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

The current PM10 concentration at Westminster, California is 46.71 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Westminster, California is 0.68 ppb.

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

The current ozone (O3) concentration at Westminster, California is 3.363 ppm.

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

The current nitrogen dioxide (NO2) concentration at Westminster, California is 19.779 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 23.714 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)

23.71 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

46.71 μg/m³

155

255

425

605+

Ozone (O₃)

3.36 ppb

201

201+

Sulfur Dioxide (SO₂)

0.68 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

19.78 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

1.30 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
2026-01-21T18:00:00.000Z	84 \| moderate	26.62 \| fine	62.293 \| fine	12.432 \| good	0.455 \| good	22.036 \| good	0.649 \| good
2026-01-21T19:00:00.000Z	79 \| moderate	23.855 \| fine	57.472 \| fine	16.243 \| good	0.575 \| good	24.343 \| good	0.775 \| good
2026-01-21T20:00:00.000Z	75 \| moderate	21.923 \| fine	63.659 \| fine	18.564 \| good	0.645 \| good	23.807 \| good	0.677 \| good
2026-01-21T21:00:00.000Z	84 \| moderate	27.273 \| fine	59.538 \| fine	21.981 \| good	0.402 \| good	24.798 \| good	0.744 \| good
2026-01-21T22:00:00.000Z	77 \| moderate	22.783 \| fine	49.676 \| good	22.527 \| good	0.461 \| good	23.06 \| good	0.742 \| good
2026-01-21T23:00:00.000Z	69 \| moderate	18.856 \| fine	48.053 \| good	24.511 \| good	0.508 \| good	24.769 \| good	0.686 \| good
2026-01-22T00:00:00.000Z	75 \| moderate	22.347 \| fine	48.451 \| good	26.626 \| good	0.597 \| good	20.783 \| good	0.686 \| good
2026-01-22T01:00:00.000Z	84 \| moderate	27.215 \| fine	56.624 \| fine	25.974 \| good	0.4 \| good	24.043 \| good	0.754 \| good
2026-01-22T02:00:00.000Z	88 \| moderate	29.294 \| fine	56.412 \| fine	23.768 \| good	0.38 \| good	24.973 \| good	0.718 \| good
2026-01-22T03:00:00.000Z	92 \| moderate	30.882 \| fine	56.669 \| fine	18.578 \| good	0.409 \| good	29.066 \| good	0.789 \| good
2026-01-22T04:00:00.000Z	92 \| moderate	30.528 \| fine	60.504 \| fine	16.089 \| good	0.477 \| good	28.813 \| good	0.776 \| good
2026-01-22T05:00:00.000Z	97 \| moderate	34.095 \| fine	60.718 \| fine	14.733 \| good	0.769 \| good	28.584 \| good	0.746 \| good
2026-01-22T06:00:00.000Z	102 \| sensitive	35.526 \| moderate	69.825 \| fine	12.034 \| good	0.547 \| good	31.383 \| good	0.871 \| good
2026-01-22T07:00:00.000Z	97 \| moderate	33.928 \| fine	71.198 \| fine	13.659 \| good	0.57 \| good	31.465 \| good	0.933 \| good
2026-01-22T08:00:00.000Z	90 \| moderate	29.546 \| fine	54.376 \| good	9.395 \| good	0.59 \| good	29.846 \| good	0.948 \| good
2026-01-22T09:00:00.000Z	86 \| moderate	27.549 \| fine	55.403 \| fine	5.352 \| good	0.545 \| good	26.394 \| good	0.861 \| good
2026-01-22T10:00:00.000Z	86 \| moderate	28.116 \| fine	63.652 \| fine	5.142 \| good	0.527 \| good	25.645 \| good	0.73 \| good
2026-01-22T11:00:00.000Z	84 \| moderate	26.911 \| fine	65.726 \| fine	8.663 \| good	0.471 \| good	26.359 \| good	0.607 \| good
2026-01-22T12:00:00.000Z	94 \| moderate	32.089 \| fine	76.072 \| fine	4.365 \| good	0.669 \| good	25.982 \| good	0.626 \| good
2026-01-22T13:00:00.000Z	92 \| moderate	30.737 \| fine	60.871 \| fine	6.227 \| good	0.667 \| good	25.982 \| good	0.626 \| good
2026-01-22T14:00:00.000Z	88 \| moderate	28.906 \| fine	60.581 \| fine	4.303 \| good	0.398 \| good	26.059 \| good	0.858 \| good
2026-01-22T15:00:00.000Z	84 \| moderate	27.283 \| fine	65.084 \| fine	5.217 \| good	0.469 \| good	25.249 \| good	0.998 \| good
2026-01-22T16:00:00.000Z	84 \| moderate	26.534 \| fine	49.726 \| good	7.448 \| good	0.558 \| good	27.603 \| good	0.911 \| good
2026-01-22T17:00:00.000Z	90 \| moderate	30.394 \| fine	54.83 \| good	9.76 \| good	0.626 \| good	27.126 \| good	0.779 \| good
2026-01-22T18:00:00.000Z	122 \| sensitive	43.804 \| moderate	81.657 \| fine	12.831 \| good	0.548 \| good	20.629 \| good	0.565 \| good
2026-01-22T19:00:00.000Z	99 \| moderate	34.667 \| fine	52.738 \| good	14.064 \| good	0.454 \| good	23.394 \| good	0.686 \| good
2026-01-22T20:00:00.000Z	92 \| moderate	31.382 \| fine	58.901 \| fine	16.614 \| good	0.454 \| good	22.676 \| good	0.57 \| good
2026-01-22T21:00:00.000Z	84 \| moderate	26.579 \| fine	48.113 \| good	17.361 \| good	0.489 \| good	23.253 \| good	0.555 \| good
2026-01-22T22:00:00.000Z	94 \| moderate	32.342 \| fine	61.069 \| fine	18.239 \| good	0.742 \| good	23.808 \| good	0.541 \| good
2026-01-22T23:00:00.000Z	90 \| moderate	30.169 \| fine	52.593 \| good	17.257 \| good	0.532 \| good	28.659 \| good	0.667 \| good
2026-01-23T00:00:00.000Z	92 \| moderate	31.417 \| fine	50.5 \| good	20.106 \| good	0.288 \| good	26.849 \| good	0.735 \| good
2026-01-23T01:00:00.000Z	67 \| moderate	18.34 \| fine	31.616 \| good	16.692 \| good	0.304 \| good	19.238 \| good	0.532 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.068 \| fine	27.74 \| good	16.119 \| good	0.321 \| good	20.465 \| good	0.538 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	10.991 \| good	32.35 \| good	15.608 \| good	0.274 \| good	23.777 \| good	0.539 \| good
2026-01-23T04:00:00.000Z	60 \| moderate	14.315 \| fine	32.566 \| good	17.35 \| good	0.309 \| good	24.347 \| good	0.464 \| good
2026-01-23T05:00:00.000Z	60 \| moderate	13.587 \| fine	33.655 \| good	13.669 \| good	0.55 \| good	27.671 \| good	0.717 \| good
2026-01-23T06:00:00.000Z	60 \| moderate	13.967 \| fine	35.887 \| good	12.163 \| good	0.425 \| good	26.377 \| good	0.715 \| good
2026-01-23T07:00:00.000Z	64 \| moderate	15.999 \| fine	33.068 \| good	11.981 \| good	0.416 \| good	26.377 \| good	0.715 \| good
2026-01-23T08:00:00.000Z	66 \| moderate	17.384 \| fine	40.171 \| good	5.469 \| good	0.634 \| good	25.326 \| good	0.701 \| good
2026-01-23T09:00:00.000Z	58 \| moderate	12.521 \| fine	30.978 \| good	4.775 \| good	0.329 \| good	24.238 \| good	0.836 \| good
2026-01-23T10:00:00.000Z	64 \| moderate	16.081 \| fine	32.505 \| good	8.106 \| good	0.485 \| good	23.019 \| good	0.89 \| good
2026-01-23T11:00:00.000Z	64 \| moderate	15.983 \| fine	30.169 \| good	7.066 \| good	0.411 \| good	22.029 \| good	0.693 \| good
2026-01-23T12:00:00.000Z	73 \| moderate	20.979 \| fine	32.306 \| good	6.172 \| good	0.448 \| good	19.544 \| good	0.568 \| good
2026-01-23T13:00:00.000Z	67 \| moderate	18.368 \| fine	30.217 \| good	4.593 \| good	0.449 \| good	19.544 \| good	0.568 \| good
2026-01-23T14:00:00.000Z	73 \| moderate	21.486 \| fine	37.403 \| good	3.481 \| good	0.248 \| good	20.75 \| good	0.645 \| good
2026-01-23T15:00:00.000Z	77 \| moderate	23.231 \| fine	33.779 \| good	2.928 \| good	0.516 \| good	19.917 \| good	0.949 \| good
2026-01-23T16:00:00.000Z	79 \| moderate	24.257 \| fine	45.548 \| good	3.318 \| good	0.675 \| good	19.644 \| good	1.286 \| good
2026-01-23T17:00:00.000Z	79 \| moderate	23.714 \| fine	46.71 \| good	3.363 \| good	0.68 \| good	19.779 \| good	1.301 \| good
2026-01-23T18:00:00.000Z	66 \| moderate	16.87 \| fine	74.622 \| fine	18.36 \| good	3.989 \| good	16.327 \| good	0.223 \| good
2026-01-23T19:00:00.000Z	60 \| moderate	13.945 \| fine	62.042 \| fine	23.729 \| good	4.357 \| good	15.898 \| good	0.208 \| good
2026-01-23T20:00:00.000Z	62 \| moderate	14.68 \| fine	65.588 \| fine	29.9 \| good	4.724 \| good	15.47 \| good	0.192 \| good
2026-01-23T21:00:00.000Z	58 \| moderate	13.424 \| fine	60.189 \| fine	32.432 \| good	5.092 \| good	15.041 \| good	0.177 \| good
2026-01-23T22:00:00.000Z	49 \| good	9.362 \| good	41.721 \| good	32.506 \| good	5.183 \| good	15.922 \| good	0.175 \| good
2026-01-23T23:00:00.000Z	44 \| good	7.506 \| good	32.93 \| good	32.958 \| good	5.274 \| good	16.802 \| good	0.172 \| good
2026-01-24T00:00:00.000Z	31 \| good	1.509 \| good	6.066 \| good	33.373 \| good	5.365 \| good	17.682 \| good	0.17 \| good
2026-01-24T01:00:00.000Z	31 \| good	4.426 \| good	19.118 \| good	32.743 \| good	5.342 \| good	21.366 \| good	0.196 \| good
2026-01-24T02:00:00.000Z	24 \| good	3.324 \| good	14.367 \| good	26.244 \| good	5.318 \| good	25.049 \| good	0.222 \| good
2026-01-24T03:00:00.000Z	38 \| good	6.885 \| good	30.427 \| good	21.399 \| good	5.295 \| good	28.732 \| good	0.248 \| good
2026-01-24T04:00:00.000Z	56 \| moderate	12.291 \| fine	54.997 \| good	9.154 \| good	5.53 \| good	28.62 \| good	0.251 \| good
2026-01-24T05:00:00.000Z	54 \| moderate	10.764 \| good	47.813 \| good	6.076 \| good	5.765 \| good	28.508 \| good	0.255 \| good
2026-01-24T06:00:00.000Z	44 \| good	8.356 \| good	36.583 \| good	4.804 \| good	6.001 \| good	28.396 \| good	0.258 \| good
2026-01-24T07:00:00.000Z	44 \| good	7.661 \| good	33.913 \| good	7.268 \| good	5.935 \| good	27.004 \| good	0.254 \| good
2026-01-24T08:00:00.000Z	52 \| moderate	9.765 \| good	43.304 \| good	9.047 \| good	5.869 \| good	25.611 \| good	0.25 \| good
2026-01-24T09:00:00.000Z	62 \| moderate	15.102 \| fine	66.961 \| fine	9.908 \| good	5.804 \| good	24.218 \| good	0.247 \| good
2026-01-24T10:00:00.000Z	62 \| moderate	15.127 \| fine	67.702 \| fine	14.29 \| good	5.746 \| good	23.082 \| good	0.238 \| good
2026-01-24T11:00:00.000Z	64 \| moderate	15.563 \| fine	69.758 \| fine	21.324 \| good	5.689 \| good	21.945 \| good	0.229 \| good
2026-01-24T12:00:00.000Z	60 \| moderate	14.035 \| fine	62.921 \| fine	19.313 \| good	5.631 \| good	20.808 \| good	0.221 \| good
2026-01-24T13:00:00.000Z	52 \| moderate	10.187 \| good	45.511 \| good	22.199 \| good	5.666 \| good	20.664 \| good	0.228 \| good
2026-01-24T14:00:00.000Z	56 \| moderate	11.514 \| good	51.659 \| good	20.945 \| good	5.701 \| good	20.521 \| good	0.236 \| good
2026-01-24T15:00:00.000Z	52 \| moderate	9.671 \| good	42.846 \| good	19.887 \| good	5.736 \| good	20.377 \| good	0.244 \| good
2026-01-24T16:00:00.000Z	38 \| good	7.14 \| good	31.595 \| good	21.36 \| good	5.552 \| good	16.972 \| good	0.225 \| good
2026-01-24T17:00:00.000Z	49 \| good	9.245 \| good	41.419 \| good	22.356 \| good	5.369 \| good	13.568 \| good	0.206 \| good
2026-01-24T18:00:00.000Z	44 \| good	7.631 \| good	33.572 \| good	25.177 \| good	5.186 \| good	10.164 \| good	0.188 \| good
2026-01-24T19:00:00.000Z	26 \| good	2.293 \| good	9.625 \| good	28.359 \| good	5.06 \| good	9.556 \| good	0.183 \| good
2026-01-24T20:00:00.000Z	29 \| good	4.243 \| good	18.404 \| good	30.722 \| good	4.934 \| good	8.949 \| good	0.179 \| good
2026-01-24T21:00:00.000Z	29 \| good	4.849 \| good	21.008 \| good	31.357 \| good	4.809 \| good	8.342 \| good	0.174 \| good
2026-01-24T22:00:00.000Z	44 \| good	7.755 \| good	34.197 \| good	31.897 \| good	4.698 \| good	8.735 \| good	0.173 \| good
2026-01-24T23:00:00.000Z	54 \| moderate	11.37 \| good	50.479 \| good	32.377 \| good	4.588 \| good	9.129 \| good	0.172 \| good
2026-01-25T00:00:00.000Z	29 \| good	3.393 \| good	14.156 \| good	30.976 \| good	4.477 \| good	9.523 \| good	0.172 \| good
2026-01-25T01:00:00.000Z	49 \| good	8.886 \| good	39.011 \| good	27.446 \| good	4.487 \| good	14.683 \| good	0.198 \| good
2026-01-25T02:00:00.000Z	52 \| moderate	10.176 \| good	45.036 \| good	23.666 \| good	4.497 \| good	19.844 \| good	0.224 \| good
2026-01-25T03:00:00.000Z	58 \| moderate	13.312 \| fine	59.888 \| fine	16.183 \| good	4.506 \| good	25.005 \| good	0.25 \| good
2026-01-25T04:00:00.000Z	67 \| moderate	18.136 \| fine	80.594 \| fine	8.408 \| good	4.931 \| good	25.502 \| good	0.278 \| good
2026-01-25T05:00:00.000Z	66 \| moderate	16.958 \| fine	74.944 \| fine	4.018 \| good	5.356 \| good	26 \| good	0.305 \| good
2026-01-25T06:00:00.000Z	60 \| moderate	13.962 \| fine	62.06 \| fine	4.312 \| good	5.78 \| good	26.497 \| good	0.333 \| good
2026-01-25T07:00:00.000Z	62 \| moderate	14.775 \| fine	65.985 \| fine	4.85 \| good	5.274 \| good	26.229 \| good	0.32 \| good
2026-01-25T08:00:00.000Z	69 \| moderate	19.486 \| fine	85.493 \| fine	3.023 \| good	4.768 \| good	25.96 \| good	0.306 \| good
2026-01-25T09:00:00.000Z	77 \| moderate	23.047 \| fine	100.807 \| fine	3.58 \| good	4.262 \| good	25.691 \| good	0.293 \| good
2026-01-25T10:00:00.000Z	77 \| moderate	23.041 \| fine	100.341 \| fine	5.342 \| good	3.612 \| good	25.531 \| good	0.281 \| good
2026-01-25T11:00:00.000Z	77 \| moderate	22.797 \| fine	99.657 \| fine	6.266 \| good	2.961 \| good	25.371 \| good	0.269 \| good
2026-01-25T12:00:00.000Z	73 \| moderate	20.962 \| fine	92.149 \| fine	2.213 \| good	2.31 \| good	25.211 \| good	0.257 \| good
2026-01-25T13:00:00.000Z	71 \| moderate	19.536 \| fine	85.774 \| fine	3.413 \| good	2.276 \| good	25.177 \| good	0.251 \| good
2026-01-25T14:00:00.000Z	60 \| moderate	14.422 \| fine	64.621 \| fine	1.684 \| good	2.242 \| good	25.143 \| good	0.245 \| good
2026-01-25T15:00:00.000Z	58 \| moderate	12.709 \| fine	57.264 \| fine	1.837 \| good	2.208 \| good	25.108 \| good	0.239 \| good
2026-01-25T16:00:00.000Z	60 \| moderate	14.401 \| fine	64.557 \| fine	8.292 \| good	2.307 \| good	23.722 \| good	0.254 \| good
2026-01-25T17:00:00.000Z	77 \| moderate	23.382 \| fine	101.947 \| fine	13.154 \| good	2.406 \| good	22.335 \| good	0.269 \| good

Westminster

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Westminster, California air quality map: Track AQI near you

1.54ppm

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 06:00:00 on 2026-01-22.

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 03:00:00 on 2026-01-23.

What is the current air quality in Westminster, California?

The current air quality in Westminster, California is 79, 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 23.714 μg/m³.

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

The current PM₁₀ concentration at Westminster, California is 46.71 μg/m³.

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

The current carbon monoxide (CO) concentration at Westminster, California is 1.301 ppm.

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

The current sulfur dioxide (SO₂) concentration at Westminster, California is 0.68 ppb.

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

The current ozone (O₃) concentration at Westminster, California is 3.363 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Westminster, California is 19.779 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-01-21T18:00:00.000Z	84 \| moderate	26.62 \| fine	62.293 \| fine	12.432 \| good	0.455 \| good	22.036 \| good	0.649 \| good
2026-01-21T19:00:00.000Z	79 \| moderate	23.855 \| fine	57.472 \| fine	16.243 \| good	0.575 \| good	24.343 \| good	0.775 \| good
2026-01-21T20:00:00.000Z	75 \| moderate	21.923 \| fine	63.659 \| fine	18.564 \| good	0.645 \| good	23.807 \| good	0.677 \| good
2026-01-21T21:00:00.000Z	84 \| moderate	27.273 \| fine	59.538 \| fine	21.981 \| good	0.402 \| good	24.798 \| good	0.744 \| good
2026-01-21T22:00:00.000Z	77 \| moderate	22.783 \| fine	49.676 \| good	22.527 \| good	0.461 \| good	23.06 \| good	0.742 \| good
2026-01-21T23:00:00.000Z	69 \| moderate	18.856 \| fine	48.053 \| good	24.511 \| good	0.508 \| good	24.769 \| good	0.686 \| good
2026-01-22T00:00:00.000Z	75 \| moderate	22.347 \| fine	48.451 \| good	26.626 \| good	0.597 \| good	20.783 \| good	0.686 \| good
2026-01-22T01:00:00.000Z	84 \| moderate	27.215 \| fine	56.624 \| fine	25.974 \| good	0.4 \| good	24.043 \| good	0.754 \| good
2026-01-22T02:00:00.000Z	88 \| moderate	29.294 \| fine	56.412 \| fine	23.768 \| good	0.38 \| good	24.973 \| good	0.718 \| good
2026-01-22T03:00:00.000Z	92 \| moderate	30.882 \| fine	56.669 \| fine	18.578 \| good	0.409 \| good	29.066 \| good	0.789 \| good
2026-01-22T04:00:00.000Z	92 \| moderate	30.528 \| fine	60.504 \| fine	16.089 \| good	0.477 \| good	28.813 \| good	0.776 \| good
2026-01-22T05:00:00.000Z	97 \| moderate	34.095 \| fine	60.718 \| fine	14.733 \| good	0.769 \| good	28.584 \| good	0.746 \| good
2026-01-22T06:00:00.000Z	102 \| sensitive	35.526 \| moderate	69.825 \| fine	12.034 \| good	0.547 \| good	31.383 \| good	0.871 \| good
2026-01-22T07:00:00.000Z	97 \| moderate	33.928 \| fine	71.198 \| fine	13.659 \| good	0.57 \| good	31.465 \| good	0.933 \| good
2026-01-22T08:00:00.000Z	90 \| moderate	29.546 \| fine	54.376 \| good	9.395 \| good	0.59 \| good	29.846 \| good	0.948 \| good
2026-01-22T09:00:00.000Z	86 \| moderate	27.549 \| fine	55.403 \| fine	5.352 \| good	0.545 \| good	26.394 \| good	0.861 \| good
2026-01-22T10:00:00.000Z	86 \| moderate	28.116 \| fine	63.652 \| fine	5.142 \| good	0.527 \| good	25.645 \| good	0.73 \| good
2026-01-22T11:00:00.000Z	84 \| moderate	26.911 \| fine	65.726 \| fine	8.663 \| good	0.471 \| good	26.359 \| good	0.607 \| good
2026-01-22T12:00:00.000Z	94 \| moderate	32.089 \| fine	76.072 \| fine	4.365 \| good	0.669 \| good	25.982 \| good	0.626 \| good
2026-01-22T13:00:00.000Z	92 \| moderate	30.737 \| fine	60.871 \| fine	6.227 \| good	0.667 \| good	25.982 \| good	0.626 \| good
2026-01-22T14:00:00.000Z	88 \| moderate	28.906 \| fine	60.581 \| fine	4.303 \| good	0.398 \| good	26.059 \| good	0.858 \| good
2026-01-22T15:00:00.000Z	84 \| moderate	27.283 \| fine	65.084 \| fine	5.217 \| good	0.469 \| good	25.249 \| good	0.998 \| good
2026-01-22T16:00:00.000Z	84 \| moderate	26.534 \| fine	49.726 \| good	7.448 \| good	0.558 \| good	27.603 \| good	0.911 \| good
2026-01-22T17:00:00.000Z	90 \| moderate	30.394 \| fine	54.83 \| good	9.76 \| good	0.626 \| good	27.126 \| good	0.779 \| good
2026-01-22T18:00:00.000Z	122 \| sensitive	43.804 \| moderate	81.657 \| fine	12.831 \| good	0.548 \| good	20.629 \| good	0.565 \| good
2026-01-22T19:00:00.000Z	99 \| moderate	34.667 \| fine	52.738 \| good	14.064 \| good	0.454 \| good	23.394 \| good	0.686 \| good
2026-01-22T20:00:00.000Z	92 \| moderate	31.382 \| fine	58.901 \| fine	16.614 \| good	0.454 \| good	22.676 \| good	0.57 \| good
2026-01-22T21:00:00.000Z	84 \| moderate	26.579 \| fine	48.113 \| good	17.361 \| good	0.489 \| good	23.253 \| good	0.555 \| good
2026-01-22T22:00:00.000Z	94 \| moderate	32.342 \| fine	61.069 \| fine	18.239 \| good	0.742 \| good	23.808 \| good	0.541 \| good
2026-01-22T23:00:00.000Z	90 \| moderate	30.169 \| fine	52.593 \| good	17.257 \| good	0.532 \| good	28.659 \| good	0.667 \| good
2026-01-23T00:00:00.000Z	92 \| moderate	31.417 \| fine	50.5 \| good	20.106 \| good	0.288 \| good	26.849 \| good	0.735 \| good
2026-01-23T01:00:00.000Z	67 \| moderate	18.34 \| fine	31.616 \| good	16.692 \| good	0.304 \| good	19.238 \| good	0.532 \| good
2026-01-23T02:00:00.000Z	58 \| moderate	13.068 \| fine	27.74 \| good	16.119 \| good	0.321 \| good	20.465 \| good	0.538 \| good
2026-01-23T03:00:00.000Z	54 \| moderate	10.991 \| good	32.35 \| good	15.608 \| good	0.274 \| good	23.777 \| good	0.539 \| good
2026-01-23T04:00:00.000Z	60 \| moderate	14.315 \| fine	32.566 \| good	17.35 \| good	0.309 \| good	24.347 \| good	0.464 \| good
2026-01-23T05:00:00.000Z	60 \| moderate	13.587 \| fine	33.655 \| good	13.669 \| good	0.55 \| good	27.671 \| good	0.717 \| good
2026-01-23T06:00:00.000Z	60 \| moderate	13.967 \| fine	35.887 \| good	12.163 \| good	0.425 \| good	26.377 \| good	0.715 \| good
2026-01-23T07:00:00.000Z	64 \| moderate	15.999 \| fine	33.068 \| good	11.981 \| good	0.416 \| good	26.377 \| good	0.715 \| good
2026-01-23T08:00:00.000Z	66 \| moderate	17.384 \| fine	40.171 \| good	5.469 \| good	0.634 \| good	25.326 \| good	0.701 \| good
2026-01-23T09:00:00.000Z	58 \| moderate	12.521 \| fine	30.978 \| good	4.775 \| good	0.329 \| good	24.238 \| good	0.836 \| good
2026-01-23T10:00:00.000Z	64 \| moderate	16.081 \| fine	32.505 \| good	8.106 \| good	0.485 \| good	23.019 \| good	0.89 \| good
2026-01-23T11:00:00.000Z	64 \| moderate	15.983 \| fine	30.169 \| good	7.066 \| good	0.411 \| good	22.029 \| good	0.693 \| good
2026-01-23T12:00:00.000Z	73 \| moderate	20.979 \| fine	32.306 \| good	6.172 \| good	0.448 \| good	19.544 \| good	0.568 \| good
2026-01-23T13:00:00.000Z	67 \| moderate	18.368 \| fine	30.217 \| good	4.593 \| good	0.449 \| good	19.544 \| good	0.568 \| good
2026-01-23T14:00:00.000Z	73 \| moderate	21.486 \| fine	37.403 \| good	3.481 \| good	0.248 \| good	20.75 \| good	0.645 \| good
2026-01-23T15:00:00.000Z	77 \| moderate	23.231 \| fine	33.779 \| good	2.928 \| good	0.516 \| good	19.917 \| good	0.949 \| good
2026-01-23T16:00:00.000Z	79 \| moderate	24.257 \| fine	45.548 \| good	3.318 \| good	0.675 \| good	19.644 \| good	1.286 \| good
2026-01-23T17:00:00.000Z	79 \| moderate	23.714 \| fine	46.71 \| good	3.363 \| good	0.68 \| good	19.779 \| good	1.301 \| good
2026-01-23T18:00:00.000Z	66 \| moderate	16.87 \| fine	74.622 \| fine	18.36 \| good	3.989 \| good	16.327 \| good	0.223 \| good
2026-01-23T19:00:00.000Z	60 \| moderate	13.945 \| fine	62.042 \| fine	23.729 \| good	4.357 \| good	15.898 \| good	0.208 \| good
2026-01-23T20:00:00.000Z	62 \| moderate	14.68 \| fine	65.588 \| fine	29.9 \| good	4.724 \| good	15.47 \| good	0.192 \| good
2026-01-23T21:00:00.000Z	58 \| moderate	13.424 \| fine	60.189 \| fine	32.432 \| good	5.092 \| good	15.041 \| good	0.177 \| good
2026-01-23T22:00:00.000Z	49 \| good	9.362 \| good	41.721 \| good	32.506 \| good	5.183 \| good	15.922 \| good	0.175 \| good
2026-01-23T23:00:00.000Z	44 \| good	7.506 \| good	32.93 \| good	32.958 \| good	5.274 \| good	16.802 \| good	0.172 \| good
2026-01-24T00:00:00.000Z	31 \| good	1.509 \| good	6.066 \| good	33.373 \| good	5.365 \| good	17.682 \| good	0.17 \| good
2026-01-24T01:00:00.000Z	31 \| good	4.426 \| good	19.118 \| good	32.743 \| good	5.342 \| good	21.366 \| good	0.196 \| good
2026-01-24T02:00:00.000Z	24 \| good	3.324 \| good	14.367 \| good	26.244 \| good	5.318 \| good	25.049 \| good	0.222 \| good
2026-01-24T03:00:00.000Z	38 \| good	6.885 \| good	30.427 \| good	21.399 \| good	5.295 \| good	28.732 \| good	0.248 \| good
2026-01-24T04:00:00.000Z	56 \| moderate	12.291 \| fine	54.997 \| good	9.154 \| good	5.53 \| good	28.62 \| good	0.251 \| good
2026-01-24T05:00:00.000Z	54 \| moderate	10.764 \| good	47.813 \| good	6.076 \| good	5.765 \| good	28.508 \| good	0.255 \| good
2026-01-24T06:00:00.000Z	44 \| good	8.356 \| good	36.583 \| good	4.804 \| good	6.001 \| good	28.396 \| good	0.258 \| good
2026-01-24T07:00:00.000Z	44 \| good	7.661 \| good	33.913 \| good	7.268 \| good	5.935 \| good	27.004 \| good	0.254 \| good
2026-01-24T08:00:00.000Z	52 \| moderate	9.765 \| good	43.304 \| good	9.047 \| good	5.869 \| good	25.611 \| good	0.25 \| good
2026-01-24T09:00:00.000Z	62 \| moderate	15.102 \| fine	66.961 \| fine	9.908 \| good	5.804 \| good	24.218 \| good	0.247 \| good
2026-01-24T10:00:00.000Z	62 \| moderate	15.127 \| fine	67.702 \| fine	14.29 \| good	5.746 \| good	23.082 \| good	0.238 \| good
2026-01-24T11:00:00.000Z	64 \| moderate	15.563 \| fine	69.758 \| fine	21.324 \| good	5.689 \| good	21.945 \| good	0.229 \| good
2026-01-24T12:00:00.000Z	60 \| moderate	14.035 \| fine	62.921 \| fine	19.313 \| good	5.631 \| good	20.808 \| good	0.221 \| good
2026-01-24T13:00:00.000Z	52 \| moderate	10.187 \| good	45.511 \| good	22.199 \| good	5.666 \| good	20.664 \| good	0.228 \| good
2026-01-24T14:00:00.000Z	56 \| moderate	11.514 \| good	51.659 \| good	20.945 \| good	5.701 \| good	20.521 \| good	0.236 \| good
2026-01-24T15:00:00.000Z	52 \| moderate	9.671 \| good	42.846 \| good	19.887 \| good	5.736 \| good	20.377 \| good	0.244 \| good
2026-01-24T16:00:00.000Z	38 \| good	7.14 \| good	31.595 \| good	21.36 \| good	5.552 \| good	16.972 \| good	0.225 \| good
2026-01-24T17:00:00.000Z	49 \| good	9.245 \| good	41.419 \| good	22.356 \| good	5.369 \| good	13.568 \| good	0.206 \| good
2026-01-24T18:00:00.000Z	44 \| good	7.631 \| good	33.572 \| good	25.177 \| good	5.186 \| good	10.164 \| good	0.188 \| good
2026-01-24T19:00:00.000Z	26 \| good	2.293 \| good	9.625 \| good	28.359 \| good	5.06 \| good	9.556 \| good	0.183 \| good
2026-01-24T20:00:00.000Z	29 \| good	4.243 \| good	18.404 \| good	30.722 \| good	4.934 \| good	8.949 \| good	0.179 \| good
2026-01-24T21:00:00.000Z	29 \| good	4.849 \| good	21.008 \| good	31.357 \| good	4.809 \| good	8.342 \| good	0.174 \| good
2026-01-24T22:00:00.000Z	44 \| good	7.755 \| good	34.197 \| good	31.897 \| good	4.698 \| good	8.735 \| good	0.173 \| good
2026-01-24T23:00:00.000Z	54 \| moderate	11.37 \| good	50.479 \| good	32.377 \| good	4.588 \| good	9.129 \| good	0.172 \| good
2026-01-25T00:00:00.000Z	29 \| good	3.393 \| good	14.156 \| good	30.976 \| good	4.477 \| good	9.523 \| good	0.172 \| good
2026-01-25T01:00:00.000Z	49 \| good	8.886 \| good	39.011 \| good	27.446 \| good	4.487 \| good	14.683 \| good	0.198 \| good
2026-01-25T02:00:00.000Z	52 \| moderate	10.176 \| good	45.036 \| good	23.666 \| good	4.497 \| good	19.844 \| good	0.224 \| good
2026-01-25T03:00:00.000Z	58 \| moderate	13.312 \| fine	59.888 \| fine	16.183 \| good	4.506 \| good	25.005 \| good	0.25 \| good
2026-01-25T04:00:00.000Z	67 \| moderate	18.136 \| fine	80.594 \| fine	8.408 \| good	4.931 \| good	25.502 \| good	0.278 \| good
2026-01-25T05:00:00.000Z	66 \| moderate	16.958 \| fine	74.944 \| fine	4.018 \| good	5.356 \| good	26 \| good	0.305 \| good
2026-01-25T06:00:00.000Z	60 \| moderate	13.962 \| fine	62.06 \| fine	4.312 \| good	5.78 \| good	26.497 \| good	0.333 \| good
2026-01-25T07:00:00.000Z	62 \| moderate	14.775 \| fine	65.985 \| fine	4.85 \| good	5.274 \| good	26.229 \| good	0.32 \| good
2026-01-25T08:00:00.000Z	69 \| moderate	19.486 \| fine	85.493 \| fine	3.023 \| good	4.768 \| good	25.96 \| good	0.306 \| good
2026-01-25T09:00:00.000Z	77 \| moderate	23.047 \| fine	100.807 \| fine	3.58 \| good	4.262 \| good	25.691 \| good	0.293 \| good
2026-01-25T10:00:00.000Z	77 \| moderate	23.041 \| fine	100.341 \| fine	5.342 \| good	3.612 \| good	25.531 \| good	0.281 \| good
2026-01-25T11:00:00.000Z	77 \| moderate	22.797 \| fine	99.657 \| fine	6.266 \| good	2.961 \| good	25.371 \| good	0.269 \| good
2026-01-25T12:00:00.000Z	73 \| moderate	20.962 \| fine	92.149 \| fine	2.213 \| good	2.31 \| good	25.211 \| good	0.257 \| good
2026-01-25T13:00:00.000Z	71 \| moderate	19.536 \| fine	85.774 \| fine	3.413 \| good	2.276 \| good	25.177 \| good	0.251 \| good
2026-01-25T14:00:00.000Z	60 \| moderate	14.422 \| fine	64.621 \| fine	1.684 \| good	2.242 \| good	25.143 \| good	0.245 \| good
2026-01-25T15:00:00.000Z	58 \| moderate	12.709 \| fine	57.264 \| fine	1.837 \| good	2.208 \| good	25.108 \| good	0.239 \| good
2026-01-25T16:00:00.000Z	60 \| moderate	14.401 \| fine	64.557 \| fine	8.292 \| good	2.307 \| good	23.722 \| good	0.254 \| good
2026-01-25T17:00:00.000Z	77 \| moderate	23.382 \| fine	101.947 \| fine	13.154 \| good	2.406 \| good	22.335 \| good	0.269 \| 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

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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?

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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?