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

The current PM10 concentration at Westminster, California is 23.36 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Westminster, California is 0.357 ppb.

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

The current ozone (O3) concentration at Westminster, California is 24.21 ppm.

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

The current nitrogen dioxide (NO2) concentration at Westminster, California is 14.085 ppb.

Live air quality index in Westminster, California today

Name: Live air pollution levels in Westminster, California today
Creator: Ambee

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)

13.31 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

37.11 μg/m³

155

255

425

605+

Ozone (O₃)

31.34 ppb

201

201+

Sulfur Dioxide (SO₂)

0.62 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

8.04 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.29 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
2025-07-09T19:00:00.000Z	62 \| moderate	14.611 \| fine	31.586 \| good	35.995 \| good	0.635 \| good	13.027 \| good	0.275 \| good
2025-07-09T20:00:00.000Z	56 \| moderate	12.05 \| good	27.378 \| good	39.169 \| good	0.61 \| good	9.807 \| good	0.227 \| good
2025-07-09T21:00:00.000Z	56 \| moderate	12.442 \| fine	25.765 \| good	44.428 \| good	0.605 \| good	11.87 \| good	0.217 \| good
2025-07-09T22:00:00.000Z	56 \| moderate	12.272 \| fine	29.735 \| good	52.083 \| good	0.865 \| good	11.43 \| good	0.268 \| good
2025-07-09T23:00:00.000Z	56 \| moderate	12.475 \| fine	31.448 \| good	52.868 \| good	0.725 \| good	12.617 \| good	0.288 \| good
2025-07-10T00:00:00.000Z	54 \| moderate	10.707 \| good	32.307 \| good	53.133 \| good	0.659 \| good	12.919 \| good	0.288 \| good
2025-07-10T01:00:00.000Z	52 \| moderate	9.868 \| good	29.156 \| good	48.736 \| good	0.731 \| good	13.148 \| good	0.288 \| good
2025-07-10T02:00:00.000Z	44 \| good	8.4 \| good	26.321 \| good	44.178 \| good	0.683 \| good	13.413 \| good	0.288 \| good
2025-07-10T03:00:00.000Z	33 \| good	5.913 \| good	23.692 \| good	36.174 \| good	0.577 \| good	13.193 \| good	0.288 \| good
2025-07-10T04:00:00.000Z	29 \| good	4.556 \| good	19.278 \| good	31.318 \| good	0.491 \| good	13.675 \| good	0.288 \| good
2025-07-10T05:00:00.000Z	33 \| good	5.684 \| good	23.181 \| good	25.127 \| good	0.431 \| good	14.016 \| good	0.323 \| good
2025-07-10T06:00:00.000Z	38 \| good	6.783 \| good	23.36 \| good	24.21 \| good	0.357 \| good	14.085 \| good	0.326 \| good
2025-07-10T07:00:00.000Z	44 \| good	7.798 \| good	27.413 \| good	21.273 \| good	0.432 \| good	13.64 \| good	0.326 \| good
2025-07-10T08:00:00.000Z	44 \| good	8.136 \| good	23.94 \| good	18.412 \| good	0.33 \| good	16.146 \| good	0.326 \| good
2025-07-10T09:00:00.000Z	44 \| good	8.216 \| good	21.969 \| good	17.868 \| good	0.344 \| good	13.577 \| good	0.298 \| good
2025-07-10T10:00:00.000Z	49 \| good	9.034 \| good	23.801 \| good	16.104 \| good	0.421 \| good	11.837 \| good	0.257 \| good
2025-07-10T11:00:00.000Z	49 \| good	9.213 \| good	26.521 \| good	14.324 \| good	0.452 \| good	13.378 \| good	0.217 \| good
2025-07-10T12:00:00.000Z	49 \| good	9.411 \| good	25.068 \| good	12.726 \| good	0.333 \| good	12.803 \| good	0.264 \| good
2025-07-10T13:00:00.000Z	49 \| good	9.198 \| good	25.129 \| good	12.787 \| good	0.278 \| good	16.622 \| good	0.327 \| good
2025-07-10T14:00:00.000Z	49 \| good	9.197 \| good	20.719 \| good	11.847 \| good	0.41 \| good	17.384 \| good	0.414 \| good
2025-07-10T15:00:00.000Z	58 \| moderate	12.652 \| fine	32.689 \| good	14.098 \| good	0.781 \| good	17.607 \| good	0.422 \| good
2025-07-10T16:00:00.000Z	58 \| moderate	13.426 \| fine	29.183 \| good	19.06 \| good	0.905 \| good	16.269 \| good	0.436 \| good
2025-07-10T17:00:00.000Z	64 \| moderate	15.869 \| fine	35.438 \| good	24.111 \| good	0.897 \| good	15.567 \| good	0.405 \| good
2025-07-10T18:00:00.000Z	62 \| moderate	15.189 \| fine	42.282 \| good	33.575 \| good	0.882 \| good	14.713 \| good	0.324 \| good
2025-07-10T19:00:00.000Z	62 \| moderate	14.702 \| fine	36.763 \| good	40.571 \| good	0.999 \| good	11.481 \| good	0.278 \| good
2025-07-10T20:00:00.000Z	58 \| moderate	13.182 \| fine	41.53 \| good	50.295 \| good	0.861 \| good	10.426 \| good	0.257 \| good
2025-07-10T21:00:00.000Z	56 \| moderate	12.032 \| good	37.08 \| good	50.002 \| good	0.621 \| good	6.827 \| good	0.214 \| good
2025-07-10T22:00:00.000Z	56 \| moderate	12.08 \| good	35.683 \| good	51.202 \| good	0.526 \| good	7.678 \| good	0.214 \| good
2025-07-10T23:00:00.000Z	54 \| moderate	11.015 \| good	29.015 \| good	50.563 \| good	0.498 \| good	8.331 \| good	0.214 \| good
2025-07-11T00:00:00.000Z	54 \| moderate	10.508 \| good	24.874 \| good	48.868 \| good	0.454 \| good	9.275 \| good	0.214 \| good
2025-07-11T01:00:00.000Z	54 \| moderate	11.051 \| good	30.607 \| good	46.785 \| good	0.656 \| good	9.09 \| good	0.214 \| good
2025-07-11T02:00:00.000Z	52 \| moderate	9.501 \| good	22.396 \| good	43.775 \| good	0.722 \| good	9.499 \| good	0.283 \| good
2025-07-11T03:00:00.000Z	49 \| good	8.917 \| good	29.03 \| good	39.163 \| good	0.657 \| good	10.79 \| good	0.252 \| good
2025-07-11T04:00:00.000Z	49 \| good	9.348 \| good	32.91 \| good	33.082 \| good	0.534 \| good	11.439 \| good	0.252 \| good
2025-07-11T05:00:00.000Z	49 \| good	8.897 \| good	29.437 \| good	29.013 \| good	0.54 \| good	14.115 \| good	0.252 \| good
2025-07-11T06:00:00.000Z	52 \| moderate	9.509 \| good	30.306 \| good	28.6 \| good	0.451 \| good	13.01 \| good	0.288 \| good
2025-07-11T07:00:00.000Z	49 \| good	9.095 \| good	26.912 \| good	23.41 \| good	0.489 \| good	12.009 \| good	0.25 \| good
2025-07-11T08:00:00.000Z	52 \| moderate	9.818 \| good	26.148 \| good	22.533 \| good	0.393 \| good	10.22 \| good	0.25 \| good
2025-07-11T09:00:00.000Z	49 \| good	9.016 \| good	21.027 \| good	19.921 \| good	0.362 \| good	6.71 \| good	0.141 \| good
2025-07-11T10:00:00.000Z	49 \| good	8.847 \| good	18.669 \| good	23.418 \| good	0.342 \| good	3.67 \| good	0.148 \| good
2025-07-11T11:00:00.000Z	52 \| moderate	9.518 \| good	24.397 \| good	25.276 \| good	0.557 \| good	3.69 \| good	0.153 \| good
2025-07-11T12:00:00.000Z	52 \| moderate	9.597 \| good	18.719 \| good	21.997 \| good	0.411 \| good	4.176 \| good	0.15 \| good
2025-07-11T13:00:00.000Z	49 \| good	9.235 \| good	25.723 \| good	25.042 \| good	0.291 \| good	6.816 \| good	0.263 \| good
2025-07-11T14:00:00.000Z	54 \| moderate	10.794 \| good	27.252 \| good	26.17 \| good	0.329 \| good	8.008 \| good	0.264 \| good
2025-07-11T15:00:00.000Z	56 \| moderate	12.053 \| good	28.153 \| good	28.903 \| good	0.221 \| good	9.173 \| good	0.248 \| good
2025-07-11T16:00:00.000Z	56 \| moderate	12.471 \| fine	31.16 \| good	28.167 \| good	0.387 \| good	8.514 \| good	0.248 \| good
2025-07-11T17:00:00.000Z	58 \| moderate	13.307 \| fine	37.114 \| good	31.336 \| good	0.619 \| good	8.043 \| good	0.29 \| good
2025-07-11T18:00:00.000Z	58 \| moderate	13.307 \| fine	37.114 \| good	31.336 \| good	0.619 \| good	8.043 \| good	0.29 \| good
2025-07-10T07:00:00.000Z	44 \| good	8.121 \| good	35.683 \| good	15.438 \| good	2.855 \| good	16.21 \| good	0.164 \| good
2025-07-10T08:00:00.000Z	44 \| good	8.347 \| good	36.542 \| good	17.854 \| good	2.693 \| good	16.314 \| good	0.168 \| good
2025-07-10T09:00:00.000Z	49 \| good	8.937 \| good	39.416 \| good	18.978 \| good	2.531 \| good	16.418 \| good	0.172 \| good
2025-07-10T10:00:00.000Z	49 \| good	8.804 \| good	39.023 \| good	19.208 \| good	2.41 \| good	15.663 \| good	0.167 \| good
2025-07-10T11:00:00.000Z	52 \| moderate	9.767 \| good	43.539 \| good	17.867 \| good	2.29 \| good	14.907 \| good	0.162 \| good
2025-07-10T12:00:00.000Z	49 \| good	8.775 \| good	38.811 \| good	16.588 \| good	2.169 \| good	14.151 \| good	0.158 \| good
2025-07-10T13:00:00.000Z	49 \| good	9.075 \| good	40.02 \| good	17.15 \| good	2.3 \| good	12.94 \| good	0.16 \| good
2025-07-10T14:00:00.000Z	56 \| moderate	12.443 \| fine	55.07 \| fine	18.098 \| good	2.431 \| good	11.729 \| good	0.163 \| good
2025-07-10T15:00:00.000Z	62 \| moderate	14.577 \| fine	65.562 \| fine	19.481 \| good	2.562 \| good	10.518 \| good	0.166 \| good
2025-07-10T16:00:00.000Z	66 \| moderate	17.396 \| fine	76.966 \| fine	28.18 \| good	2.834 \| good	10.038 \| good	0.164 \| good
2025-07-10T17:00:00.000Z	67 \| moderate	18.167 \| fine	80.487 \| fine	41.826 \| good	3.107 \| good	9.558 \| good	0.161 \| good
2025-07-10T18:00:00.000Z	66 \| moderate	16.668 \| fine	73.82 \| fine	56.822 \| fine	3.379 \| good	9.078 \| good	0.159 \| good
2025-07-10T19:00:00.000Z	80 \| moderate	18.123 \| fine	80.193 \| fine	63.976 \| fine	3.389 \| good	8.093 \| good	0.155 \| good
2025-07-10T20:00:00.000Z	74 \| moderate	17.396 \| fine	76.807 \| fine	61.616 \| fine	3.399 \| good	7.108 \| good	0.151 \| good
2025-07-10T21:00:00.000Z	71 \| moderate	20.076 \| fine	88.51 \| fine	61.039 \| fine	3.409 \| good	6.123 \| good	0.146 \| good
2025-07-10T22:00:00.000Z	69 \| moderate	18.611 \| fine	82.242 \| fine	58.937 \| fine	3.456 \| good	6.015 \| good	0.146 \| good
2025-07-10T23:00:00.000Z	67 \| moderate	17.863 \| fine	79.231 \| fine	57.601 \| fine	3.504 \| good	5.907 \| good	0.146 \| good
2025-07-11T00:00:00.000Z	60 \| moderate	14.18 \| fine	63.492 \| fine	50.878 \| good	3.551 \| good	5.8 \| good	0.146 \| good
2025-07-11T01:00:00.000Z	56 \| moderate	11.927 \| good	53.051 \| good	47.78 \| good	3.594 \| good	7.606 \| good	0.152 \| good
2025-07-11T02:00:00.000Z	58 \| moderate	12.733 \| fine	57.531 \| fine	42.422 \| good	3.638 \| good	9.412 \| good	0.157 \| good
2025-07-11T03:00:00.000Z	54 \| moderate	10.801 \| good	48.054 \| good	37.751 \| good	3.682 \| good	11.218 \| good	0.162 \| good
2025-07-11T04:00:00.000Z	56 \| moderate	11.542 \| good	51.344 \| good	34.203 \| good	3.494 \| good	12.322 \| good	0.163 \| good
2025-07-11T05:00:00.000Z	56 \| moderate	12.472 \| fine	55.833 \| fine	30.014 \| good	3.307 \| good	13.425 \| good	0.163 \| good
2025-07-11T06:00:00.000Z	56 \| moderate	11.937 \| good	53.196 \| good	25.388 \| good	3.12 \| good	14.529 \| good	0.163 \| good
2025-07-11T07:00:00.000Z	52 \| moderate	10.3 \| good	46.007 \| good	22.038 \| good	2.973 \| good	14.425 \| good	0.162 \| good
2025-07-11T08:00:00.000Z	52 \| moderate	10.258 \| good	45.595 \| good	22.224 \| good	2.827 \| good	14.321 \| good	0.162 \| good
2025-07-11T09:00:00.000Z	52 \| moderate	10.446 \| good	46.197 \| good	23.771 \| good	2.681 \| good	14.216 \| good	0.162 \| good
2025-07-11T10:00:00.000Z	52 \| moderate	9.693 \| good	43.205 \| good	25.554 \| good	2.605 \| good	13.49 \| good	0.157 \| good
2025-07-11T11:00:00.000Z	54 \| moderate	10.828 \| good	47.998 \| good	25.772 \| good	2.53 \| good	12.764 \| good	0.151 \| good
2025-07-11T12:00:00.000Z	49 \| good	9.138 \| good	40.317 \| good	24.238 \| good	2.454 \| good	12.038 \| good	0.146 \| good
2025-07-11T13:00:00.000Z	44 \| good	8.098 \| good	35.658 \| good	24.279 \| good	2.539 \| good	10.498 \| good	0.145 \| good
2025-07-11T14:00:00.000Z	54 \| moderate	10.604 \| good	46.863 \| good	26.343 \| good	2.624 \| good	8.958 \| good	0.144 \| good
2025-07-11T15:00:00.000Z	58 \| moderate	13.439 \| fine	60.083 \| fine	28.679 \| good	2.709 \| good	7.418 \| good	0.143 \| good
2025-07-11T16:00:00.000Z	62 \| moderate	14.636 \| fine	66.144 \| fine	34.095 \| good	2.59 \| good	6.475 \| good	0.139 \| good
2025-07-11T17:00:00.000Z	66 \| moderate	16.907 \| fine	75.463 \| fine	39.253 \| good	2.47 \| good	5.531 \| good	0.135 \| good
2025-07-11T18:00:00.000Z	62 \| moderate	15.42 \| fine	68.93 \| fine	46.053 \| good	2.351 \| good	4.588 \| good	0.132 \| good
2025-07-11T19:00:00.000Z	60 \| moderate	13.884 \| fine	62.626 \| fine	46.832 \| good	2.181 \| good	3.919 \| good	0.128 \| good
2025-07-11T20:00:00.000Z	58 \| moderate	12.93 \| fine	57.975 \| fine	42.478 \| good	2.012 \| good	3.251 \| good	0.124 \| good
2025-07-11T21:00:00.000Z	62 \| moderate	15.257 \| fine	68.012 \| fine	41.527 \| good	1.842 \| good	2.582 \| good	0.121 \| good
2025-07-11T22:00:00.000Z	58 \| moderate	13.443 \| fine	60.558 \| fine	43.146 \| good	1.792 \| good	2.676 \| good	0.119 \| good
2025-07-11T23:00:00.000Z	56 \| moderate	12.416 \| fine	55.932 \| fine	44.248 \| good	1.742 \| good	2.771 \| good	0.117 \| good
2025-07-12T00:00:00.000Z	49 \| good	8.9 \| good	39.332 \| good	38.086 \| good	1.692 \| good	2.865 \| good	0.115 \| good
2025-07-12T01:00:00.000Z	44 \| good	8.204 \| good	35.834 \| good	35.929 \| good	1.749 \| good	4.304 \| good	0.118 \| good
2025-07-12T02:00:00.000Z	44 \| good	8.016 \| good	35.083 \| good	28.436 \| good	1.806 \| good	5.742 \| good	0.12 \| good
2025-07-12T03:00:00.000Z	49 \| good	8.804 \| good	39.039 \| good	30.855 \| good	1.863 \| good	7.181 \| good	0.122 \| good
2025-07-12T04:00:00.000Z	52 \| moderate	10.246 \| good	45.579 \| good	28.04 \| good	2.022 \| good	8.687 \| good	0.125 \| good
2025-07-12T05:00:00.000Z	52 \| moderate	9.533 \| good	42.381 \| good	27.694 \| good	2.181 \| good	10.194 \| good	0.128 \| good
2025-07-12T06:00:00.000Z	60 \| moderate	14.01 \| fine	17.825 \| good	25.713 \| good	2.339 \| good	11.682 \| good	0.131 \| good

Westminster

Get reliable air quality data to drive your business

Westminster, California air quality map: Track AQI near you

0.21ppm

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 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 07:00:00 on 2025-07-09.

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 04:00:00 on 2025-07-10.

What is the current air quality in Westminster, California?

The current air quality in Westminster, California is 38, categorized as Good 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 6.783 μg/m³.

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

The current PM₁₀ concentration at Westminster, California is 23.36 μg/m³.

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

The current carbon monoxide (CO) concentration at Westminster, California is 0.326 ppm.

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

The current sulfur dioxide (SO₂) concentration at Westminster, California is 0.357 ppb.

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

The current ozone (O₃) concentration at Westminster, California is 24.21 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Westminster, California is 14.085 ppb.

Certified

APIs

Refund Policy

Historical Climate Data

Terms & Conditions

Refund Policy

Terms & Conditions

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-09T19:00:00.000Z	62 \| moderate	14.611 \| fine	31.586 \| good	35.995 \| good	0.635 \| good	13.027 \| good	0.275 \| good
2025-07-09T20:00:00.000Z	56 \| moderate	12.05 \| good	27.378 \| good	39.169 \| good	0.61 \| good	9.807 \| good	0.227 \| good
2025-07-09T21:00:00.000Z	56 \| moderate	12.442 \| fine	25.765 \| good	44.428 \| good	0.605 \| good	11.87 \| good	0.217 \| good
2025-07-09T22:00:00.000Z	56 \| moderate	12.272 \| fine	29.735 \| good	52.083 \| good	0.865 \| good	11.43 \| good	0.268 \| good
2025-07-09T23:00:00.000Z	56 \| moderate	12.475 \| fine	31.448 \| good	52.868 \| good	0.725 \| good	12.617 \| good	0.288 \| good
2025-07-10T00:00:00.000Z	54 \| moderate	10.707 \| good	32.307 \| good	53.133 \| good	0.659 \| good	12.919 \| good	0.288 \| good
2025-07-10T01:00:00.000Z	52 \| moderate	9.868 \| good	29.156 \| good	48.736 \| good	0.731 \| good	13.148 \| good	0.288 \| good
2025-07-10T02:00:00.000Z	44 \| good	8.4 \| good	26.321 \| good	44.178 \| good	0.683 \| good	13.413 \| good	0.288 \| good
2025-07-10T03:00:00.000Z	33 \| good	5.913 \| good	23.692 \| good	36.174 \| good	0.577 \| good	13.193 \| good	0.288 \| good
2025-07-10T04:00:00.000Z	29 \| good	4.556 \| good	19.278 \| good	31.318 \| good	0.491 \| good	13.675 \| good	0.288 \| good
2025-07-10T05:00:00.000Z	33 \| good	5.684 \| good	23.181 \| good	25.127 \| good	0.431 \| good	14.016 \| good	0.323 \| good
2025-07-10T06:00:00.000Z	38 \| good	6.783 \| good	23.36 \| good	24.21 \| good	0.357 \| good	14.085 \| good	0.326 \| good
2025-07-10T07:00:00.000Z	44 \| good	7.798 \| good	27.413 \| good	21.273 \| good	0.432 \| good	13.64 \| good	0.326 \| good
2025-07-10T08:00:00.000Z	44 \| good	8.136 \| good	23.94 \| good	18.412 \| good	0.33 \| good	16.146 \| good	0.326 \| good
2025-07-10T09:00:00.000Z	44 \| good	8.216 \| good	21.969 \| good	17.868 \| good	0.344 \| good	13.577 \| good	0.298 \| good
2025-07-10T10:00:00.000Z	49 \| good	9.034 \| good	23.801 \| good	16.104 \| good	0.421 \| good	11.837 \| good	0.257 \| good
2025-07-10T11:00:00.000Z	49 \| good	9.213 \| good	26.521 \| good	14.324 \| good	0.452 \| good	13.378 \| good	0.217 \| good
2025-07-10T12:00:00.000Z	49 \| good	9.411 \| good	25.068 \| good	12.726 \| good	0.333 \| good	12.803 \| good	0.264 \| good
2025-07-10T13:00:00.000Z	49 \| good	9.198 \| good	25.129 \| good	12.787 \| good	0.278 \| good	16.622 \| good	0.327 \| good
2025-07-10T14:00:00.000Z	49 \| good	9.197 \| good	20.719 \| good	11.847 \| good	0.41 \| good	17.384 \| good	0.414 \| good
2025-07-10T15:00:00.000Z	58 \| moderate	12.652 \| fine	32.689 \| good	14.098 \| good	0.781 \| good	17.607 \| good	0.422 \| good
2025-07-10T16:00:00.000Z	58 \| moderate	13.426 \| fine	29.183 \| good	19.06 \| good	0.905 \| good	16.269 \| good	0.436 \| good
2025-07-10T17:00:00.000Z	64 \| moderate	15.869 \| fine	35.438 \| good	24.111 \| good	0.897 \| good	15.567 \| good	0.405 \| good
2025-07-10T18:00:00.000Z	62 \| moderate	15.189 \| fine	42.282 \| good	33.575 \| good	0.882 \| good	14.713 \| good	0.324 \| good
2025-07-10T19:00:00.000Z	62 \| moderate	14.702 \| fine	36.763 \| good	40.571 \| good	0.999 \| good	11.481 \| good	0.278 \| good
2025-07-10T20:00:00.000Z	58 \| moderate	13.182 \| fine	41.53 \| good	50.295 \| good	0.861 \| good	10.426 \| good	0.257 \| good
2025-07-10T21:00:00.000Z	56 \| moderate	12.032 \| good	37.08 \| good	50.002 \| good	0.621 \| good	6.827 \| good	0.214 \| good
2025-07-10T22:00:00.000Z	56 \| moderate	12.08 \| good	35.683 \| good	51.202 \| good	0.526 \| good	7.678 \| good	0.214 \| good
2025-07-10T23:00:00.000Z	54 \| moderate	11.015 \| good	29.015 \| good	50.563 \| good	0.498 \| good	8.331 \| good	0.214 \| good
2025-07-11T00:00:00.000Z	54 \| moderate	10.508 \| good	24.874 \| good	48.868 \| good	0.454 \| good	9.275 \| good	0.214 \| good
2025-07-11T01:00:00.000Z	54 \| moderate	11.051 \| good	30.607 \| good	46.785 \| good	0.656 \| good	9.09 \| good	0.214 \| good
2025-07-11T02:00:00.000Z	52 \| moderate	9.501 \| good	22.396 \| good	43.775 \| good	0.722 \| good	9.499 \| good	0.283 \| good
2025-07-11T03:00:00.000Z	49 \| good	8.917 \| good	29.03 \| good	39.163 \| good	0.657 \| good	10.79 \| good	0.252 \| good
2025-07-11T04:00:00.000Z	49 \| good	9.348 \| good	32.91 \| good	33.082 \| good	0.534 \| good	11.439 \| good	0.252 \| good
2025-07-11T05:00:00.000Z	49 \| good	8.897 \| good	29.437 \| good	29.013 \| good	0.54 \| good	14.115 \| good	0.252 \| good
2025-07-11T06:00:00.000Z	52 \| moderate	9.509 \| good	30.306 \| good	28.6 \| good	0.451 \| good	13.01 \| good	0.288 \| good
2025-07-11T07:00:00.000Z	49 \| good	9.095 \| good	26.912 \| good	23.41 \| good	0.489 \| good	12.009 \| good	0.25 \| good
2025-07-11T08:00:00.000Z	52 \| moderate	9.818 \| good	26.148 \| good	22.533 \| good	0.393 \| good	10.22 \| good	0.25 \| good
2025-07-11T09:00:00.000Z	49 \| good	9.016 \| good	21.027 \| good	19.921 \| good	0.362 \| good	6.71 \| good	0.141 \| good
2025-07-11T10:00:00.000Z	49 \| good	8.847 \| good	18.669 \| good	23.418 \| good	0.342 \| good	3.67 \| good	0.148 \| good
2025-07-11T11:00:00.000Z	52 \| moderate	9.518 \| good	24.397 \| good	25.276 \| good	0.557 \| good	3.69 \| good	0.153 \| good
2025-07-11T12:00:00.000Z	52 \| moderate	9.597 \| good	18.719 \| good	21.997 \| good	0.411 \| good	4.176 \| good	0.15 \| good
2025-07-11T13:00:00.000Z	49 \| good	9.235 \| good	25.723 \| good	25.042 \| good	0.291 \| good	6.816 \| good	0.263 \| good
2025-07-11T14:00:00.000Z	54 \| moderate	10.794 \| good	27.252 \| good	26.17 \| good	0.329 \| good	8.008 \| good	0.264 \| good
2025-07-11T15:00:00.000Z	56 \| moderate	12.053 \| good	28.153 \| good	28.903 \| good	0.221 \| good	9.173 \| good	0.248 \| good
2025-07-11T16:00:00.000Z	56 \| moderate	12.471 \| fine	31.16 \| good	28.167 \| good	0.387 \| good	8.514 \| good	0.248 \| good
2025-07-11T17:00:00.000Z	58 \| moderate	13.307 \| fine	37.114 \| good	31.336 \| good	0.619 \| good	8.043 \| good	0.29 \| good
2025-07-11T18:00:00.000Z	58 \| moderate	13.307 \| fine	37.114 \| good	31.336 \| good	0.619 \| good	8.043 \| good	0.29 \| good
2025-07-10T07:00:00.000Z	44 \| good	8.121 \| good	35.683 \| good	15.438 \| good	2.855 \| good	16.21 \| good	0.164 \| good
2025-07-10T08:00:00.000Z	44 \| good	8.347 \| good	36.542 \| good	17.854 \| good	2.693 \| good	16.314 \| good	0.168 \| good
2025-07-10T09:00:00.000Z	49 \| good	8.937 \| good	39.416 \| good	18.978 \| good	2.531 \| good	16.418 \| good	0.172 \| good
2025-07-10T10:00:00.000Z	49 \| good	8.804 \| good	39.023 \| good	19.208 \| good	2.41 \| good	15.663 \| good	0.167 \| good
2025-07-10T11:00:00.000Z	52 \| moderate	9.767 \| good	43.539 \| good	17.867 \| good	2.29 \| good	14.907 \| good	0.162 \| good
2025-07-10T12:00:00.000Z	49 \| good	8.775 \| good	38.811 \| good	16.588 \| good	2.169 \| good	14.151 \| good	0.158 \| good
2025-07-10T13:00:00.000Z	49 \| good	9.075 \| good	40.02 \| good	17.15 \| good	2.3 \| good	12.94 \| good	0.16 \| good
2025-07-10T14:00:00.000Z	56 \| moderate	12.443 \| fine	55.07 \| fine	18.098 \| good	2.431 \| good	11.729 \| good	0.163 \| good
2025-07-10T15:00:00.000Z	62 \| moderate	14.577 \| fine	65.562 \| fine	19.481 \| good	2.562 \| good	10.518 \| good	0.166 \| good
2025-07-10T16:00:00.000Z	66 \| moderate	17.396 \| fine	76.966 \| fine	28.18 \| good	2.834 \| good	10.038 \| good	0.164 \| good
2025-07-10T17:00:00.000Z	67 \| moderate	18.167 \| fine	80.487 \| fine	41.826 \| good	3.107 \| good	9.558 \| good	0.161 \| good
2025-07-10T18:00:00.000Z	66 \| moderate	16.668 \| fine	73.82 \| fine	56.822 \| fine	3.379 \| good	9.078 \| good	0.159 \| good
2025-07-10T19:00:00.000Z	80 \| moderate	18.123 \| fine	80.193 \| fine	63.976 \| fine	3.389 \| good	8.093 \| good	0.155 \| good
2025-07-10T20:00:00.000Z	74 \| moderate	17.396 \| fine	76.807 \| fine	61.616 \| fine	3.399 \| good	7.108 \| good	0.151 \| good
2025-07-10T21:00:00.000Z	71 \| moderate	20.076 \| fine	88.51 \| fine	61.039 \| fine	3.409 \| good	6.123 \| good	0.146 \| good
2025-07-10T22:00:00.000Z	69 \| moderate	18.611 \| fine	82.242 \| fine	58.937 \| fine	3.456 \| good	6.015 \| good	0.146 \| good
2025-07-10T23:00:00.000Z	67 \| moderate	17.863 \| fine	79.231 \| fine	57.601 \| fine	3.504 \| good	5.907 \| good	0.146 \| good
2025-07-11T00:00:00.000Z	60 \| moderate	14.18 \| fine	63.492 \| fine	50.878 \| good	3.551 \| good	5.8 \| good	0.146 \| good
2025-07-11T01:00:00.000Z	56 \| moderate	11.927 \| good	53.051 \| good	47.78 \| good	3.594 \| good	7.606 \| good	0.152 \| good
2025-07-11T02:00:00.000Z	58 \| moderate	12.733 \| fine	57.531 \| fine	42.422 \| good	3.638 \| good	9.412 \| good	0.157 \| good
2025-07-11T03:00:00.000Z	54 \| moderate	10.801 \| good	48.054 \| good	37.751 \| good	3.682 \| good	11.218 \| good	0.162 \| good
2025-07-11T04:00:00.000Z	56 \| moderate	11.542 \| good	51.344 \| good	34.203 \| good	3.494 \| good	12.322 \| good	0.163 \| good
2025-07-11T05:00:00.000Z	56 \| moderate	12.472 \| fine	55.833 \| fine	30.014 \| good	3.307 \| good	13.425 \| good	0.163 \| good
2025-07-11T06:00:00.000Z	56 \| moderate	11.937 \| good	53.196 \| good	25.388 \| good	3.12 \| good	14.529 \| good	0.163 \| good
2025-07-11T07:00:00.000Z	52 \| moderate	10.3 \| good	46.007 \| good	22.038 \| good	2.973 \| good	14.425 \| good	0.162 \| good
2025-07-11T08:00:00.000Z	52 \| moderate	10.258 \| good	45.595 \| good	22.224 \| good	2.827 \| good	14.321 \| good	0.162 \| good
2025-07-11T09:00:00.000Z	52 \| moderate	10.446 \| good	46.197 \| good	23.771 \| good	2.681 \| good	14.216 \| good	0.162 \| good
2025-07-11T10:00:00.000Z	52 \| moderate	9.693 \| good	43.205 \| good	25.554 \| good	2.605 \| good	13.49 \| good	0.157 \| good
2025-07-11T11:00:00.000Z	54 \| moderate	10.828 \| good	47.998 \| good	25.772 \| good	2.53 \| good	12.764 \| good	0.151 \| good
2025-07-11T12:00:00.000Z	49 \| good	9.138 \| good	40.317 \| good	24.238 \| good	2.454 \| good	12.038 \| good	0.146 \| good
2025-07-11T13:00:00.000Z	44 \| good	8.098 \| good	35.658 \| good	24.279 \| good	2.539 \| good	10.498 \| good	0.145 \| good
2025-07-11T14:00:00.000Z	54 \| moderate	10.604 \| good	46.863 \| good	26.343 \| good	2.624 \| good	8.958 \| good	0.144 \| good
2025-07-11T15:00:00.000Z	58 \| moderate	13.439 \| fine	60.083 \| fine	28.679 \| good	2.709 \| good	7.418 \| good	0.143 \| good
2025-07-11T16:00:00.000Z	62 \| moderate	14.636 \| fine	66.144 \| fine	34.095 \| good	2.59 \| good	6.475 \| good	0.139 \| good
2025-07-11T17:00:00.000Z	66 \| moderate	16.907 \| fine	75.463 \| fine	39.253 \| good	2.47 \| good	5.531 \| good	0.135 \| good
2025-07-11T18:00:00.000Z	62 \| moderate	15.42 \| fine	68.93 \| fine	46.053 \| good	2.351 \| good	4.588 \| good	0.132 \| good
2025-07-11T19:00:00.000Z	60 \| moderate	13.884 \| fine	62.626 \| fine	46.832 \| good	2.181 \| good	3.919 \| good	0.128 \| good
2025-07-11T20:00:00.000Z	58 \| moderate	12.93 \| fine	57.975 \| fine	42.478 \| good	2.012 \| good	3.251 \| good	0.124 \| good
2025-07-11T21:00:00.000Z	62 \| moderate	15.257 \| fine	68.012 \| fine	41.527 \| good	1.842 \| good	2.582 \| good	0.121 \| good
2025-07-11T22:00:00.000Z	58 \| moderate	13.443 \| fine	60.558 \| fine	43.146 \| good	1.792 \| good	2.676 \| good	0.119 \| good
2025-07-11T23:00:00.000Z	56 \| moderate	12.416 \| fine	55.932 \| fine	44.248 \| good	1.742 \| good	2.771 \| good	0.117 \| good
2025-07-12T00:00:00.000Z	49 \| good	8.9 \| good	39.332 \| good	38.086 \| good	1.692 \| good	2.865 \| good	0.115 \| good
2025-07-12T01:00:00.000Z	44 \| good	8.204 \| good	35.834 \| good	35.929 \| good	1.749 \| good	4.304 \| good	0.118 \| good
2025-07-12T02:00:00.000Z	44 \| good	8.016 \| good	35.083 \| good	28.436 \| good	1.806 \| good	5.742 \| good	0.12 \| good
2025-07-12T03:00:00.000Z	49 \| good	8.804 \| good	39.039 \| good	30.855 \| good	1.863 \| good	7.181 \| good	0.122 \| good
2025-07-12T04:00:00.000Z	52 \| moderate	10.246 \| good	45.579 \| good	28.04 \| good	2.022 \| good	8.687 \| good	0.125 \| good
2025-07-12T05:00:00.000Z	52 \| moderate	9.533 \| good	42.381 \| good	27.694 \| good	2.181 \| good	10.194 \| good	0.128 \| good
2025-07-12T06:00:00.000Z	60 \| moderate	14.01 \| fine	17.825 \| good	25.713 \| good	2.339 \| good	11.682 \| good	0.131 \| good

Live air quality index in Westminster, California today

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)

Track live Westminster, California air quality forecast and history

Get reliable air quality data to drive your business

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

How accurate is California, USA air quality data?

Air quality levels in US

Frequently asked questions

How often is the air quality data for Westminster, California updated?

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

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

What is the current air quality in Westminster, California?

What pollutant is the most common in Westminster, California?

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

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?