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

Ontario, California currently has a PM10 concentration of 26.22 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.767 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 40.701 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 11.273 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 6.331 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)

6.33 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

26.22 μg/m³

155

255

425

605+

Ozone (O₃)

40.70 ppb

201

201+

Sulfur Dioxide (SO₂)

0.77 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

11.27 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.22 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
2026-03-07T21:00:00.000Z	39 \| good	5.572 \| good	25.06 \| good	41.993 \| good	0.618 \| good	1.799 \| good	0.112 \| good
2026-03-07T22:00:00.000Z	40 \| good	3.058 \| good	25.073 \| good	43.286 \| good	0.567 \| good	1.587 \| good	0.112 \| good
2026-03-07T23:00:00.000Z	40 \| good	2.99 \| good	27.028 \| good	42.864 \| good	0.599 \| good	1.755 \| good	0.112 \| good
2026-03-08T00:00:00.000Z	39 \| good	3.485 \| good	20.226 \| good	41.679 \| good	0.564 \| good	1.746 \| good	0.112 \| good
2026-03-08T01:00:00.000Z	39 \| good	3.035 \| good	19.414 \| good	41.569 \| good	0.594 \| good	1.879 \| good	0.112 \| good
2026-03-08T02:00:00.000Z	37 \| good	2.854 \| good	22.771 \| good	39.956 \| good	0.558 \| good	2.352 \| good	0.12 \| good
2026-03-08T03:00:00.000Z	30 \| good	2.712 \| good	10.967 \| good	31.507 \| good	0.725 \| good	11.107 \| good	0.173 \| good
2026-03-08T04:00:00.000Z	35 \| good	3.533 \| good	13.818 \| good	38.323 \| good	0.581 \| good	3.958 \| good	0.162 \| good
2026-03-08T05:00:00.000Z	34 \| good	4.104 \| good	16.442 \| good	36.922 \| good	0.703 \| good	3.844 \| good	0.218 \| good
2026-03-08T06:00:00.000Z	36 \| good	5.269 \| good	17.755 \| good	39.33 \| good	0.559 \| good	2.932 \| good	0.256 \| good
2026-03-08T07:00:00.000Z	32 \| good	4.439 \| good	14.292 \| good	34.775 \| good	0.568 \| good	2.945 \| good	0.256 \| good
2026-03-08T08:00:00.000Z	37 \| good	3.712 \| good	20.366 \| good	39.737 \| good	0.568 \| good	2.323 \| good	0.201 \| good
2026-03-08T09:00:00.000Z	38 \| good	3.023 \| good	17.96 \| good	41.048 \| good	0.594 \| good	1.926 \| good	0.182 \| good
2026-03-08T10:00:00.000Z	37 \| good	3.245 \| good	19.728 \| good	39.975 \| good	0.594 \| good	1.935 \| good	0.182 \| good
2026-03-08T11:00:00.000Z	42 \| good	3.289 \| good	44.932 \| good	38.363 \| good	0.599 \| good	1.749 \| good	0.181 \| good
2026-03-08T12:00:00.000Z	43 \| good	3.854 \| good	46.011 \| good	34.551 \| good	0.438 \| good	9.28 \| good	0.407 \| good
2026-03-08T13:00:00.000Z	34 \| good	1.858 \| good	11.866 \| good	37.432 \| good	0.597 \| good	8.587 \| good	0.407 \| good
2026-03-08T14:00:00.000Z	32 \| good	3.546 \| good	11.899 \| good	35.47 \| good	0.578 \| good	2.219 \| good	0.291 \| good
2026-03-08T15:00:00.000Z	34 \| good	3.646 \| good	12.647 \| good	36.564 \| good	0.694 \| good	5.586 \| good	0.32 \| good
2026-03-08T16:00:00.000Z	30 \| good	4.227 \| good	17.291 \| good	31.89 \| good	0.643 \| good	2.339 \| good	0.301 \| good
2026-03-08T17:00:00.000Z	36 \| good	4.587 \| good	15.577 \| good	38.544 \| good	0.625 \| good	2.595 \| good	0.244 \| good
2026-03-08T18:00:00.000Z	36 \| good	2.134 \| good	11.411 \| good	38.593 \| good	0.588 \| good	1.57 \| good	0.191 \| good
2026-03-08T19:00:00.000Z	41 \| good	2.963 \| good	17.161 \| good	44.401 \| good	0.588 \| good	1.416 \| good	0.153 \| good
2026-03-08T20:00:00.000Z	41 \| good	3.327 \| good	16.579 \| good	43.651 \| good	0.581 \| good	1.67 \| good	0.137 \| good
2026-03-08T21:00:00.000Z	43 \| good	4.108 \| good	22.904 \| good	45.622 \| good	0.623 \| good	1.747 \| good	0.126 \| good
2026-03-08T22:00:00.000Z	44 \| good	1.744 \| good	16.96 \| good	48.045 \| good	0.716 \| good	2.102 \| good	0.126 \| good
2026-03-08T23:00:00.000Z	45 \| good	2.749 \| good	16.092 \| good	49.355 \| good	0.634 \| good	1.83 \| good	0.124 \| good
2026-03-09T00:00:00.000Z	45 \| good	2.797 \| good	14.743 \| good	49.279 \| good	0.627 \| good	2.115 \| good	0.137 \| good
2026-03-09T01:00:00.000Z	44 \| good	2.304 \| good	22.281 \| good	48.021 \| good	0.661 \| good	2.283 \| good	0.124 \| good
2026-03-09T02:00:00.000Z	42 \| good	2.523 \| good	14.52 \| good	44.794 \| good	0.666 \| good	3.585 \| good	0.132 \| good
2026-03-09T03:00:00.000Z	52 \| moderate	10.447 \| good	45.912 \| good	20.753 \| good	1.356 \| good	30.135 \| good	0.271 \| good
2026-03-09T04:00:00.000Z	33 \| good	5.805 \| good	23.649 \| good	35.431 \| good	0.635 \| good	19.033 \| good	0.323 \| good
2026-03-09T05:00:00.000Z	29 \| good	5.245 \| good	16.797 \| good	31.209 \| good	0.836 \| good	23.993 \| good	0.29 \| good
2026-03-09T06:00:00.000Z	33 \| good	6.493 \| good	25.278 \| good	32.987 \| good	0.587 \| good	30.634 \| good	0.257 \| good
2026-03-09T07:00:00.000Z	33 \| good	6.423 \| good	31.07 \| good	29.173 \| good	0.597 \| good	30.634 \| good	0.256 \| good
2026-03-09T08:00:00.000Z	27 \| good	5.485 \| good	23.251 \| good	27.774 \| good	0.776 \| good	28.911 \| good	0.39 \| good
2026-03-09T09:00:00.000Z	44 \| good	8.405 \| good	31.393 \| good	29.896 \| good	0.749 \| good	13.174 \| good	0.226 \| good
2026-03-09T10:00:00.000Z	44 \| good	7.521 \| good	29.361 \| good	24.945 \| good	0.647 \| good	7.909 \| good	0.197 \| good
2026-03-09T11:00:00.000Z	33 \| good	5.929 \| good	21.643 \| good	22.057 \| good	0.701 \| good	15.512 \| good	0.212 \| good
2026-03-09T12:00:00.000Z	27 \| good	5.061 \| good	23.326 \| good	25.168 \| good	0.607 \| good	25.136 \| good	0.297 \| good
2026-03-09T13:00:00.000Z	27 \| good	5.202 \| good	22.943 \| good	24.299 \| good	0.605 \| good	25.136 \| good	0.297 \| good
2026-03-09T14:00:00.000Z	33 \| good	5.575 \| good	26.6 \| good	15.678 \| good	0.71 \| good	31.313 \| good	0.499 \| good
2026-03-09T15:00:00.000Z	44 \| good	8.414 \| good	32.965 \| good	19.776 \| good	0.851 \| good	32.134 \| good	0.635 \| good
2026-03-09T16:00:00.000Z	54 \| moderate	11.003 \| good	47.84 \| good	14.393 \| good	0.958 \| good	35.358 \| good	0.532 \| good
2026-03-09T17:00:00.000Z	54 \| moderate	11.296 \| good	46.868 \| good	18.462 \| good	0.936 \| good	31.513 \| good	0.338 \| good
2026-03-09T18:00:00.000Z	44 \| good	7.528 \| good	31.544 \| good	30.03 \| good	0.822 \| good	24.134 \| good	0.301 \| good
2026-03-09T19:00:00.000Z	38 \| good	7.424 \| good	27.583 \| good	35.562 \| good	0.779 \| good	20.935 \| good	0.217 \| good
2026-03-09T20:00:00.000Z	37 \| good	6.387 \| good	26.359 \| good	40.479 \| good	0.767 \| good	10.71 \| good	0.217 \| good
2026-03-09T20:00:00.000Z	38 \| good	6.331 \| good	26.22 \| good	40.701 \| good	0.767 \| good	11.273 \| good	0.217 \| good
2026-03-09T21:00:00.000Z	45 \| good	8.09 \| good	35.922 \| good	49.354 \| good	1.584 \| good	3.464 \| good	0.145 \| good
2026-03-09T22:00:00.000Z	45 \| good	8.058 \| good	34.984 \| good	49.228 \| good	1.748 \| good	3.871 \| good	0.144 \| good
2026-03-09T23:00:00.000Z	48 \| good	8.127 \| good	35.932 \| good	52.189 \| good	1.913 \| good	4.279 \| good	0.143 \| good
2026-03-10T00:00:00.000Z	49 \| good	8.246 \| good	35.971 \| good	52.85 \| good	2.078 \| good	4.686 \| good	0.143 \| good
2026-03-10T01:00:00.000Z	42 \| good	6.488 \| good	28.915 \| good	45.216 \| good	2.298 \| good	9.567 \| good	0.162 \| good
2026-03-10T02:00:00.000Z	31 \| good	3.965 \| good	17.004 \| good	33.324 \| good	2.518 \| good	14.448 \| good	0.182 \| good
2026-03-10T03:00:00.000Z	33 \| good	4.747 \| good	20.952 \| good	36.425 \| good	2.739 \| good	19.329 \| good	0.202 \| good
2026-03-10T04:00:00.000Z	29 \| good	4.206 \| good	18.918 \| good	31.013 \| good	2.977 \| good	25.166 \| good	0.23 \| good
2026-03-10T05:00:00.000Z	33 \| good	5.603 \| good	23.967 \| good	27.092 \| good	3.215 \| good	31.003 \| good	0.259 \| good
2026-03-10T06:00:00.000Z	35 \| good	5.766 \| good	24.958 \| good	24.862 \| good	3.454 \| good	36.84 \| good	0.288 \| good
2026-03-10T07:00:00.000Z	44 \| good	8.376 \| good	36.968 \| good	19.466 \| good	3.592 \| good	37.363 \| good	0.307 \| good
2026-03-10T08:00:00.000Z	54 \| moderate	10.902 \| good	47.968 \| good	12.426 \| good	3.73 \| good	37.887 \| good	0.326 \| good
2026-03-10T09:00:00.000Z	58 \| moderate	13.336 \| fine	60.826 \| fine	9.107 \| good	3.869 \| good	38.411 \| good	0.345 \| good
2026-03-10T10:00:00.000Z	56 \| moderate	12.251 \| fine	54.615 \| good	15.952 \| good	3.896 \| good	36.787 \| good	0.336 \| good
2026-03-10T11:00:00.000Z	60 \| moderate	13.912 \| fine	62.515 \| fine	18.51 \| good	3.923 \| good	35.163 \| good	0.328 \| good
2026-03-10T12:00:00.000Z	60 \| moderate	13.706 \| fine	62.44 \| fine	8.226 \| good	3.95 \| good	33.538 \| good	0.32 \| good
2026-03-10T13:00:00.000Z	64 \| moderate	16.383 \| fine	72.564 \| fine	8.981 \| good	3.874 \| good	31.812 \| good	0.334 \| good
2026-03-10T14:00:00.000Z	66 \| moderate	16.906 \| fine	74.593 \| fine	10.88 \| good	3.798 \| good	30.086 \| good	0.348 \| good
2026-03-10T15:00:00.000Z	69 \| moderate	18.719 \| fine	82.577 \| fine	12.382 \| good	3.722 \| good	28.359 \| good	0.362 \| good
2026-03-10T16:00:00.000Z	66 \| moderate	16.525 \| fine	72.549 \| fine	20.136 \| good	3.904 \| good	23.579 \| good	0.307 \| good
2026-03-10T17:00:00.000Z	58 \| moderate	12.824 \| fine	58.574 \| fine	29.279 \| good	4.085 \| good	18.798 \| good	0.252 \| good
2026-03-10T18:00:00.000Z	49 \| good	9.356 \| good	41.847 \| good	31.221 \| good	4.267 \| good	14.017 \| good	0.197 \| good
2026-03-10T19:00:00.000Z	52 \| moderate	9.885 \| good	43.886 \| good	37.237 \| good	4.092 \| good	12.094 \| good	0.188 \| good
2026-03-10T20:00:00.000Z	49 \| good	9.148 \| good	40.879 \| good	40.883 \| good	3.917 \| good	10.171 \| good	0.178 \| good
2026-03-10T21:00:00.000Z	52 \| moderate	9.871 \| good	43.935 \| good	44.479 \| good	3.741 \| good	8.248 \| good	0.169 \| good
2026-03-10T22:00:00.000Z	49 \| good	8.542 \| good	37.105 \| good	47.099 \| good	3.721 \| good	8.178 \| good	0.166 \| good
2026-03-10T23:00:00.000Z	46 \| good	6.265 \| good	28.038 \| good	50.083 \| good	3.701 \| good	8.109 \| good	0.163 \| good
2026-03-11T00:00:00.000Z	47 \| good	5.935 \| good	26.902 \| good	50.639 \| good	3.681 \| good	8.04 \| good	0.16 \| good
2026-03-11T01:00:00.000Z	40 \| good	5.212 \| good	22.932 \| good	43.476 \| good	3.599 \| good	12.508 \| good	0.178 \| good
2026-03-11T02:00:00.000Z	33 \| good	5.995 \| good	26.915 \| good	31.672 \| good	3.516 \| good	16.976 \| good	0.196 \| good
2026-03-11T03:00:00.000Z	33 \| good	6.395 \| good	28.938 \| good	31.084 \| good	3.434 \| good	21.444 \| good	0.214 \| good
2026-03-11T04:00:00.000Z	38 \| good	7.104 \| good	31.889 \| good	19.631 \| good	3.541 \| good	26.653 \| good	0.234 \| good
2026-03-11T05:00:00.000Z	44 \| good	8.124 \| good	35.884 \| good	8.7 \| good	3.648 \| good	31.862 \| good	0.254 \| good
2026-03-11T06:00:00.000Z	77 \| moderate	22.734 \| fine	26.158 \| good	3.508 \| good	3.745 \| good	37.239 \| good	0.275 \| good
2026-03-11T07:00:00.000Z	54 \| moderate	11.297 \| good	49.767 \| good	6.632 \| good	3.794 \| good	37.027 \| good	0.293 \| good
2026-03-11T08:00:00.000Z	56 \| moderate	12.116 \| fine	54.722 \| good	14.253 \| good	3.833 \| good	36.982 \| good	0.312 \| good
2026-03-11T09:00:00.000Z	56 \| moderate	12.484 \| fine	56.753 \| fine	6.28 \| good	3.872 \| good	36.938 \| good	0.332 \| good
2026-03-11T10:00:00.000Z	58 \| moderate	13.325 \| fine	60.811 \| fine	6.058 \| good	3.375 \| good	35.053 \| good	0.332 \| good
2026-03-11T11:00:00.000Z	60 \| moderate	14.071 \| fine	62.946 \| fine	4.607 \| good	2.877 \| good	33.168 \| good	0.332 \| good
2026-03-11T12:00:00.000Z	90 \| moderate	29.681 \| fine	30.541 \| good	1.289 \| good	2.38 \| good	31.37 \| good	0.334 \| good
2026-03-11T13:00:00.000Z	86 \| moderate	28.297 \| fine	29.137 \| good	2.881 \| good	2.548 \| good	29.76 \| good	0.335 \| good
2026-03-11T14:00:00.000Z	86 \| moderate	27.611 \| fine	28.561 \| good	4.473 \| good	2.715 \| good	28.149 \| good	0.337 \| good
2026-03-11T15:00:00.000Z	88 \| moderate	28.788 \| fine	30.029 \| good	6.065 \| good	2.883 \| good	26.539 \| good	0.338 \| good
2026-03-11T16:00:00.000Z	84 \| moderate	27.117 \| fine	28.516 \| good	17.26 \| good	3.217 \| good	22.703 \| good	0.305 \| good
2026-03-11T17:00:00.000Z	64 \| moderate	16.078 \| fine	70.669 \| fine	23.07 \| good	3.54 \| good	18.739 \| good	0.272 \| good
2026-03-11T18:00:00.000Z	67 \| moderate	17.773 \| fine	20.776 \| good	39.65 \| good	3.884 \| good	15.03 \| good	0.241 \| good
2026-03-11T19:00:00.000Z	66 \| moderate	16.788 \| fine	19.586 \| good	44.347 \| good	3.951 \| good	14.165 \| good	0.233 \| good
2026-03-11T20:00:00.000Z	64 \| moderate	16.488 \| fine	19.186 \| good	49.043 \| good	4.018 \| good	13.3 \| good	0.225 \| good

Ontario

Empower business decisions with accurate air quality data

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

0.22ppm

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 05:00:00, 2026-03-09.

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 2026-03-09.

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

The air quality in Ontario, California right now is Good, with an AQI of 38.

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 6.331 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 26.22 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.217 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.767 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 40.701 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 11.273 ppb.

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