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

Ontario, California currently has a PM10 concentration of 17.751 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.917 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 5.708 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 15.458 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 10.866 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)

10.87 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

17.75 μg/m³

155

255

425

605+

Ozone (O₃)

5.71 ppb

201

201+

Sulfur Dioxide (SO₂)

0.92 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

15.46 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.40 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
2026-09-05T12:00:00.000Z	49 \| good	9.413 \| good	23.817 \| good	12.26 \| good	0.547 \| good	17.931 \| good	0.423 \| good
2026-09-05T13:00:00.000Z	49 \| good	9.255 \| good	22.772 \| good	12.445 \| good	0.548 \| good	17.931 \| good	0.423 \| good
2026-09-05T14:00:00.000Z	52 \| moderate	10.422 \| good	35.987 \| good	13.445 \| good	0.656 \| good	19.978 \| good	0.548 \| good
2026-09-05T15:00:00.000Z	61 \| moderate	12.588 \| fine	76.113 \| fine	15.037 \| good	0.927 \| good	22.565 \| good	0.54 \| good
2026-09-05T16:00:00.000Z	54 \| moderate	10.479 \| good	61.081 \| fine	20.194 \| good	0.801 \| good	24.578 \| good	0.447 \| good
2026-09-05T17:00:00.000Z	49 \| good	8.773 \| good	37.249 \| good	27.181 \| good	0.688 \| good	21.237 \| good	0.361 \| good
2026-09-05T18:00:00.000Z	34 \| good	6.434 \| good	26.387 \| good	36.966 \| good	0.618 \| good	15.535 \| good	0.338 \| good
2026-09-05T19:00:00.000Z	40 \| good	5.683 \| good	21.526 \| good	43.264 \| good	0.578 \| good	10.674 \| good	0.302 \| good
2026-09-05T20:00:00.000Z	42 \| good	5.233 \| good	18.661 \| good	45.411 \| good	0.57 \| good	7.623 \| good	0.242 \| good
2026-09-05T21:00:00.000Z	47 \| good	5.391 \| good	21.907 \| good	51.298 \| good	0.596 \| good	7.523 \| good	0.264 \| good
2026-09-05T22:00:00.000Z	47 \| good	5.528 \| good	17.569 \| good	51.424 \| good	0.516 \| good	8.265 \| good	0.242 \| good
2026-09-05T23:00:00.000Z	48 \| good	2.828 \| good	17.717 \| good	52.292 \| good	0.648 \| good	11.051 \| good	0.256 \| good
2026-09-06T00:00:00.000Z	49 \| good	3.024 \| good	19.878 \| good	52.62 \| good	0.671 \| good	11.882 \| good	0.28 \| good
2026-09-06T01:00:00.000Z	43 \| good	3.394 \| good	18.009 \| good	46.099 \| good	0.631 \| good	12.106 \| good	0.309 \| good
2026-09-06T02:00:00.000Z	44 \| good	5.246 \| good	22.124 \| good	47.433 \| good	0.654 \| good	13.429 \| good	0.331 \| good
2026-09-06T03:00:00.000Z	33 \| good	6 \| good	26.39 \| good	29.495 \| good	0.759 \| good	4.83 \| good	0.127 \| good
2026-09-06T04:00:00.000Z	34 \| good	5.58 \| good	19.01 \| good	37.415 \| good	0.562 \| good	12.538 \| good	0.344 \| good
2026-09-06T05:00:00.000Z	33 \| good	5.75 \| good	22.12 \| good	32.695 \| good	0.828 \| good	13.892 \| good	0.421 \| good
2026-09-06T06:00:00.000Z	38 \| good	6.66 \| good	19.377 \| good	29.49 \| good	0.631 \| good	17.125 \| good	0.435 \| good
2026-09-06T07:00:00.000Z	38 \| good	6.979 \| good	26.352 \| good	28.288 \| good	0.621 \| good	17.125 \| good	0.44 \| good
2026-09-06T08:00:00.000Z	49 \| good	8.865 \| good	27.85 \| good	20.079 \| good	0.658 \| good	19.867 \| good	0.499 \| good
2026-09-06T09:00:00.000Z	52 \| moderate	9.579 \| good	29.652 \| good	16.665 \| good	0.743 \| good	19.154 \| good	0.456 \| good
2026-09-06T10:00:00.000Z	52 \| moderate	9.78 \| good	35.348 \| good	18.956 \| good	0.744 \| good	19.154 \| good	0.456 \| good
2026-09-06T11:00:00.000Z	49 \| good	9.442 \| good	35.666 \| good	16.869 \| good	0.744 \| good	19.154 \| good	0.456 \| good
2026-09-06T12:00:00.000Z	49 \| good	9.489 \| good	30.85 \| good	11.763 \| good	0.593 \| good	21.765 \| good	0.419 \| good
2026-09-06T13:00:00.000Z	49 \| good	8.88 \| good	26.297 \| good	12.223 \| good	0.591 \| good	21.765 \| good	0.419 \| good
2026-09-06T14:00:00.000Z	52 \| moderate	9.645 \| good	35.72 \| good	15.194 \| good	0.614 \| good	19.278 \| good	0.395 \| good
2026-09-06T15:00:00.000Z	49 \| good	9.239 \| good	26.643 \| good	11.998 \| good	0.623 \| good	17.861 \| good	0.349 \| good
2026-09-06T16:00:00.000Z	44 \| good	8.187 \| good	27.198 \| good	11.856 \| good	0.561 \| good	14.485 \| good	0.34 \| good
2026-09-06T17:00:00.000Z	38 \| good	7.409 \| good	20.203 \| good	17.517 \| good	0.631 \| good	18.244 \| good	0.375 \| good
2026-09-06T18:00:00.000Z	44 \| good	8.283 \| good	17.799 \| good	17.115 \| good	0.577 \| good	16.805 \| good	0.371 \| good
2026-09-06T19:00:00.000Z	49 \| good	8.852 \| good	21.999 \| good	16.692 \| good	0.543 \| good	19.522 \| good	0.313 \| good
2026-09-06T20:00:00.000Z	49 \| good	8.646 \| good	29.673 \| good	17.452 \| good	0.538 \| good	20.263 \| good	0.317 \| good
2026-09-06T21:00:00.000Z	49 \| good	8.52 \| good	15.486 \| good	17.66 \| good	0.546 \| good	20.056 \| good	0.244 \| good
2026-09-06T22:00:00.000Z	49 \| good	8.709 \| good	19.321 \| good	17.615 \| good	0.543 \| good	15.293 \| good	0.244 \| good
2026-09-06T23:00:00.000Z	52 \| moderate	9.629 \| good	27.862 \| good	16.794 \| good	0.596 \| good	11.936 \| good	0.272 \| good
2026-09-07T00:00:00.000Z	49 \| good	9.413 \| good	20.168 \| good	14.676 \| good	0.624 \| good	9.185 \| good	0.275 \| good
2026-09-07T01:00:00.000Z	52 \| moderate	9.978 \| good	22.654 \| good	11.929 \| good	0.626 \| good	14.139 \| good	0.335 \| good
2026-09-07T02:00:00.000Z	52 \| moderate	10.134 \| good	18.167 \| good	11.164 \| good	0.563 \| good	16.066 \| good	0.342 \| good
2026-09-07T03:00:00.000Z	38 \| good	6.817 \| good	30.313 \| good	17.163 \| good	0.401 \| good	15.5 \| good	0.166 \| good
2026-09-07T04:00:00.000Z	52 \| moderate	10.282 \| good	18.803 \| good	6.899 \| good	0.576 \| good	16.951 \| good	0.457 \| good
2026-09-07T05:00:00.000Z	54 \| moderate	10.991 \| good	19.817 \| good	5.075 \| good	0.836 \| good	18.589 \| good	0.523 \| good
2026-09-07T06:00:00.000Z	49 \| good	9.499 \| good	21.704 \| good	5.513 \| good	0.729 \| good	18.566 \| good	0.573 \| good
2026-09-07T07:00:00.000Z	52 \| moderate	10.499 \| good	19.929 \| good	5.831 \| good	0.727 \| good	18.566 \| good	0.565 \| good
2026-09-07T08:00:00.000Z	52 \| moderate	10.252 \| good	20.449 \| good	6.055 \| good	0.733 \| good	16.276 \| good	0.515 \| good
2026-09-07T09:00:00.000Z	54 \| moderate	10.849 \| good	26.194 \| good	4.908 \| good	0.788 \| good	14.75 \| good	0.492 \| good
2026-09-07T10:00:00.000Z	52 \| moderate	9.816 \| good	19.499 \| good	5.38 \| good	0.667 \| good	13.534 \| good	0.402 \| good
2026-09-07T11:00:00.000Z	52 \| moderate	10 \| good	17.667 \| good	5.854 \| good	0.915 \| good	13.164 \| good	0.395 \| good
2026-09-07T11:00:00.000Z	54 \| moderate	10.866 \| good	17.751 \| good	5.708 \| good	0.917 \| good	15.458 \| good	0.396 \| good
2026-09-07T12:00:00.000Z	52 \| moderate	9.703 \| good	43.278 \| good	6.13 \| good	0.314 \| good	16.836 \| good	0.205 \| good
2026-09-07T13:00:00.000Z	49 \| good	8.911 \| good	39.506 \| good	4.907 \| good	0.311 \| good	16.54 \| good	0.202 \| good
2026-09-07T14:00:00.000Z	52 \| moderate	9.851 \| good	43.565 \| good	4.189 \| good	0.343 \| good	14.657 \| good	0.204 \| good
2026-09-07T15:00:00.000Z	49 \| good	8.754 \| good	38.694 \| good	8.96 \| good	0.422 \| good	12.828 \| good	0.213 \| good
2026-09-07T16:00:00.000Z	44 \| good	8.252 \| good	36.626 \| good	16.935 \| good	0.43 \| good	8.146 \| good	0.163 \| good
2026-09-07T17:00:00.000Z	52 \| moderate	9.72 \| good	42.822 \| good	26.613 \| good	0.37 \| good	4.368 \| good	0.126 \| good
2026-09-07T18:00:00.000Z	52 \| moderate	9.638 \| good	42.843 \| good	34.653 \| good	0.365 \| good	2.91 \| good	0.116 \| good
2026-09-07T19:00:00.000Z	54 \| moderate	10.504 \| good	46.157 \| good	45.239 \| good	0.392 \| good	2.403 \| good	0.114 \| good
2026-09-07T20:00:00.000Z	56 \| moderate	11.753 \| good	52.394 \| good	55.442 \| fine	0.448 \| good	2.207 \| good	0.113 \| good
2026-09-07T21:00:00.000Z	74 \| moderate	6.959 \| good	31.098 \| good	62.075 \| fine	0.528 \| good	2.055 \| good	0.113 \| good
2026-09-07T22:00:00.000Z	100 \| moderate	7.485 \| good	33.337 \| good	69.623 \| fine	0.619 \| good	1.998 \| good	0.113 \| good
2026-09-07T23:00:00.000Z	101 \| sensitive	8.795 \| good	38.674 \| good	70.892 \| fine	0.771 \| good	2.14 \| good	0.115 \| good
2026-09-08T00:00:00.000Z	64 \| moderate	7.821 \| good	34.101 \| good	58.873 \| fine	0.911 \| good	2.609 \| good	0.118 \| good
2026-09-08T01:00:00.000Z	40 \| good	7.146 \| good	31.817 \| good	43.432 \| good	1.08 \| good	3.886 \| good	0.125 \| good
2026-09-08T02:00:00.000Z	49 \| good	8.509 \| good	37.128 \| good	27.128 \| good	1.272 \| good	7.323 \| good	0.139 \| good
2026-09-08T03:00:00.000Z	38 \| good	6.841 \| good	30.416 \| good	21.313 \| good	1.437 \| good	12.687 \| good	0.161 \| good
2026-09-08T04:00:00.000Z	38 \| good	7.14 \| good	31.762 \| good	13.467 \| good	1.578 \| good	17.677 \| good	0.181 \| good
2026-09-08T05:00:00.000Z	38 \| good	7.126 \| good	31.692 \| good	9.06 \| good	1.677 \| good	21.944 \| good	0.198 \| good
2026-09-08T06:00:00.000Z	38 \| good	7.21 \| good	31.733 \| good	7.504 \| good	1.752 \| good	25.722 \| good	0.214 \| good
2026-09-08T07:00:00.000Z	38 \| good	6.588 \| good	29.405 \| good	6.181 \| good	1.758 \| good	28.527 \| good	0.229 \| good
2026-09-08T08:00:00.000Z	38 \| good	6.639 \| good	29.132 \| good	5.83 \| good	1.679 \| good	30.15 \| good	0.239 \| good
2026-09-08T09:00:00.000Z	38 \| good	7.135 \| good	31.069 \| good	5.33 \| good	1.558 \| good	29.839 \| good	0.24 \| good
2026-09-08T10:00:00.000Z	44 \| good	8.31 \| good	36.28 \| good	4.34 \| good	1.421 \| good	28.164 \| good	0.236 \| good
2026-09-08T11:00:00.000Z	49 \| good	9.087 \| good	40.658 \| good	3.977 \| good	1.291 \| good	26.032 \| good	0.229 \| good
2026-09-08T12:00:00.000Z	52 \| moderate	10.129 \| good	44.759 \| good	3.999 \| good	1.155 \| good	24.019 \| good	0.223 \| good
2026-09-08T13:00:00.000Z	54 \| moderate	10.642 \| good	46.834 \| good	3.949 \| good	1.011 \| good	22.66 \| good	0.22 \| good
2026-09-08T14:00:00.000Z	58 \| moderate	13.028 \| fine	58.976 \| fine	4.489 \| good	0.9 \| good	19.053 \| good	0.225 \| good
2026-09-08T15:00:00.000Z	62 \| moderate	14.691 \| fine	66.119 \| fine	7.919 \| good	0.849 \| good	15.098 \| good	0.234 \| good
2026-09-08T16:00:00.000Z	66 \| moderate	16.743 \| fine	74.492 \| fine	17.569 \| good	0.833 \| good	9.988 \| good	0.179 \| good
2026-09-08T17:00:00.000Z	73 \| moderate	20.657 \| fine	90.836 \| fine	32.674 \| good	0.844 \| good	7.627 \| good	0.154 \| good
2026-09-08T18:00:00.000Z	73 \| moderate	20.754 \| fine	90.743 \| fine	44.596 \| good	0.903 \| good	6.475 \| good	0.15 \| good
2026-09-08T19:00:00.000Z	67 \| moderate	17.855 \| fine	79.023 \| fine	52.572 \| good	0.952 \| good	5.312 \| good	0.147 \| good
2026-09-08T20:00:00.000Z	74 \| moderate	9.485 \| good	42.419 \| good	61.885 \| fine	0.99 \| good	4.363 \| good	0.144 \| good
2026-09-08T21:00:00.000Z	108 \| sensitive	10.37 \| good	46.222 \| good	72.672 \| moderate	1.022 \| good	3.695 \| good	0.143 \| good
2026-09-08T22:00:00.000Z	150 \| sensitive	10.148 \| good	44.761 \| good	84.75 \| moderate	1.059 \| good	3.34 \| good	0.142 \| good
2026-09-08T23:00:00.000Z	154 \| unhealthy	10.305 \| good	45.371 \| good	87.497 \| poor	1.157 \| good	3.478 \| good	0.143 \| good
2026-09-09T00:00:00.000Z	143 \| sensitive	11.489 \| good	51.077 \| good	83.209 \| moderate	1.263 \| good	4.116 \| good	0.145 \| good
2026-09-09T01:00:00.000Z	97 \| moderate	10.477 \| good	46.727 \| good	68.558 \| fine	1.303 \| good	5.596 \| good	0.148 \| good
2026-09-09T02:00:00.000Z	56 \| moderate	11.718 \| good	51.751 \| good	42.434 \| good	1.325 \| good	9.929 \| good	0.164 \| good
2026-09-09T03:00:00.000Z	38 \| good	7.044 \| good	31.413 \| good	33.825 \| good	1.344 \| good	15.204 \| good	0.186 \| good
2026-09-09T04:00:00.000Z	44 \| good	7.75 \| good	34.007 \| good	20.891 \| good	1.37 \| good	20.524 \| good	0.207 \| good
2026-09-09T05:00:00.000Z	44 \| good	8.487 \| good	37.118 \| good	13.741 \| good	1.404 \| good	24.326 \| good	0.226 \| good
2026-09-09T06:00:00.000Z	44 \| good	8.014 \| good	34.953 \| good	10.383 \| good	1.365 \| good	26.334 \| good	0.24 \| good
2026-09-09T07:00:00.000Z	49 \| good	9.322 \| good	41.765 \| good	10.695 \| good	1.3 \| good	26.592 \| good	0.249 \| good
2026-09-09T08:00:00.000Z	49 \| good	8.979 \| good	40.002 \| good	9.317 \| good	1.234 \| good	25.792 \| good	0.251 \| good
2026-09-09T09:00:00.000Z	44 \| good	8.218 \| good	36 \| good	9.601 \| good	1.175 \| good	25.516 \| good	0.252 \| good
2026-09-09T10:00:00.000Z	49 \| good	8.792 \| good	39.269 \| good	9.263 \| good	1.075 \| good	25.313 \| good	0.253 \| good
2026-09-09T11:00:00.000Z	52 \| moderate	9.728 \| good	43.197 \| good	8.813 \| good	0.945 \| good	24.703 \| good	0.253 \| good

Ontario

Empower business decisions with accurate air quality data

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

0.40ppm

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 09:00:00, 2026-09-07.

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

The best air quality in Ontario, California was observed at 03:00:00 on 2026-09-07.

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

The air quality in Ontario, California right now is Moderate, with an AQI of 54.

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 10.866 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 17.751 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.396 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.917 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 5.708 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 15.458 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-05T12:00:00.000Z	49 \| good	9.413 \| good	23.817 \| good	12.26 \| good	0.547 \| good	17.931 \| good	0.423 \| good
2026-09-05T13:00:00.000Z	49 \| good	9.255 \| good	22.772 \| good	12.445 \| good	0.548 \| good	17.931 \| good	0.423 \| good
2026-09-05T14:00:00.000Z	52 \| moderate	10.422 \| good	35.987 \| good	13.445 \| good	0.656 \| good	19.978 \| good	0.548 \| good
2026-09-05T15:00:00.000Z	61 \| moderate	12.588 \| fine	76.113 \| fine	15.037 \| good	0.927 \| good	22.565 \| good	0.54 \| good
2026-09-05T16:00:00.000Z	54 \| moderate	10.479 \| good	61.081 \| fine	20.194 \| good	0.801 \| good	24.578 \| good	0.447 \| good
2026-09-05T17:00:00.000Z	49 \| good	8.773 \| good	37.249 \| good	27.181 \| good	0.688 \| good	21.237 \| good	0.361 \| good
2026-09-05T18:00:00.000Z	34 \| good	6.434 \| good	26.387 \| good	36.966 \| good	0.618 \| good	15.535 \| good	0.338 \| good
2026-09-05T19:00:00.000Z	40 \| good	5.683 \| good	21.526 \| good	43.264 \| good	0.578 \| good	10.674 \| good	0.302 \| good
2026-09-05T20:00:00.000Z	42 \| good	5.233 \| good	18.661 \| good	45.411 \| good	0.57 \| good	7.623 \| good	0.242 \| good
2026-09-05T21:00:00.000Z	47 \| good	5.391 \| good	21.907 \| good	51.298 \| good	0.596 \| good	7.523 \| good	0.264 \| good
2026-09-05T22:00:00.000Z	47 \| good	5.528 \| good	17.569 \| good	51.424 \| good	0.516 \| good	8.265 \| good	0.242 \| good
2026-09-05T23:00:00.000Z	48 \| good	2.828 \| good	17.717 \| good	52.292 \| good	0.648 \| good	11.051 \| good	0.256 \| good
2026-09-06T00:00:00.000Z	49 \| good	3.024 \| good	19.878 \| good	52.62 \| good	0.671 \| good	11.882 \| good	0.28 \| good
2026-09-06T01:00:00.000Z	43 \| good	3.394 \| good	18.009 \| good	46.099 \| good	0.631 \| good	12.106 \| good	0.309 \| good
2026-09-06T02:00:00.000Z	44 \| good	5.246 \| good	22.124 \| good	47.433 \| good	0.654 \| good	13.429 \| good	0.331 \| good
2026-09-06T03:00:00.000Z	33 \| good	6 \| good	26.39 \| good	29.495 \| good	0.759 \| good	4.83 \| good	0.127 \| good
2026-09-06T04:00:00.000Z	34 \| good	5.58 \| good	19.01 \| good	37.415 \| good	0.562 \| good	12.538 \| good	0.344 \| good
2026-09-06T05:00:00.000Z	33 \| good	5.75 \| good	22.12 \| good	32.695 \| good	0.828 \| good	13.892 \| good	0.421 \| good
2026-09-06T06:00:00.000Z	38 \| good	6.66 \| good	19.377 \| good	29.49 \| good	0.631 \| good	17.125 \| good	0.435 \| good
2026-09-06T07:00:00.000Z	38 \| good	6.979 \| good	26.352 \| good	28.288 \| good	0.621 \| good	17.125 \| good	0.44 \| good
2026-09-06T08:00:00.000Z	49 \| good	8.865 \| good	27.85 \| good	20.079 \| good	0.658 \| good	19.867 \| good	0.499 \| good
2026-09-06T09:00:00.000Z	52 \| moderate	9.579 \| good	29.652 \| good	16.665 \| good	0.743 \| good	19.154 \| good	0.456 \| good
2026-09-06T10:00:00.000Z	52 \| moderate	9.78 \| good	35.348 \| good	18.956 \| good	0.744 \| good	19.154 \| good	0.456 \| good
2026-09-06T11:00:00.000Z	49 \| good	9.442 \| good	35.666 \| good	16.869 \| good	0.744 \| good	19.154 \| good	0.456 \| good
2026-09-06T12:00:00.000Z	49 \| good	9.489 \| good	30.85 \| good	11.763 \| good	0.593 \| good	21.765 \| good	0.419 \| good
2026-09-06T13:00:00.000Z	49 \| good	8.88 \| good	26.297 \| good	12.223 \| good	0.591 \| good	21.765 \| good	0.419 \| good
2026-09-06T14:00:00.000Z	52 \| moderate	9.645 \| good	35.72 \| good	15.194 \| good	0.614 \| good	19.278 \| good	0.395 \| good
2026-09-06T15:00:00.000Z	49 \| good	9.239 \| good	26.643 \| good	11.998 \| good	0.623 \| good	17.861 \| good	0.349 \| good
2026-09-06T16:00:00.000Z	44 \| good	8.187 \| good	27.198 \| good	11.856 \| good	0.561 \| good	14.485 \| good	0.34 \| good
2026-09-06T17:00:00.000Z	38 \| good	7.409 \| good	20.203 \| good	17.517 \| good	0.631 \| good	18.244 \| good	0.375 \| good
2026-09-06T18:00:00.000Z	44 \| good	8.283 \| good	17.799 \| good	17.115 \| good	0.577 \| good	16.805 \| good	0.371 \| good
2026-09-06T19:00:00.000Z	49 \| good	8.852 \| good	21.999 \| good	16.692 \| good	0.543 \| good	19.522 \| good	0.313 \| good
2026-09-06T20:00:00.000Z	49 \| good	8.646 \| good	29.673 \| good	17.452 \| good	0.538 \| good	20.263 \| good	0.317 \| good
2026-09-06T21:00:00.000Z	49 \| good	8.52 \| good	15.486 \| good	17.66 \| good	0.546 \| good	20.056 \| good	0.244 \| good
2026-09-06T22:00:00.000Z	49 \| good	8.709 \| good	19.321 \| good	17.615 \| good	0.543 \| good	15.293 \| good	0.244 \| good
2026-09-06T23:00:00.000Z	52 \| moderate	9.629 \| good	27.862 \| good	16.794 \| good	0.596 \| good	11.936 \| good	0.272 \| good
2026-09-07T00:00:00.000Z	49 \| good	9.413 \| good	20.168 \| good	14.676 \| good	0.624 \| good	9.185 \| good	0.275 \| good
2026-09-07T01:00:00.000Z	52 \| moderate	9.978 \| good	22.654 \| good	11.929 \| good	0.626 \| good	14.139 \| good	0.335 \| good
2026-09-07T02:00:00.000Z	52 \| moderate	10.134 \| good	18.167 \| good	11.164 \| good	0.563 \| good	16.066 \| good	0.342 \| good
2026-09-07T03:00:00.000Z	38 \| good	6.817 \| good	30.313 \| good	17.163 \| good	0.401 \| good	15.5 \| good	0.166 \| good
2026-09-07T04:00:00.000Z	52 \| moderate	10.282 \| good	18.803 \| good	6.899 \| good	0.576 \| good	16.951 \| good	0.457 \| good
2026-09-07T05:00:00.000Z	54 \| moderate	10.991 \| good	19.817 \| good	5.075 \| good	0.836 \| good	18.589 \| good	0.523 \| good
2026-09-07T06:00:00.000Z	49 \| good	9.499 \| good	21.704 \| good	5.513 \| good	0.729 \| good	18.566 \| good	0.573 \| good
2026-09-07T07:00:00.000Z	52 \| moderate	10.499 \| good	19.929 \| good	5.831 \| good	0.727 \| good	18.566 \| good	0.565 \| good
2026-09-07T08:00:00.000Z	52 \| moderate	10.252 \| good	20.449 \| good	6.055 \| good	0.733 \| good	16.276 \| good	0.515 \| good
2026-09-07T09:00:00.000Z	54 \| moderate	10.849 \| good	26.194 \| good	4.908 \| good	0.788 \| good	14.75 \| good	0.492 \| good
2026-09-07T10:00:00.000Z	52 \| moderate	9.816 \| good	19.499 \| good	5.38 \| good	0.667 \| good	13.534 \| good	0.402 \| good
2026-09-07T11:00:00.000Z	52 \| moderate	10 \| good	17.667 \| good	5.854 \| good	0.915 \| good	13.164 \| good	0.395 \| good
2026-09-07T11:00:00.000Z	54 \| moderate	10.866 \| good	17.751 \| good	5.708 \| good	0.917 \| good	15.458 \| good	0.396 \| good
2026-09-07T12:00:00.000Z	52 \| moderate	9.703 \| good	43.278 \| good	6.13 \| good	0.314 \| good	16.836 \| good	0.205 \| good
2026-09-07T13:00:00.000Z	49 \| good	8.911 \| good	39.506 \| good	4.907 \| good	0.311 \| good	16.54 \| good	0.202 \| good
2026-09-07T14:00:00.000Z	52 \| moderate	9.851 \| good	43.565 \| good	4.189 \| good	0.343 \| good	14.657 \| good	0.204 \| good
2026-09-07T15:00:00.000Z	49 \| good	8.754 \| good	38.694 \| good	8.96 \| good	0.422 \| good	12.828 \| good	0.213 \| good
2026-09-07T16:00:00.000Z	44 \| good	8.252 \| good	36.626 \| good	16.935 \| good	0.43 \| good	8.146 \| good	0.163 \| good
2026-09-07T17:00:00.000Z	52 \| moderate	9.72 \| good	42.822 \| good	26.613 \| good	0.37 \| good	4.368 \| good	0.126 \| good
2026-09-07T18:00:00.000Z	52 \| moderate	9.638 \| good	42.843 \| good	34.653 \| good	0.365 \| good	2.91 \| good	0.116 \| good
2026-09-07T19:00:00.000Z	54 \| moderate	10.504 \| good	46.157 \| good	45.239 \| good	0.392 \| good	2.403 \| good	0.114 \| good
2026-09-07T20:00:00.000Z	56 \| moderate	11.753 \| good	52.394 \| good	55.442 \| fine	0.448 \| good	2.207 \| good	0.113 \| good
2026-09-07T21:00:00.000Z	74 \| moderate	6.959 \| good	31.098 \| good	62.075 \| fine	0.528 \| good	2.055 \| good	0.113 \| good
2026-09-07T22:00:00.000Z	100 \| moderate	7.485 \| good	33.337 \| good	69.623 \| fine	0.619 \| good	1.998 \| good	0.113 \| good
2026-09-07T23:00:00.000Z	101 \| sensitive	8.795 \| good	38.674 \| good	70.892 \| fine	0.771 \| good	2.14 \| good	0.115 \| good
2026-09-08T00:00:00.000Z	64 \| moderate	7.821 \| good	34.101 \| good	58.873 \| fine	0.911 \| good	2.609 \| good	0.118 \| good
2026-09-08T01:00:00.000Z	40 \| good	7.146 \| good	31.817 \| good	43.432 \| good	1.08 \| good	3.886 \| good	0.125 \| good
2026-09-08T02:00:00.000Z	49 \| good	8.509 \| good	37.128 \| good	27.128 \| good	1.272 \| good	7.323 \| good	0.139 \| good
2026-09-08T03:00:00.000Z	38 \| good	6.841 \| good	30.416 \| good	21.313 \| good	1.437 \| good	12.687 \| good	0.161 \| good
2026-09-08T04:00:00.000Z	38 \| good	7.14 \| good	31.762 \| good	13.467 \| good	1.578 \| good	17.677 \| good	0.181 \| good
2026-09-08T05:00:00.000Z	38 \| good	7.126 \| good	31.692 \| good	9.06 \| good	1.677 \| good	21.944 \| good	0.198 \| good
2026-09-08T06:00:00.000Z	38 \| good	7.21 \| good	31.733 \| good	7.504 \| good	1.752 \| good	25.722 \| good	0.214 \| good
2026-09-08T07:00:00.000Z	38 \| good	6.588 \| good	29.405 \| good	6.181 \| good	1.758 \| good	28.527 \| good	0.229 \| good
2026-09-08T08:00:00.000Z	38 \| good	6.639 \| good	29.132 \| good	5.83 \| good	1.679 \| good	30.15 \| good	0.239 \| good
2026-09-08T09:00:00.000Z	38 \| good	7.135 \| good	31.069 \| good	5.33 \| good	1.558 \| good	29.839 \| good	0.24 \| good
2026-09-08T10:00:00.000Z	44 \| good	8.31 \| good	36.28 \| good	4.34 \| good	1.421 \| good	28.164 \| good	0.236 \| good
2026-09-08T11:00:00.000Z	49 \| good	9.087 \| good	40.658 \| good	3.977 \| good	1.291 \| good	26.032 \| good	0.229 \| good
2026-09-08T12:00:00.000Z	52 \| moderate	10.129 \| good	44.759 \| good	3.999 \| good	1.155 \| good	24.019 \| good	0.223 \| good
2026-09-08T13:00:00.000Z	54 \| moderate	10.642 \| good	46.834 \| good	3.949 \| good	1.011 \| good	22.66 \| good	0.22 \| good
2026-09-08T14:00:00.000Z	58 \| moderate	13.028 \| fine	58.976 \| fine	4.489 \| good	0.9 \| good	19.053 \| good	0.225 \| good
2026-09-08T15:00:00.000Z	62 \| moderate	14.691 \| fine	66.119 \| fine	7.919 \| good	0.849 \| good	15.098 \| good	0.234 \| good
2026-09-08T16:00:00.000Z	66 \| moderate	16.743 \| fine	74.492 \| fine	17.569 \| good	0.833 \| good	9.988 \| good	0.179 \| good
2026-09-08T17:00:00.000Z	73 \| moderate	20.657 \| fine	90.836 \| fine	32.674 \| good	0.844 \| good	7.627 \| good	0.154 \| good
2026-09-08T18:00:00.000Z	73 \| moderate	20.754 \| fine	90.743 \| fine	44.596 \| good	0.903 \| good	6.475 \| good	0.15 \| good
2026-09-08T19:00:00.000Z	67 \| moderate	17.855 \| fine	79.023 \| fine	52.572 \| good	0.952 \| good	5.312 \| good	0.147 \| good
2026-09-08T20:00:00.000Z	74 \| moderate	9.485 \| good	42.419 \| good	61.885 \| fine	0.99 \| good	4.363 \| good	0.144 \| good
2026-09-08T21:00:00.000Z	108 \| sensitive	10.37 \| good	46.222 \| good	72.672 \| moderate	1.022 \| good	3.695 \| good	0.143 \| good
2026-09-08T22:00:00.000Z	150 \| sensitive	10.148 \| good	44.761 \| good	84.75 \| moderate	1.059 \| good	3.34 \| good	0.142 \| good
2026-09-08T23:00:00.000Z	154 \| unhealthy	10.305 \| good	45.371 \| good	87.497 \| poor	1.157 \| good	3.478 \| good	0.143 \| good
2026-09-09T00:00:00.000Z	143 \| sensitive	11.489 \| good	51.077 \| good	83.209 \| moderate	1.263 \| good	4.116 \| good	0.145 \| good
2026-09-09T01:00:00.000Z	97 \| moderate	10.477 \| good	46.727 \| good	68.558 \| fine	1.303 \| good	5.596 \| good	0.148 \| good
2026-09-09T02:00:00.000Z	56 \| moderate	11.718 \| good	51.751 \| good	42.434 \| good	1.325 \| good	9.929 \| good	0.164 \| good
2026-09-09T03:00:00.000Z	38 \| good	7.044 \| good	31.413 \| good	33.825 \| good	1.344 \| good	15.204 \| good	0.186 \| good
2026-09-09T04:00:00.000Z	44 \| good	7.75 \| good	34.007 \| good	20.891 \| good	1.37 \| good	20.524 \| good	0.207 \| good
2026-09-09T05:00:00.000Z	44 \| good	8.487 \| good	37.118 \| good	13.741 \| good	1.404 \| good	24.326 \| good	0.226 \| good
2026-09-09T06:00:00.000Z	44 \| good	8.014 \| good	34.953 \| good	10.383 \| good	1.365 \| good	26.334 \| good	0.24 \| good
2026-09-09T07:00:00.000Z	49 \| good	9.322 \| good	41.765 \| good	10.695 \| good	1.3 \| good	26.592 \| good	0.249 \| good
2026-09-09T08:00:00.000Z	49 \| good	8.979 \| good	40.002 \| good	9.317 \| good	1.234 \| good	25.792 \| good	0.251 \| good
2026-09-09T09:00:00.000Z	44 \| good	8.218 \| good	36 \| good	9.601 \| good	1.175 \| good	25.516 \| good	0.252 \| good
2026-09-09T10:00:00.000Z	49 \| good	8.792 \| good	39.269 \| good	9.263 \| good	1.075 \| good	25.313 \| good	0.253 \| good
2026-09-09T11:00:00.000Z	52 \| moderate	9.728 \| good	43.197 \| good	8.813 \| good	0.945 \| good	24.703 \| good	0.253 \| 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?