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

Ontario, California currently has a PM10 concentration of 34.034 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 1.019 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 42.215 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 28.22 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 8.241 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)

8.24 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

34.03 μg/m³

155

255

425

605+

Ozone (O₃)

42.22 ppb

201

201+

Sulfur Dioxide (SO₂)

1.02 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

28.22 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.31 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

High

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
2026-04-22T06:00:00.000Z	33 \| good	4.306 \| good	13.451 \| good	35.955 \| good	0.904 \| good	22.048 \| good	0.284 \| good
2026-04-22T07:00:00.000Z	31 \| good	4.845 \| good	12.065 \| good	33.906 \| good	0.725 \| good	21.007 \| good	0.304 \| good
2026-04-22T08:00:00.000Z	31 \| good	4.166 \| good	13.518 \| good	33.261 \| good	0.687 \| good	13.592 \| good	0.244 \| good
2026-04-22T09:00:00.000Z	31 \| good	3.983 \| good	13.892 \| good	32.574 \| good	0.749 \| good	14.781 \| good	0.237 \| good
2026-04-22T10:00:00.000Z	27 \| good	4.6 \| good	11.285 \| good	26.771 \| good	0.688 \| good	16.611 \| good	0.232 \| good
2026-04-22T11:00:00.000Z	27 \| good	5.373 \| good	13.2 \| good	25.377 \| good	0.793 \| good	20.742 \| good	0.303 \| good
2026-04-22T12:00:00.000Z	33 \| good	5.848 \| good	14.166 \| good	23.822 \| good	0.698 \| good	19.785 \| good	0.403 \| good
2026-04-22T13:00:00.000Z	44 \| good	7.584 \| good	25.867 \| good	23.169 \| good	0.749 \| good	33.936 \| good	0.449 \| good
2026-04-22T14:00:00.000Z	33 \| good	5.898 \| good	19.998 \| good	20.044 \| good	0.666 \| good	31.685 \| good	0.503 \| good
2026-04-22T15:00:00.000Z	38 \| good	6.645 \| good	25.444 \| good	22.752 \| good	0.732 \| good	28.194 \| good	0.409 \| good
2026-04-22T16:00:00.000Z	38 \| good	6.747 \| good	25.962 \| good	25.631 \| good	0.746 \| good	21.913 \| good	0.319 \| good
2026-04-22T17:00:00.000Z	33 \| good	6.183 \| good	18.982 \| good	32.211 \| good	0.636 \| good	11.025 \| good	0.249 \| good
2026-04-22T18:00:00.000Z	32 \| good	4.378 \| good	13.194 \| good	34.55 \| good	0.725 \| good	14.266 \| good	0.241 \| good
2026-04-22T19:00:00.000Z	38 \| good	4.459 \| good	13.45 \| good	41.283 \| good	0.654 \| good	16.66 \| good	0.241 \| good
2026-04-22T20:00:00.000Z	44 \| good	4.454 \| good	12.003 \| good	47.52 \| good	0.689 \| good	17.279 \| good	0.229 \| good
2026-04-22T21:00:00.000Z	46 \| good	3.566 \| good	19.484 \| good	49.831 \| good	0.678 \| good	16.255 \| good	0.229 \| good
2026-04-22T22:00:00.000Z	47 \| good	4.184 \| good	16.903 \| good	51.324 \| good	0.694 \| good	15.459 \| good	0.221 \| good
2026-04-22T23:00:00.000Z	47 \| good	4.978 \| good	19.408 \| good	51.472 \| good	0.732 \| good	17.442 \| good	0.221 \| good
2026-04-23T00:00:00.000Z	47 \| good	4.97 \| good	17.366 \| good	50.556 \| good	0.786 \| good	16.649 \| good	0.272 \| good
2026-04-23T01:00:00.000Z	45 \| good	6.031 \| good	26.325 \| good	48.915 \| good	0.788 \| good	15.614 \| good	0.272 \| good
2026-04-23T02:00:00.000Z	44 \| good	4.42 \| good	24.644 \| good	47.498 \| good	0.809 \| good	18.928 \| good	0.272 \| good
2026-04-23T03:00:00.000Z	41 \| good	4.794 \| good	25.84 \| good	44.436 \| good	0.805 \| good	20.803 \| good	0.284 \| good
2026-04-23T04:00:00.000Z	39 \| good	3.856 \| good	20.093 \| good	42.293 \| good	0.804 \| good	20.468 \| good	0.292 \| good
2026-04-23T05:00:00.000Z	34 \| good	5.248 \| good	21.833 \| good	36.525 \| good	0.961 \| good	18.694 \| good	0.292 \| good
2026-04-23T06:00:00.000Z	33 \| good	5.854 \| good	17.235 \| good	32.268 \| good	0.813 \| good	19.962 \| good	0.324 \| good
2026-04-23T07:00:00.000Z	33 \| good	6.349 \| good	22.088 \| good	29.019 \| good	0.847 \| good	19.811 \| good	0.331 \| good
2026-04-23T08:00:00.000Z	33 \| good	6.006 \| good	18.926 \| good	27.281 \| good	0.825 \| good	13.508 \| good	0.256 \| good
2026-04-23T09:00:00.000Z	33 \| good	5.83 \| good	22.458 \| good	24.007 \| good	0.816 \| good	12.709 \| good	0.254 \| good
2026-04-23T10:00:00.000Z	22 \| good	4.44 \| good	18.048 \| good	17.575 \| good	0.747 \| good	14.194 \| good	0.326 \| good
2026-04-23T11:00:00.000Z	38 \| good	6.555 \| good	18.994 \| good	15.255 \| good	0.857 \| good	26.977 \| good	0.305 \| good
2026-04-23T12:00:00.000Z	44 \| good	7.542 \| good	13.685 \| good	13.616 \| good	0.777 \| good	28.828 \| good	0.326 \| good
2026-04-23T13:00:00.000Z	44 \| good	8.435 \| good	16.164 \| good	14.055 \| good	0.843 \| good	28.18 \| good	0.522 \| good
2026-04-23T14:00:00.000Z	38 \| good	7.102 \| good	28.585 \| good	18.271 \| good	0.904 \| good	26.624 \| good	0.571 \| good
2026-04-23T15:00:00.000Z	38 \| good	6.883 \| good	39.936 \| good	18.864 \| good	0.903 \| good	29.061 \| good	0.437 \| good
2026-04-23T16:00:00.000Z	38 \| good	6.726 \| good	31.782 \| good	24.292 \| good	0.903 \| good	29.55 \| good	0.341 \| good
2026-04-23T17:00:00.000Z	49 \| good	8.837 \| good	39.618 \| good	29.564 \| good	0.885 \| good	23.618 \| good	0.321 \| good
2026-04-23T18:00:00.000Z	49 \| good	8.548 \| good	47.772 \| good	32.634 \| good	0.876 \| good	21.361 \| good	0.3 \| good
2026-04-23T19:00:00.000Z	44 \| good	7.54 \| good	32.536 \| good	39.555 \| good	0.865 \| good	19.787 \| good	0.263 \| good
2026-04-23T20:00:00.000Z	42 \| good	6.713 \| good	37.117 \| good	44.68 \| good	0.847 \| good	16.335 \| good	0.28 \| good
2026-04-23T21:00:00.000Z	49 \| good	7.279 \| good	31.036 \| good	52.816 \| good	0.862 \| good	11.651 \| good	0.249 \| good
2026-04-23T22:00:00.000Z	51 \| moderate	8.371 \| good	47.445 \| good	54.728 \| good	0.81 \| good	12 \| good	0.249 \| good
2026-04-23T23:00:00.000Z	64 \| moderate	8.385 \| good	33.524 \| good	59.398 \| fine	0.822 \| good	13.969 \| good	0.249 \| good
2026-04-24T00:00:00.000Z	61 \| moderate	7.233 \| good	46.506 \| good	57.657 \| fine	0.81 \| good	17.451 \| good	0.3 \| good
2026-04-24T01:00:00.000Z	48 \| good	7.724 \| good	34.761 \| good	52.477 \| good	0.829 \| good	20.593 \| good	0.292 \| good
2026-04-24T02:00:00.000Z	51 \| moderate	8.84 \| good	36.595 \| good	55.412 \| fine	0.936 \| good	22.675 \| good	0.297 \| good
2026-04-24T03:00:00.000Z	56 \| moderate	11.964 \| good	53.929 \| good	40.988 \| good	4.843 \| good	14.817 \| good	0.194 \| good
2026-04-24T04:00:00.000Z	49 \| good	8.525 \| good	30.046 \| good	49.051 \| good	0.906 \| good	26.005 \| good	0.312 \| good
2026-04-24T05:00:00.000Z	44 \| good	8.122 \| good	33.309 \| good	43.128 \| good	1.038 \| good	26.297 \| good	0.312 \| good
2026-04-24T05:00:00.000Z	44 \| good	8.241 \| good	34.034 \| good	42.215 \| good	1.019 \| good	28.22 \| good	0.312 \| good
2026-04-24T06:00:00.000Z	54 \| moderate	10.755 \| good	47.593 \| good	22.653 \| good	4.566 \| good	24.273 \| good	0.238 \| good
2026-04-24T07:00:00.000Z	54 \| moderate	11.035 \| good	48.715 \| good	18.519 \| good	4.581 \| good	24.814 \| good	0.246 \| good
2026-04-24T08:00:00.000Z	56 \| moderate	12.16 \| fine	54.618 \| good	21.235 \| good	4.596 \| good	25.356 \| good	0.253 \| good
2026-04-24T09:00:00.000Z	58 \| moderate	12.746 \| fine	56.76 \| fine	19.332 \| good	4.611 \| good	25.897 \| good	0.261 \| good
2026-04-24T10:00:00.000Z	58 \| moderate	13.005 \| fine	58.386 \| fine	16.537 \| good	4.774 \| good	25.42 \| good	0.261 \| good
2026-04-24T11:00:00.000Z	60 \| moderate	13.732 \| fine	62.091 \| fine	12.789 \| good	4.937 \| good	24.942 \| good	0.26 \| good
2026-04-24T12:00:00.000Z	62 \| moderate	14.506 \| fine	64.144 \| fine	11.368 \| good	5.1 \| good	24.465 \| good	0.26 \| good
2026-04-24T13:00:00.000Z	71 \| moderate	19.757 \| fine	87.567 \| fine	13.804 \| good	5.105 \| good	21.433 \| good	0.254 \| good
2026-04-24T14:00:00.000Z	71 \| moderate	19.62 \| fine	86.674 \| fine	21.631 \| good	5.109 \| good	18.401 \| good	0.249 \| good
2026-04-24T15:00:00.000Z	73 \| moderate	20.73 \| fine	90.67 \| fine	30.309 \| good	5.114 \| good	15.369 \| good	0.244 \| good
2026-04-24T16:00:00.000Z	69 \| moderate	18.95 \| fine	83.397 \| fine	38.036 \| good	4.475 \| good	11.752 \| good	0.216 \| good
2026-04-24T17:00:00.000Z	58 \| moderate	13.188 \| fine	59.389 \| fine	42.577 \| good	3.836 \| good	8.136 \| good	0.188 \| good
2026-04-24T18:00:00.000Z	49 \| good	9.203 \| good	40.563 \| good	49.61 \| good	3.197 \| good	4.519 \| good	0.16 \| good
2026-04-24T19:00:00.000Z	51 \| moderate	7.294 \| good	31.974 \| good	55.358 \| fine	2.712 \| good	3.618 \| good	0.153 \| good
2026-04-24T20:00:00.000Z	61 \| moderate	5.673 \| good	24.142 \| good	58.371 \| fine	2.228 \| good	2.717 \| good	0.147 \| good
2026-04-24T21:00:00.000Z	67 \| moderate	5.273 \| good	22.795 \| good	59.923 \| fine	1.743 \| good	1.816 \| good	0.141 \| good
2026-04-24T22:00:00.000Z	71 \| moderate	4.928 \| good	21 \| good	60.827 \| fine	1.649 \| good	2.072 \| good	0.14 \| good
2026-04-24T23:00:00.000Z	67 \| moderate	5.233 \| good	22.71 \| good	60.195 \| fine	1.554 \| good	2.328 \| good	0.14 \| good
2026-04-25T00:00:00.000Z	50 \| good	5.88 \| good	26.462 \| good	54.42 \| good	1.46 \| good	2.585 \| good	0.14 \| good
2026-04-25T01:00:00.000Z	44 \| good	6.458 \| good	28.717 \| good	48.25 \| good	1.669 \| good	4.338 \| good	0.147 \| good
2026-04-25T02:00:00.000Z	44 \| good	7.297 \| good	31.983 \| good	48.34 \| good	1.878 \| good	6.091 \| good	0.154 \| good
2026-04-25T03:00:00.000Z	49 \| good	8.664 \| good	37.929 \| good	44.996 \| good	2.086 \| good	7.844 \| good	0.161 \| good
2026-04-25T04:00:00.000Z	49 \| good	8.65 \| good	37.929 \| good	43.572 \| good	2.197 \| good	9.45 \| good	0.168 \| good
2026-04-25T05:00:00.000Z	52 \| moderate	10.081 \| good	44.928 \| good	41.949 \| good	2.307 \| good	11.057 \| good	0.175 \| good
2026-04-25T06:00:00.000Z	44 \| good	8.299 \| good	36.643 \| good	42.594 \| good	2.417 \| good	12.664 \| good	0.181 \| good
2026-04-25T07:00:00.000Z	44 \| good	7.998 \| good	34.884 \| good	44.511 \| good	2.319 \| good	10.967 \| good	0.174 \| good
2026-04-25T08:00:00.000Z	44 \| good	8.469 \| good	36.985 \| good	43.548 \| good	2.22 \| good	9.27 \| good	0.167 \| good
2026-04-25T09:00:00.000Z	49 \| good	9.236 \| good	40.999 \| good	41.77 \| good	2.122 \| good	7.574 \| good	0.161 \| good
2026-04-25T10:00:00.000Z	44 \| good	8.206 \| good	36.168 \| good	39.148 \| good	1.886 \| good	6.523 \| good	0.154 \| good
2026-04-25T11:00:00.000Z	44 \| good	7.594 \| good	33.179 \| good	36.673 \| good	1.651 \| good	5.472 \| good	0.148 \| good
2026-04-25T12:00:00.000Z	33 \| good	6.191 \| good	27.114 \| good	35.188 \| good	1.415 \| good	4.421 \| good	0.142 \| good
2026-04-25T13:00:00.000Z	30 \| good	3.797 \| good	16.592 \| good	32.264 \| good	1.241 \| good	4.196 \| good	0.14 \| good
2026-04-25T14:00:00.000Z	31 \| good	4.563 \| good	19.523 \| good	34.253 \| good	1.067 \| good	3.972 \| good	0.138 \| good
2026-04-25T15:00:00.000Z	36 \| good	4.294 \| good	18.503 \| good	39.398 \| good	0.892 \| good	3.748 \| good	0.136 \| good
2026-04-25T16:00:00.000Z	37 \| good	5.455 \| good	23.67 \| good	39.513 \| good	0.841 \| good	3.314 \| good	0.134 \| good
2026-04-25T17:00:00.000Z	39 \| good	4.39 \| good	18.771 \| good	42.358 \| good	0.79 \| good	2.881 \| good	0.133 \| good
2026-04-25T18:00:00.000Z	42 \| good	4.82 \| good	20.749 \| good	44.66 \| good	0.739 \| good	2.448 \| good	0.131 \| good
2026-04-25T19:00:00.000Z	44 \| good	4.127 \| good	17.87 \| good	46.591 \| good	0.73 \| good	2.094 \| good	0.13 \| good
2026-04-25T20:00:00.000Z	45 \| good	5.092 \| good	21.833 \| good	49.289 \| good	0.721 \| good	1.741 \| good	0.128 \| good
2026-04-25T21:00:00.000Z	49 \| good	5.544 \| good	23.812 \| good	52.954 \| good	0.711 \| good	1.387 \| good	0.127 \| good
2026-04-25T22:00:00.000Z	49 \| good	5.074 \| good	21.875 \| good	52.993 \| good	0.748 \| good	1.803 \| good	0.127 \| good
2026-04-25T23:00:00.000Z	48 \| good	4.101 \| good	17.741 \| good	51.527 \| good	0.784 \| good	2.22 \| good	0.127 \| good
2026-04-26T00:00:00.000Z	45 \| good	5 \| good	21.741 \| good	48.896 \| good	0.821 \| good	2.636 \| good	0.127 \| good
2026-04-26T01:00:00.000Z	43 \| good	4.753 \| good	20.717 \| good	45.681 \| good	0.896 \| good	3.362 \| good	0.127 \| good
2026-04-26T02:00:00.000Z	34 \| good	4.666 \| good	20.643 \| good	37.449 \| good	0.971 \| good	4.088 \| good	0.128 \| good
2026-04-26T03:00:00.000Z	39 \| good	5.369 \| good	22.893 \| good	42.225 \| good	1.046 \| good	4.814 \| good	0.129 \| good
2026-04-26T04:00:00.000Z	35 \| good	4.458 \| good	19.646 \| good	37.588 \| good	1.209 \| good	5.292 \| good	0.129 \| good
2026-04-26T05:00:00.000Z	31 \| good	5.117 \| good	22.059 \| good	33.8 \| good	1.372 \| good	5.771 \| good	0.129 \| good

Ontario

Empower business decisions with accurate air quality data

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

0.33ppm

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 11:00:00, 2026-04-23.

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

The best air quality in Ontario, California was observed at 10:00:00 on 2026-04-23.

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

The air quality in Ontario, California right now is Good, with an AQI of 44.

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 8.241 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 34.034 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.312 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 1.019 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 42.215 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 28.22 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-04-22T06:00:00.000Z	33 \| good	4.306 \| good	13.451 \| good	35.955 \| good	0.904 \| good	22.048 \| good	0.284 \| good
2026-04-22T07:00:00.000Z	31 \| good	4.845 \| good	12.065 \| good	33.906 \| good	0.725 \| good	21.007 \| good	0.304 \| good
2026-04-22T08:00:00.000Z	31 \| good	4.166 \| good	13.518 \| good	33.261 \| good	0.687 \| good	13.592 \| good	0.244 \| good
2026-04-22T09:00:00.000Z	31 \| good	3.983 \| good	13.892 \| good	32.574 \| good	0.749 \| good	14.781 \| good	0.237 \| good
2026-04-22T10:00:00.000Z	27 \| good	4.6 \| good	11.285 \| good	26.771 \| good	0.688 \| good	16.611 \| good	0.232 \| good
2026-04-22T11:00:00.000Z	27 \| good	5.373 \| good	13.2 \| good	25.377 \| good	0.793 \| good	20.742 \| good	0.303 \| good
2026-04-22T12:00:00.000Z	33 \| good	5.848 \| good	14.166 \| good	23.822 \| good	0.698 \| good	19.785 \| good	0.403 \| good
2026-04-22T13:00:00.000Z	44 \| good	7.584 \| good	25.867 \| good	23.169 \| good	0.749 \| good	33.936 \| good	0.449 \| good
2026-04-22T14:00:00.000Z	33 \| good	5.898 \| good	19.998 \| good	20.044 \| good	0.666 \| good	31.685 \| good	0.503 \| good
2026-04-22T15:00:00.000Z	38 \| good	6.645 \| good	25.444 \| good	22.752 \| good	0.732 \| good	28.194 \| good	0.409 \| good
2026-04-22T16:00:00.000Z	38 \| good	6.747 \| good	25.962 \| good	25.631 \| good	0.746 \| good	21.913 \| good	0.319 \| good
2026-04-22T17:00:00.000Z	33 \| good	6.183 \| good	18.982 \| good	32.211 \| good	0.636 \| good	11.025 \| good	0.249 \| good
2026-04-22T18:00:00.000Z	32 \| good	4.378 \| good	13.194 \| good	34.55 \| good	0.725 \| good	14.266 \| good	0.241 \| good
2026-04-22T19:00:00.000Z	38 \| good	4.459 \| good	13.45 \| good	41.283 \| good	0.654 \| good	16.66 \| good	0.241 \| good
2026-04-22T20:00:00.000Z	44 \| good	4.454 \| good	12.003 \| good	47.52 \| good	0.689 \| good	17.279 \| good	0.229 \| good
2026-04-22T21:00:00.000Z	46 \| good	3.566 \| good	19.484 \| good	49.831 \| good	0.678 \| good	16.255 \| good	0.229 \| good
2026-04-22T22:00:00.000Z	47 \| good	4.184 \| good	16.903 \| good	51.324 \| good	0.694 \| good	15.459 \| good	0.221 \| good
2026-04-22T23:00:00.000Z	47 \| good	4.978 \| good	19.408 \| good	51.472 \| good	0.732 \| good	17.442 \| good	0.221 \| good
2026-04-23T00:00:00.000Z	47 \| good	4.97 \| good	17.366 \| good	50.556 \| good	0.786 \| good	16.649 \| good	0.272 \| good
2026-04-23T01:00:00.000Z	45 \| good	6.031 \| good	26.325 \| good	48.915 \| good	0.788 \| good	15.614 \| good	0.272 \| good
2026-04-23T02:00:00.000Z	44 \| good	4.42 \| good	24.644 \| good	47.498 \| good	0.809 \| good	18.928 \| good	0.272 \| good
2026-04-23T03:00:00.000Z	41 \| good	4.794 \| good	25.84 \| good	44.436 \| good	0.805 \| good	20.803 \| good	0.284 \| good
2026-04-23T04:00:00.000Z	39 \| good	3.856 \| good	20.093 \| good	42.293 \| good	0.804 \| good	20.468 \| good	0.292 \| good
2026-04-23T05:00:00.000Z	34 \| good	5.248 \| good	21.833 \| good	36.525 \| good	0.961 \| good	18.694 \| good	0.292 \| good
2026-04-23T06:00:00.000Z	33 \| good	5.854 \| good	17.235 \| good	32.268 \| good	0.813 \| good	19.962 \| good	0.324 \| good
2026-04-23T07:00:00.000Z	33 \| good	6.349 \| good	22.088 \| good	29.019 \| good	0.847 \| good	19.811 \| good	0.331 \| good
2026-04-23T08:00:00.000Z	33 \| good	6.006 \| good	18.926 \| good	27.281 \| good	0.825 \| good	13.508 \| good	0.256 \| good
2026-04-23T09:00:00.000Z	33 \| good	5.83 \| good	22.458 \| good	24.007 \| good	0.816 \| good	12.709 \| good	0.254 \| good
2026-04-23T10:00:00.000Z	22 \| good	4.44 \| good	18.048 \| good	17.575 \| good	0.747 \| good	14.194 \| good	0.326 \| good
2026-04-23T11:00:00.000Z	38 \| good	6.555 \| good	18.994 \| good	15.255 \| good	0.857 \| good	26.977 \| good	0.305 \| good
2026-04-23T12:00:00.000Z	44 \| good	7.542 \| good	13.685 \| good	13.616 \| good	0.777 \| good	28.828 \| good	0.326 \| good
2026-04-23T13:00:00.000Z	44 \| good	8.435 \| good	16.164 \| good	14.055 \| good	0.843 \| good	28.18 \| good	0.522 \| good
2026-04-23T14:00:00.000Z	38 \| good	7.102 \| good	28.585 \| good	18.271 \| good	0.904 \| good	26.624 \| good	0.571 \| good
2026-04-23T15:00:00.000Z	38 \| good	6.883 \| good	39.936 \| good	18.864 \| good	0.903 \| good	29.061 \| good	0.437 \| good
2026-04-23T16:00:00.000Z	38 \| good	6.726 \| good	31.782 \| good	24.292 \| good	0.903 \| good	29.55 \| good	0.341 \| good
2026-04-23T17:00:00.000Z	49 \| good	8.837 \| good	39.618 \| good	29.564 \| good	0.885 \| good	23.618 \| good	0.321 \| good
2026-04-23T18:00:00.000Z	49 \| good	8.548 \| good	47.772 \| good	32.634 \| good	0.876 \| good	21.361 \| good	0.3 \| good
2026-04-23T19:00:00.000Z	44 \| good	7.54 \| good	32.536 \| good	39.555 \| good	0.865 \| good	19.787 \| good	0.263 \| good
2026-04-23T20:00:00.000Z	42 \| good	6.713 \| good	37.117 \| good	44.68 \| good	0.847 \| good	16.335 \| good	0.28 \| good
2026-04-23T21:00:00.000Z	49 \| good	7.279 \| good	31.036 \| good	52.816 \| good	0.862 \| good	11.651 \| good	0.249 \| good
2026-04-23T22:00:00.000Z	51 \| moderate	8.371 \| good	47.445 \| good	54.728 \| good	0.81 \| good	12 \| good	0.249 \| good
2026-04-23T23:00:00.000Z	64 \| moderate	8.385 \| good	33.524 \| good	59.398 \| fine	0.822 \| good	13.969 \| good	0.249 \| good
2026-04-24T00:00:00.000Z	61 \| moderate	7.233 \| good	46.506 \| good	57.657 \| fine	0.81 \| good	17.451 \| good	0.3 \| good
2026-04-24T01:00:00.000Z	48 \| good	7.724 \| good	34.761 \| good	52.477 \| good	0.829 \| good	20.593 \| good	0.292 \| good
2026-04-24T02:00:00.000Z	51 \| moderate	8.84 \| good	36.595 \| good	55.412 \| fine	0.936 \| good	22.675 \| good	0.297 \| good
2026-04-24T03:00:00.000Z	56 \| moderate	11.964 \| good	53.929 \| good	40.988 \| good	4.843 \| good	14.817 \| good	0.194 \| good
2026-04-24T04:00:00.000Z	49 \| good	8.525 \| good	30.046 \| good	49.051 \| good	0.906 \| good	26.005 \| good	0.312 \| good
2026-04-24T05:00:00.000Z	44 \| good	8.122 \| good	33.309 \| good	43.128 \| good	1.038 \| good	26.297 \| good	0.312 \| good
2026-04-24T05:00:00.000Z	44 \| good	8.241 \| good	34.034 \| good	42.215 \| good	1.019 \| good	28.22 \| good	0.312 \| good
2026-04-24T06:00:00.000Z	54 \| moderate	10.755 \| good	47.593 \| good	22.653 \| good	4.566 \| good	24.273 \| good	0.238 \| good
2026-04-24T07:00:00.000Z	54 \| moderate	11.035 \| good	48.715 \| good	18.519 \| good	4.581 \| good	24.814 \| good	0.246 \| good
2026-04-24T08:00:00.000Z	56 \| moderate	12.16 \| fine	54.618 \| good	21.235 \| good	4.596 \| good	25.356 \| good	0.253 \| good
2026-04-24T09:00:00.000Z	58 \| moderate	12.746 \| fine	56.76 \| fine	19.332 \| good	4.611 \| good	25.897 \| good	0.261 \| good
2026-04-24T10:00:00.000Z	58 \| moderate	13.005 \| fine	58.386 \| fine	16.537 \| good	4.774 \| good	25.42 \| good	0.261 \| good
2026-04-24T11:00:00.000Z	60 \| moderate	13.732 \| fine	62.091 \| fine	12.789 \| good	4.937 \| good	24.942 \| good	0.26 \| good
2026-04-24T12:00:00.000Z	62 \| moderate	14.506 \| fine	64.144 \| fine	11.368 \| good	5.1 \| good	24.465 \| good	0.26 \| good
2026-04-24T13:00:00.000Z	71 \| moderate	19.757 \| fine	87.567 \| fine	13.804 \| good	5.105 \| good	21.433 \| good	0.254 \| good
2026-04-24T14:00:00.000Z	71 \| moderate	19.62 \| fine	86.674 \| fine	21.631 \| good	5.109 \| good	18.401 \| good	0.249 \| good
2026-04-24T15:00:00.000Z	73 \| moderate	20.73 \| fine	90.67 \| fine	30.309 \| good	5.114 \| good	15.369 \| good	0.244 \| good
2026-04-24T16:00:00.000Z	69 \| moderate	18.95 \| fine	83.397 \| fine	38.036 \| good	4.475 \| good	11.752 \| good	0.216 \| good
2026-04-24T17:00:00.000Z	58 \| moderate	13.188 \| fine	59.389 \| fine	42.577 \| good	3.836 \| good	8.136 \| good	0.188 \| good
2026-04-24T18:00:00.000Z	49 \| good	9.203 \| good	40.563 \| good	49.61 \| good	3.197 \| good	4.519 \| good	0.16 \| good
2026-04-24T19:00:00.000Z	51 \| moderate	7.294 \| good	31.974 \| good	55.358 \| fine	2.712 \| good	3.618 \| good	0.153 \| good
2026-04-24T20:00:00.000Z	61 \| moderate	5.673 \| good	24.142 \| good	58.371 \| fine	2.228 \| good	2.717 \| good	0.147 \| good
2026-04-24T21:00:00.000Z	67 \| moderate	5.273 \| good	22.795 \| good	59.923 \| fine	1.743 \| good	1.816 \| good	0.141 \| good
2026-04-24T22:00:00.000Z	71 \| moderate	4.928 \| good	21 \| good	60.827 \| fine	1.649 \| good	2.072 \| good	0.14 \| good
2026-04-24T23:00:00.000Z	67 \| moderate	5.233 \| good	22.71 \| good	60.195 \| fine	1.554 \| good	2.328 \| good	0.14 \| good
2026-04-25T00:00:00.000Z	50 \| good	5.88 \| good	26.462 \| good	54.42 \| good	1.46 \| good	2.585 \| good	0.14 \| good
2026-04-25T01:00:00.000Z	44 \| good	6.458 \| good	28.717 \| good	48.25 \| good	1.669 \| good	4.338 \| good	0.147 \| good
2026-04-25T02:00:00.000Z	44 \| good	7.297 \| good	31.983 \| good	48.34 \| good	1.878 \| good	6.091 \| good	0.154 \| good
2026-04-25T03:00:00.000Z	49 \| good	8.664 \| good	37.929 \| good	44.996 \| good	2.086 \| good	7.844 \| good	0.161 \| good
2026-04-25T04:00:00.000Z	49 \| good	8.65 \| good	37.929 \| good	43.572 \| good	2.197 \| good	9.45 \| good	0.168 \| good
2026-04-25T05:00:00.000Z	52 \| moderate	10.081 \| good	44.928 \| good	41.949 \| good	2.307 \| good	11.057 \| good	0.175 \| good
2026-04-25T06:00:00.000Z	44 \| good	8.299 \| good	36.643 \| good	42.594 \| good	2.417 \| good	12.664 \| good	0.181 \| good
2026-04-25T07:00:00.000Z	44 \| good	7.998 \| good	34.884 \| good	44.511 \| good	2.319 \| good	10.967 \| good	0.174 \| good
2026-04-25T08:00:00.000Z	44 \| good	8.469 \| good	36.985 \| good	43.548 \| good	2.22 \| good	9.27 \| good	0.167 \| good
2026-04-25T09:00:00.000Z	49 \| good	9.236 \| good	40.999 \| good	41.77 \| good	2.122 \| good	7.574 \| good	0.161 \| good
2026-04-25T10:00:00.000Z	44 \| good	8.206 \| good	36.168 \| good	39.148 \| good	1.886 \| good	6.523 \| good	0.154 \| good
2026-04-25T11:00:00.000Z	44 \| good	7.594 \| good	33.179 \| good	36.673 \| good	1.651 \| good	5.472 \| good	0.148 \| good
2026-04-25T12:00:00.000Z	33 \| good	6.191 \| good	27.114 \| good	35.188 \| good	1.415 \| good	4.421 \| good	0.142 \| good
2026-04-25T13:00:00.000Z	30 \| good	3.797 \| good	16.592 \| good	32.264 \| good	1.241 \| good	4.196 \| good	0.14 \| good
2026-04-25T14:00:00.000Z	31 \| good	4.563 \| good	19.523 \| good	34.253 \| good	1.067 \| good	3.972 \| good	0.138 \| good
2026-04-25T15:00:00.000Z	36 \| good	4.294 \| good	18.503 \| good	39.398 \| good	0.892 \| good	3.748 \| good	0.136 \| good
2026-04-25T16:00:00.000Z	37 \| good	5.455 \| good	23.67 \| good	39.513 \| good	0.841 \| good	3.314 \| good	0.134 \| good
2026-04-25T17:00:00.000Z	39 \| good	4.39 \| good	18.771 \| good	42.358 \| good	0.79 \| good	2.881 \| good	0.133 \| good
2026-04-25T18:00:00.000Z	42 \| good	4.82 \| good	20.749 \| good	44.66 \| good	0.739 \| good	2.448 \| good	0.131 \| good
2026-04-25T19:00:00.000Z	44 \| good	4.127 \| good	17.87 \| good	46.591 \| good	0.73 \| good	2.094 \| good	0.13 \| good
2026-04-25T20:00:00.000Z	45 \| good	5.092 \| good	21.833 \| good	49.289 \| good	0.721 \| good	1.741 \| good	0.128 \| good
2026-04-25T21:00:00.000Z	49 \| good	5.544 \| good	23.812 \| good	52.954 \| good	0.711 \| good	1.387 \| good	0.127 \| good
2026-04-25T22:00:00.000Z	49 \| good	5.074 \| good	21.875 \| good	52.993 \| good	0.748 \| good	1.803 \| good	0.127 \| good
2026-04-25T23:00:00.000Z	48 \| good	4.101 \| good	17.741 \| good	51.527 \| good	0.784 \| good	2.22 \| good	0.127 \| good
2026-04-26T00:00:00.000Z	45 \| good	5 \| good	21.741 \| good	48.896 \| good	0.821 \| good	2.636 \| good	0.127 \| good
2026-04-26T01:00:00.000Z	43 \| good	4.753 \| good	20.717 \| good	45.681 \| good	0.896 \| good	3.362 \| good	0.127 \| good
2026-04-26T02:00:00.000Z	34 \| good	4.666 \| good	20.643 \| good	37.449 \| good	0.971 \| good	4.088 \| good	0.128 \| good
2026-04-26T03:00:00.000Z	39 \| good	5.369 \| good	22.893 \| good	42.225 \| good	1.046 \| good	4.814 \| good	0.129 \| good
2026-04-26T04:00:00.000Z	35 \| good	4.458 \| good	19.646 \| good	37.588 \| good	1.209 \| good	5.292 \| good	0.129 \| good
2026-04-26T05:00:00.000Z	31 \| good	5.117 \| good	22.059 \| good	33.8 \| good	1.372 \| good	5.771 \| good	0.129 \| 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?