What is the sulfur dioxide (SO2) level in Costa Mesa, California at the moment?

Currently, Costa Mesa, California has a sulfur dioxide (SO2) concentration of 0.592 ppb.

What is the ozone (O3) level in Costa Mesa, California at the moment?

The current ozone (O3) level in Costa Mesa, California at the moment is 4.375 ppm.

What is the nitrogen dioxide (NO2) level in Costa Mesa, California at the moment?

Nitrogen dioxide (NO2) level in Costa Mesa, California at the moment is 11.068 ppb.

Live air quality index in Costa Mesa, California today

Q: What is the PM2.5 level in Costa Mesa, California at the moment?

PM2.5 levels in Costa Mesa, California are currently 14.982 μg/m3.

Q: What is the PM10 level in Costa Mesa, California at the moment?

The PM10 concentration in Costa Mesa, California is 20.004 μg/m3 at the moment.

Stay updated with real-time air quality in Costa Mesa, 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

Costa Mesa, California

Last updated: ... (Local time)

Major air pollutants in Costa Mesa, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

14.98 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

20.00 μg/m³

155

255

425

605+

Ozone (O₃)

4.38 ppb

201

201+

Sulfur Dioxide (SO₂)

0.59 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.07 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.46 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Costa Mesa, California

Get Live Pollen Counts

Costa Mesa, California

Scroll To Air Quality Map

Track live Costa Mesa, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-05T12:00:00.000Z	44 \| good	7.847 \| good	26.619 \| good	18.432 \| good	0.434 \| good	13.946 \| good	0.387 \| good
2026-09-05T13:00:00.000Z	38 \| good	7.343 \| good	17.2 \| good	24.53 \| good	0.432 \| good	12.994 \| good	0.387 \| good
2026-09-05T14:00:00.000Z	52 \| moderate	10.244 \| good	28.624 \| good	18.682 \| good	0.482 \| good	14.654 \| good	0.541 \| good
2026-09-05T15:00:00.000Z	38 \| good	6.982 \| good	19.204 \| good	20.604 \| good	0.709 \| good	20.189 \| good	0.536 \| good
2026-09-05T16:00:00.000Z	64 \| moderate	11.291 \| good	81.055 \| fine	19.66 \| good	0.639 \| good	19.914 \| good	0.537 \| good
2026-09-05T17:00:00.000Z	44 \| good	7.772 \| good	41.678 \| good	23.468 \| good	0.576 \| good	10.185 \| good	0.455 \| good
2026-09-05T18:00:00.000Z	52 \| moderate	9.555 \| good	53.838 \| good	30.647 \| good	0.57 \| good	11.748 \| good	0.495 \| good
2026-09-05T19:00:00.000Z	40 \| good	6.535 \| good	26.484 \| good	43.095 \| good	0.587 \| good	8.365 \| good	0.425 \| good
2026-09-05T20:00:00.000Z	41 \| good	6.035 \| good	21.711 \| good	44.002 \| good	0.559 \| good	6.9 \| good	0.399 \| good
2026-09-05T21:00:00.000Z	40 \| good	4.787 \| good	24.376 \| good	42.801 \| good	0.498 \| good	6.175 \| good	0.452 \| good
2026-09-05T22:00:00.000Z	45 \| good	3.054 \| good	21.231 \| good	49.009 \| good	0.456 \| good	5.404 \| good	0.399 \| good
2026-09-05T23:00:00.000Z	44 \| good	3.352 \| good	25.643 \| good	48.031 \| good	0.642 \| good	5.775 \| good	0.412 \| good
2026-09-06T00:00:00.000Z	40 \| good	4.135 \| good	25.516 \| good	42.559 \| good	0.71 \| good	8.295 \| good	0.372 \| good
2026-09-06T01:00:00.000Z	36 \| good	4.371 \| good	19.083 \| good	39.216 \| good	0.713 \| good	7.631 \| good	0.464 \| good
2026-09-06T02:00:00.000Z	36 \| good	4.047 \| good	14.44 \| good	39.357 \| good	0.667 \| good	9.638 \| good	0.517 \| good
2026-09-06T03:00:00.000Z	38 \| good	6.576 \| good	29.362 \| good	24.254 \| good	0.752 \| good	6.261 \| good	0.139 \| good
2026-09-06T04:00:00.000Z	38 \| good	7.275 \| good	25.467 \| good	36.974 \| good	0.552 \| good	7.792 \| good	0.623 \| good
2026-09-06T05:00:00.000Z	38 \| good	7.46 \| good	24.984 \| good	33.92 \| good	0.785 \| good	9.223 \| good	0.666 \| good
2026-09-06T06:00:00.000Z	49 \| good	8.608 \| good	26.24 \| good	30.578 \| good	0.585 \| good	12.488 \| good	0.679 \| good
2026-09-06T07:00:00.000Z	44 \| good	8.053 \| good	24.228 \| good	29.31 \| good	0.57 \| good	14.241 \| good	0.682 \| good
2026-09-06T08:00:00.000Z	49 \| good	9.298 \| good	40.017 \| good	19.755 \| good	0.573 \| good	16.54 \| good	0.707 \| good
2026-09-06T09:00:00.000Z	49 \| good	9.264 \| good	30.117 \| good	13.693 \| good	0.691 \| good	18.757 \| good	0.541 \| good
2026-09-06T10:00:00.000Z	44 \| good	7.796 \| good	26.617 \| good	19.878 \| good	0.693 \| good	15.636 \| good	0.541 \| good
2026-09-06T11:00:00.000Z	38 \| good	7.444 \| good	19.427 \| good	19.652 \| good	0.694 \| good	12.351 \| good	0.541 \| good
2026-09-06T12:00:00.000Z	38 \| good	7.284 \| good	19.222 \| good	11.698 \| good	0.527 \| good	7.647 \| good	0.568 \| good
2026-09-06T13:00:00.000Z	33 \| good	5.504 \| good	14.325 \| good	13.493 \| good	0.529 \| good	2.916 \| good	0.568 \| good
2026-09-06T14:00:00.000Z	44 \| good	7.971 \| good	16.564 \| good	19.767 \| good	0.512 \| good	5.213 \| good	0.49 \| good
2026-09-06T15:00:00.000Z	52 \| moderate	9.593 \| good	48.553 \| good	16.121 \| good	0.53 \| good	11.596 \| good	0.416 \| good
2026-09-06T16:00:00.000Z	49 \| good	9.355 \| good	24.951 \| good	17.703 \| good	0.484 \| good	16.219 \| good	0.407 \| good
2026-09-06T17:00:00.000Z	49 \| good	8.861 \| good	23.194 \| good	18.176 \| good	0.537 \| good	18.206 \| good	0.473 \| good
2026-09-06T18:00:00.000Z	52 \| moderate	10.374 \| good	31.483 \| good	20.983 \| good	0.484 \| good	12.252 \| good	0.469 \| good
2026-09-06T19:00:00.000Z	49 \| good	9.031 \| good	23.333 \| good	18.879 \| good	0.452 \| good	9.549 \| good	0.346 \| good
2026-09-06T20:00:00.000Z	44 \| good	8.186 \| good	31.237 \| good	18.893 \| good	0.425 \| good	8.587 \| good	0.349 \| good
2026-09-06T21:00:00.000Z	33 \| good	5.978 \| good	12.723 \| good	18.472 \| good	0.442 \| good	9.319 \| good	0.306 \| good
2026-09-06T22:00:00.000Z	33 \| good	6.426 \| good	13.255 \| good	17.16 \| good	0.414 \| good	8.033 \| good	0.306 \| good
2026-09-06T23:00:00.000Z	44 \| good	8.352 \| good	34.407 \| good	18.389 \| good	0.435 \| good	8.991 \| good	0.337 \| good
2026-09-07T00:00:00.000Z	44 \| good	7.539 \| good	23.786 \| good	18.267 \| good	0.454 \| good	10.731 \| good	0.373 \| good
2026-09-07T01:00:00.000Z	49 \| good	8.736 \| good	27.944 \| good	16.107 \| good	0.451 \| good	7.953 \| good	0.398 \| good
2026-09-07T02:00:00.000Z	38 \| good	7.086 \| good	14.073 \| good	11.467 \| good	0.383 \| good	7.654 \| good	0.433 \| good
2026-09-07T03:00:00.000Z	52 \| moderate	9.874 \| good	43.854 \| good	20.004 \| good	0.858 \| good	25.979 \| good	0.199 \| good
2026-09-07T04:00:00.000Z	60 \| moderate	14.423 \| fine	40.95 \| good	10.36 \| good	0.422 \| good	13.03 \| good	0.551 \| good
2026-09-07T05:00:00.000Z	49 \| good	8.765 \| good	29.311 \| good	4.248 \| good	0.639 \| good	14.838 \| good	0.682 \| good
2026-09-07T06:00:00.000Z	49 \| good	9.087 \| good	37.539 \| good	4.848 \| good	0.507 \| good	13.887 \| good	0.697 \| good
2026-09-07T07:00:00.000Z	52 \| moderate	10.408 \| good	44.589 \| good	6.169 \| good	0.511 \| good	13.953 \| good	0.69 \| good
2026-09-07T08:00:00.000Z	60 \| moderate	14.299 \| fine	52.048 \| good	6.952 \| good	0.575 \| good	12.695 \| good	0.605 \| good
2026-09-07T09:00:00.000Z	54 \| moderate	10.865 \| good	29.308 \| good	5.722 \| good	0.632 \| good	11.935 \| good	0.58 \| good
2026-09-07T10:00:00.000Z	62 \| moderate	14.982 \| fine	20.004 \| good	4.375 \| good	0.592 \| good	11.068 \| good	0.463 \| good
2026-09-07T11:00:00.000Z	49 \| good	8.746 \| good	25.863 \| good	5.736 \| good	0.756 \| good	11.438 \| good	0.429 \| good
2026-09-07T11:00:00.000Z	62 \| moderate	14.982 \| fine	20.004 \| good	4.375 \| good	0.592 \| good	11.068 \| good	0.463 \| good
2026-09-07T12:00:00.000Z	56 \| moderate	11.793 \| good	52.116 \| good	5.406 \| good	0.534 \| good	23.462 \| good	0.215 \| good
2026-09-07T13:00:00.000Z	58 \| moderate	12.769 \| fine	57.65 \| fine	3.138 \| good	0.516 \| good	23.132 \| good	0.213 \| good
2026-09-07T14:00:00.000Z	66 \| moderate	16.501 \| fine	73.421 \| fine	4.963 \| good	0.519 \| good	20.365 \| good	0.214 \| good
2026-09-07T15:00:00.000Z	64 \| moderate	16.253 \| fine	71.794 \| fine	10.317 \| good	0.569 \| good	16.77 \| good	0.221 \| good
2026-09-07T16:00:00.000Z	64 \| moderate	15.693 \| fine	69.73 \| fine	17.874 \| good	0.632 \| good	15.479 \| good	0.216 \| good
2026-09-07T17:00:00.000Z	66 \| moderate	16.995 \| fine	75.421 \| fine	28.285 \| good	0.749 \| good	13.296 \| good	0.193 \| good
2026-09-07T18:00:00.000Z	54 \| moderate	10.954 \| good	48.493 \| good	38.54 \| good	0.783 \| good	12.063 \| good	0.189 \| good
2026-09-07T19:00:00.000Z	58 \| moderate	12.504 \| fine	56.061 \| fine	48.918 \| good	0.79 \| good	11.388 \| good	0.189 \| good
2026-09-07T20:00:00.000Z	54 \| moderate	10.28 \| good	45.621 \| good	56.257 \| fine	0.801 \| good	10.19 \| good	0.183 \| good
2026-09-07T21:00:00.000Z	58 \| moderate	10.801 \| good	48.11 \| good	56.724 \| fine	0.838 \| good	8.564 \| good	0.171 \| good
2026-09-07T22:00:00.000Z	44 \| good	7.164 \| good	31.557 \| good	48.228 \| good	0.829 \| good	6.937 \| good	0.159 \| good
2026-09-07T23:00:00.000Z	36 \| good	5.348 \| good	23.146 \| good	38.866 \| good	0.871 \| good	5.877 \| good	0.15 \| good
2026-09-08T00:00:00.000Z	30 \| good	4.583 \| good	20.001 \| good	31.795 \| good	0.911 \| good	5.888 \| good	0.147 \| good
2026-09-08T01:00:00.000Z	23 \| good	3.665 \| good	15.803 \| good	24.786 \| good	0.991 \| good	7.543 \| good	0.15 \| good
2026-09-08T02:00:00.000Z	22 \| good	3.817 \| good	16.401 \| good	19.557 \| good	1.053 \| good	10.819 \| good	0.159 \| good
2026-09-08T03:00:00.000Z	27 \| good	4.701 \| good	20.487 \| good	20.478 \| good	1.12 \| good	14.973 \| good	0.172 \| good
2026-09-08T04:00:00.000Z	22 \| good	4.221 \| good	18.557 \| good	18.76 \| good	1.184 \| good	18.555 \| good	0.184 \| good
2026-09-08T05:00:00.000Z	22 \| good	3.962 \| good	17.301 \| good	17.099 \| good	1.234 \| good	20.99 \| good	0.194 \| good
2026-09-08T06:00:00.000Z	27 \| good	5.198 \| good	22.319 \| good	12.833 \| good	1.269 \| good	22.959 \| good	0.207 \| good
2026-09-08T07:00:00.000Z	27 \| good	4.832 \| good	20.858 \| good	9.734 \| good	1.252 \| good	24.065 \| good	0.22 \| good
2026-09-08T08:00:00.000Z	38 \| good	7.049 \| good	31.197 \| good	7.12 \| good	1.179 \| good	23.903 \| good	0.224 \| good
2026-09-08T09:00:00.000Z	38 \| good	7.406 \| good	32.887 \| good	6.02 \| good	1.092 \| good	23.114 \| good	0.222 \| good
2026-09-08T10:00:00.000Z	44 \| good	7.611 \| good	33.826 \| good	5.383 \| good	0.984 \| good	21.906 \| good	0.22 \| good
2026-09-08T11:00:00.000Z	38 \| good	7.037 \| good	30.928 \| good	3.726 \| good	0.897 \| good	20.274 \| good	0.216 \| good
2026-09-08T12:00:00.000Z	38 \| good	6.674 \| good	29.636 \| good	0.896 \| good	0.844 \| good	19.214 \| good	0.213 \| good
2026-09-08T13:00:00.000Z	33 \| good	6.099 \| good	27.014 \| good	0.264 \| good	0.819 \| good	19.581 \| good	0.213 \| good
2026-09-08T14:00:00.000Z	52 \| moderate	10.321 \| good	45.664 \| good	3.168 \| good	0.828 \| good	19.713 \| good	0.22 \| good
2026-09-08T15:00:00.000Z	58 \| moderate	13.411 \| fine	60.363 \| fine	9.015 \| good	0.849 \| good	17.418 \| good	0.23 \| good
2026-09-08T16:00:00.000Z	64 \| moderate	16.071 \| fine	71.241 \| fine	19.863 \| good	0.864 \| good	15.485 \| good	0.216 \| good
2026-09-08T17:00:00.000Z	62 \| moderate	14.753 \| fine	66.34 \| fine	31.214 \| good	0.836 \| good	14.474 \| good	0.203 \| good
2026-09-08T18:00:00.000Z	58 \| moderate	13.023 \| fine	58.943 \| fine	42.043 \| good	0.845 \| good	13.507 \| good	0.202 \| good
2026-09-08T19:00:00.000Z	52 \| moderate	9.741 \| good	43.278 \| good	48.606 \| good	0.883 \| good	12.437 \| good	0.199 \| good
2026-09-08T20:00:00.000Z	52 \| moderate	9.769 \| good	43.627 \| good	53.418 \| good	0.942 \| good	11.269 \| good	0.193 \| good
2026-09-08T21:00:00.000Z	48 \| good	6.854 \| good	30.279 \| good	52.463 \| good	0.953 \| good	9.836 \| good	0.184 \| good
2026-09-08T22:00:00.000Z	45 \| good	4.96 \| good	21.395 \| good	49.365 \| good	0.909 \| good	8.023 \| good	0.169 \| good
2026-09-08T23:00:00.000Z	41 \| good	4.296 \| good	19.113 \| good	43.52 \| good	0.836 \| good	6.533 \| good	0.155 \| good
2026-09-09T00:00:00.000Z	36 \| good	4.685 \| good	20.198 \| good	38.531 \| good	0.766 \| good	6.16 \| good	0.147 \| good
2026-09-09T01:00:00.000Z	31 \| good	4.379 \| good	19.18 \| good	33.375 \| good	0.708 \| good	7.301 \| good	0.148 \| good
2026-09-09T02:00:00.000Z	22 \| good	3.793 \| good	16.689 \| good	23.93 \| good	0.668 \| good	10.297 \| good	0.157 \| good
2026-09-09T03:00:00.000Z	22 \| good	3.884 \| good	16.801 \| good	24.399 \| good	0.681 \| good	13.116 \| good	0.168 \| good
2026-09-09T04:00:00.000Z	27 \| good	4.553 \| good	19.808 \| good	21.486 \| good	0.742 \| good	16.786 \| good	0.181 \| good
2026-09-09T05:00:00.000Z	27 \| good	4.929 \| good	21.258 \| good	19.015 \| good	0.819 \| good	19.044 \| good	0.197 \| good
2026-09-09T06:00:00.000Z	27 \| good	5.274 \| good	22.723 \| good	19.248 \| good	0.826 \| good	20.102 \| good	0.206 \| good
2026-09-09T07:00:00.000Z	27 \| good	5.289 \| good	22.915 \| good	18.176 \| good	0.758 \| good	19.07 \| good	0.207 \| good
2026-09-09T08:00:00.000Z	38 \| good	6.586 \| good	29.117 \| good	16.231 \| good	0.686 \| good	16.629 \| good	0.202 \| good
2026-09-09T09:00:00.000Z	33 \| good	5.767 \| good	25.191 \| good	15.289 \| good	0.656 \| good	15.916 \| good	0.2 \| good
2026-09-09T10:00:00.000Z	38 \| good	7.03 \| good	31.113 \| good	17.602 \| good	0.624 \| good	15.946 \| good	0.197 \| good
2026-09-09T11:00:00.000Z	38 \| good	7.445 \| good	32.872 \| good	18.407 \| good	0.581 \| good	15.639 \| good	0.195 \| good

Costa Mesa

Get reliable air quality data to drive your business

Costa Mesa, California air quality map: Stay updated on AQI near you

0.51ppm

How accurate is California, USA air quality data?

Air quality and pollutant data for California, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Costa Mesa, California?

The air quality information for Costa Mesa, California is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Costa Mesa, California at its worst?

In the past 24 hours, the air quality in Costa Mesa, California was at its worst at 10:00:00 on 2026-09-07.

When did Costa Mesa, California experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Costa Mesa, California was observed at 10:00:00 on 2026-09-06.

What is the AQI in Costa Mesa, California right now?

As of now, the AQI in Costa Mesa, California is 62, indicating Moderate conditions.

What is the most common type of pollution in Costa Mesa, California?

Costa Mesa, California air has the highest levels of PM2.5.

What should I do in case of poor air quality in Costa Mesa, California?

Poor air quality in Costa Mesa, California means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Costa Mesa, California at the moment?

PM_2.5 levels in Costa Mesa, California are currently 14.982 μg/m³.

What is the PM₁₀ level in Costa Mesa, California at the moment?

The PM₁₀ concentration in Costa Mesa, California is 20.004 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Costa Mesa, California at the moment?

The current carbon monoxide (CO) concentration in Costa Mesa, California is 0.463 ppm.

What is the sulfur dioxide (SO₂) level in Costa Mesa, California at the moment?

Currently, Costa Mesa, California has a sulfur dioxide (SO₂) concentration of 0.592 ppb.

What is the ozone (O₃) level in Costa Mesa, California at the moment?

The current ozone (O₃) level in Costa Mesa, California at the moment is 4.375 ppm.

What is the nitrogen dioxide (NO₂) level in Costa Mesa, California at the moment?

Nitrogen dioxide (NO₂) level in Costa Mesa, California at the moment is 11.068 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-05T12:00:00.000Z	44 \| good	7.847 \| good	26.619 \| good	18.432 \| good	0.434 \| good	13.946 \| good	0.387 \| good
2026-09-05T13:00:00.000Z	38 \| good	7.343 \| good	17.2 \| good	24.53 \| good	0.432 \| good	12.994 \| good	0.387 \| good
2026-09-05T14:00:00.000Z	52 \| moderate	10.244 \| good	28.624 \| good	18.682 \| good	0.482 \| good	14.654 \| good	0.541 \| good
2026-09-05T15:00:00.000Z	38 \| good	6.982 \| good	19.204 \| good	20.604 \| good	0.709 \| good	20.189 \| good	0.536 \| good
2026-09-05T16:00:00.000Z	64 \| moderate	11.291 \| good	81.055 \| fine	19.66 \| good	0.639 \| good	19.914 \| good	0.537 \| good
2026-09-05T17:00:00.000Z	44 \| good	7.772 \| good	41.678 \| good	23.468 \| good	0.576 \| good	10.185 \| good	0.455 \| good
2026-09-05T18:00:00.000Z	52 \| moderate	9.555 \| good	53.838 \| good	30.647 \| good	0.57 \| good	11.748 \| good	0.495 \| good
2026-09-05T19:00:00.000Z	40 \| good	6.535 \| good	26.484 \| good	43.095 \| good	0.587 \| good	8.365 \| good	0.425 \| good
2026-09-05T20:00:00.000Z	41 \| good	6.035 \| good	21.711 \| good	44.002 \| good	0.559 \| good	6.9 \| good	0.399 \| good
2026-09-05T21:00:00.000Z	40 \| good	4.787 \| good	24.376 \| good	42.801 \| good	0.498 \| good	6.175 \| good	0.452 \| good
2026-09-05T22:00:00.000Z	45 \| good	3.054 \| good	21.231 \| good	49.009 \| good	0.456 \| good	5.404 \| good	0.399 \| good
2026-09-05T23:00:00.000Z	44 \| good	3.352 \| good	25.643 \| good	48.031 \| good	0.642 \| good	5.775 \| good	0.412 \| good
2026-09-06T00:00:00.000Z	40 \| good	4.135 \| good	25.516 \| good	42.559 \| good	0.71 \| good	8.295 \| good	0.372 \| good
2026-09-06T01:00:00.000Z	36 \| good	4.371 \| good	19.083 \| good	39.216 \| good	0.713 \| good	7.631 \| good	0.464 \| good
2026-09-06T02:00:00.000Z	36 \| good	4.047 \| good	14.44 \| good	39.357 \| good	0.667 \| good	9.638 \| good	0.517 \| good
2026-09-06T03:00:00.000Z	38 \| good	6.576 \| good	29.362 \| good	24.254 \| good	0.752 \| good	6.261 \| good	0.139 \| good
2026-09-06T04:00:00.000Z	38 \| good	7.275 \| good	25.467 \| good	36.974 \| good	0.552 \| good	7.792 \| good	0.623 \| good
2026-09-06T05:00:00.000Z	38 \| good	7.46 \| good	24.984 \| good	33.92 \| good	0.785 \| good	9.223 \| good	0.666 \| good
2026-09-06T06:00:00.000Z	49 \| good	8.608 \| good	26.24 \| good	30.578 \| good	0.585 \| good	12.488 \| good	0.679 \| good
2026-09-06T07:00:00.000Z	44 \| good	8.053 \| good	24.228 \| good	29.31 \| good	0.57 \| good	14.241 \| good	0.682 \| good
2026-09-06T08:00:00.000Z	49 \| good	9.298 \| good	40.017 \| good	19.755 \| good	0.573 \| good	16.54 \| good	0.707 \| good
2026-09-06T09:00:00.000Z	49 \| good	9.264 \| good	30.117 \| good	13.693 \| good	0.691 \| good	18.757 \| good	0.541 \| good
2026-09-06T10:00:00.000Z	44 \| good	7.796 \| good	26.617 \| good	19.878 \| good	0.693 \| good	15.636 \| good	0.541 \| good
2026-09-06T11:00:00.000Z	38 \| good	7.444 \| good	19.427 \| good	19.652 \| good	0.694 \| good	12.351 \| good	0.541 \| good
2026-09-06T12:00:00.000Z	38 \| good	7.284 \| good	19.222 \| good	11.698 \| good	0.527 \| good	7.647 \| good	0.568 \| good
2026-09-06T13:00:00.000Z	33 \| good	5.504 \| good	14.325 \| good	13.493 \| good	0.529 \| good	2.916 \| good	0.568 \| good
2026-09-06T14:00:00.000Z	44 \| good	7.971 \| good	16.564 \| good	19.767 \| good	0.512 \| good	5.213 \| good	0.49 \| good
2026-09-06T15:00:00.000Z	52 \| moderate	9.593 \| good	48.553 \| good	16.121 \| good	0.53 \| good	11.596 \| good	0.416 \| good
2026-09-06T16:00:00.000Z	49 \| good	9.355 \| good	24.951 \| good	17.703 \| good	0.484 \| good	16.219 \| good	0.407 \| good
2026-09-06T17:00:00.000Z	49 \| good	8.861 \| good	23.194 \| good	18.176 \| good	0.537 \| good	18.206 \| good	0.473 \| good
2026-09-06T18:00:00.000Z	52 \| moderate	10.374 \| good	31.483 \| good	20.983 \| good	0.484 \| good	12.252 \| good	0.469 \| good
2026-09-06T19:00:00.000Z	49 \| good	9.031 \| good	23.333 \| good	18.879 \| good	0.452 \| good	9.549 \| good	0.346 \| good
2026-09-06T20:00:00.000Z	44 \| good	8.186 \| good	31.237 \| good	18.893 \| good	0.425 \| good	8.587 \| good	0.349 \| good
2026-09-06T21:00:00.000Z	33 \| good	5.978 \| good	12.723 \| good	18.472 \| good	0.442 \| good	9.319 \| good	0.306 \| good
2026-09-06T22:00:00.000Z	33 \| good	6.426 \| good	13.255 \| good	17.16 \| good	0.414 \| good	8.033 \| good	0.306 \| good
2026-09-06T23:00:00.000Z	44 \| good	8.352 \| good	34.407 \| good	18.389 \| good	0.435 \| good	8.991 \| good	0.337 \| good
2026-09-07T00:00:00.000Z	44 \| good	7.539 \| good	23.786 \| good	18.267 \| good	0.454 \| good	10.731 \| good	0.373 \| good
2026-09-07T01:00:00.000Z	49 \| good	8.736 \| good	27.944 \| good	16.107 \| good	0.451 \| good	7.953 \| good	0.398 \| good
2026-09-07T02:00:00.000Z	38 \| good	7.086 \| good	14.073 \| good	11.467 \| good	0.383 \| good	7.654 \| good	0.433 \| good
2026-09-07T03:00:00.000Z	52 \| moderate	9.874 \| good	43.854 \| good	20.004 \| good	0.858 \| good	25.979 \| good	0.199 \| good
2026-09-07T04:00:00.000Z	60 \| moderate	14.423 \| fine	40.95 \| good	10.36 \| good	0.422 \| good	13.03 \| good	0.551 \| good
2026-09-07T05:00:00.000Z	49 \| good	8.765 \| good	29.311 \| good	4.248 \| good	0.639 \| good	14.838 \| good	0.682 \| good
2026-09-07T06:00:00.000Z	49 \| good	9.087 \| good	37.539 \| good	4.848 \| good	0.507 \| good	13.887 \| good	0.697 \| good
2026-09-07T07:00:00.000Z	52 \| moderate	10.408 \| good	44.589 \| good	6.169 \| good	0.511 \| good	13.953 \| good	0.69 \| good
2026-09-07T08:00:00.000Z	60 \| moderate	14.299 \| fine	52.048 \| good	6.952 \| good	0.575 \| good	12.695 \| good	0.605 \| good
2026-09-07T09:00:00.000Z	54 \| moderate	10.865 \| good	29.308 \| good	5.722 \| good	0.632 \| good	11.935 \| good	0.58 \| good
2026-09-07T10:00:00.000Z	62 \| moderate	14.982 \| fine	20.004 \| good	4.375 \| good	0.592 \| good	11.068 \| good	0.463 \| good
2026-09-07T11:00:00.000Z	49 \| good	8.746 \| good	25.863 \| good	5.736 \| good	0.756 \| good	11.438 \| good	0.429 \| good
2026-09-07T11:00:00.000Z	62 \| moderate	14.982 \| fine	20.004 \| good	4.375 \| good	0.592 \| good	11.068 \| good	0.463 \| good
2026-09-07T12:00:00.000Z	56 \| moderate	11.793 \| good	52.116 \| good	5.406 \| good	0.534 \| good	23.462 \| good	0.215 \| good
2026-09-07T13:00:00.000Z	58 \| moderate	12.769 \| fine	57.65 \| fine	3.138 \| good	0.516 \| good	23.132 \| good	0.213 \| good
2026-09-07T14:00:00.000Z	66 \| moderate	16.501 \| fine	73.421 \| fine	4.963 \| good	0.519 \| good	20.365 \| good	0.214 \| good
2026-09-07T15:00:00.000Z	64 \| moderate	16.253 \| fine	71.794 \| fine	10.317 \| good	0.569 \| good	16.77 \| good	0.221 \| good
2026-09-07T16:00:00.000Z	64 \| moderate	15.693 \| fine	69.73 \| fine	17.874 \| good	0.632 \| good	15.479 \| good	0.216 \| good
2026-09-07T17:00:00.000Z	66 \| moderate	16.995 \| fine	75.421 \| fine	28.285 \| good	0.749 \| good	13.296 \| good	0.193 \| good
2026-09-07T18:00:00.000Z	54 \| moderate	10.954 \| good	48.493 \| good	38.54 \| good	0.783 \| good	12.063 \| good	0.189 \| good
2026-09-07T19:00:00.000Z	58 \| moderate	12.504 \| fine	56.061 \| fine	48.918 \| good	0.79 \| good	11.388 \| good	0.189 \| good
2026-09-07T20:00:00.000Z	54 \| moderate	10.28 \| good	45.621 \| good	56.257 \| fine	0.801 \| good	10.19 \| good	0.183 \| good
2026-09-07T21:00:00.000Z	58 \| moderate	10.801 \| good	48.11 \| good	56.724 \| fine	0.838 \| good	8.564 \| good	0.171 \| good
2026-09-07T22:00:00.000Z	44 \| good	7.164 \| good	31.557 \| good	48.228 \| good	0.829 \| good	6.937 \| good	0.159 \| good
2026-09-07T23:00:00.000Z	36 \| good	5.348 \| good	23.146 \| good	38.866 \| good	0.871 \| good	5.877 \| good	0.15 \| good
2026-09-08T00:00:00.000Z	30 \| good	4.583 \| good	20.001 \| good	31.795 \| good	0.911 \| good	5.888 \| good	0.147 \| good
2026-09-08T01:00:00.000Z	23 \| good	3.665 \| good	15.803 \| good	24.786 \| good	0.991 \| good	7.543 \| good	0.15 \| good
2026-09-08T02:00:00.000Z	22 \| good	3.817 \| good	16.401 \| good	19.557 \| good	1.053 \| good	10.819 \| good	0.159 \| good
2026-09-08T03:00:00.000Z	27 \| good	4.701 \| good	20.487 \| good	20.478 \| good	1.12 \| good	14.973 \| good	0.172 \| good
2026-09-08T04:00:00.000Z	22 \| good	4.221 \| good	18.557 \| good	18.76 \| good	1.184 \| good	18.555 \| good	0.184 \| good
2026-09-08T05:00:00.000Z	22 \| good	3.962 \| good	17.301 \| good	17.099 \| good	1.234 \| good	20.99 \| good	0.194 \| good
2026-09-08T06:00:00.000Z	27 \| good	5.198 \| good	22.319 \| good	12.833 \| good	1.269 \| good	22.959 \| good	0.207 \| good
2026-09-08T07:00:00.000Z	27 \| good	4.832 \| good	20.858 \| good	9.734 \| good	1.252 \| good	24.065 \| good	0.22 \| good
2026-09-08T08:00:00.000Z	38 \| good	7.049 \| good	31.197 \| good	7.12 \| good	1.179 \| good	23.903 \| good	0.224 \| good
2026-09-08T09:00:00.000Z	38 \| good	7.406 \| good	32.887 \| good	6.02 \| good	1.092 \| good	23.114 \| good	0.222 \| good
2026-09-08T10:00:00.000Z	44 \| good	7.611 \| good	33.826 \| good	5.383 \| good	0.984 \| good	21.906 \| good	0.22 \| good
2026-09-08T11:00:00.000Z	38 \| good	7.037 \| good	30.928 \| good	3.726 \| good	0.897 \| good	20.274 \| good	0.216 \| good
2026-09-08T12:00:00.000Z	38 \| good	6.674 \| good	29.636 \| good	0.896 \| good	0.844 \| good	19.214 \| good	0.213 \| good
2026-09-08T13:00:00.000Z	33 \| good	6.099 \| good	27.014 \| good	0.264 \| good	0.819 \| good	19.581 \| good	0.213 \| good
2026-09-08T14:00:00.000Z	52 \| moderate	10.321 \| good	45.664 \| good	3.168 \| good	0.828 \| good	19.713 \| good	0.22 \| good
2026-09-08T15:00:00.000Z	58 \| moderate	13.411 \| fine	60.363 \| fine	9.015 \| good	0.849 \| good	17.418 \| good	0.23 \| good
2026-09-08T16:00:00.000Z	64 \| moderate	16.071 \| fine	71.241 \| fine	19.863 \| good	0.864 \| good	15.485 \| good	0.216 \| good
2026-09-08T17:00:00.000Z	62 \| moderate	14.753 \| fine	66.34 \| fine	31.214 \| good	0.836 \| good	14.474 \| good	0.203 \| good
2026-09-08T18:00:00.000Z	58 \| moderate	13.023 \| fine	58.943 \| fine	42.043 \| good	0.845 \| good	13.507 \| good	0.202 \| good
2026-09-08T19:00:00.000Z	52 \| moderate	9.741 \| good	43.278 \| good	48.606 \| good	0.883 \| good	12.437 \| good	0.199 \| good
2026-09-08T20:00:00.000Z	52 \| moderate	9.769 \| good	43.627 \| good	53.418 \| good	0.942 \| good	11.269 \| good	0.193 \| good
2026-09-08T21:00:00.000Z	48 \| good	6.854 \| good	30.279 \| good	52.463 \| good	0.953 \| good	9.836 \| good	0.184 \| good
2026-09-08T22:00:00.000Z	45 \| good	4.96 \| good	21.395 \| good	49.365 \| good	0.909 \| good	8.023 \| good	0.169 \| good
2026-09-08T23:00:00.000Z	41 \| good	4.296 \| good	19.113 \| good	43.52 \| good	0.836 \| good	6.533 \| good	0.155 \| good
2026-09-09T00:00:00.000Z	36 \| good	4.685 \| good	20.198 \| good	38.531 \| good	0.766 \| good	6.16 \| good	0.147 \| good
2026-09-09T01:00:00.000Z	31 \| good	4.379 \| good	19.18 \| good	33.375 \| good	0.708 \| good	7.301 \| good	0.148 \| good
2026-09-09T02:00:00.000Z	22 \| good	3.793 \| good	16.689 \| good	23.93 \| good	0.668 \| good	10.297 \| good	0.157 \| good
2026-09-09T03:00:00.000Z	22 \| good	3.884 \| good	16.801 \| good	24.399 \| good	0.681 \| good	13.116 \| good	0.168 \| good
2026-09-09T04:00:00.000Z	27 \| good	4.553 \| good	19.808 \| good	21.486 \| good	0.742 \| good	16.786 \| good	0.181 \| good
2026-09-09T05:00:00.000Z	27 \| good	4.929 \| good	21.258 \| good	19.015 \| good	0.819 \| good	19.044 \| good	0.197 \| good
2026-09-09T06:00:00.000Z	27 \| good	5.274 \| good	22.723 \| good	19.248 \| good	0.826 \| good	20.102 \| good	0.206 \| good
2026-09-09T07:00:00.000Z	27 \| good	5.289 \| good	22.915 \| good	18.176 \| good	0.758 \| good	19.07 \| good	0.207 \| good
2026-09-09T08:00:00.000Z	38 \| good	6.586 \| good	29.117 \| good	16.231 \| good	0.686 \| good	16.629 \| good	0.202 \| good
2026-09-09T09:00:00.000Z	33 \| good	5.767 \| good	25.191 \| good	15.289 \| good	0.656 \| good	15.916 \| good	0.2 \| good
2026-09-09T10:00:00.000Z	38 \| good	7.03 \| good	31.113 \| good	17.602 \| good	0.624 \| good	15.946 \| good	0.197 \| good
2026-09-09T11:00:00.000Z	38 \| good	7.445 \| good	32.872 \| good	18.407 \| good	0.581 \| good	15.639 \| good	0.195 \| good

Live air quality index in Costa Mesa, California today

Major air pollutants in Costa Mesa, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Costa Mesa, California air quality map: Stay updated on AQI near you

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Frequently asked questions

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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 PM_2.5 level in Costa Mesa, California at the moment?

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What is the sulfur dioxide (SO₂) level in Costa Mesa, California at the moment?

What is the ozone (O₃) level in Costa Mesa, California at the moment?

What is the nitrogen dioxide (NO₂) level in Costa Mesa, California at the moment?