361 \| good	4.483 \| good	37.582 \| good	0.341 \| good
2025-12-09T02:00:00.000Z	58 \| moderate	13.484 \| fine	60.428 \| fine	14.118 \| good	4.482 \| good	39.176 \| good	0.369 \| good
2025-12-09T03:00:00.000Z	69 \| moderate	18.908 \| fine	83.157 \| fine	3.492 \| good	4.48 \| good	40.77 \| good	0.398 \| good
2025-12-09T04:00:00.000Z	75 \| moderate	22.442 \| fine	98.363 \| fine	2.056 \| good	4.282 \| good	40.053 \| good	0.392 \| good
2025-12-09T05:00:00.000Z	71 \| moderate	20.122 \| fine	88.555 \| fine	3.408 \| good	4.083 \| good	39.336 \| good	0.385 \| good
2025-12-09T06:00:00.000Z	60 \| moderate	13.566 \| fine	60.543 \| fine	6.312 \| good	3.885 \| good	38.619 \| good	0.379 \| good
2025-12-09T07:00:00.000Z	52 \| moderate	9.517 \| good	42.085 \| good	4.653 \| good	3.216 \| good	36.408 \| good	0.344 \| good
2025-12-09T08:00:00.000Z	52 \| moderate	9.843 \| good	43.694 \| good	5.682 \| good	2.547 \| good	34.197 \| good	0.31 \| good
2025-12-09T09:00:00.000Z	54 \| moderate	11.285 \| good	49.804 \| good	3.047 \| good	1.878 \| good	31.986 \| good	0.275 \| good
2025-12-09T10:00:00.000Z	54 \| moderate	11.096 \| good	49.006 \| good	2.655 \| good	1.707 \| good	28.463 \| good	0.243 \| good
2025-12-09T11:00:00.000Z	56 \| moderate	11.989 \| good	54.09 \| good	2.335 \| good	1.537 \| good	24.941 \| good	0.211 \| good
2025-12-09T12:00:00.000Z	58 \| moderate	12.633 \| fine	56.585 \| fine	2.074 \| good	1.366 \| good	21.418 \| good	0.179 \| good
2025-12-09T13:00:00.000Z	33 \| good	6.275 \| good	27.757 \| good	1.33 \| good	1.473 \| good	21.798 \| good	0.182 \| good
2025-12-09T14:00:00.000Z	44 \| good	7.873 \| good	34.374 \| good	1.046 \| good	1.58 \| good	22.178 \| good	0.186 \| good
2025-12-09T15:00:00.000Z	38 \| good	6.548 \| good	28.909 \| good	1.463 \| good	1.686 \| good	22.558 \| good	0.189 \| good
2025-12-09T16:00:00.000Z	44 \| good	8.084 \| good	35.525 \| good	2.956 \| good	2.063 \| good	21.669 \| good	0.206 \| good
2025-12-09T17:00:00.000Z	38 \| good	7.252 \| good	32.044 \| good	5.689 \| good	2.44 \| good	20.779 \| good	0.222 \| good
2025-12-09T18:00:00.000Z	27 \| good	5.106 \| good	22.358 \| good	14.246 \| good	2.817 \| good	19.89 \| good	0.239 \| good
2025-12-09T19:00:00.000Z	27 \| good	4.685 \| good	20.29 \| good	20.311 \| good	3.206 \| good	20.063 \| good	0.23 \| good
2025-12-09T20:00:00.000Z	22 \| good	4.461 \| good	19.27 \| good	24.226 \| good	3.596 \| good	20.236 \| good	0.22 \| good
2025-12-09T21:00:00.000Z	23 \| good	4.255 \| good	18.364 \| good	25.283 \| good	3.985 \| good	20.409 \| good	0.211 \| good
2025-12-09T22:00:00.000Z	24 \| good	3.795 \| good	16.577 \| good	24.639 \| good	4.129 \| good	24.94 \| good	0.232 \| good
2025-12-09T23:00:00.000Z	27 \| good	3.152 \| good	13.816 \| good	20.231 \| good	4.272 \| good	29.471 \| good	0.254 \| good

Westminster

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Westminster, California air quality map: Track AQI near you

0.43ppm

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 Westminster, California updated?

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

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

The worst air quality in Westminster, California in the last 24 hours was observed at 01:00:00 on 2025-12-07.

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

In the last 24 hrs, the best air quality in Westminster, California was observed at 01:00:00 on 2025-12-07.

What is the current air quality in Westminster, California?

The current air quality in Westminster, California is 69, categorized as Moderate based on real-time data.

What pollutant is the most common in Westminster, California?

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

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

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

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

The current PM_2.5 concentration at Westminster, California is 18.626 μg/m³.

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

The current PM₁₀ concentration at Westminster, California is 54.98 μg/m³.

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

The current carbon monoxide (CO) concentration at Westminster, California is 0.476 ppm.

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

The current sulfur dioxide (SO₂) concentration at Westminster, California is 0.856 ppb.

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

The current ozone (O₃) concentration at Westminster, California is 36.482 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Westminster, California is 20.869 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-06T00:00:00.000Z	33 \| good	5.727 \| good	25.106 \| good	30.698 \| good	0.492 \| good	20.718 \| good	0.362 \| good
2025-12-06T01:00:00.000Z	24 \| good	4.164 \| good	23.988 \| good	26.323 \| good	0.411 \| good	24.038 \| good	0.439 \| good
2025-12-06T02:00:00.000Z	32 \| good	4.391 \| good	28.236 \| good	19.493 \| good	0.345 \| good	33.561 \| good	0.576 \| good
2025-12-06T03:00:00.000Z	37 \| good	6.154 \| good	26.483 \| good	14.956 \| good	0.613 \| good	38.562 \| good	0.77 \| good
2025-12-06T04:00:00.000Z	52 \| moderate	9.662 \| good	36.138 \| good	11.519 \| good	0.958 \| good	39.018 \| good	0.83 \| good
2025-12-06T05:00:00.000Z	56 \| moderate	11.783 \| good	35.816 \| good	6.895 \| good	0.807 \| good	38.071 \| good	0.958 \| good
2025-12-06T06:00:00.000Z	58 \| moderate	13.344 \| fine	40.306 \| good	4.205 \| good	1.006 \| good	34.742 \| good	0.966 \| good
2025-12-06T07:00:00.000Z	58 \| moderate	13.171 \| fine	34.72 \| good	4.117 \| good	1.005 \| good	34.742 \| good	0.964 \| good
2025-12-06T08:00:00.000Z	60 \| moderate	14.143 \| fine	37.318 \| good	1.995 \| good	0.716 \| good	32.814 \| good	0.912 \| good
2025-12-06T09:00:00.000Z	62 \| moderate	14.568 \| fine	38.053 \| good	3.1 \| good	0.626 \| good	30.594 \| good	0.847 \| good
2025-12-06T10:00:00.000Z	58 \| moderate	13.426 \| fine	36.806 \| good	3.09 \| good	0.752 \| good	29.454 \| good	0.725 \| good
2025-12-06T11:00:00.000Z	58 \| moderate	13.308 \| fine	39.757 \| good	1.216 \| good	0.922 \| good	29.298 \| good	0.643 \| good
2025-12-06T12:00:00.000Z	64 \| moderate	15.972 \| fine	46.729 \| good	1.867 \| good	0.738 \| good	29.168 \| good	0.652 \| good
2025-12-06T13:00:00.000Z	58 \| moderate	13.464 \| fine	49.059 \| good	2.157 \| good	0.741 \| good	29.168 \| good	0.653 \| good
2025-12-06T14:00:00.000Z	60 \| moderate	13.949 \| fine	47.167 \| good	3.5 \| good	0.817 \| good	28.624 \| good	0.684 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	15.392 \| fine	50.211 \| good	3.823 \| good	0.939 \| good	29.307 \| good	0.873 \| good
2025-12-06T16:00:00.000Z	60 \| moderate	14.407 \| fine	47.161 \| good	4.89 \| good	1.024 \| good	28.88 \| good	0.867 \| good
2025-12-06T17:00:00.000Z	60 \| moderate	13.54 \| fine	47.631 \| good	10.476 \| good	0.852 \| good	27.488 \| good	0.701 \| good
2025-12-06T18:00:00.000Z	54 \| moderate	10.785 \| good	40.843 \| good	17.889 \| good	0.705 \| good	22.523 \| good	0.486 \| good
2025-12-06T19:00:00.000Z	49 \| good	9.327 \| good	36.914 \| good	21.547 \| good	1.273 \| good	20.49 \| good	0.467 \| good
2025-12-06T20:00:00.000Z	49 \| good	9.324 \| good	43.973 \| good	26.296 \| good	0.994 \| good	17.654 \| good	0.46 \| good
2025-12-06T21:00:00.000Z	44 \| good	7.882 \| good	31.326 \| good	31.638 \| good	1.078 \| good	17.602 \| good	0.406 \| good
2025-12-06T22:00:00.000Z	31 \| good	5.296 \| good	22.7 \| good	33.187 \| good	0.372 \| good	13.033 \| good	0.322 \| good
2025-12-06T23:00:00.000Z	32 \| good	3.251 \| good	18.513 \| good	35.31 \| good	0.747 \| good	11.244 \| good	0.325 \| good
2025-12-07T00:00:00.000Z	33 \| good	4.39 \| good	18.965 \| good	35.543 \| good	0.797 \| good	12.625 \| good	0.325 \| good
2025-12-07T01:00:00.000Z	32 \| good	4.957 \| good	24.408 \| good	34.974 \| good	0.866 \| good	14.187 \| good	0.323 \| good
2025-12-07T02:00:00.000Z	33 \| good	5.805 \| good	24.534 \| good	31.889 \| good	0.826 \| good	18.107 \| good	0.409 \| good
2025-12-07T03:00:00.000Z	38 \| good	7.165 \| good	34.253 \| good	26.548 \| good	0.795 \| good	19.845 \| good	0.505 \| good
2025-12-07T04:00:00.000Z	49 \| good	8.63 \| good	34.85 \| good	24.368 \| good	0.961 \| good	22.155 \| good	0.552 \| good
2025-12-07T05:00:00.000Z	64 \| moderate	16.482 \| fine	42.171 \| good	22.358 \| good	0.647 \| good	28.007 \| good	0.769 \| good
2025-12-07T06:00:00.000Z	62 \| moderate	14.801 \| fine	35.889 \| good	15.993 \| good	0.891 \| good	30.615 \| good	1.041 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.448 \| fine	64.821 \| fine	15.012 \| good	0.891 \| good	30.615 \| good	1.042 \| good
2025-12-07T08:00:00.000Z	64 \| moderate	16.362 \| fine	48.245 \| good	11.904 \| good	0.992 \| good	27.268 \| good	0.902 \| good
2025-12-07T09:00:00.000Z	62 \| moderate	15.168 \| fine	39.553 \| good	6.861 \| good	0.589 \| good	25.868 \| good	0.805 \| good
2025-12-07T10:00:00.000Z	67 \| moderate	17.655 \| fine	44.814 \| good	4.468 \| good	0.936 \| good	24.712 \| good	0.707 \| good
2025-12-07T11:00:00.000Z	69 \| moderate	18.811 \| fine	40.756 \| good	3.438 \| good	0.931 \| good	24.712 \| good	0.709 \| good
2025-12-07T12:00:00.000Z	69 \| moderate	19.136 \| fine	43.718 \| good	2.996 \| good	0.927 \| good	24.712 \| good	0.712 \| good
2025-12-07T13:00:00.000Z	73 \| moderate	20.902 \| fine	61.904 \| fine	2.346 \| good	0.821 \| good	5.688 \| good	0.57 \| good
2025-12-07T14:00:00.000Z	67 \| moderate	18.194 \| fine	51.154 \| good	2.316 \| good	0.564 \| good	24.135 \| good	0.642 \| good
2025-12-07T15:00:00.000Z	64 \| moderate	16.418 \| fine	50.046 \| good	2.498 \| good	0.679 \| good	24.561 \| good	0.722 \| good
2025-12-07T16:00:00.000Z	66 \| moderate	17.189 \| fine	60.636 \| fine	2.94 \| good	0.692 \| good	23.941 \| good	0.757 \| good
2025-12-07T17:00:00.000Z	69 \| moderate	18.567 \| fine	56.702 \| fine	11.507 \| good	0.605 \| good	23.212 \| good	0.649 \| good
2025-12-07T18:00:00.000Z	69 \| moderate	18.759 \| fine	45.762 \| good	18.154 \| good	0.517 \| good	20.929 \| good	0.523 \| good
2025-12-07T19:00:00.000Z	64 \| moderate	15.689 \| fine	48.762 \| good	19.62 \| good	0.776 \| good	21.509 \| good	0.485 \| good
2025-12-07T20:00:00.000Z	62 \| moderate	15.478 \| fine	48.243 \| good	28.579 \| good	1.093 \| good	22.114 \| good	0.528 \| good
2025-12-07T21:00:00.000Z	66 \| moderate	16.959 \| fine	43.914 \| good	32.65 \| good	0.75 \| good	20.144 \| good	0.474 \| good
2025-12-07T22:00:00.000Z	69 \| moderate	18.626 \| fine	54.98 \| good	36.482 \| good	0.856 \| good	20.869 \| good	0.476 \| good
2025-12-07T23:00:00.000Z	66 \| moderate	16.955 \| fine	37.802 \| good	38.542 \| good	1.139 \| good	26.385 \| good	0.573 \| good
2025-12-07T23:00:00.000Z	69 \| moderate	18.626 \| fine	54.98 \| good	36.482 \| good	0.856 \| good	20.869 \| good	0.476 \| good
2025-12-08T00:00:00.000Z	52 \| moderate	10.429 \| good	46.48 \| good	35.416 \| good	4.817 \| good	39.145 \| good	0.355 \| good
2025-12-08T01:00:00.000Z	52 \| moderate	10.42 \| good	46.598 \| good	27.727 \| good	4.695 \| good	41.495 \| good	0.41 \| good
2025-12-08T02:00:00.000Z	56 \| moderate	12.151 \| fine	54.411 \| good	22.944 \| good	4.573 \| good	43.846 \| good	0.465 \| good
2025-12-08T03:00:00.000Z	69 \| moderate	19.417 \| fine	85.464 \| fine	13.489 \| good	4.45 \| good	46.196 \| good	0.521 \| good
2025-12-08T04:00:00.000Z	90 \| moderate	29.686 \| fine	128.727 \| fine	8.492 \| good	4.209 \| good	43.795 \| good	0.511 \| good
2025-12-08T05:00:00.000Z	102 \| sensitive	35.614 \| moderate	155.4 \| moderate	6.077 \| good	3.968 \| good	41.394 \| good	0.501 \| good
2025-12-08T06:00:00.000Z	103 \| sensitive	36.466 \| moderate	159.185 \| moderate	5.628 \| good	3.726 \| good	38.993 \| good	0.492 \| good
2025-12-08T07:00:00.000Z	105 \| sensitive	36.541 \| moderate	159.763 \| moderate	5.106 \| good	3.323 \| good	37.575 \| good	0.453 \| good
2025-12-08T08:00:00.000Z	118 \| sensitive	42.44 \| moderate	189.073 \| moderate	4.963 \| good	2.92 \| good	36.156 \| good	0.415 \| good
2025-12-08T09:00:00.000Z	122 \| sensitive	44.364 \| moderate	198.432 \| moderate	3.467 \| good	2.517 \| good	34.738 \| good	0.377 \| good
2025-12-08T10:00:00.000Z	132 \| sensitive	47.678 \| moderate	214.273 \| moderate	5.133 \| good	2.402 \| good	34.192 \| good	0.348 \| good
2025-12-08T11:00:00.000Z	144 \| sensitive	53.313 \| moderate	239.783 \| moderate	2.577 \| good	2.287 \| good	33.646 \| good	0.319 \| good
2025-12-08T12:00:00.000Z	151 \| unhealthy	56.048 \| poor	249.032 \| moderate	1.948 \| good	2.172 \| good	33.1 \| good	0.291 \| good
2025-12-08T13:00:00.000Z	158 \| unhealthy	64.843 \| poor	264.279 \| poor	1.293 \| good	2.337 \| good	32.581 \| good	0.287 \| good
2025-12-08T14:00:00.000Z	156 \| unhealthy	62.485 \| poor	261.198 \| poor	0.697 \| good	2.502 \| good	32.062 \| good	0.284 \| good
2025-12-08T15:00:00.000Z	155 \| unhealthy	60.907 \| poor	257.305 \| poor	1.131 \| good	2.667 \| good	31.543 \| good	0.281 \| good
2025-12-08T16:00:00.000Z	144 \| sensitive	53.358 \| moderate	236.445 \| moderate	2.347 \| good	2.874 \| good	28.736 \| good	0.288 \| good
2025-12-08T17:00:00.000Z	127 \| sensitive	45.529 \| moderate	201.595 \| moderate	9.671 \| good	3.081 \| good	25.929 \| good	0.295 \| good
2025-12-08T18:00:00.000Z	79 \| moderate	24.041 \| fine	105.46 \| fine	20.746 \| good	3.287 \| good	23.122 \| good	0.301 \| good
2025-12-08T19:00:00.000Z	60 \| moderate	14.482 \| fine	64.042 \| fine	27.391 \| good	3.484 \| good	23.045 \| good	0.29 \| good
2025-12-08T20:00:00.000Z	56 \| moderate	11.896 \| good	53.169 \| good	32.653 \| good	3.68 \| good	22.967 \| good	0.278 \| good
2025-12-08T21:00:00.000Z	54 \| moderate	11.292 \| good	50.187 \| good	34.223 \| good	3.876 \| good	22.89 \| good	0.266 \| good
2025-12-08T22:00:00.000Z	56 \| moderate	11.868 \| good	53.212 \| good	34.039 \| good	4.079 \| good	27.256 \| good	0.282 \| good
2025-12-08T23:00:00.000Z	52 \| moderate	10.461 \| good	46.564 \| good	31.163 \| good	4.281 \| good	31.622 \| good	0.297 \| good
2025-12-09T00:00:00.000Z	54 \| moderate	10.692 \| good	47.392 \| good	24.87 \| good	4.484 \| good	35.988 \| good	0.312 \| good
2025-12-09T01:00:00.000Z	54 \| moderate	11.329 \| good	50.702 \| good	18.361 \| good	4.483 \| good	37.582 \| good	0.341 \| good
2025-12-09T02:00:00.000Z	58 \| moderate	13.484 \| fine	60.428 \| fine	14.118 \| good	4.482 \| good	39.176 \| good	0.369 \| good
2025-12-09T03:00:00.000Z	69 \| moderate	18.908 \| fine	83.157 \| fine	3.492 \| good	4.48 \| good	40.77 \| good	0.398 \| good
2025-12-09T04:00:00.000Z	75 \| moderate	22.442 \| fine	98.363 \| fine	2.056 \| good	4.282 \| good	40.053 \| good	0.392 \| good
2025-12-09T05:00:00.000Z	71 \| moderate	20.122 \| fine	88.555 \| fine	3.408 \| good	4.083 \| good	39.336 \| good	0.385 \| good
2025-12-09T06:00:00.000Z	60 \| moderate	13.566 \| fine	60.543 \| fine	6.312 \| good	3.885 \| good	38.619 \| good	0.379 \| good
2025-12-09T07:00:00.000Z	52 \| moderate	9.517 \| good	42.085 \| good	4.653 \| good	3.216 \| good	36.408 \| good	0.344 \| good
2025-12-09T08:00:00.000Z	52 \| moderate	9.843 \| good	43.694 \| good	5.682 \| good	2.547 \| good	34.197 \| good	0.31 \| good
2025-12-09T09:00:00.000Z	54 \| moderate	11.285 \| good	49.804 \| good	3.047 \| good	1.878 \| good	31.986 \| good	0.275 \| good
2025-12-09T10:00:00.000Z	54 \| moderate	11.096 \| good	49.006 \| good	2.655 \| good	1.707 \| good	28.463 \| good	0.243 \| good
2025-12-09T11:00:00.000Z	56 \| moderate	11.989 \| good	54.09 \| good	2.335 \| good	1.537 \| good	24.941 \| good	0.211 \| good
2025-12-09T12:00:00.000Z	58 \| moderate	12.633 \| fine	56.585 \| fine	2.074 \| good	1.366 \| good	21.418 \| good	0.179 \| good
2025-12-09T13:00:00.000Z	33 \| good	6.275 \| good	27.757 \| good	1.33 \| good	1.473 \| good	21.798 \| good	0.182 \| good
2025-12-09T14:00:00.000Z	44 \| good	7.873 \| good	34.374 \| good	1.046 \| good	1.58 \| good	22.178 \| good	0.186 \| good
2025-12-09T15:00:00.000Z	38 \| good	6.548 \| good	28.909 \| good	1.463 \| good	1.686 \| good	22.558 \| good	0.189 \| good
2025-12-09T16:00:00.000Z	44 \| good	8.084 \| good	35.525 \| good	2.956 \| good	2.063 \| good	21.669 \| good	0.206 \| good
2025-12-09T17:00:00.000Z	38 \| good	7.252 \| good	32.044 \| good	5.689 \| good	2.44 \| good	20.779 \| good	0.222 \| good
2025-12-09T18:00:00.000Z	27 \| good	5.106 \| good	22.358 \| good	14.246 \| good	2.817 \| good	19.89 \| good	0.239 \| good
2025-12-09T19:00:00.000Z	27 \| good	4.685 \| good	20.29 \| good	20.311 \| good	3.206 \| good	20.063 \| good	0.23 \| good
2025-12-09T20:00:00.000Z	22 \| good	4.461 \| good	19.27 \| good	24.226 \| good	3.596 \| good	20.236 \| good	0.22 \| good
2025-12-09T21:00:00.000Z	23 \| good	4.255 \| good	18.364 \| good	25.283 \| good	3.985 \| good	20.409 \| good	0.211 \| good
2025-12-09T22:00:00.000Z	24 \| good	3.795 \| good	16.577 \| good	24.639 \| good	4.129 \| good	24.94 \| good	0.232 \| good
2025-12-09T23:00:00.000Z	27 \| good	3.152 \| good	13.816 \| good	20.231 \| good	4.272 \| good	29.471 \| good	0.254 \| good

Westminster, California live air quality index now

Major air pollutants in Westminster, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Westminster, California air quality map: Track AQI near you

Air quality in nearby cities

Stanton, California

Garden Grove, California

Fountain Valley, California

Cypress, California

Los Alamitos, California

Rossmoor, California

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Frequently asked questions

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

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

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

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

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

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

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

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

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

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