What is the current level of PM10 in Ontario, California?

Ontario, California currently has a PM10 concentration of 28.429 μg/m3.

What is the current level of sulfur dioxide (SO2) in Ontario, California?

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.294 ppb.

What is the current level of ozone (O3) in Ontario, California?

Ontario, California currently has an ozone (O3) concentration of 32.174 ppm.

What is the current level of nitrogen dioxide (NO2) in Ontario, California?

The current level of nitrogen dioxide (NO2) in Ontario, California is 24.553 ppb.

Current air quality index in Ontario, California today

Q: What is the PM2.5 concentration in Ontario, California right now?

Ontario, California currently has a PM2.5 concentration of 12.537 μg/m3.

Stay updated with real-time air quality in Ontario, 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

Ontario, California

Last updated: ... (Local time)

Common air pollutants in Ontario, California

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

12.54 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

28.43 μg/m³

155

255

425

605+

Ozone (O₃)

32.17 ppb

201

201+

Sulfur Dioxide (SO₂)

0.29 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

24.55 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.20 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Ontario, California

Get Live Pollen Counts

Ontario, California

Scroll To Air Quality Map

Track live Ontario, California air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-06T17:00:00.000Z	66 \| moderate	17.162 \| fine	51.747 \| good	36.416 \| good	0.315 \| good	14.963 \| good	0.255 \| good
2026-06-06T18:00:00.000Z	67 \| moderate	17.965 \| fine	48.507 \| good	44.906 \| good	0.293 \| good	12.824 \| good	0.255 \| good
2026-06-06T19:00:00.000Z	67 \| moderate	17.909 \| fine	45.217 \| good	51.733 \| good	0.363 \| good	12.074 \| good	0.268 \| good
2026-06-06T20:00:00.000Z	64 \| moderate	16.404 \| fine	49.85 \| good	57.046 \| fine	0.439 \| good	12.291 \| good	0.255 \| good
2026-06-06T21:00:00.000Z	64 \| moderate	16.063 \| fine	46.465 \| good	57.942 \| fine	0.438 \| good	10.415 \| good	0.255 \| good
2026-06-06T22:00:00.000Z	71 \| moderate	13.721 \| fine	41.792 \| good	60.878 \| fine	0.414 \| good	11.108 \| good	0.258 \| good
2026-06-06T23:00:00.000Z	67 \| moderate	12.428 \| fine	37.246 \| good	59.792 \| fine	0.332 \| good	10.463 \| good	0.248 \| good
2026-06-07T00:00:00.000Z	54 \| moderate	11.163 \| good	41.286 \| good	55.885 \| fine	0.364 \| good	9.369 \| good	0.248 \| good
2026-06-07T01:00:00.000Z	52 \| moderate	9.559 \| good	41.411 \| good	53.43 \| good	0.358 \| good	9.663 \| good	0.248 \| good
2026-06-07T02:00:00.000Z	52 \| moderate	9.539 \| good	34.335 \| good	46.771 \| good	0.335 \| good	9.58 \| good	0.248 \| good
2026-06-07T03:00:00.000Z	52 \| moderate	9.921 \| good	34.275 \| good	45.75 \| good	0.313 \| good	10.868 \| good	0.26 \| good
2026-06-07T04:00:00.000Z	49 \| good	9.076 \| good	32.316 \| good	42.439 \| good	0.405 \| good	10.608 \| good	0.26 \| good
2026-06-07T05:00:00.000Z	49 \| good	8.716 \| good	30.311 \| good	41.083 \| good	0.506 \| good	10.803 \| good	0.248 \| good
2026-06-07T06:00:00.000Z	49 \| good	8.502 \| good	24.802 \| good	41.063 \| good	0.381 \| good	8.852 \| good	0.268 \| good
2026-06-07T07:00:00.000Z	49 \| good	9.372 \| good	26.052 \| good	38.057 \| good	0.377 \| good	8.852 \| good	0.268 \| good
2026-06-07T08:00:00.000Z	54 \| moderate	10.775 \| good	23.165 \| good	35.75 \| good	0.376 \| good	8.905 \| good	0.2 \| good
2026-06-07T09:00:00.000Z	49 \| good	9.465 \| good	23.724 \| good	34.341 \| good	0.388 \| good	8.624 \| good	0.204 \| good
2026-06-07T10:00:00.000Z	52 \| moderate	9.861 \| good	20.7 \| good	35.473 \| good	0.387 \| good	8.624 \| good	0.205 \| good
2026-06-07T11:00:00.000Z	52 \| moderate	10.018 \| good	23.162 \| good	35.584 \| good	0.388 \| good	8.624 \| good	0.205 \| good
2026-06-07T12:00:00.000Z	52 \| moderate	10.385 \| good	21.278 \| good	35.298 \| good	0.247 \| good	8.928 \| good	0.184 \| good
2026-06-07T13:00:00.000Z	54 \| moderate	10.516 \| good	20.827 \| good	34.509 \| good	0.251 \| good	8.928 \| good	0.184 \| good
2026-06-07T14:00:00.000Z	52 \| moderate	10.256 \| good	27.971 \| good	35.208 \| good	0.306 \| good	10.079 \| good	0.208 \| good
2026-06-07T15:00:00.000Z	52 \| moderate	10.163 \| good	26.276 \| good	36.841 \| good	0.372 \| good	10.673 \| good	0.196 \| good
2026-06-07T16:00:00.000Z	54 \| moderate	11.305 \| good	25.083 \| good	39.59 \| good	0.286 \| good	11.568 \| good	0.208 \| good
2026-06-07T17:00:00.000Z	56 \| moderate	11.872 \| good	27.501 \| good	42.371 \| good	0.341 \| good	8.395 \| good	0.196 \| good
2026-06-07T18:00:00.000Z	58 \| moderate	12.741 \| fine	26.461 \| good	45.516 \| good	0.358 \| good	8.117 \| good	0.196 \| good
2026-06-07T19:00:00.000Z	54 \| moderate	10.95 \| good	28.397 \| good	50.012 \| good	0.306 \| good	5.57 \| good	0.196 \| good
2026-06-07T20:00:00.000Z	54 \| moderate	11.155 \| good	32.766 \| good	52.598 \| good	0.366 \| good	7.192 \| good	0.196 \| good
2026-06-07T21:00:00.000Z	52 \| moderate	10.048 \| good	31.593 \| good	54.059 \| good	0.41 \| good	7.387 \| good	0.196 \| good
2026-06-07T22:00:00.000Z	51 \| moderate	9.5 \| good	27.794 \| good	55.28 \| fine	0.444 \| good	8.185 \| good	0.248 \| good
2026-06-07T23:00:00.000Z	54 \| moderate	10.46 \| good	33.294 \| good	56.438 \| fine	0.369 \| good	8.306 \| good	0.196 \| good
2026-06-08T00:00:00.000Z	58 \| moderate	9.857 \| good	38.426 \| good	57.431 \| fine	0.322 \| good	7.788 \| good	0.196 \| good
2026-06-08T01:00:00.000Z	54 \| moderate	10.816 \| good	37.497 \| good	52.929 \| good	0.455 \| good	7.785 \| good	0.248 \| good
2026-06-08T02:00:00.000Z	54 \| moderate	10.719 \| good	31.308 \| good	49.877 \| good	0.409 \| good	9.703 \| good	0.248 \| good
2026-06-08T03:00:00.000Z	49 \| good	9.421 \| good	42.04 \| good	45.35 \| good	0.955 \| good	3.469 \| good	0.113 \| good
2026-06-08T04:00:00.000Z	49 \| good	9.252 \| good	30.347 \| good	42.232 \| good	0.432 \| good	10.871 \| good	0.196 \| good
2026-06-08T05:00:00.000Z	49 \| good	9.176 \| good	40.03 \| good	40.32 \| good	0.703 \| good	10.896 \| good	0.248 \| good
2026-06-08T06:00:00.000Z	52 \| moderate	10.285 \| good	43.807 \| good	36.033 \| good	0.432 \| good	11.944 \| good	0.216 \| good
2026-06-08T07:00:00.000Z	49 \| good	9.243 \| good	27.372 \| good	38.454 \| good	0.424 \| good	11.944 \| good	0.216 \| good
2026-06-08T08:00:00.000Z	54 \| moderate	11.061 \| good	24.149 \| good	30.881 \| good	0.328 \| good	6.778 \| good	0.224 \| good
2026-06-08T09:00:00.000Z	54 \| moderate	10.625 \| good	27.167 \| good	28.311 \| good	0.363 \| good	7.538 \| good	0.224 \| good
2026-06-08T10:00:00.000Z	49 \| good	8.84 \| good	25.105 \| good	28.405 \| good	0.326 \| good	7.204 \| good	0.2 \| good
2026-06-08T11:00:00.000Z	49 \| good	8.919 \| good	32.087 \| good	28.702 \| good	0.408 \| good	7.728 \| good	0.188 \| good
2026-06-08T12:00:00.000Z	52 \| moderate	10.082 \| good	28.44 \| good	29.951 \| good	0.303 \| good	12.744 \| good	0.135 \| good
2026-06-08T13:00:00.000Z	54 \| moderate	10.825 \| good	27.613 \| good	30.946 \| good	0.312 \| good	12.744 \| good	0.135 \| good
2026-06-08T14:00:00.000Z	54 \| moderate	11.477 \| good	25.68 \| good	31.471 \| good	0.312 \| good	18.904 \| good	0.182 \| good
2026-06-08T15:00:00.000Z	56 \| moderate	11.719 \| good	27.152 \| good	31.796 \| good	0.298 \| good	19.178 \| good	0.196 \| good
2026-06-08T16:00:00.000Z	58 \| moderate	12.537 \| fine	28.429 \| good	32.174 \| good	0.294 \| good	24.553 \| good	0.197 \| good
2026-06-08T17:00:00.000Z	66 \| moderate	17.423 \| fine	76.831 \| fine	43.497 \| good	0.852 \| good	3.717 \| good	0.125 \| good
2026-06-08T18:00:00.000Z	66 \| moderate	16.559 \| fine	72.834 \| fine	51.591 \| good	0.809 \| good	2.75 \| good	0.122 \| good
2026-06-08T19:00:00.000Z	62 \| moderate	15.359 \| fine	68.375 \| fine	58.273 \| fine	0.782 \| good	1.991 \| good	0.12 \| good
2026-06-08T20:00:00.000Z	74 \| moderate	16.717 \| fine	74.542 \| fine	62.056 \| fine	0.765 \| good	1.546 \| good	0.118 \| good
2026-06-08T21:00:00.000Z	87 \| moderate	15.579 \| fine	69.186 \| fine	66.183 \| fine	0.767 \| good	1.363 \| good	0.116 \| good
2026-06-08T22:00:00.000Z	93 \| moderate	13.266 \| fine	59.317 \| fine	67.884 \| fine	0.803 \| good	1.335 \| good	0.115 \| good
2026-06-08T23:00:00.000Z	87 \| moderate	11.61 \| good	51.389 \| good	65.601 \| fine	0.84 \| good	1.379 \| good	0.114 \| good
2026-06-09T00:00:00.000Z	77 \| moderate	13.209 \| fine	59.317 \| fine	63.063 \| fine	0.865 \| good	1.55 \| good	0.113 \| good
2026-06-09T01:00:00.000Z	58 \| moderate	13.089 \| fine	59.002 \| fine	56.786 \| fine	0.917 \| good	2.061 \| good	0.114 \| good
2026-06-09T02:00:00.000Z	60 \| moderate	13.579 \| fine	61.054 \| fine	45.784 \| good	1.02 \| good	3.021 \| good	0.114 \| good
2026-06-09T03:00:00.000Z	58 \| moderate	12.587 \| fine	56.846 \| fine	43.985 \| good	1.114 \| good	4.499 \| good	0.116 \| good
2026-06-09T04:00:00.000Z	58 \| moderate	12.71 \| fine	56.983 \| fine	38.84 \| good	1.149 \| good	5.992 \| good	0.12 \| good
2026-06-09T05:00:00.000Z	58 \| moderate	13.406 \| fine	60.793 \| fine	35.752 \| good	1.141 \| good	7.776 \| good	0.125 \| good
2026-06-09T06:00:00.000Z	58 \| moderate	13.273 \| fine	60.54 \| fine	34.019 \| good	1.13 \| good	9.481 \| good	0.131 \| good
2026-06-09T07:00:00.000Z	60 \| moderate	13.574 \| fine	60.994 \| fine	32.298 \| good	1.095 \| good	11.748 \| good	0.14 \| good
2026-06-09T08:00:00.000Z	58 \| moderate	12.854 \| fine	58.41 \| fine	28.26 \| good	1.059 \| good	13.36 \| good	0.147 \| good
2026-06-09T09:00:00.000Z	56 \| moderate	12.174 \| fine	54.598 \| good	24.511 \| good	1.04 \| good	15.175 \| good	0.154 \| good
2026-06-09T10:00:00.000Z	56 \| moderate	12.431 \| fine	56.181 \| fine	22.43 \| good	1.03 \| good	16.629 \| good	0.16 \| good
2026-06-09T11:00:00.000Z	54 \| moderate	11.499 \| good	50.398 \| good	22.996 \| good	1.037 \| good	17.972 \| good	0.165 \| good
2026-06-09T12:00:00.000Z	58 \| moderate	12.682 \| fine	56.497 \| fine	24.288 \| good	1.058 \| good	19.482 \| good	0.171 \| good
2026-06-09T13:00:00.000Z	58 \| moderate	12.783 \| fine	57.769 \| fine	26.046 \| good	1.078 \| good	19.303 \| good	0.181 \| good
2026-06-09T14:00:00.000Z	64 \| moderate	16.013 \| fine	71.841 \| fine	27.892 \| good	1.064 \| good	14.883 \| good	0.184 \| good
2026-06-09T15:00:00.000Z	64 \| moderate	16.116 \| fine	71.724 \| fine	31.389 \| good	1.082 \| good	7.868 \| good	0.141 \| good
2026-06-09T16:00:00.000Z	66 \| moderate	16.772 \| fine	74.368 \| fine	34.085 \| good	0.982 \| good	5.894 \| good	0.133 \| good
2026-06-09T17:00:00.000Z	67 \| moderate	17.851 \| fine	78.791 \| fine	38.218 \| good	0.904 \| good	4.512 \| good	0.127 \| good
2026-06-09T18:00:00.000Z	66 \| moderate	16.741 \| fine	74.7 \| fine	46.313 \| good	0.874 \| good	3.46 \| good	0.123 \| good
2026-06-09T19:00:00.000Z	69 \| moderate	18.592 \| fine	82.493 \| fine	53.18 \| good	0.873 \| good	2.572 \| good	0.121 \| good
2026-06-09T20:00:00.000Z	71 \| moderate	19.083 \| fine	84.785 \| fine	61.456 \| fine	0.897 \| good	1.988 \| good	0.12 \| good
2026-06-09T21:00:00.000Z	97 \| moderate	18.853 \| fine	83.134 \| fine	68.754 \| fine	0.96 \| good	1.713 \| good	0.119 \| good
2026-06-09T22:00:00.000Z	108 \| sensitive	18.289 \| fine	81.31 \| fine	72.853 \| moderate	1.041 \| good	1.597 \| good	0.119 \| good
2026-06-09T23:00:00.000Z	100 \| moderate	17.338 \| fine	77.41 \| fine	70.461 \| fine	1.128 \| good	1.614 \| good	0.119 \| good
2026-06-10T00:00:00.000Z	87 \| moderate	17.593 \| fine	77.588 \| fine	65.971 \| fine	1.216 \| good	1.83 \| good	0.12 \| good
2026-06-10T01:00:00.000Z	71 \| moderate	16.438 \| fine	73.217 \| fine	60.672 \| fine	1.311 \| good	2.346 \| good	0.121 \| good
2026-06-10T02:00:00.000Z	64 \| moderate	16.297 \| fine	71.973 \| fine	50.997 \| good	1.41 \| good	3.283 \| good	0.122 \| good
2026-06-10T03:00:00.000Z	64 \| moderate	16.194 \| fine	71.951 \| fine	45.127 \| good	1.492 \| good	4.777 \| good	0.124 \| good
2026-06-10T04:00:00.000Z	62 \| moderate	15.392 \| fine	68.05 \| fine	38.644 \| good	1.508 \| good	6.525 \| good	0.128 \| good
2026-06-10T05:00:00.000Z	62 \| moderate	14.847 \| fine	65.966 \| fine	35.344 \| good	1.47 \| good	8.371 \| good	0.133 \| good
2026-06-10T06:00:00.000Z	64 \| moderate	15.86 \| fine	21.714 \| good	36.982 \| good	1.415 \| good	10.092 \| good	0.137 \| good
2026-06-10T07:00:00.000Z	62 \| moderate	14.907 \| fine	67.061 \| fine	32.943 \| good	1.366 \| good	11.907 \| good	0.144 \| good
2026-06-10T08:00:00.000Z	62 \| moderate	14.675 \| fine	65.518 \| fine	27.707 \| good	1.337 \| good	13.597 \| good	0.151 \| good
2026-06-10T09:00:00.000Z	60 \| moderate	13.832 \| fine	61.578 \| fine	22.801 \| good	1.347 \| good	15.354 \| good	0.158 \| good
2026-06-10T10:00:00.000Z	58 \| moderate	13.324 \| fine	60.72 \| fine	17.895 \| good	1.366 \| good	16.831 \| good	0.165 \| good
2026-06-10T11:00:00.000Z	58 \| moderate	12.813 \| fine	58.18 \| fine	16.218 \| good	1.388 \| good	18.25 \| good	0.172 \| good
2026-06-10T12:00:00.000Z	73 \| moderate	21.434 \| fine	28.393 \| good	16.211 \| good	1.401 \| good	19.625 \| good	0.18 \| good
2026-06-10T13:00:00.000Z	77 \| moderate	22.788 \| fine	30.495 \| good	15.555 \| good	1.396 \| good	20.067 \| good	0.192 \| good
2026-06-10T14:00:00.000Z	77 \| moderate	23.033 \| fine	30.396 \| good	16.452 \| good	1.317 \| good	17.223 \| good	0.209 \| good
2026-06-10T15:00:00.000Z	69 \| moderate	19.159 \| fine	29.76 \| good	31.412 \| good	1.368 \| good	8.912 \| good	0.148 \| good
2026-06-10T16:00:00.000Z	66 \| moderate	16.975 \| fine	28.292 \| good	37.52 \| good	1.132 \| good	6.396 \| good	0.134 \| good

Ontario

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Ontario, California

0.20ppm

How accurate is California, USA air quality data?

The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

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Frequently asked questions

How frequently does the air quality data for Ontario, California get updated?

Air quality updates for Ontario, California are available every hour.

What time in the past 24 hours saw the poorest air quality in Ontario, California?

Ontario, California experienced its worst air quality at 12:00:00, 2026-06-08.

When was air quality in Ontario, California the best over the past 24 hours?

The best air quality in Ontario, California was observed at 11:00:00 on 2026-06-08.

What is the air quality in Ontario, California right now?

The air quality in Ontario, California right now is Moderate, with an AQI of 58.

What pollutant is most frequently found in Ontario, California?

In Ontario, California, PM2.5 is the most frequently found pollutant.

What can I do if the air quality in Ontario, California is poor?

When air quality in Ontario, California is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Ontario, California right now?

Ontario, California currently has a PM_2.5 concentration of 12.537 μg/m³.

What is the current level of PM₁₀ in Ontario, California?

Ontario, California currently has a PM₁₀ concentration of 28.429 μg/m³.

What is the current level of carbon monoxide (CO) in Ontario, California?

The current carbon monoxide (CO) level in Ontario, California is 0.197 ppm.

What is the current level of sulfur dioxide (SO₂) in Ontario, California?

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.294 ppb.

What is the current level of ozone (O₃) in Ontario, California?

Ontario, California currently has an ozone (O₃) concentration of 32.174 ppm.

What is the current level of nitrogen dioxide (NO₂) in Ontario, California?

The current level of nitrogen dioxide (NO₂) in Ontario, California is 24.553 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-06-06T17:00:00.000Z	66 \| moderate	17.162 \| fine	51.747 \| good	36.416 \| good	0.315 \| good	14.963 \| good	0.255 \| good
2026-06-06T18:00:00.000Z	67 \| moderate	17.965 \| fine	48.507 \| good	44.906 \| good	0.293 \| good	12.824 \| good	0.255 \| good
2026-06-06T19:00:00.000Z	67 \| moderate	17.909 \| fine	45.217 \| good	51.733 \| good	0.363 \| good	12.074 \| good	0.268 \| good
2026-06-06T20:00:00.000Z	64 \| moderate	16.404 \| fine	49.85 \| good	57.046 \| fine	0.439 \| good	12.291 \| good	0.255 \| good
2026-06-06T21:00:00.000Z	64 \| moderate	16.063 \| fine	46.465 \| good	57.942 \| fine	0.438 \| good	10.415 \| good	0.255 \| good
2026-06-06T22:00:00.000Z	71 \| moderate	13.721 \| fine	41.792 \| good	60.878 \| fine	0.414 \| good	11.108 \| good	0.258 \| good
2026-06-06T23:00:00.000Z	67 \| moderate	12.428 \| fine	37.246 \| good	59.792 \| fine	0.332 \| good	10.463 \| good	0.248 \| good
2026-06-07T00:00:00.000Z	54 \| moderate	11.163 \| good	41.286 \| good	55.885 \| fine	0.364 \| good	9.369 \| good	0.248 \| good
2026-06-07T01:00:00.000Z	52 \| moderate	9.559 \| good	41.411 \| good	53.43 \| good	0.358 \| good	9.663 \| good	0.248 \| good
2026-06-07T02:00:00.000Z	52 \| moderate	9.539 \| good	34.335 \| good	46.771 \| good	0.335 \| good	9.58 \| good	0.248 \| good
2026-06-07T03:00:00.000Z	52 \| moderate	9.921 \| good	34.275 \| good	45.75 \| good	0.313 \| good	10.868 \| good	0.26 \| good
2026-06-07T04:00:00.000Z	49 \| good	9.076 \| good	32.316 \| good	42.439 \| good	0.405 \| good	10.608 \| good	0.26 \| good
2026-06-07T05:00:00.000Z	49 \| good	8.716 \| good	30.311 \| good	41.083 \| good	0.506 \| good	10.803 \| good	0.248 \| good
2026-06-07T06:00:00.000Z	49 \| good	8.502 \| good	24.802 \| good	41.063 \| good	0.381 \| good	8.852 \| good	0.268 \| good
2026-06-07T07:00:00.000Z	49 \| good	9.372 \| good	26.052 \| good	38.057 \| good	0.377 \| good	8.852 \| good	0.268 \| good
2026-06-07T08:00:00.000Z	54 \| moderate	10.775 \| good	23.165 \| good	35.75 \| good	0.376 \| good	8.905 \| good	0.2 \| good
2026-06-07T09:00:00.000Z	49 \| good	9.465 \| good	23.724 \| good	34.341 \| good	0.388 \| good	8.624 \| good	0.204 \| good
2026-06-07T10:00:00.000Z	52 \| moderate	9.861 \| good	20.7 \| good	35.473 \| good	0.387 \| good	8.624 \| good	0.205 \| good
2026-06-07T11:00:00.000Z	52 \| moderate	10.018 \| good	23.162 \| good	35.584 \| good	0.388 \| good	8.624 \| good	0.205 \| good
2026-06-07T12:00:00.000Z	52 \| moderate	10.385 \| good	21.278 \| good	35.298 \| good	0.247 \| good	8.928 \| good	0.184 \| good
2026-06-07T13:00:00.000Z	54 \| moderate	10.516 \| good	20.827 \| good	34.509 \| good	0.251 \| good	8.928 \| good	0.184 \| good
2026-06-07T14:00:00.000Z	52 \| moderate	10.256 \| good	27.971 \| good	35.208 \| good	0.306 \| good	10.079 \| good	0.208 \| good
2026-06-07T15:00:00.000Z	52 \| moderate	10.163 \| good	26.276 \| good	36.841 \| good	0.372 \| good	10.673 \| good	0.196 \| good
2026-06-07T16:00:00.000Z	54 \| moderate	11.305 \| good	25.083 \| good	39.59 \| good	0.286 \| good	11.568 \| good	0.208 \| good
2026-06-07T17:00:00.000Z	56 \| moderate	11.872 \| good	27.501 \| good	42.371 \| good	0.341 \| good	8.395 \| good	0.196 \| good
2026-06-07T18:00:00.000Z	58 \| moderate	12.741 \| fine	26.461 \| good	45.516 \| good	0.358 \| good	8.117 \| good	0.196 \| good
2026-06-07T19:00:00.000Z	54 \| moderate	10.95 \| good	28.397 \| good	50.012 \| good	0.306 \| good	5.57 \| good	0.196 \| good
2026-06-07T20:00:00.000Z	54 \| moderate	11.155 \| good	32.766 \| good	52.598 \| good	0.366 \| good	7.192 \| good	0.196 \| good
2026-06-07T21:00:00.000Z	52 \| moderate	10.048 \| good	31.593 \| good	54.059 \| good	0.41 \| good	7.387 \| good	0.196 \| good
2026-06-07T22:00:00.000Z	51 \| moderate	9.5 \| good	27.794 \| good	55.28 \| fine	0.444 \| good	8.185 \| good	0.248 \| good
2026-06-07T23:00:00.000Z	54 \| moderate	10.46 \| good	33.294 \| good	56.438 \| fine	0.369 \| good	8.306 \| good	0.196 \| good
2026-06-08T00:00:00.000Z	58 \| moderate	9.857 \| good	38.426 \| good	57.431 \| fine	0.322 \| good	7.788 \| good	0.196 \| good
2026-06-08T01:00:00.000Z	54 \| moderate	10.816 \| good	37.497 \| good	52.929 \| good	0.455 \| good	7.785 \| good	0.248 \| good
2026-06-08T02:00:00.000Z	54 \| moderate	10.719 \| good	31.308 \| good	49.877 \| good	0.409 \| good	9.703 \| good	0.248 \| good
2026-06-08T03:00:00.000Z	49 \| good	9.421 \| good	42.04 \| good	45.35 \| good	0.955 \| good	3.469 \| good	0.113 \| good
2026-06-08T04:00:00.000Z	49 \| good	9.252 \| good	30.347 \| good	42.232 \| good	0.432 \| good	10.871 \| good	0.196 \| good
2026-06-08T05:00:00.000Z	49 \| good	9.176 \| good	40.03 \| good	40.32 \| good	0.703 \| good	10.896 \| good	0.248 \| good
2026-06-08T06:00:00.000Z	52 \| moderate	10.285 \| good	43.807 \| good	36.033 \| good	0.432 \| good	11.944 \| good	0.216 \| good
2026-06-08T07:00:00.000Z	49 \| good	9.243 \| good	27.372 \| good	38.454 \| good	0.424 \| good	11.944 \| good	0.216 \| good
2026-06-08T08:00:00.000Z	54 \| moderate	11.061 \| good	24.149 \| good	30.881 \| good	0.328 \| good	6.778 \| good	0.224 \| good
2026-06-08T09:00:00.000Z	54 \| moderate	10.625 \| good	27.167 \| good	28.311 \| good	0.363 \| good	7.538 \| good	0.224 \| good
2026-06-08T10:00:00.000Z	49 \| good	8.84 \| good	25.105 \| good	28.405 \| good	0.326 \| good	7.204 \| good	0.2 \| good
2026-06-08T11:00:00.000Z	49 \| good	8.919 \| good	32.087 \| good	28.702 \| good	0.408 \| good	7.728 \| good	0.188 \| good
2026-06-08T12:00:00.000Z	52 \| moderate	10.082 \| good	28.44 \| good	29.951 \| good	0.303 \| good	12.744 \| good	0.135 \| good
2026-06-08T13:00:00.000Z	54 \| moderate	10.825 \| good	27.613 \| good	30.946 \| good	0.312 \| good	12.744 \| good	0.135 \| good
2026-06-08T14:00:00.000Z	54 \| moderate	11.477 \| good	25.68 \| good	31.471 \| good	0.312 \| good	18.904 \| good	0.182 \| good
2026-06-08T15:00:00.000Z	56 \| moderate	11.719 \| good	27.152 \| good	31.796 \| good	0.298 \| good	19.178 \| good	0.196 \| good
2026-06-08T16:00:00.000Z	58 \| moderate	12.537 \| fine	28.429 \| good	32.174 \| good	0.294 \| good	24.553 \| good	0.197 \| good
2026-06-08T17:00:00.000Z	66 \| moderate	17.423 \| fine	76.831 \| fine	43.497 \| good	0.852 \| good	3.717 \| good	0.125 \| good
2026-06-08T18:00:00.000Z	66 \| moderate	16.559 \| fine	72.834 \| fine	51.591 \| good	0.809 \| good	2.75 \| good	0.122 \| good
2026-06-08T19:00:00.000Z	62 \| moderate	15.359 \| fine	68.375 \| fine	58.273 \| fine	0.782 \| good	1.991 \| good	0.12 \| good
2026-06-08T20:00:00.000Z	74 \| moderate	16.717 \| fine	74.542 \| fine	62.056 \| fine	0.765 \| good	1.546 \| good	0.118 \| good
2026-06-08T21:00:00.000Z	87 \| moderate	15.579 \| fine	69.186 \| fine	66.183 \| fine	0.767 \| good	1.363 \| good	0.116 \| good
2026-06-08T22:00:00.000Z	93 \| moderate	13.266 \| fine	59.317 \| fine	67.884 \| fine	0.803 \| good	1.335 \| good	0.115 \| good
2026-06-08T23:00:00.000Z	87 \| moderate	11.61 \| good	51.389 \| good	65.601 \| fine	0.84 \| good	1.379 \| good	0.114 \| good
2026-06-09T00:00:00.000Z	77 \| moderate	13.209 \| fine	59.317 \| fine	63.063 \| fine	0.865 \| good	1.55 \| good	0.113 \| good
2026-06-09T01:00:00.000Z	58 \| moderate	13.089 \| fine	59.002 \| fine	56.786 \| fine	0.917 \| good	2.061 \| good	0.114 \| good
2026-06-09T02:00:00.000Z	60 \| moderate	13.579 \| fine	61.054 \| fine	45.784 \| good	1.02 \| good	3.021 \| good	0.114 \| good
2026-06-09T03:00:00.000Z	58 \| moderate	12.587 \| fine	56.846 \| fine	43.985 \| good	1.114 \| good	4.499 \| good	0.116 \| good
2026-06-09T04:00:00.000Z	58 \| moderate	12.71 \| fine	56.983 \| fine	38.84 \| good	1.149 \| good	5.992 \| good	0.12 \| good
2026-06-09T05:00:00.000Z	58 \| moderate	13.406 \| fine	60.793 \| fine	35.752 \| good	1.141 \| good	7.776 \| good	0.125 \| good
2026-06-09T06:00:00.000Z	58 \| moderate	13.273 \| fine	60.54 \| fine	34.019 \| good	1.13 \| good	9.481 \| good	0.131 \| good
2026-06-09T07:00:00.000Z	60 \| moderate	13.574 \| fine	60.994 \| fine	32.298 \| good	1.095 \| good	11.748 \| good	0.14 \| good
2026-06-09T08:00:00.000Z	58 \| moderate	12.854 \| fine	58.41 \| fine	28.26 \| good	1.059 \| good	13.36 \| good	0.147 \| good
2026-06-09T09:00:00.000Z	56 \| moderate	12.174 \| fine	54.598 \| good	24.511 \| good	1.04 \| good	15.175 \| good	0.154 \| good
2026-06-09T10:00:00.000Z	56 \| moderate	12.431 \| fine	56.181 \| fine	22.43 \| good	1.03 \| good	16.629 \| good	0.16 \| good
2026-06-09T11:00:00.000Z	54 \| moderate	11.499 \| good	50.398 \| good	22.996 \| good	1.037 \| good	17.972 \| good	0.165 \| good
2026-06-09T12:00:00.000Z	58 \| moderate	12.682 \| fine	56.497 \| fine	24.288 \| good	1.058 \| good	19.482 \| good	0.171 \| good
2026-06-09T13:00:00.000Z	58 \| moderate	12.783 \| fine	57.769 \| fine	26.046 \| good	1.078 \| good	19.303 \| good	0.181 \| good
2026-06-09T14:00:00.000Z	64 \| moderate	16.013 \| fine	71.841 \| fine	27.892 \| good	1.064 \| good	14.883 \| good	0.184 \| good
2026-06-09T15:00:00.000Z	64 \| moderate	16.116 \| fine	71.724 \| fine	31.389 \| good	1.082 \| good	7.868 \| good	0.141 \| good
2026-06-09T16:00:00.000Z	66 \| moderate	16.772 \| fine	74.368 \| fine	34.085 \| good	0.982 \| good	5.894 \| good	0.133 \| good
2026-06-09T17:00:00.000Z	67 \| moderate	17.851 \| fine	78.791 \| fine	38.218 \| good	0.904 \| good	4.512 \| good	0.127 \| good
2026-06-09T18:00:00.000Z	66 \| moderate	16.741 \| fine	74.7 \| fine	46.313 \| good	0.874 \| good	3.46 \| good	0.123 \| good
2026-06-09T19:00:00.000Z	69 \| moderate	18.592 \| fine	82.493 \| fine	53.18 \| good	0.873 \| good	2.572 \| good	0.121 \| good
2026-06-09T20:00:00.000Z	71 \| moderate	19.083 \| fine	84.785 \| fine	61.456 \| fine	0.897 \| good	1.988 \| good	0.12 \| good
2026-06-09T21:00:00.000Z	97 \| moderate	18.853 \| fine	83.134 \| fine	68.754 \| fine	0.96 \| good	1.713 \| good	0.119 \| good
2026-06-09T22:00:00.000Z	108 \| sensitive	18.289 \| fine	81.31 \| fine	72.853 \| moderate	1.041 \| good	1.597 \| good	0.119 \| good
2026-06-09T23:00:00.000Z	100 \| moderate	17.338 \| fine	77.41 \| fine	70.461 \| fine	1.128 \| good	1.614 \| good	0.119 \| good
2026-06-10T00:00:00.000Z	87 \| moderate	17.593 \| fine	77.588 \| fine	65.971 \| fine	1.216 \| good	1.83 \| good	0.12 \| good
2026-06-10T01:00:00.000Z	71 \| moderate	16.438 \| fine	73.217 \| fine	60.672 \| fine	1.311 \| good	2.346 \| good	0.121 \| good
2026-06-10T02:00:00.000Z	64 \| moderate	16.297 \| fine	71.973 \| fine	50.997 \| good	1.41 \| good	3.283 \| good	0.122 \| good
2026-06-10T03:00:00.000Z	64 \| moderate	16.194 \| fine	71.951 \| fine	45.127 \| good	1.492 \| good	4.777 \| good	0.124 \| good
2026-06-10T04:00:00.000Z	62 \| moderate	15.392 \| fine	68.05 \| fine	38.644 \| good	1.508 \| good	6.525 \| good	0.128 \| good
2026-06-10T05:00:00.000Z	62 \| moderate	14.847 \| fine	65.966 \| fine	35.344 \| good	1.47 \| good	8.371 \| good	0.133 \| good
2026-06-10T06:00:00.000Z	64 \| moderate	15.86 \| fine	21.714 \| good	36.982 \| good	1.415 \| good	10.092 \| good	0.137 \| good
2026-06-10T07:00:00.000Z	62 \| moderate	14.907 \| fine	67.061 \| fine	32.943 \| good	1.366 \| good	11.907 \| good	0.144 \| good
2026-06-10T08:00:00.000Z	62 \| moderate	14.675 \| fine	65.518 \| fine	27.707 \| good	1.337 \| good	13.597 \| good	0.151 \| good
2026-06-10T09:00:00.000Z	60 \| moderate	13.832 \| fine	61.578 \| fine	22.801 \| good	1.347 \| good	15.354 \| good	0.158 \| good
2026-06-10T10:00:00.000Z	58 \| moderate	13.324 \| fine	60.72 \| fine	17.895 \| good	1.366 \| good	16.831 \| good	0.165 \| good
2026-06-10T11:00:00.000Z	58 \| moderate	12.813 \| fine	58.18 \| fine	16.218 \| good	1.388 \| good	18.25 \| good	0.172 \| good
2026-06-10T12:00:00.000Z	73 \| moderate	21.434 \| fine	28.393 \| good	16.211 \| good	1.401 \| good	19.625 \| good	0.18 \| good
2026-06-10T13:00:00.000Z	77 \| moderate	22.788 \| fine	30.495 \| good	15.555 \| good	1.396 \| good	20.067 \| good	0.192 \| good
2026-06-10T14:00:00.000Z	77 \| moderate	23.033 \| fine	30.396 \| good	16.452 \| good	1.317 \| good	17.223 \| good	0.209 \| good
2026-06-10T15:00:00.000Z	69 \| moderate	19.159 \| fine	29.76 \| good	31.412 \| good	1.368 \| good	8.912 \| good	0.148 \| good
2026-06-10T16:00:00.000Z	66 \| moderate	16.975 \| fine	28.292 \| good	37.52 \| good	1.132 \| good	6.396 \| good	0.134 \| good

Current air quality index in Ontario, California today

Common air pollutants in Ontario, California

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Ontario, California air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Ontario, California

Air quality in nearby cities

Upland, California

Montclair, California

Chino, California

Rancho Cucamonga, California

Claremont, California

Pomona, California

How accurate is California, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently does the air quality data for Ontario, California get updated?

What time in the past 24 hours saw the poorest air quality in Ontario, California?

When was air quality in Ontario, California the best over the past 24 hours?

What is the air quality in Ontario, California right now?

What pollutant is most frequently found in Ontario, California?

What can I do if the air quality in Ontario, California is poor?

What is the PM2.5 concentration in Ontario, California right now?

What is the current level of PM10 in Ontario, California?

What is the current level of carbon monoxide (CO) in Ontario, California?

What is the current level of sulfur dioxide (SO2) in Ontario, California?

What is the current level of ozone (O3) in Ontario, California?

What is the current level of nitrogen dioxide (NO2) in Ontario, California?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 concentration in Ontario, California right now?

What is the current level of PM₁₀ in Ontario, California?

What is the current level of sulfur dioxide (SO₂) in Ontario, California?

What is the current level of ozone (O₃) in Ontario, California?

What is the current level of nitrogen dioxide (NO₂) in Ontario, California?