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

Ontario, California currently has a PM10 concentration of 26.157 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.588 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 45.862 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 3.824 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 3.549 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)

Good

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)

3.55 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

26.16 μg/m³

155

255

425

605+

Ozone (O₃)

45.86 ppb

201

201+

Sulfur Dioxide (SO₂)

0.59 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

3.82 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.13 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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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
2026-03-05T00:00:00.000Z	52 \| moderate	9.923 \| good	44.28 \| good	50.578 \| good	0.688 \| good	7.419 \| good	0.344 \| good
2026-03-05T01:00:00.000Z	60 \| moderate	14.091 \| fine	36.671 \| good	45.138 \| good	0.564 \| good	7.979 \| good	0.336 \| good
2026-03-05T02:00:00.000Z	56 \| moderate	12.147 \| fine	23.491 \| good	38.194 \| good	0.623 \| good	7.943 \| good	0.336 \| good
2026-03-05T03:00:00.000Z	58 \| moderate	12.655 \| fine	56.658 \| fine	31.044 \| good	6.114 \| good	44.635 \| good	0.331 \| good
2026-03-05T04:00:00.000Z	58 \| moderate	13.219 \| fine	41.87 \| good	33.906 \| good	0.544 \| good	11.296 \| good	0.357 \| good
2026-03-05T05:00:00.000Z	56 \| moderate	11.832 \| good	34.268 \| good	31.078 \| good	0.639 \| good	13.167 \| good	0.365 \| good
2026-03-05T06:00:00.000Z	54 \| moderate	11.228 \| good	29.332 \| good	29.249 \| good	0.484 \| good	11.055 \| good	0.326 \| good
2026-03-05T07:00:00.000Z	56 \| moderate	11.7 \| good	32.534 \| good	28.902 \| good	0.472 \| good	9.976 \| good	0.326 \| good
2026-03-05T08:00:00.000Z	54 \| moderate	11.198 \| good	44.278 \| good	27.684 \| good	0.46 \| good	8.296 \| good	0.374 \| good
2026-03-05T09:00:00.000Z	54 \| moderate	10.649 \| good	34.992 \| good	23.455 \| good	0.475 \| good	6.6 \| good	0.27 \| good
2026-03-05T10:00:00.000Z	58 \| moderate	13.461 \| fine	40.258 \| good	22.193 \| good	0.453 \| good	6.79 \| good	0.291 \| good
2026-03-05T11:00:00.000Z	52 \| moderate	9.759 \| good	17.74 \| good	22.253 \| good	0.615 \| good	7.996 \| good	0.27 \| good
2026-03-05T12:00:00.000Z	56 \| moderate	11.707 \| good	27.496 \| good	23.431 \| good	0.477 \| good	7.742 \| good	0.278 \| good
2026-03-05T13:00:00.000Z	60 \| moderate	14.129 \| fine	28.724 \| good	26.263 \| good	0.505 \| good	6.59 \| good	0.278 \| good
2026-03-05T14:00:00.000Z	66 \| moderate	16.729 \| fine	69.948 \| fine	22.044 \| good	0.55 \| good	11.219 \| good	0.418 \| good
2026-03-05T15:00:00.000Z	60 \| moderate	14.463 \| fine	53.341 \| good	24.236 \| good	0.564 \| good	11.5 \| good	0.489 \| good
2026-03-05T16:00:00.000Z	57 \| moderate	3.714 \| good	68.422 \| fine	30.15 \| good	0.569 \| good	14.712 \| good	0.445 \| good
2026-03-05T17:00:00.000Z	30 \| good	5.267 \| good	31.708 \| good	28.821 \| good	0.575 \| good	8.51 \| good	0.319 \| good
2026-03-05T18:00:00.000Z	64 \| moderate	15.928 \| fine	62.585 \| fine	35.624 \| good	0.544 \| good	7.73 \| good	0.266 \| good
2026-03-05T19:00:00.000Z	115 \| sensitive	40.624 \| moderate	87.422 \| fine	39.137 \| good	0.595 \| good	6.604 \| good	0.218 \| good
2026-03-05T20:00:00.000Z	147 \| sensitive	53.691 \| moderate	154.314 \| fine	39.808 \| good	0.629 \| good	2.878 \| good	0.135 \| good
2026-03-05T21:00:00.000Z	42 \| good	7.185 \| good	37.876 \| good	45.063 \| good	0.55 \| good	2.855 \| good	0.135 \| good
2026-03-05T22:00:00.000Z	51 \| moderate	5.975 \| good	54.658 \| good	43.634 \| good	0.559 \| good	2.763 \| good	0.144 \| good
2026-03-05T23:00:00.000Z	42 \| good	3.596 \| good	28.779 \| good	45.492 \| good	0.525 \| good	2.822 \| good	0.122 \| good
2026-03-06T00:00:00.000Z	45 \| good	6.673 \| good	49.044 \| good	44.746 \| good	0.481 \| good	6.519 \| good	0.159 \| good
2026-03-06T01:00:00.000Z	41 \| good	4.4 \| good	20.954 \| good	43.709 \| good	0.477 \| good	5.027 \| good	0.179 \| good
2026-03-06T02:00:00.000Z	54 \| moderate	4.202 \| good	62.26 \| fine	40.366 \| good	0.538 \| good	14.121 \| good	0.145 \| good
2026-03-06T03:00:00.000Z	29 \| good	3.899 \| good	17.16 \| good	31.227 \| good	1.31 \| good	23.283 \| good	0.229 \| good
2026-03-06T04:00:00.000Z	37 \| good	3.391 \| good	23.166 \| good	39.785 \| good	0.569 \| good	28.146 \| good	0.271 \| good
2026-03-06T05:00:00.000Z	35 \| good	6.016 \| good	23.22 \| good	37.54 \| good	0.681 \| good	21.359 \| good	0.291 \| good
2026-03-06T06:00:00.000Z	33 \| good	6.459 \| good	22.417 \| good	30.826 \| good	0.474 \| good	28.945 \| good	0.346 \| good
2026-03-06T07:00:00.000Z	27 \| good	5.281 \| good	13.849 \| good	25.537 \| good	0.514 \| good	28.895 \| good	0.346 \| good
2026-03-06T08:00:00.000Z	33 \| good	5.672 \| good	23.846 \| good	21.893 \| good	0.529 \| good	32.181 \| good	0.297 \| good
2026-03-06T09:00:00.000Z	28 \| good	5.112 \| good	14.926 \| good	24.379 \| good	0.649 \| good	29.982 \| good	0.355 \| good
2026-03-06T10:00:00.000Z	29 \| good	5.425 \| good	15.055 \| good	18.115 \| good	0.666 \| good	30.824 \| good	0.343 \| good
2026-03-06T11:00:00.000Z	31 \| good	4.284 \| good	24.538 \| good	23.092 \| good	0.666 \| good	32.673 \| good	0.195 \| good
2026-03-06T12:00:00.000Z	27 \| good	4.872 \| good	19.062 \| good	21.019 \| good	0.649 \| good	26.811 \| good	0.17 \| good
2026-03-06T13:00:00.000Z	25 \| good	4.084 \| good	19.006 \| good	21.253 \| good	0.634 \| good	26.811 \| good	0.17 \| good
2026-03-06T14:00:00.000Z	38 \| good	6.866 \| good	37.009 \| good	31.683 \| good	0.589 \| good	28.054 \| good	0.204 \| good
2026-03-06T15:00:00.000Z	29 \| good	4.902 \| good	25.689 \| good	30.716 \| good	0.648 \| good	14.456 \| good	0.256 \| good
2026-03-06T16:00:00.000Z	29 \| good	4.205 \| good	31.413 \| good	30.138 \| good	0.646 \| good	3.941 \| good	0.264 \| good
2026-03-06T17:00:00.000Z	36 \| good	3.672 \| good	16.648 \| good	39.48 \| good	0.716 \| good	3.368 \| good	0.222 \| good
2026-03-06T18:00:00.000Z	39 \| good	7.106 \| good	31.351 \| good	42.099 \| good	0.636 \| good	4.193 \| good	0.142 \| good
2026-03-06T19:00:00.000Z	41 \| good	4.485 \| good	23.439 \| good	43.535 \| good	0.598 \| good	4.063 \| good	0.135 \| good
2026-03-06T20:00:00.000Z	42 \| good	4.035 \| good	30.64 \| good	45.208 \| good	0.592 \| good	3.892 \| good	0.127 \| good
2026-03-06T21:00:00.000Z	39 \| good	2.405 \| good	25.705 \| good	42.25 \| good	0.559 \| good	2.783 \| good	0.131 \| good
2026-03-06T22:00:00.000Z	43 \| good	3.549 \| good	26.157 \| good	45.862 \| good	0.588 \| good	3.824 \| good	0.127 \| good
2026-03-06T23:00:00.000Z	43 \| good	3.549 \| good	26.157 \| good	45.862 \| good	0.588 \| good	3.824 \| good	0.127 \| good
2026-03-07T00:00:00.000Z	48 \| good	5.587 \| good	24.202 \| good	51.829 \| good	0.459 \| good	2.141 \| good	0.128 \| good
2026-03-07T01:00:00.000Z	39 \| good	7.432 \| good	32.939 \| good	42.201 \| good	0.786 \| good	13.896 \| good	0.187 \| good
2026-03-07T02:00:00.000Z	49 \| good	8.831 \| good	39.103 \| good	29.229 \| good	1.112 \| good	25.65 \| good	0.246 \| good
2026-03-07T03:00:00.000Z	44 \| good	8.39 \| good	37.212 \| good	23.741 \| good	1.438 \| good	37.404 \| good	0.305 \| good
2026-03-07T04:00:00.000Z	34 \| good	5.586 \| good	24.46 \| good	19.035 \| good	1.616 \| good	36.241 \| good	0.332 \| good
2026-03-07T05:00:00.000Z	33 \| good	3.105 \| good	12.439 \| good	18.504 \| good	1.794 \| good	35.079 \| good	0.359 \| good
2026-03-07T06:00:00.000Z	32 \| good	2.25 \| good	9.232 \| good	15.902 \| good	1.972 \| good	33.916 \| good	0.386 \| good
2026-03-07T07:00:00.000Z	29 \| good	2.132 \| good	8.302 \| good	13.041 \| good	1.642 \| good	30.88 \| good	0.348 \| good
2026-03-07T08:00:00.000Z	26 \| good	3.618 \| good	16.103 \| good	12.698 \| good	1.311 \| good	27.845 \| good	0.31 \| good
2026-03-07T09:00:00.000Z	24 \| good	3.507 \| good	15.147 \| good	11.312 \| good	0.981 \| good	24.81 \| good	0.271 \| good
2026-03-07T10:00:00.000Z	22 \| good	3.518 \| good	15.944 \| good	13.219 \| good	0.873 \| good	20.657 \| good	0.24 \| good
2026-03-07T11:00:00.000Z	16 \| good	2.496 \| good	10.213 \| good	14.986 \| good	0.765 \| good	16.505 \| good	0.209 \| good
2026-03-07T12:00:00.000Z	18 \| good	1.737 \| good	7.098 \| good	18.932 \| good	0.658 \| good	12.352 \| good	0.177 \| good
2026-03-07T13:00:00.000Z	17 \| good	1.777 \| good	7.118 \| good	18.231 \| good	0.698 \| good	11.217 \| good	0.173 \| good
2026-03-07T14:00:00.000Z	27 \| good	4.916 \| good	21.116 \| good	18.174 \| good	0.737 \| good	10.082 \| good	0.169 \| good
2026-03-07T15:00:00.000Z	25 \| good	3.449 \| good	15.052 \| good	26.601 \| good	0.777 \| good	8.946 \| good	0.164 \| good
2026-03-07T16:00:00.000Z	34 \| good	0.781 \| good	3.079 \| good	37.155 \| good	0.723 \| good	7.071 \| good	0.157 \| good
2026-03-07T17:00:00.000Z	36 \| good	0.577 \| good	2.023 \| good	38.874 \| good	0.669 \| good	5.196 \| good	0.15 \| good
2026-03-07T18:00:00.000Z	38 \| good	0.766 \| good	3.001 \| good	40.732 \| good	0.615 \| good	3.321 \| good	0.142 \| good
2026-03-07T19:00:00.000Z	38 \| good	1.882 \| good	7.974 \| good	41.389 \| good	0.502 \| good	2.571 \| good	0.137 \| good
2026-03-07T20:00:00.000Z	40 \| good	2.279 \| good	9.097 \| good	42.558 \| good	0.39 \| good	1.821 \| good	0.131 \| good
2026-03-07T21:00:00.000Z	41 \| good	3.459 \| good	14.93 \| good	43.88 \| good	0.277 \| good	1.071 \| good	0.126 \| good
2026-03-07T22:00:00.000Z	43 \| good	2.737 \| good	11.108 \| good	46.328 \| good	0.263 \| good	1.174 \| good	0.124 \| good
2026-03-07T23:00:00.000Z	43 \| good	1.599 \| good	6.084 \| good	46.13 \| good	0.249 \| good	1.277 \| good	0.123 \| good
2026-03-08T00:00:00.000Z	42 \| good	0.534 \| good	2.005 \| good	45.373 \| good	0.235 \| good	1.379 \| good	0.122 \| good
2026-03-08T01:00:00.000Z	37 \| good	0.866 \| good	3.07 \| good	39.581 \| good	0.438 \| good	6.409 \| good	0.145 \| good
2026-03-08T02:00:00.000Z	30 \| good	1.257 \| good	4.981 \| good	32.414 \| good	0.641 \| good	11.438 \| good	0.169 \| good
2026-03-08T03:00:00.000Z	31 \| good	1.622 \| good	6.969 \| good	33.751 \| good	0.844 \| good	16.467 \| good	0.192 \| good
2026-03-08T04:00:00.000Z	28 \| good	1.927 \| good	8.015 \| good	30.354 \| good	1.046 \| good	20.35 \| good	0.203 \| good
2026-03-08T05:00:00.000Z	26 \| good	2.026 \| good	8.15 \| good	27.501 \| good	1.247 \| good	24.233 \| good	0.214 \| good
2026-03-08T06:00:00.000Z	49 \| good	9.083 \| good	10.255 \| good	14.789 \| good	1.453 \| good	28.224 \| good	0.225 \| good
2026-03-08T07:00:00.000Z	24 \| good	2.698 \| good	11.091 \| good	26.051 \| good	1.234 \| good	23.324 \| good	0.208 \| good
2026-03-08T08:00:00.000Z	23 \| good	3.154 \| good	13.971 \| good	24.524 \| good	1.019 \| good	18.533 \| good	0.191 \| good
2026-03-08T09:00:00.000Z	20 \| good	2.649 \| good	11.048 \| good	21.762 \| good	0.805 \| good	13.741 \| good	0.175 \| good
2026-03-08T10:00:00.000Z	19 \| good	3.491 \| good	14.976 \| good	19.962 \| good	0.744 \| good	11.113 \| good	0.161 \| good
2026-03-08T11:00:00.000Z	18 \| good	2.508 \| good	10.172 \| good	19.219 \| good	0.683 \| good	8.485 \| good	0.148 \| good
2026-03-08T12:00:00.000Z	28 \| good	2.834 \| good	3.792 \| good	29.707 \| good	0.623 \| good	5.869 \| good	0.135 \| good
2026-03-08T13:00:00.000Z	28 \| good	2.502 \| good	3.44 \| good	29.577 \| good	0.704 \| good	6.875 \| good	0.141 \| good
2026-03-08T14:00:00.000Z	27 \| good	2.546 \| good	3.453 \| good	29.447 \| good	0.786 \| good	7.881 \| good	0.146 \| good
2026-03-08T15:00:00.000Z	27 \| good	3.583 \| good	4.435 \| good	29.317 \| good	0.867 \| good	8.887 \| good	0.152 \| good
2026-03-08T16:00:00.000Z	31 \| good	5.144 \| good	5.841 \| good	34.308 \| good	0.92 \| good	7.95 \| good	0.153 \| good
2026-03-08T17:00:00.000Z	36 \| good	5.057 \| good	6.037 \| good	39.299 \| good	0.973 \| good	7.013 \| good	0.154 \| good
2026-03-08T18:00:00.000Z	41 \| good	3.867 \| good	5.071 \| good	44.291 \| good	1.026 \| good	6.077 \| good	0.155 \| good
2026-03-08T19:00:00.000Z	45 \| good	2.82 \| good	4.104 \| good	48.975 \| good	0.822 \| good	4.545 \| good	0.144 \| good
2026-03-08T20:00:00.000Z	50 \| good	2.372 \| good	3.688 \| good	53.659 \| good	0.619 \| good	3.014 \| good	0.133 \| good
2026-03-08T21:00:00.000Z	61 \| moderate	2.157 \| good	3.556 \| good	58.342 \| fine	0.415 \| good	1.482 \| good	0.122 \| good
2026-03-08T22:00:00.000Z	61 \| moderate	2.099 \| good	3.607 \| good	57.627 \| fine	0.403 \| good	1.571 \| good	0.121 \| good
2026-03-08T23:00:00.000Z	58 \| moderate	2.142 \| good	3.732 \| good	56.911 \| fine	0.391 \| good	1.659 \| good	0.12 \| good

Ontario

Empower business decisions with accurate air quality data

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

0.14ppm

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

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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 02:00:00, 2026-03-06.

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

The best air quality in Ontario, California was observed at 01:00:00 on 2026-03-06.

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

The air quality in Ontario, California right now is Good, with an AQI of 43.

What pollutant is most frequently found in Ontario, California?

In Ontario, California, O3 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 3.549 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 26.157 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.127 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.588 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 45.862 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 3.824 ppb.

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