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

The current PM10 concentration at Westminster, California is 10.773 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Westminster, California is 0.265 ppb.

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

The current ozone (O3) concentration at Westminster, California is 39.838 ppm.

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

The current nitrogen dioxide (NO2) concentration at Westminster, California is 5.275 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 1.951 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)

Good

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)

1.95 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

10.77 μg/m³

155

255

425

605+

Ozone (O₃)

39.84 ppb

201

201+

Sulfur Dioxide (SO₂)

0.27 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.28 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.32 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2026-10-20T23:00:00.000Z	52 \| moderate	9.741 \| good	40.263 \| good	48.046 \| good	0.342 \| good	7.126 \| good	0.458 \| good
2026-10-21T00:00:00.000Z	44 \| good	7.6 \| good	40.188 \| good	43.045 \| good	0.381 \| good	6.637 \| good	0.39 \| good
2026-10-21T01:00:00.000Z	38 \| good	5.866 \| good	34.059 \| good	40.509 \| good	0.387 \| good	8.513 \| good	0.474 \| good
2026-10-21T02:00:00.000Z	34 \| good	5.748 \| good	31.648 \| good	37.265 \| good	0.367 \| good	9.396 \| good	0.525 \| good
2026-10-21T03:00:00.000Z	28 \| good	2.997 \| good	12.242 \| good	30.082 \| good	0.549 \| good	5.519 \| good	0.131 \| good
2026-10-21T04:00:00.000Z	30 \| good	4.261 \| good	22.431 \| good	32.006 \| good	0.363 \| good	9.195 \| good	0.378 \| good
2026-10-21T05:00:00.000Z	30 \| good	3.415 \| good	23.813 \| good	32.384 \| good	0.703 \| good	10.268 \| good	0.383 \| good
2026-10-21T06:00:00.000Z	26 \| good	3.555 \| good	22.263 \| good	28.488 \| good	0.333 \| good	10.36 \| good	0.323 \| good
2026-10-21T07:00:00.000Z	27 \| good	3.491 \| good	22.133 \| good	29.329 \| good	0.333 \| good	10.36 \| good	0.323 \| good
2026-10-21T08:00:00.000Z	27 \| good	4.805 \| good	22.896 \| good	24.11 \| good	0.327 \| good	11.85 \| good	0.39 \| good
2026-10-21T09:00:00.000Z	27 \| good	5.092 \| good	22.319 \| good	22.102 \| good	0.432 \| good	10.915 \| good	0.315 \| good
2026-10-21T10:00:00.000Z	27 \| good	4.532 \| good	22.621 \| good	16.467 \| good	0.382 \| good	13.384 \| good	0.334 \| good
2026-10-21T11:00:00.000Z	27 \| good	4.611 \| good	22.03 \| good	16.407 \| good	0.391 \| good	16.767 \| good	0.355 \| good
2026-10-21T12:00:00.000Z	27 \| good	4.937 \| good	22.012 \| good	12.055 \| good	0.426 \| good	18.287 \| good	0.359 \| good
2026-10-21T13:00:00.000Z	27 \| good	5.274 \| good	22.005 \| good	12.432 \| good	0.426 \| good	18.287 \| good	0.359 \| good
2026-10-21T14:00:00.000Z	33 \| good	6.28 \| good	28.819 \| good	9.727 \| good	0.428 \| good	19.71 \| good	0.619 \| good
2026-10-21T15:00:00.000Z	44 \| good	7.908 \| good	35.009 \| good	10.058 \| good	0.529 \| good	21.912 \| good	0.706 \| good
2026-10-21T16:00:00.000Z	54 \| moderate	10.971 \| good	42.364 \| good	16.83 \| good	0.592 \| good	20.132 \| good	0.693 \| good
2026-10-21T17:00:00.000Z	52 \| moderate	10.16 \| good	34.894 \| good	18.515 \| good	0.578 \| good	16.251 \| good	0.566 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.109 \| good	36.644 \| good	23.397 \| good	0.425 \| good	15.254 \| good	0.534 \| good
2026-10-21T19:00:00.000Z	44 \| good	7.873 \| good	34.308 \| good	26.861 \| good	0.559 \| good	10.823 \| good	0.416 \| good
2026-10-21T20:00:00.000Z	39 \| good	6.326 \| good	41.596 \| good	29.617 \| good	0.488 \| good	10.888 \| good	0.404 \| good
2026-10-21T21:00:00.000Z	34 \| good	6.448 \| good	36.804 \| good	31.002 \| good	0.537 \| good	11.624 \| good	0.411 \| good
2026-10-21T22:00:00.000Z	43 \| good	5.568 \| good	45.95 \| good	30.61 \| good	0.466 \| good	12.551 \| good	0.399 \| good
2026-10-21T23:00:00.000Z	27 \| good	3.611 \| good	24.968 \| good	28.548 \| good	0.404 \| good	15.977 \| good	0.423 \| good
2026-10-22T00:00:00.000Z	29 \| good	3.45 \| good	21.774 \| good	31.227 \| good	0.417 \| good	14.543 \| good	0.39 \| good
2026-10-22T01:00:00.000Z	28 \| good	5.203 \| good	23.796 \| good	29.673 \| good	0.391 \| good	18.194 \| good	0.525 \| good
2026-10-22T02:00:00.000Z	27 \| good	5.233 \| good	23.912 \| good	26.526 \| good	0.416 \| good	16.037 \| good	0.514 \| good
2026-10-22T03:00:00.000Z	37 \| good	2.879 \| good	11.579 \| good	40.18 \| good	0.289 \| good	7.112 \| good	0.114 \| good
2026-10-22T04:00:00.000Z	33 \| good	5.723 \| good	14.965 \| good	26.872 \| good	0.344 \| good	6.887 \| good	0.351 \| good
2026-10-22T05:00:00.000Z	27 \| good	3.415 \| good	14.552 \| good	28.521 \| good	0.623 \| good	5.239 \| good	0.334 \| good
2026-10-22T06:00:00.000Z	24 \| good	3.181 \| good	11.239 \| good	25.539 \| good	0.237 \| good	5.692 \| good	0.386 \| good
2026-10-22T07:00:00.000Z	24 \| good	3.17 \| good	12.289 \| good	25.996 \| good	0.237 \| good	5.692 \| good	0.386 \| good
2026-10-22T08:00:00.000Z	24 \| good	2.744 \| good	11.071 \| good	26.121 \| good	0.295 \| good	4.309 \| good	0.247 \| good
2026-10-22T09:00:00.000Z	22 \| good	1.602 \| good	9.566 \| good	23.891 \| good	0.382 \| good	4.046 \| good	0.234 \| good
2026-10-22T10:00:00.000Z	22 \| good	1.318 \| good	9.124 \| good	23.618 \| good	0.294 \| good	7.874 \| good	0.234 \| good
2026-10-22T11:00:00.000Z	18 \| good	1.617 \| good	9.615 \| good	19.06 \| good	0.36 \| good	9.372 \| good	0.279 \| good
2026-10-22T12:00:00.000Z	18 \| good	1.591 \| good	10.084 \| good	19.473 \| good	0.294 \| good	10.863 \| good	0.351 \| good
2026-10-22T13:00:00.000Z	19 \| good	1.309 \| good	10.321 \| good	19.614 \| good	0.294 \| good	10.863 \| good	0.351 \| good
2026-10-22T14:00:00.000Z	18 \| good	2.127 \| good	9.199 \| good	17.198 \| good	0.294 \| good	19.492 \| good	0.549 \| good
2026-10-22T15:00:00.000Z	22 \| good	3.213 \| good	11.062 \| good	18.282 \| good	0.245 \| good	22.999 \| good	0.664 \| good
2026-10-22T16:00:00.000Z	19 \| good	2.067 \| good	13.993 \| good	21.446 \| good	0.357 \| good	16.75 \| good	0.653 \| good
2026-10-22T17:00:00.000Z	24 \| good	3.105 \| good	14.339 \| good	26.089 \| good	0.322 \| good	9.897 \| good	0.43 \| good
2026-10-22T18:00:00.000Z	29 \| good	2.858 \| good	11.395 \| good	30.517 \| good	0.27 \| good	8.774 \| good	0.338 \| good
2026-10-22T19:00:00.000Z	33 \| good	2.56 \| good	9.11 \| good	36.266 \| good	0.251 \| good	5.676 \| good	0.322 \| good
2026-10-22T20:00:00.000Z	36 \| good	1.94 \| good	10.76 \| good	39.084 \| good	0.272 \| good	6.088 \| good	0.317 \| good
2026-10-22T21:00:00.000Z	37 \| good	1.951 \| good	10.773 \| good	39.838 \| good	0.265 \| good	5.275 \| good	0.32 \| good
2026-10-22T22:00:00.000Z	37 \| good	1.951 \| good	10.773 \| good	39.838 \| good	0.265 \| good	5.275 \| good	0.32 \| good
2026-10-22T23:00:00.000Z	33 \| good	1.946 \| good	7.711 \| good	36.362 \| good	0.55 \| good	1.952 \| good	0.136 \| good
2026-10-23T00:00:00.000Z	34 \| good	0.974 \| good	3.742 \| good	36.748 \| good	0.606 \| good	2.59 \| good	0.139 \| good
2026-10-23T01:00:00.000Z	30 \| good	1.885 \| good	7.958 \| good	32.153 \| good	0.648 \| good	3.827 \| good	0.142 \| good
2026-10-23T02:00:00.000Z	27 \| good	1.325 \| good	5.236 \| good	29.315 \| good	0.707 \| good	7.64 \| good	0.155 \| good
2026-10-23T03:00:00.000Z	30 \| good	1.31 \| good	5.231 \| good	31.509 \| good	0.811 \| good	11.809 \| good	0.166 \| good
2026-10-23T04:00:00.000Z	28 \| good	0.694 \| good	2.349 \| good	30.113 \| good	0.928 \| good	15.448 \| good	0.175 \| good
2026-10-23T05:00:00.000Z	27 \| good	1.132 \| good	4.363 \| good	29.12 \| good	1.032 \| good	16.896 \| good	0.184 \| good
2026-10-23T06:00:00.000Z	27 \| good	1.943 \| good	8.049 \| good	28.913 \| good	1.062 \| good	17.029 \| good	0.185 \| good
2026-10-23T07:00:00.000Z	27 \| good	2.446 \| good	10.209 \| good	29.215 \| good	1.03 \| good	15.715 \| good	0.178 \| good
2026-10-23T08:00:00.000Z	26 \| good	3.66 \| good	15.887 \| good	28.196 \| good	0.994 \| good	12.985 \| good	0.169 \| good
2026-10-23T09:00:00.000Z	26 \| good	2.577 \| good	10.533 \| good	27.54 \| good	0.924 \| good	11.076 \| good	0.164 \| good
2026-10-23T10:00:00.000Z	25 \| good	3.124 \| good	13.386 \| good	27.091 \| good	0.837 \| good	8.975 \| good	0.157 \| good
2026-10-23T11:00:00.000Z	22 \| good	2.688 \| good	10.757 \| good	24.076 \| good	0.757 \| good	8.332 \| good	0.155 \| good
2026-10-23T12:00:00.000Z	16 \| good	3.157 \| good	13.155 \| good	12.122 \| good	0.712 \| good	8.216 \| good	0.156 \| good
2026-10-23T13:00:00.000Z	27 \| good	4.782 \| good	20.573 \| good	9.02 \| good	0.672 \| good	7.363 \| good	0.154 \| good
2026-10-23T14:00:00.000Z	38 \| good	7.015 \| good	31.107 \| good	7.408 \| good	0.673 \| good	8.735 \| good	0.158 \| good
2026-10-23T15:00:00.000Z	38 \| good	6.576 \| good	28.929 \| good	13.312 \| good	0.694 \| good	8.797 \| good	0.166 \| good
2026-10-23T16:00:00.000Z	22 \| good	3.562 \| good	15.488 \| good	21.417 \| good	0.679 \| good	4.966 \| good	0.147 \| good
2026-10-23T17:00:00.000Z	25 \| good	2.946 \| good	12.363 \| good	27.027 \| good	0.717 \| good	3.739 \| good	0.14 \| good
2026-10-23T18:00:00.000Z	30 \| good	3.125 \| good	13.057 \| good	32.14 \| good	0.818 \| good	3.48 \| good	0.137 \| good
2026-10-23T19:00:00.000Z	32 \| good	4.357 \| good	19.303 \| good	35.251 \| good	0.975 \| good	3.397 \| good	0.137 \| good
2026-10-23T20:00:00.000Z	36 \| good	5.832 \| good	25.837 \| good	38.631 \| good	1.138 \| good	3.175 \| good	0.136 \| good
2026-10-23T21:00:00.000Z	36 \| good	5.78 \| good	25.123 \| good	39.025 \| good	1.275 \| good	3.215 \| good	0.136 \| good
2026-10-23T22:00:00.000Z	38 \| good	5.688 \| good	24.688 \| good	40.543 \| good	1.407 \| good	3.361 \| good	0.137 \| good
2026-10-23T23:00:00.000Z	40 \| good	5.688 \| good	24.506 \| good	42.895 \| good	1.556 \| good	3.889 \| good	0.139 \| good
2026-10-24T00:00:00.000Z	41 \| good	5.944 \| good	26.015 \| good	44.058 \| good	1.668 \| good	4.827 \| good	0.141 \| good
2026-10-24T01:00:00.000Z	39 \| good	6.765 \| good	30.012 \| good	41.668 \| good	1.717 \| good	6.77 \| good	0.145 \| good
2026-10-24T02:00:00.000Z	34 \| good	5.316 \| good	22.847 \| good	37.254 \| good	1.775 \| good	11.113 \| good	0.158 \| good
2026-10-24T03:00:00.000Z	38 \| good	6.696 \| good	29.856 \| good	36.055 \| good	1.825 \| good	14.917 \| good	0.169 \| good
2026-10-24T04:00:00.000Z	44 \| good	8.334 \| good	36.923 \| good	27.992 \| good	1.878 \| good	18.119 \| good	0.179 \| good
2026-10-24T05:00:00.000Z	52 \| moderate	10.385 \| good	46.179 \| good	23.402 \| good	1.932 \| good	19.382 \| good	0.189 \| good
2026-10-24T06:00:00.000Z	49 \| good	9.008 \| good	39.641 \| good	22.154 \| good	1.98 \| good	20.216 \| good	0.195 \| good
2026-10-24T07:00:00.000Z	49 \| good	9.353 \| good	41.26 \| good	19.36 \| good	1.992 \| good	20.173 \| good	0.203 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	12.17 \| fine	54.113 \| good	18.884 \| good	1.932 \| good	19.538 \| good	0.205 \| good
2026-10-24T09:00:00.000Z	58 \| moderate	12.785 \| fine	57.102 \| fine	21.29 \| good	1.852 \| good	18.774 \| good	0.205 \| good
2026-10-24T10:00:00.000Z	60 \| moderate	14.04 \| fine	62.496 \| fine	21.841 \| good	1.739 \| good	17.731 \| good	0.206 \| good
2026-10-24T11:00:00.000Z	62 \| moderate	14.835 \| fine	66.034 \| fine	20.302 \| good	1.62 \| good	16.73 \| good	0.207 \| good
2026-10-24T12:00:00.000Z	64 \| moderate	16.167 \| fine	71.645 \| fine	19.426 \| good	1.517 \| good	15.857 \| good	0.207 \| good
2026-10-24T13:00:00.000Z	67 \| moderate	17.911 \| fine	79.35 \| fine	21.98 \| good	1.432 \| good	15.144 \| good	0.208 \| good
2026-10-24T14:00:00.000Z	73 \| moderate	20.936 \| fine	91.939 \| fine	25.882 \| good	1.394 \| good	14.972 \| good	0.213 \| good
2026-10-24T15:00:00.000Z	69 \| moderate	18.982 \| fine	84.231 \| fine	23.779 \| good	1.333 \| good	14.288 \| good	0.227 \| good
2026-10-24T16:00:00.000Z	60 \| moderate	14.434 \| fine	65.025 \| fine	29.978 \| good	1.371 \| good	12.282 \| good	0.226 \| good
2026-10-24T17:00:00.000Z	56 \| moderate	11.669 \| good	51.658 \| good	37.267 \| good	1.561 \| good	9.765 \| good	0.186 \| good
2026-10-24T18:00:00.000Z	54 \| moderate	10.807 \| good	47.704 \| good	41.063 \| good	1.861 \| good	7.18 \| good	0.168 \| good
2026-10-24T19:00:00.000Z	54 \| moderate	11.441 \| good	50.521 \| good	45.537 \| good	1.905 \| good	5.929 \| good	0.162 \| good
2026-10-24T20:00:00.000Z	54 \| moderate	11.106 \| good	48.974 \| good	49.53 \| good	1.88 \| good	5.117 \| good	0.158 \| good
2026-10-24T21:00:00.000Z	52 \| moderate	9.505 \| good	42.357 \| good	51.387 \| good	1.87 \| good	4.716 \| good	0.156 \| good
2026-10-24T22:00:00.000Z	48 \| good	7.186 \| good	31.886 \| good	52.279 \| good	1.908 \| good	4.706 \| good	0.155 \| good

Westminster

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Westminster, California air quality map: Track AQI near you

0.19ppm

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 10:00:00 on 2026-10-21.

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 02:00:00 on 2026-10-22.

What is the current air quality in Westminster, California?

The current air quality in Westminster, California is 37, 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 O3.

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 1.951 μg/m³.

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

The current PM₁₀ concentration at Westminster, California is 10.773 μg/m³.

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

The current carbon monoxide (CO) concentration at Westminster, California is 0.32 ppm.

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

The current sulfur dioxide (SO₂) concentration at Westminster, California is 0.265 ppb.

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

The current ozone (O₃) concentration at Westminster, California is 39.838 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Westminster, California is 5.275 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T23:00:00.000Z	52 \| moderate	9.741 \| good	40.263 \| good	48.046 \| good	0.342 \| good	7.126 \| good	0.458 \| good
2026-10-21T00:00:00.000Z	44 \| good	7.6 \| good	40.188 \| good	43.045 \| good	0.381 \| good	6.637 \| good	0.39 \| good
2026-10-21T01:00:00.000Z	38 \| good	5.866 \| good	34.059 \| good	40.509 \| good	0.387 \| good	8.513 \| good	0.474 \| good
2026-10-21T02:00:00.000Z	34 \| good	5.748 \| good	31.648 \| good	37.265 \| good	0.367 \| good	9.396 \| good	0.525 \| good
2026-10-21T03:00:00.000Z	28 \| good	2.997 \| good	12.242 \| good	30.082 \| good	0.549 \| good	5.519 \| good	0.131 \| good
2026-10-21T04:00:00.000Z	30 \| good	4.261 \| good	22.431 \| good	32.006 \| good	0.363 \| good	9.195 \| good	0.378 \| good
2026-10-21T05:00:00.000Z	30 \| good	3.415 \| good	23.813 \| good	32.384 \| good	0.703 \| good	10.268 \| good	0.383 \| good
2026-10-21T06:00:00.000Z	26 \| good	3.555 \| good	22.263 \| good	28.488 \| good	0.333 \| good	10.36 \| good	0.323 \| good
2026-10-21T07:00:00.000Z	27 \| good	3.491 \| good	22.133 \| good	29.329 \| good	0.333 \| good	10.36 \| good	0.323 \| good
2026-10-21T08:00:00.000Z	27 \| good	4.805 \| good	22.896 \| good	24.11 \| good	0.327 \| good	11.85 \| good	0.39 \| good
2026-10-21T09:00:00.000Z	27 \| good	5.092 \| good	22.319 \| good	22.102 \| good	0.432 \| good	10.915 \| good	0.315 \| good
2026-10-21T10:00:00.000Z	27 \| good	4.532 \| good	22.621 \| good	16.467 \| good	0.382 \| good	13.384 \| good	0.334 \| good
2026-10-21T11:00:00.000Z	27 \| good	4.611 \| good	22.03 \| good	16.407 \| good	0.391 \| good	16.767 \| good	0.355 \| good
2026-10-21T12:00:00.000Z	27 \| good	4.937 \| good	22.012 \| good	12.055 \| good	0.426 \| good	18.287 \| good	0.359 \| good
2026-10-21T13:00:00.000Z	27 \| good	5.274 \| good	22.005 \| good	12.432 \| good	0.426 \| good	18.287 \| good	0.359 \| good
2026-10-21T14:00:00.000Z	33 \| good	6.28 \| good	28.819 \| good	9.727 \| good	0.428 \| good	19.71 \| good	0.619 \| good
2026-10-21T15:00:00.000Z	44 \| good	7.908 \| good	35.009 \| good	10.058 \| good	0.529 \| good	21.912 \| good	0.706 \| good
2026-10-21T16:00:00.000Z	54 \| moderate	10.971 \| good	42.364 \| good	16.83 \| good	0.592 \| good	20.132 \| good	0.693 \| good
2026-10-21T17:00:00.000Z	52 \| moderate	10.16 \| good	34.894 \| good	18.515 \| good	0.578 \| good	16.251 \| good	0.566 \| good
2026-10-21T18:00:00.000Z	49 \| good	9.109 \| good	36.644 \| good	23.397 \| good	0.425 \| good	15.254 \| good	0.534 \| good
2026-10-21T19:00:00.000Z	44 \| good	7.873 \| good	34.308 \| good	26.861 \| good	0.559 \| good	10.823 \| good	0.416 \| good
2026-10-21T20:00:00.000Z	39 \| good	6.326 \| good	41.596 \| good	29.617 \| good	0.488 \| good	10.888 \| good	0.404 \| good
2026-10-21T21:00:00.000Z	34 \| good	6.448 \| good	36.804 \| good	31.002 \| good	0.537 \| good	11.624 \| good	0.411 \| good
2026-10-21T22:00:00.000Z	43 \| good	5.568 \| good	45.95 \| good	30.61 \| good	0.466 \| good	12.551 \| good	0.399 \| good
2026-10-21T23:00:00.000Z	27 \| good	3.611 \| good	24.968 \| good	28.548 \| good	0.404 \| good	15.977 \| good	0.423 \| good
2026-10-22T00:00:00.000Z	29 \| good	3.45 \| good	21.774 \| good	31.227 \| good	0.417 \| good	14.543 \| good	0.39 \| good
2026-10-22T01:00:00.000Z	28 \| good	5.203 \| good	23.796 \| good	29.673 \| good	0.391 \| good	18.194 \| good	0.525 \| good
2026-10-22T02:00:00.000Z	27 \| good	5.233 \| good	23.912 \| good	26.526 \| good	0.416 \| good	16.037 \| good	0.514 \| good
2026-10-22T03:00:00.000Z	37 \| good	2.879 \| good	11.579 \| good	40.18 \| good	0.289 \| good	7.112 \| good	0.114 \| good
2026-10-22T04:00:00.000Z	33 \| good	5.723 \| good	14.965 \| good	26.872 \| good	0.344 \| good	6.887 \| good	0.351 \| good
2026-10-22T05:00:00.000Z	27 \| good	3.415 \| good	14.552 \| good	28.521 \| good	0.623 \| good	5.239 \| good	0.334 \| good
2026-10-22T06:00:00.000Z	24 \| good	3.181 \| good	11.239 \| good	25.539 \| good	0.237 \| good	5.692 \| good	0.386 \| good
2026-10-22T07:00:00.000Z	24 \| good	3.17 \| good	12.289 \| good	25.996 \| good	0.237 \| good	5.692 \| good	0.386 \| good
2026-10-22T08:00:00.000Z	24 \| good	2.744 \| good	11.071 \| good	26.121 \| good	0.295 \| good	4.309 \| good	0.247 \| good
2026-10-22T09:00:00.000Z	22 \| good	1.602 \| good	9.566 \| good	23.891 \| good	0.382 \| good	4.046 \| good	0.234 \| good
2026-10-22T10:00:00.000Z	22 \| good	1.318 \| good	9.124 \| good	23.618 \| good	0.294 \| good	7.874 \| good	0.234 \| good
2026-10-22T11:00:00.000Z	18 \| good	1.617 \| good	9.615 \| good	19.06 \| good	0.36 \| good	9.372 \| good	0.279 \| good
2026-10-22T12:00:00.000Z	18 \| good	1.591 \| good	10.084 \| good	19.473 \| good	0.294 \| good	10.863 \| good	0.351 \| good
2026-10-22T13:00:00.000Z	19 \| good	1.309 \| good	10.321 \| good	19.614 \| good	0.294 \| good	10.863 \| good	0.351 \| good
2026-10-22T14:00:00.000Z	18 \| good	2.127 \| good	9.199 \| good	17.198 \| good	0.294 \| good	19.492 \| good	0.549 \| good
2026-10-22T15:00:00.000Z	22 \| good	3.213 \| good	11.062 \| good	18.282 \| good	0.245 \| good	22.999 \| good	0.664 \| good
2026-10-22T16:00:00.000Z	19 \| good	2.067 \| good	13.993 \| good	21.446 \| good	0.357 \| good	16.75 \| good	0.653 \| good
2026-10-22T17:00:00.000Z	24 \| good	3.105 \| good	14.339 \| good	26.089 \| good	0.322 \| good	9.897 \| good	0.43 \| good
2026-10-22T18:00:00.000Z	29 \| good	2.858 \| good	11.395 \| good	30.517 \| good	0.27 \| good	8.774 \| good	0.338 \| good
2026-10-22T19:00:00.000Z	33 \| good	2.56 \| good	9.11 \| good	36.266 \| good	0.251 \| good	5.676 \| good	0.322 \| good
2026-10-22T20:00:00.000Z	36 \| good	1.94 \| good	10.76 \| good	39.084 \| good	0.272 \| good	6.088 \| good	0.317 \| good
2026-10-22T21:00:00.000Z	37 \| good	1.951 \| good	10.773 \| good	39.838 \| good	0.265 \| good	5.275 \| good	0.32 \| good
2026-10-22T22:00:00.000Z	37 \| good	1.951 \| good	10.773 \| good	39.838 \| good	0.265 \| good	5.275 \| good	0.32 \| good
2026-10-22T23:00:00.000Z	33 \| good	1.946 \| good	7.711 \| good	36.362 \| good	0.55 \| good	1.952 \| good	0.136 \| good
2026-10-23T00:00:00.000Z	34 \| good	0.974 \| good	3.742 \| good	36.748 \| good	0.606 \| good	2.59 \| good	0.139 \| good
2026-10-23T01:00:00.000Z	30 \| good	1.885 \| good	7.958 \| good	32.153 \| good	0.648 \| good	3.827 \| good	0.142 \| good
2026-10-23T02:00:00.000Z	27 \| good	1.325 \| good	5.236 \| good	29.315 \| good	0.707 \| good	7.64 \| good	0.155 \| good
2026-10-23T03:00:00.000Z	30 \| good	1.31 \| good	5.231 \| good	31.509 \| good	0.811 \| good	11.809 \| good	0.166 \| good
2026-10-23T04:00:00.000Z	28 \| good	0.694 \| good	2.349 \| good	30.113 \| good	0.928 \| good	15.448 \| good	0.175 \| good
2026-10-23T05:00:00.000Z	27 \| good	1.132 \| good	4.363 \| good	29.12 \| good	1.032 \| good	16.896 \| good	0.184 \| good
2026-10-23T06:00:00.000Z	27 \| good	1.943 \| good	8.049 \| good	28.913 \| good	1.062 \| good	17.029 \| good	0.185 \| good
2026-10-23T07:00:00.000Z	27 \| good	2.446 \| good	10.209 \| good	29.215 \| good	1.03 \| good	15.715 \| good	0.178 \| good
2026-10-23T08:00:00.000Z	26 \| good	3.66 \| good	15.887 \| good	28.196 \| good	0.994 \| good	12.985 \| good	0.169 \| good
2026-10-23T09:00:00.000Z	26 \| good	2.577 \| good	10.533 \| good	27.54 \| good	0.924 \| good	11.076 \| good	0.164 \| good
2026-10-23T10:00:00.000Z	25 \| good	3.124 \| good	13.386 \| good	27.091 \| good	0.837 \| good	8.975 \| good	0.157 \| good
2026-10-23T11:00:00.000Z	22 \| good	2.688 \| good	10.757 \| good	24.076 \| good	0.757 \| good	8.332 \| good	0.155 \| good
2026-10-23T12:00:00.000Z	16 \| good	3.157 \| good	13.155 \| good	12.122 \| good	0.712 \| good	8.216 \| good	0.156 \| good
2026-10-23T13:00:00.000Z	27 \| good	4.782 \| good	20.573 \| good	9.02 \| good	0.672 \| good	7.363 \| good	0.154 \| good
2026-10-23T14:00:00.000Z	38 \| good	7.015 \| good	31.107 \| good	7.408 \| good	0.673 \| good	8.735 \| good	0.158 \| good
2026-10-23T15:00:00.000Z	38 \| good	6.576 \| good	28.929 \| good	13.312 \| good	0.694 \| good	8.797 \| good	0.166 \| good
2026-10-23T16:00:00.000Z	22 \| good	3.562 \| good	15.488 \| good	21.417 \| good	0.679 \| good	4.966 \| good	0.147 \| good
2026-10-23T17:00:00.000Z	25 \| good	2.946 \| good	12.363 \| good	27.027 \| good	0.717 \| good	3.739 \| good	0.14 \| good
2026-10-23T18:00:00.000Z	30 \| good	3.125 \| good	13.057 \| good	32.14 \| good	0.818 \| good	3.48 \| good	0.137 \| good
2026-10-23T19:00:00.000Z	32 \| good	4.357 \| good	19.303 \| good	35.251 \| good	0.975 \| good	3.397 \| good	0.137 \| good
2026-10-23T20:00:00.000Z	36 \| good	5.832 \| good	25.837 \| good	38.631 \| good	1.138 \| good	3.175 \| good	0.136 \| good
2026-10-23T21:00:00.000Z	36 \| good	5.78 \| good	25.123 \| good	39.025 \| good	1.275 \| good	3.215 \| good	0.136 \| good
2026-10-23T22:00:00.000Z	38 \| good	5.688 \| good	24.688 \| good	40.543 \| good	1.407 \| good	3.361 \| good	0.137 \| good
2026-10-23T23:00:00.000Z	40 \| good	5.688 \| good	24.506 \| good	42.895 \| good	1.556 \| good	3.889 \| good	0.139 \| good
2026-10-24T00:00:00.000Z	41 \| good	5.944 \| good	26.015 \| good	44.058 \| good	1.668 \| good	4.827 \| good	0.141 \| good
2026-10-24T01:00:00.000Z	39 \| good	6.765 \| good	30.012 \| good	41.668 \| good	1.717 \| good	6.77 \| good	0.145 \| good
2026-10-24T02:00:00.000Z	34 \| good	5.316 \| good	22.847 \| good	37.254 \| good	1.775 \| good	11.113 \| good	0.158 \| good
2026-10-24T03:00:00.000Z	38 \| good	6.696 \| good	29.856 \| good	36.055 \| good	1.825 \| good	14.917 \| good	0.169 \| good
2026-10-24T04:00:00.000Z	44 \| good	8.334 \| good	36.923 \| good	27.992 \| good	1.878 \| good	18.119 \| good	0.179 \| good
2026-10-24T05:00:00.000Z	52 \| moderate	10.385 \| good	46.179 \| good	23.402 \| good	1.932 \| good	19.382 \| good	0.189 \| good
2026-10-24T06:00:00.000Z	49 \| good	9.008 \| good	39.641 \| good	22.154 \| good	1.98 \| good	20.216 \| good	0.195 \| good
2026-10-24T07:00:00.000Z	49 \| good	9.353 \| good	41.26 \| good	19.36 \| good	1.992 \| good	20.173 \| good	0.203 \| good
2026-10-24T08:00:00.000Z	56 \| moderate	12.17 \| fine	54.113 \| good	18.884 \| good	1.932 \| good	19.538 \| good	0.205 \| good
2026-10-24T09:00:00.000Z	58 \| moderate	12.785 \| fine	57.102 \| fine	21.29 \| good	1.852 \| good	18.774 \| good	0.205 \| good
2026-10-24T10:00:00.000Z	60 \| moderate	14.04 \| fine	62.496 \| fine	21.841 \| good	1.739 \| good	17.731 \| good	0.206 \| good
2026-10-24T11:00:00.000Z	62 \| moderate	14.835 \| fine	66.034 \| fine	20.302 \| good	1.62 \| good	16.73 \| good	0.207 \| good
2026-10-24T12:00:00.000Z	64 \| moderate	16.167 \| fine	71.645 \| fine	19.426 \| good	1.517 \| good	15.857 \| good	0.207 \| good
2026-10-24T13:00:00.000Z	67 \| moderate	17.911 \| fine	79.35 \| fine	21.98 \| good	1.432 \| good	15.144 \| good	0.208 \| good
2026-10-24T14:00:00.000Z	73 \| moderate	20.936 \| fine	91.939 \| fine	25.882 \| good	1.394 \| good	14.972 \| good	0.213 \| good
2026-10-24T15:00:00.000Z	69 \| moderate	18.982 \| fine	84.231 \| fine	23.779 \| good	1.333 \| good	14.288 \| good	0.227 \| good
2026-10-24T16:00:00.000Z	60 \| moderate	14.434 \| fine	65.025 \| fine	29.978 \| good	1.371 \| good	12.282 \| good	0.226 \| good
2026-10-24T17:00:00.000Z	56 \| moderate	11.669 \| good	51.658 \| good	37.267 \| good	1.561 \| good	9.765 \| good	0.186 \| good
2026-10-24T18:00:00.000Z	54 \| moderate	10.807 \| good	47.704 \| good	41.063 \| good	1.861 \| good	7.18 \| good	0.168 \| good
2026-10-24T19:00:00.000Z	54 \| moderate	11.441 \| good	50.521 \| good	45.537 \| good	1.905 \| good	5.929 \| good	0.162 \| good
2026-10-24T20:00:00.000Z	54 \| moderate	11.106 \| good	48.974 \| good	49.53 \| good	1.88 \| good	5.117 \| good	0.158 \| good
2026-10-24T21:00:00.000Z	52 \| moderate	9.505 \| good	42.357 \| good	51.387 \| good	1.87 \| good	4.716 \| good	0.156 \| good
2026-10-24T22:00:00.000Z	48 \| good	7.186 \| good	31.886 \| good	52.279 \| good	1.908 \| good	4.706 \| good	0.155 \| 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?