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

The current PM10 concentration at Westminster, California is 50.769 μg/m3.

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

The current sulfur dioxide (SO2) concentration at Westminster, California is 1.082 ppb.

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

The current ozone (O3) concentration at Westminster, California is 48.433 ppm.

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

The current nitrogen dioxide (NO2) concentration at Westminster, California is 8.896 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 12.074 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)

12.07 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

50.77 μg/m³

155

255

425

605+

Ozone (O₃)

48.43 ppb

201

201+

Sulfur Dioxide (SO₂)

1.08 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

8.90 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.33 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
2026-07-21T23:00:00.000Z	54 \| moderate	10.864 \| good	51.592 \| good	40.808 \| good	0.616 \| good	7.426 \| good	0.25 \| good
2026-07-22T00:00:00.000Z	49 \| good	8.862 \| good	39.66 \| good	39.434 \| good	0.58 \| good	8.122 \| good	0.244 \| good
2026-07-22T01:00:00.000Z	44 \| good	7.894 \| good	38.151 \| good	36.206 \| good	0.564 \| good	6.663 \| good	0.314 \| good
2026-07-22T02:00:00.000Z	36 \| good	6.191 \| good	38.899 \| good	32.333 \| good	0.587 \| good	7.795 \| good	0.244 \| good
2026-07-22T03:00:00.000Z	30 \| good	5.349 \| good	30.687 \| good	31.746 \| good	0.531 \| good	8.11 \| good	0.314 \| good
2026-07-22T04:00:00.000Z	33 \| good	5.58 \| good	28.764 \| good	28.708 \| good	0.459 \| good	10.038 \| good	0.384 \| good
2026-07-22T05:00:00.000Z	27 \| good	5.011 \| good	24.319 \| good	24.817 \| good	0.663 \| good	10.89 \| good	0.396 \| good
2026-07-22T06:00:00.000Z	22 \| good	3.605 \| good	20.258 \| good	24.023 \| good	0.512 \| good	9.847 \| good	0.523 \| good
2026-07-22T07:00:00.000Z	22 \| good	3.927 \| good	20.96 \| good	23.649 \| good	0.513 \| good	9.847 \| good	0.523 \| good
2026-07-22T08:00:00.000Z	22 \| good	4.38 \| good	21.517 \| good	20.016 \| good	0.476 \| good	9.604 \| good	0.393 \| good
2026-07-22T09:00:00.000Z	22 \| good	4.34 \| good	17.768 \| good	16.803 \| good	0.499 \| good	8.18 \| good	0.254 \| good
2026-07-22T10:00:00.000Z	22 \| good	3.973 \| good	16.408 \| good	14.104 \| good	0.443 \| good	8.449 \| good	0.254 \| good
2026-07-22T11:00:00.000Z	22 \| good	3.783 \| good	16.705 \| good	12.454 \| good	0.565 \| good	7.156 \| good	0.184 \| good
2026-07-22T12:00:00.000Z	22 \| good	4.49 \| good	15.935 \| good	12.657 \| good	0.465 \| good	6.258 \| good	0.258 \| good
2026-07-22T13:00:00.000Z	27 \| good	4.696 \| good	15.544 \| good	12.947 \| good	0.465 \| good	6.258 \| good	0.258 \| good
2026-07-22T14:00:00.000Z	27 \| good	4.956 \| good	23.709 \| good	14.937 \| good	0.465 \| good	7.362 \| good	0.484 \| good
2026-07-22T15:00:00.000Z	42 \| good	6.424 \| good	45.088 \| good	13.889 \| good	0.614 \| good	10.339 \| good	0.411 \| good
2026-07-22T16:00:00.000Z	46 \| good	7.196 \| good	49.7 \| good	17.858 \| good	0.68 \| good	7.917 \| good	0.4 \| good
2026-07-22T17:00:00.000Z	44 \| good	7.324 \| good	47.025 \| good	19.548 \| good	0.717 \| good	7.227 \| good	0.331 \| good
2026-07-22T18:00:00.000Z	51 \| moderate	8.045 \| good	56.456 \| fine	22.704 \| good	0.725 \| good	7.174 \| good	0.331 \| good
2026-07-22T19:00:00.000Z	44 \| good	8.312 \| good	45.341 \| good	26.181 \| good	0.685 \| good	7.83 \| good	0.356 \| good
2026-07-22T20:00:00.000Z	44 \| good	7.519 \| good	40.858 \| good	29.078 \| good	0.786 \| good	8.074 \| good	0.356 \| good
2026-07-22T21:00:00.000Z	68 \| moderate	8.692 \| good	89.315 \| fine	34.238 \| good	0.773 \| good	7.673 \| good	0.331 \| good
2026-07-22T22:00:00.000Z	56 \| moderate	8.541 \| good	65.455 \| fine	36.279 \| good	0.85 \| good	7.205 \| good	0.323 \| good
2026-07-22T23:00:00.000Z	45 \| good	7.06 \| good	49.32 \| good	39.12 \| good	0.641 \| good	7.215 \| good	0.393 \| good
2026-07-23T00:00:00.000Z	43 \| good	6.302 \| good	46.095 \| good	35.372 \| good	0.735 \| good	6.111 \| good	0.323 \| good
2026-07-23T01:00:00.000Z	39 \| good	5.425 \| good	41.863 \| good	33.433 \| good	0.842 \| good	5.496 \| good	0.323 \| good
2026-07-23T02:00:00.000Z	32 \| good	4.769 \| good	34.926 \| good	30.188 \| good	0.841 \| good	6.894 \| good	0.393 \| good
2026-07-23T03:00:00.000Z	52 \| moderate	10.046 \| good	44.301 \| good	19.686 \| good	0.847 \| good	5.6 \| good	0.105 \| good
2026-07-23T04:00:00.000Z	33 \| good	5.776 \| good	31.061 \| good	25.3 \| good	0.704 \| good	8.299 \| good	0.393 \| good
2026-07-23T05:00:00.000Z	33 \| good	6.28 \| good	30.51 \| good	23.019 \| good	0.801 \| good	9.015 \| good	0.393 \| good
2026-07-23T06:00:00.000Z	33 \| good	6.231 \| good	30.851 \| good	20.157 \| good	0.677 \| good	9.071 \| good	0.462 \| good
2026-07-23T07:00:00.000Z	33 \| good	6.223 \| good	28.614 \| good	20.15 \| good	0.665 \| good	9.071 \| good	0.462 \| good
2026-07-23T08:00:00.000Z	44 \| good	5.995 \| good	48.21 \| good	18.624 \| good	0.582 \| good	9.29 \| good	0.4 \| good
2026-07-23T09:00:00.000Z	52 \| moderate	5.668 \| good	57.332 \| fine	18.534 \| good	0.645 \| good	7.674 \| good	0.261 \| good
2026-07-23T10:00:00.000Z	53 \| moderate	6.547 \| good	58.695 \| fine	18.532 \| good	0.59 \| good	6.246 \| good	0.265 \| good
2026-07-23T11:00:00.000Z	33 \| good	5.987 \| good	31.862 \| good	16.939 \| good	0.728 \| good	8.885 \| good	0.261 \| good
2026-07-23T12:00:00.000Z	33 \| good	6.126 \| good	31.711 \| good	17.397 \| good	0.545 \| good	8.849 \| good	0.28 \| good
2026-07-23T13:00:00.000Z	33 \| good	6.356 \| good	28.29 \| good	17.132 \| good	0.547 \| good	8.849 \| good	0.28 \| good
2026-07-23T14:00:00.000Z	54 \| moderate	7.772 \| good	61.463 \| fine	15.157 \| good	0.649 \| good	11.929 \| good	0.518 \| good
2026-07-23T15:00:00.000Z	69 \| moderate	8.826 \| good	92.126 \| fine	18.062 \| good	0.827 \| good	12.248 \| good	0.591 \| good
2026-07-23T16:00:00.000Z	77 \| moderate	12.463 \| fine	107.858 \| fine	18.325 \| good	0.898 \| good	10.308 \| good	0.508 \| good
2026-07-23T17:00:00.000Z	77 \| moderate	17.927 \| fine	107.398 \| fine	26.409 \| good	0.824 \| good	9.37 \| good	0.426 \| good
2026-07-23T18:00:00.000Z	72 \| moderate	13.623 \| fine	97.075 \| fine	30.799 \| good	0.853 \| good	9.633 \| good	0.368 \| good
2026-07-23T19:00:00.000Z	73 \| moderate	15.105 \| fine	98.717 \| fine	36.789 \| good	0.785 \| good	9.074 \| good	0.378 \| good
2026-07-23T20:00:00.000Z	58 \| moderate	13.031 \| fine	67.274 \| fine	39.606 \| good	0.802 \| good	7.49 \| good	0.368 \| good
2026-07-23T21:00:00.000Z	58 \| moderate	12.568 \| fine	70.411 \| fine	45.077 \| good	0.862 \| good	7.256 \| good	0.356 \| good
2026-07-23T22:00:00.000Z	56 \| moderate	12.072 \| good	51.742 \| good	47.914 \| good	1.069 \| good	8.097 \| good	0.336 \| good
2026-07-23T22:00:00.000Z	56 \| moderate	12.074 \| good	50.769 \| good	48.433 \| good	1.082 \| good	8.896 \| good	0.328 \| good
2026-07-23T23:00:00.000Z	58 \| moderate	13.051 \| fine	58.611 \| fine	50.763 \| good	1.133 \| good	3.613 \| good	0.114 \| good
2026-07-24T00:00:00.000Z	58 \| moderate	13.061 \| fine	58.347 \| fine	40.734 \| good	1.116 \| good	3.553 \| good	0.114 \| good
2026-07-24T01:00:00.000Z	54 \| moderate	10.741 \| good	47.619 \| good	35.006 \| good	1.083 \| good	4.134 \| good	0.115 \| good
2026-07-24T02:00:00.000Z	62 \| moderate	14.504 \| fine	64.695 \| fine	28.122 \| good	1.045 \| good	5.444 \| good	0.117 \| good
2026-07-24T03:00:00.000Z	58 \| moderate	13.038 \| fine	58.795 \| fine	27.094 \| good	1 \| good	7.233 \| good	0.117 \| good
2026-07-24T04:00:00.000Z	54 \| moderate	11.036 \| good	48.65 \| good	25.81 \| good	0.981 \| good	8.326 \| good	0.117 \| good
2026-07-24T05:00:00.000Z	52 \| moderate	10.469 \| good	46.23 \| good	26.045 \| good	0.953 \| good	9.064 \| good	0.117 \| good
2026-07-24T06:00:00.000Z	54 \| moderate	10.547 \| good	46.754 \| good	23.236 \| good	0.922 \| good	9.97 \| good	0.118 \| good
2026-07-24T07:00:00.000Z	54 \| moderate	11.5 \| good	50.841 \| good	21.9 \| good	0.882 \| good	11.018 \| good	0.121 \| good
2026-07-24T08:00:00.000Z	58 \| moderate	12.534 \| fine	56.894 \| fine	21.974 \| good	0.825 \| good	10.922 \| good	0.122 \| good
2026-07-24T09:00:00.000Z	54 \| moderate	11.146 \| good	49.301 \| good	23.21 \| good	0.791 \| good	10.996 \| good	0.122 \| good
2026-07-24T10:00:00.000Z	54 \| moderate	10.567 \| good	47.03 \| good	22.112 \| good	0.777 \| good	11.518 \| good	0.124 \| good
2026-07-24T11:00:00.000Z	52 \| moderate	9.948 \| good	44.272 \| good	22.568 \| good	0.778 \| good	12.226 \| good	0.126 \| good
2026-07-24T12:00:00.000Z	54 \| moderate	11.314 \| good	50.278 \| good	22.162 \| good	0.78 \| good	12.742 \| good	0.129 \| good
2026-07-24T13:00:00.000Z	60 \| moderate	14.226 \| fine	63.319 \| fine	17.709 \| good	0.788 \| good	12.813 \| good	0.132 \| good
2026-07-24T14:00:00.000Z	66 \| moderate	17.004 \| fine	75.584 \| fine	18.888 \| good	0.79 \| good	11.008 \| good	0.136 \| good
2026-07-24T15:00:00.000Z	67 \| moderate	17.975 \| fine	79.882 \| fine	22.025 \| good	0.82 \| good	7.606 \| good	0.122 \| good
2026-07-24T16:00:00.000Z	67 \| moderate	18.165 \| fine	80.182 \| fine	26.32 \| good	0.847 \| good	6.386 \| good	0.119 \| good
2026-07-24T17:00:00.000Z	71 \| moderate	19.829 \| fine	87.569 \| fine	33.942 \| good	0.919 \| good	5.786 \| good	0.118 \| good
2026-07-24T18:00:00.000Z	66 \| moderate	17.354 \| fine	77.105 \| fine	39.981 \| good	0.98 \| good	5.322 \| good	0.118 \| good
2026-07-24T19:00:00.000Z	64 \| moderate	16.257 \| fine	72.456 \| fine	39.682 \| good	1.019 \| good	4.727 \| good	0.116 \| good
2026-07-24T20:00:00.000Z	66 \| moderate	17.306 \| fine	76.966 \| fine	40.885 \| good	1.033 \| good	4.105 \| good	0.115 \| good
2026-07-24T21:00:00.000Z	56 \| moderate	11.746 \| good	52.584 \| good	42.837 \| good	1.041 \| good	3.623 \| good	0.112 \| good
2026-07-24T22:00:00.000Z	56 \| moderate	11.69 \| good	52.395 \| good	39.942 \| good	1.044 \| good	3.294 \| good	0.11 \| good
2026-07-24T23:00:00.000Z	49 \| good	9.431 \| good	42.138 \| good	36.988 \| good	1.037 \| good	3.153 \| good	0.109 \| good
2026-07-25T00:00:00.000Z	54 \| moderate	10.534 \| good	46.45 \| good	35.024 \| good	1.029 \| good	3.332 \| good	0.108 \| good
2026-07-25T01:00:00.000Z	52 \| moderate	9.941 \| good	44.183 \| good	31.449 \| good	1.004 \| good	3.782 \| good	0.107 \| good
2026-07-25T02:00:00.000Z	49 \| good	8.957 \| good	39.443 \| good	28.401 \| good	0.974 \| good	4.82 \| good	0.107 \| good
2026-07-25T03:00:00.000Z	49 \| good	8.568 \| good	37.519 \| good	28.587 \| good	0.952 \| good	6.345 \| good	0.108 \| good
2026-07-25T04:00:00.000Z	44 \| good	8.335 \| good	36.761 \| good	27.8 \| good	0.94 \| good	7.395 \| good	0.109 \| good
2026-07-25T05:00:00.000Z	44 \| good	8.371 \| good	36.828 \| good	26.378 \| good	0.927 \| good	8.119 \| good	0.109 \| good
2026-07-25T06:00:00.000Z	44 \| good	8.417 \| good	37.208 \| good	25.841 \| good	0.913 \| good	9.23 \| good	0.112 \| good
2026-07-25T07:00:00.000Z	49 \| good	8.971 \| good	39.162 \| good	23.402 \| good	0.888 \| good	10.291 \| good	0.115 \| good
2026-07-25T08:00:00.000Z	49 \| good	9.327 \| good	41.131 \| good	21.422 \| good	0.858 \| good	10.72 \| good	0.118 \| good
2026-07-25T09:00:00.000Z	44 \| good	8.317 \| good	36.758 \| good	21.668 \| good	0.855 \| good	11.623 \| good	0.121 \| good
2026-07-25T10:00:00.000Z	44 \| good	8.145 \| good	36.03 \| good	23.323 \| good	0.859 \| good	12.431 \| good	0.124 \| good
2026-07-25T11:00:00.000Z	44 \| good	8.133 \| good	35.969 \| good	23.412 \| good	0.854 \| good	13.336 \| good	0.127 \| good
2026-07-25T12:00:00.000Z	52 \| moderate	10.329 \| good	45.875 \| good	22.265 \| good	0.849 \| good	15.049 \| good	0.133 \| good
2026-07-25T13:00:00.000Z	56 \| moderate	11.607 \| good	51.755 \| good	20.262 \| good	0.856 \| good	15.814 \| good	0.141 \| good
2026-07-25T14:00:00.000Z	66 \| moderate	17.037 \| fine	75.535 \| fine	17.185 \| good	0.888 \| good	13.705 \| good	0.149 \| good
2026-07-25T15:00:00.000Z	66 \| moderate	16.603 \| fine	73.319 \| fine	19.034 \| good	0.963 \| good	9.352 \| good	0.127 \| good
2026-07-25T16:00:00.000Z	67 \| moderate	17.804 \| fine	79.256 \| fine	25.835 \| good	1.039 \| good	7.62 \| good	0.121 \| good
2026-07-25T17:00:00.000Z	77 \| moderate	22.984 \| fine	100.707 \| fine	38.603 \| good	1.126 \| good	6.806 \| good	0.119 \| good
2026-07-25T18:00:00.000Z	82 \| moderate	25.748 \| fine	112.084 \| fine	45.633 \| good	1.172 \| good	6.107 \| good	0.118 \| good
2026-07-25T19:00:00.000Z	69 \| moderate	19.266 \| fine	84.655 \| fine	45.7 \| good	1.184 \| good	5.283 \| good	0.116 \| good
2026-07-25T20:00:00.000Z	67 \| moderate	17.85 \| fine	79.081 \| fine	47.817 \| good	1.192 \| good	4.527 \| good	0.114 \| good
2026-07-25T21:00:00.000Z	60 \| moderate	14.084 \| fine	62.858 \| fine	50.843 \| good	1.21 \| good	3.94 \| good	0.113 \| good
2026-07-25T22:00:00.000Z	56 \| moderate	12.027 \| good	53.159 \| good	50.134 \| good	1.24 \| good	3.45 \| good	0.111 \| good

Westminster

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Westminster, California air quality map: Track AQI near you

0.29ppm

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 05:00:00 on 2026-07-23.

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 2026-07-23.

What is the current air quality in Westminster, California?

The current air quality in Westminster, California is 56, 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 12.074 μg/m³.

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

The current PM₁₀ concentration at Westminster, California is 50.769 μg/m³.

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

The current carbon monoxide (CO) concentration at Westminster, California is 0.328 ppm.

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

The current sulfur dioxide (SO₂) concentration at Westminster, California is 1.082 ppb.

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

The current ozone (O₃) concentration at Westminster, California is 48.433 ppm.

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

The current nitrogen dioxide (NO₂) concentration at Westminster, California is 8.896 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T23:00:00.000Z	54 \| moderate	10.864 \| good	51.592 \| good	40.808 \| good	0.616 \| good	7.426 \| good	0.25 \| good
2026-07-22T00:00:00.000Z	49 \| good	8.862 \| good	39.66 \| good	39.434 \| good	0.58 \| good	8.122 \| good	0.244 \| good
2026-07-22T01:00:00.000Z	44 \| good	7.894 \| good	38.151 \| good	36.206 \| good	0.564 \| good	6.663 \| good	0.314 \| good
2026-07-22T02:00:00.000Z	36 \| good	6.191 \| good	38.899 \| good	32.333 \| good	0.587 \| good	7.795 \| good	0.244 \| good
2026-07-22T03:00:00.000Z	30 \| good	5.349 \| good	30.687 \| good	31.746 \| good	0.531 \| good	8.11 \| good	0.314 \| good
2026-07-22T04:00:00.000Z	33 \| good	5.58 \| good	28.764 \| good	28.708 \| good	0.459 \| good	10.038 \| good	0.384 \| good
2026-07-22T05:00:00.000Z	27 \| good	5.011 \| good	24.319 \| good	24.817 \| good	0.663 \| good	10.89 \| good	0.396 \| good
2026-07-22T06:00:00.000Z	22 \| good	3.605 \| good	20.258 \| good	24.023 \| good	0.512 \| good	9.847 \| good	0.523 \| good
2026-07-22T07:00:00.000Z	22 \| good	3.927 \| good	20.96 \| good	23.649 \| good	0.513 \| good	9.847 \| good	0.523 \| good
2026-07-22T08:00:00.000Z	22 \| good	4.38 \| good	21.517 \| good	20.016 \| good	0.476 \| good	9.604 \| good	0.393 \| good
2026-07-22T09:00:00.000Z	22 \| good	4.34 \| good	17.768 \| good	16.803 \| good	0.499 \| good	8.18 \| good	0.254 \| good
2026-07-22T10:00:00.000Z	22 \| good	3.973 \| good	16.408 \| good	14.104 \| good	0.443 \| good	8.449 \| good	0.254 \| good
2026-07-22T11:00:00.000Z	22 \| good	3.783 \| good	16.705 \| good	12.454 \| good	0.565 \| good	7.156 \| good	0.184 \| good
2026-07-22T12:00:00.000Z	22 \| good	4.49 \| good	15.935 \| good	12.657 \| good	0.465 \| good	6.258 \| good	0.258 \| good
2026-07-22T13:00:00.000Z	27 \| good	4.696 \| good	15.544 \| good	12.947 \| good	0.465 \| good	6.258 \| good	0.258 \| good
2026-07-22T14:00:00.000Z	27 \| good	4.956 \| good	23.709 \| good	14.937 \| good	0.465 \| good	7.362 \| good	0.484 \| good
2026-07-22T15:00:00.000Z	42 \| good	6.424 \| good	45.088 \| good	13.889 \| good	0.614 \| good	10.339 \| good	0.411 \| good
2026-07-22T16:00:00.000Z	46 \| good	7.196 \| good	49.7 \| good	17.858 \| good	0.68 \| good	7.917 \| good	0.4 \| good
2026-07-22T17:00:00.000Z	44 \| good	7.324 \| good	47.025 \| good	19.548 \| good	0.717 \| good	7.227 \| good	0.331 \| good
2026-07-22T18:00:00.000Z	51 \| moderate	8.045 \| good	56.456 \| fine	22.704 \| good	0.725 \| good	7.174 \| good	0.331 \| good
2026-07-22T19:00:00.000Z	44 \| good	8.312 \| good	45.341 \| good	26.181 \| good	0.685 \| good	7.83 \| good	0.356 \| good
2026-07-22T20:00:00.000Z	44 \| good	7.519 \| good	40.858 \| good	29.078 \| good	0.786 \| good	8.074 \| good	0.356 \| good
2026-07-22T21:00:00.000Z	68 \| moderate	8.692 \| good	89.315 \| fine	34.238 \| good	0.773 \| good	7.673 \| good	0.331 \| good
2026-07-22T22:00:00.000Z	56 \| moderate	8.541 \| good	65.455 \| fine	36.279 \| good	0.85 \| good	7.205 \| good	0.323 \| good
2026-07-22T23:00:00.000Z	45 \| good	7.06 \| good	49.32 \| good	39.12 \| good	0.641 \| good	7.215 \| good	0.393 \| good
2026-07-23T00:00:00.000Z	43 \| good	6.302 \| good	46.095 \| good	35.372 \| good	0.735 \| good	6.111 \| good	0.323 \| good
2026-07-23T01:00:00.000Z	39 \| good	5.425 \| good	41.863 \| good	33.433 \| good	0.842 \| good	5.496 \| good	0.323 \| good
2026-07-23T02:00:00.000Z	32 \| good	4.769 \| good	34.926 \| good	30.188 \| good	0.841 \| good	6.894 \| good	0.393 \| good
2026-07-23T03:00:00.000Z	52 \| moderate	10.046 \| good	44.301 \| good	19.686 \| good	0.847 \| good	5.6 \| good	0.105 \| good
2026-07-23T04:00:00.000Z	33 \| good	5.776 \| good	31.061 \| good	25.3 \| good	0.704 \| good	8.299 \| good	0.393 \| good
2026-07-23T05:00:00.000Z	33 \| good	6.28 \| good	30.51 \| good	23.019 \| good	0.801 \| good	9.015 \| good	0.393 \| good
2026-07-23T06:00:00.000Z	33 \| good	6.231 \| good	30.851 \| good	20.157 \| good	0.677 \| good	9.071 \| good	0.462 \| good
2026-07-23T07:00:00.000Z	33 \| good	6.223 \| good	28.614 \| good	20.15 \| good	0.665 \| good	9.071 \| good	0.462 \| good
2026-07-23T08:00:00.000Z	44 \| good	5.995 \| good	48.21 \| good	18.624 \| good	0.582 \| good	9.29 \| good	0.4 \| good
2026-07-23T09:00:00.000Z	52 \| moderate	5.668 \| good	57.332 \| fine	18.534 \| good	0.645 \| good	7.674 \| good	0.261 \| good
2026-07-23T10:00:00.000Z	53 \| moderate	6.547 \| good	58.695 \| fine	18.532 \| good	0.59 \| good	6.246 \| good	0.265 \| good
2026-07-23T11:00:00.000Z	33 \| good	5.987 \| good	31.862 \| good	16.939 \| good	0.728 \| good	8.885 \| good	0.261 \| good
2026-07-23T12:00:00.000Z	33 \| good	6.126 \| good	31.711 \| good	17.397 \| good	0.545 \| good	8.849 \| good	0.28 \| good
2026-07-23T13:00:00.000Z	33 \| good	6.356 \| good	28.29 \| good	17.132 \| good	0.547 \| good	8.849 \| good	0.28 \| good
2026-07-23T14:00:00.000Z	54 \| moderate	7.772 \| good	61.463 \| fine	15.157 \| good	0.649 \| good	11.929 \| good	0.518 \| good
2026-07-23T15:00:00.000Z	69 \| moderate	8.826 \| good	92.126 \| fine	18.062 \| good	0.827 \| good	12.248 \| good	0.591 \| good
2026-07-23T16:00:00.000Z	77 \| moderate	12.463 \| fine	107.858 \| fine	18.325 \| good	0.898 \| good	10.308 \| good	0.508 \| good
2026-07-23T17:00:00.000Z	77 \| moderate	17.927 \| fine	107.398 \| fine	26.409 \| good	0.824 \| good	9.37 \| good	0.426 \| good
2026-07-23T18:00:00.000Z	72 \| moderate	13.623 \| fine	97.075 \| fine	30.799 \| good	0.853 \| good	9.633 \| good	0.368 \| good
2026-07-23T19:00:00.000Z	73 \| moderate	15.105 \| fine	98.717 \| fine	36.789 \| good	0.785 \| good	9.074 \| good	0.378 \| good
2026-07-23T20:00:00.000Z	58 \| moderate	13.031 \| fine	67.274 \| fine	39.606 \| good	0.802 \| good	7.49 \| good	0.368 \| good
2026-07-23T21:00:00.000Z	58 \| moderate	12.568 \| fine	70.411 \| fine	45.077 \| good	0.862 \| good	7.256 \| good	0.356 \| good
2026-07-23T22:00:00.000Z	56 \| moderate	12.072 \| good	51.742 \| good	47.914 \| good	1.069 \| good	8.097 \| good	0.336 \| good
2026-07-23T22:00:00.000Z	56 \| moderate	12.074 \| good	50.769 \| good	48.433 \| good	1.082 \| good	8.896 \| good	0.328 \| good
2026-07-23T23:00:00.000Z	58 \| moderate	13.051 \| fine	58.611 \| fine	50.763 \| good	1.133 \| good	3.613 \| good	0.114 \| good
2026-07-24T00:00:00.000Z	58 \| moderate	13.061 \| fine	58.347 \| fine	40.734 \| good	1.116 \| good	3.553 \| good	0.114 \| good
2026-07-24T01:00:00.000Z	54 \| moderate	10.741 \| good	47.619 \| good	35.006 \| good	1.083 \| good	4.134 \| good	0.115 \| good
2026-07-24T02:00:00.000Z	62 \| moderate	14.504 \| fine	64.695 \| fine	28.122 \| good	1.045 \| good	5.444 \| good	0.117 \| good
2026-07-24T03:00:00.000Z	58 \| moderate	13.038 \| fine	58.795 \| fine	27.094 \| good	1 \| good	7.233 \| good	0.117 \| good
2026-07-24T04:00:00.000Z	54 \| moderate	11.036 \| good	48.65 \| good	25.81 \| good	0.981 \| good	8.326 \| good	0.117 \| good
2026-07-24T05:00:00.000Z	52 \| moderate	10.469 \| good	46.23 \| good	26.045 \| good	0.953 \| good	9.064 \| good	0.117 \| good
2026-07-24T06:00:00.000Z	54 \| moderate	10.547 \| good	46.754 \| good	23.236 \| good	0.922 \| good	9.97 \| good	0.118 \| good
2026-07-24T07:00:00.000Z	54 \| moderate	11.5 \| good	50.841 \| good	21.9 \| good	0.882 \| good	11.018 \| good	0.121 \| good
2026-07-24T08:00:00.000Z	58 \| moderate	12.534 \| fine	56.894 \| fine	21.974 \| good	0.825 \| good	10.922 \| good	0.122 \| good
2026-07-24T09:00:00.000Z	54 \| moderate	11.146 \| good	49.301 \| good	23.21 \| good	0.791 \| good	10.996 \| good	0.122 \| good
2026-07-24T10:00:00.000Z	54 \| moderate	10.567 \| good	47.03 \| good	22.112 \| good	0.777 \| good	11.518 \| good	0.124 \| good
2026-07-24T11:00:00.000Z	52 \| moderate	9.948 \| good	44.272 \| good	22.568 \| good	0.778 \| good	12.226 \| good	0.126 \| good
2026-07-24T12:00:00.000Z	54 \| moderate	11.314 \| good	50.278 \| good	22.162 \| good	0.78 \| good	12.742 \| good	0.129 \| good
2026-07-24T13:00:00.000Z	60 \| moderate	14.226 \| fine	63.319 \| fine	17.709 \| good	0.788 \| good	12.813 \| good	0.132 \| good
2026-07-24T14:00:00.000Z	66 \| moderate	17.004 \| fine	75.584 \| fine	18.888 \| good	0.79 \| good	11.008 \| good	0.136 \| good
2026-07-24T15:00:00.000Z	67 \| moderate	17.975 \| fine	79.882 \| fine	22.025 \| good	0.82 \| good	7.606 \| good	0.122 \| good
2026-07-24T16:00:00.000Z	67 \| moderate	18.165 \| fine	80.182 \| fine	26.32 \| good	0.847 \| good	6.386 \| good	0.119 \| good
2026-07-24T17:00:00.000Z	71 \| moderate	19.829 \| fine	87.569 \| fine	33.942 \| good	0.919 \| good	5.786 \| good	0.118 \| good
2026-07-24T18:00:00.000Z	66 \| moderate	17.354 \| fine	77.105 \| fine	39.981 \| good	0.98 \| good	5.322 \| good	0.118 \| good
2026-07-24T19:00:00.000Z	64 \| moderate	16.257 \| fine	72.456 \| fine	39.682 \| good	1.019 \| good	4.727 \| good	0.116 \| good
2026-07-24T20:00:00.000Z	66 \| moderate	17.306 \| fine	76.966 \| fine	40.885 \| good	1.033 \| good	4.105 \| good	0.115 \| good
2026-07-24T21:00:00.000Z	56 \| moderate	11.746 \| good	52.584 \| good	42.837 \| good	1.041 \| good	3.623 \| good	0.112 \| good
2026-07-24T22:00:00.000Z	56 \| moderate	11.69 \| good	52.395 \| good	39.942 \| good	1.044 \| good	3.294 \| good	0.11 \| good
2026-07-24T23:00:00.000Z	49 \| good	9.431 \| good	42.138 \| good	36.988 \| good	1.037 \| good	3.153 \| good	0.109 \| good
2026-07-25T00:00:00.000Z	54 \| moderate	10.534 \| good	46.45 \| good	35.024 \| good	1.029 \| good	3.332 \| good	0.108 \| good
2026-07-25T01:00:00.000Z	52 \| moderate	9.941 \| good	44.183 \| good	31.449 \| good	1.004 \| good	3.782 \| good	0.107 \| good
2026-07-25T02:00:00.000Z	49 \| good	8.957 \| good	39.443 \| good	28.401 \| good	0.974 \| good	4.82 \| good	0.107 \| good
2026-07-25T03:00:00.000Z	49 \| good	8.568 \| good	37.519 \| good	28.587 \| good	0.952 \| good	6.345 \| good	0.108 \| good
2026-07-25T04:00:00.000Z	44 \| good	8.335 \| good	36.761 \| good	27.8 \| good	0.94 \| good	7.395 \| good	0.109 \| good
2026-07-25T05:00:00.000Z	44 \| good	8.371 \| good	36.828 \| good	26.378 \| good	0.927 \| good	8.119 \| good	0.109 \| good
2026-07-25T06:00:00.000Z	44 \| good	8.417 \| good	37.208 \| good	25.841 \| good	0.913 \| good	9.23 \| good	0.112 \| good
2026-07-25T07:00:00.000Z	49 \| good	8.971 \| good	39.162 \| good	23.402 \| good	0.888 \| good	10.291 \| good	0.115 \| good
2026-07-25T08:00:00.000Z	49 \| good	9.327 \| good	41.131 \| good	21.422 \| good	0.858 \| good	10.72 \| good	0.118 \| good
2026-07-25T09:00:00.000Z	44 \| good	8.317 \| good	36.758 \| good	21.668 \| good	0.855 \| good	11.623 \| good	0.121 \| good
2026-07-25T10:00:00.000Z	44 \| good	8.145 \| good	36.03 \| good	23.323 \| good	0.859 \| good	12.431 \| good	0.124 \| good
2026-07-25T11:00:00.000Z	44 \| good	8.133 \| good	35.969 \| good	23.412 \| good	0.854 \| good	13.336 \| good	0.127 \| good
2026-07-25T12:00:00.000Z	52 \| moderate	10.329 \| good	45.875 \| good	22.265 \| good	0.849 \| good	15.049 \| good	0.133 \| good
2026-07-25T13:00:00.000Z	56 \| moderate	11.607 \| good	51.755 \| good	20.262 \| good	0.856 \| good	15.814 \| good	0.141 \| good
2026-07-25T14:00:00.000Z	66 \| moderate	17.037 \| fine	75.535 \| fine	17.185 \| good	0.888 \| good	13.705 \| good	0.149 \| good
2026-07-25T15:00:00.000Z	66 \| moderate	16.603 \| fine	73.319 \| fine	19.034 \| good	0.963 \| good	9.352 \| good	0.127 \| good
2026-07-25T16:00:00.000Z	67 \| moderate	17.804 \| fine	79.256 \| fine	25.835 \| good	1.039 \| good	7.62 \| good	0.121 \| good
2026-07-25T17:00:00.000Z	77 \| moderate	22.984 \| fine	100.707 \| fine	38.603 \| good	1.126 \| good	6.806 \| good	0.119 \| good
2026-07-25T18:00:00.000Z	82 \| moderate	25.748 \| fine	112.084 \| fine	45.633 \| good	1.172 \| good	6.107 \| good	0.118 \| good
2026-07-25T19:00:00.000Z	69 \| moderate	19.266 \| fine	84.655 \| fine	45.7 \| good	1.184 \| good	5.283 \| good	0.116 \| good
2026-07-25T20:00:00.000Z	67 \| moderate	17.85 \| fine	79.081 \| fine	47.817 \| good	1.192 \| good	4.527 \| good	0.114 \| good
2026-07-25T21:00:00.000Z	60 \| moderate	14.084 \| fine	62.858 \| fine	50.843 \| good	1.21 \| good	3.94 \| good	0.113 \| good
2026-07-25T22:00:00.000Z	56 \| moderate	12.027 \| good	53.159 \| good	50.134 \| good	1.24 \| good	3.45 \| good	0.111 \| 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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Air quality in nearby cities

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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?