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

Ontario, California currently has a PM10 concentration of 30.874 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.832 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 33.887 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 22.209 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 11.632 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)

9.78 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

29.53 μg/m³

155

255

425

605+

Ozone (O₃)

33.63 ppb

201

201+

Sulfur Dioxide (SO₂)

0.97 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

19.85 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.34 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
2025-12-06T02:00:00.000Z	52 \| moderate	10.377 \| good	48.795 \| good	21.36 \| good	0.483 \| good	43.234 \| good	0.472 \| good
2025-12-06T03:00:00.000Z	54 \| moderate	11.012 \| good	45.414 \| good	13.174 \| good	0.697 \| good	44.841 \| good	0.563 \| good
2025-12-06T04:00:00.000Z	66 \| moderate	16.756 \| fine	59.429 \| fine	10.488 \| good	1.083 \| good	46.718 \| good	0.741 \| good
2025-12-06T05:00:00.000Z	69 \| moderate	19.473 \| fine	60.202 \| fine	7.316 \| good	1.214 \| good	42.784 \| good	0.773 \| good
2025-12-06T06:00:00.000Z	75 \| moderate	21.812 \| fine	71.106 \| fine	5.128 \| good	1.388 \| good	41.969 \| good	0.804 \| good
2025-12-06T07:00:00.000Z	73 \| moderate	21.352 \| fine	60.23 \| fine	4.948 \| good	1.427 \| good	41.969 \| good	0.804 \| good
2025-12-06T08:00:00.000Z	66 \| moderate	17.216 \| fine	46.051 \| good	2.787 \| good	1.302 \| good	36.954 \| good	0.764 \| good
2025-12-06T09:00:00.000Z	81 \| moderate	25.098 \| fine	66.318 \| fine	2.729 \| good	1.308 \| good	34.477 \| good	0.756 \| good
2025-12-06T10:00:00.000Z	66 \| moderate	16.791 \| fine	36.653 \| good	3.287 \| good	1.286 \| good	33.551 \| good	0.69 \| good
2025-12-06T11:00:00.000Z	62 \| moderate	14.532 \| fine	41.118 \| good	2.199 \| good	1.207 \| good	30.732 \| good	0.602 \| good
2025-12-06T12:00:00.000Z	69 \| moderate	18.971 \| fine	49.76 \| good	3.165 \| good	1.025 \| good	29.839 \| good	0.585 \| good
2025-12-06T13:00:00.000Z	73 \| moderate	21.187 \| fine	85.773 \| fine	3.629 \| good	1.025 \| good	29.839 \| good	0.585 \| good
2025-12-06T14:00:00.000Z	67 \| moderate	17.619 \| fine	54.51 \| good	4.792 \| good	1.122 \| good	27.292 \| good	0.657 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	15.41 \| fine	37.502 \| good	3.97 \| good	1.434 \| good	29.677 \| good	0.703 \| good
2025-12-06T16:00:00.000Z	66 \| moderate	16.946 \| fine	49.653 \| good	5.987 \| good	1.434 \| good	30.545 \| good	0.769 \| good
2025-12-06T17:00:00.000Z	69 \| moderate	19.23 \| fine	60.149 \| fine	8.072 \| good	1.278 \| good	35.902 \| good	0.653 \| good
2025-12-06T18:00:00.000Z	67 \| moderate	18.331 \| fine	57.883 \| fine	11.193 \| good	1.03 \| good	32.705 \| good	0.525 \| good
2025-12-06T19:00:00.000Z	56 \| moderate	11.875 \| good	37.164 \| good	14.535 \| good	1.223 \| good	31.815 \| good	0.446 \| good
2025-12-06T20:00:00.000Z	44 \| good	8.275 \| good	22.301 \| good	21.267 \| good	1.003 \| good	25.044 \| good	0.329 \| good
2025-12-06T21:00:00.000Z	38 \| good	7.181 \| good	23.67 \| good	25.513 \| good	0.81 \| good	19.829 \| good	0.289 \| good
2025-12-06T22:00:00.000Z	44 \| good	8.468 \| good	25.043 \| good	31.759 \| good	0.724 \| good	19.263 \| good	0.263 \| good
2025-12-06T23:00:00.000Z	52 \| moderate	10.434 \| good	17.233 \| good	34.235 \| good	0.867 \| good	19.95 \| good	0.317 \| good
2025-12-07T00:00:00.000Z	49 \| good	8.875 \| good	17.845 \| good	36.049 \| good	0.859 \| good	24.748 \| good	0.305 \| good
2025-12-07T01:00:00.000Z	45 \| good	7.222 \| good	48.943 \| good	31.721 \| good	0.951 \| good	30.723 \| good	0.425 \| good
2025-12-07T02:00:00.000Z	52 \| moderate	9.563 \| good	34.96 \| good	30.921 \| good	0.947 \| good	34.924 \| good	0.547 \| good
2025-12-07T03:00:00.000Z	54 \| moderate	10.686 \| good	36.738 \| good	20.744 \| good	0.908 \| good	32.244 \| good	0.641 \| good
2025-12-07T04:00:00.000Z	62 \| moderate	14.563 \| fine	51.624 \| good	16.183 \| good	1.14 \| good	33.502 \| good	0.828 \| good
2025-12-07T05:00:00.000Z	71 \| moderate	19.7 \| fine	64.471 \| fine	13.229 \| good	1.083 \| good	32.581 \| good	0.849 \| good
2025-12-07T06:00:00.000Z	67 \| moderate	17.73 \| fine	67.025 \| fine	4.823 \| good	0.993 \| good	35.713 \| good	0.853 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.384 \| fine	63.179 \| fine	5.31 \| good	1.001 \| good	35.713 \| good	0.853 \| good
2025-12-07T08:00:00.000Z	73 \| moderate	21.152 \| fine	64.888 \| fine	5.186 \| good	1.086 \| good	34.064 \| good	0.807 \| good
2025-12-07T09:00:00.000Z	67 \| moderate	18.368 \| fine	34.4 \| good	3.08 \| good	0.986 \| good	33.933 \| good	0.756 \| good
2025-12-07T10:00:00.000Z	73 \| moderate	20.999 \| fine	58.124 \| fine	2.957 \| good	0.946 \| good	33.321 \| good	0.721 \| good
2025-12-07T11:00:00.000Z	73 \| moderate	21.458 \| fine	40.547 \| good	3.348 \| good	0.942 \| good	33.321 \| good	0.72 \| good
2025-12-07T12:00:00.000Z	73 \| moderate	20.724 \| fine	43.434 \| good	2.727 \| good	0.923 \| good	33.321 \| good	0.72 \| good
2025-12-07T13:00:00.000Z	73 \| moderate	21.211 \| fine	44.095 \| good	5.717 \| good	0.844 \| good	6.839 \| good	0.837 \| good
2025-12-07T14:00:00.000Z	62 \| moderate	15.418 \| fine	33.428 \| good	3.304 \| good	0.884 \| good	24.234 \| good	0.619 \| good
2025-12-07T15:00:00.000Z	64 \| moderate	15.979 \| fine	38.283 \| good	3.442 \| good	1.123 \| good	27.797 \| good	0.677 \| good
2025-12-07T16:00:00.000Z	67 \| moderate	18.113 \| fine	47.83 \| good	5.148 \| good	1.119 \| good	29.62 \| good	0.653 \| good
2025-12-07T17:00:00.000Z	66 \| moderate	17.04 \| fine	32.436 \| good	10.031 \| good	0.987 \| good	31.938 \| good	0.6 \| good
2025-12-07T18:00:00.000Z	67 \| moderate	17.521 \| fine	29.092 \| good	14.308 \| good	0.962 \| good	33.499 \| good	0.563 \| good
2025-12-07T19:00:00.000Z	69 \| moderate	18.561 \| fine	33.589 \| good	20.134 \| good	0.925 \| good	25.132 \| good	0.401 \| good
2025-12-07T20:00:00.000Z	58 \| moderate	13.264 \| fine	31.313 \| good	23.84 \| good	0.879 \| good	27.159 \| good	0.365 \| good
2025-12-07T21:00:00.000Z	52 \| moderate	9.834 \| good	24.179 \| good	30.644 \| good	0.831 \| good	23.662 \| good	0.342 \| good
2025-12-07T22:00:00.000Z	56 \| moderate	11.632 \| good	30.874 \| good	33.887 \| good	0.832 \| good	22.209 \| good	0.279 \| good
2025-12-07T23:00:00.000Z	60 \| moderate	13.766 \| fine	45.17 \| good	35.167 \| good	0.99 \| good	20.176 \| good	0.3 \| good
2025-12-08T00:00:00.000Z	52 \| moderate	9.781 \| good	29.527 \| good	33.635 \| good	0.973 \| good	19.853 \| good	0.343 \| good
2025-12-08T01:00:00.000Z	52 \| moderate	9.781 \| good	29.527 \| good	33.635 \| good	0.973 \| good	19.853 \| good	0.343 \| good
2025-12-08T00:00:00.000Z	86 \| moderate	27.524 \| fine	120.147 \| fine	33.075 \| good	3.85 \| good	22.855 \| good	0.236 \| good
2025-12-08T01:00:00.000Z	90 \| moderate	30.02 \| fine	130.314 \| fine	25.953 \| good	4.196 \| good	29.52 \| good	0.329 \| good
2025-12-08T02:00:00.000Z	90 \| moderate	29.595 \| fine	128.466 \| fine	21.887 \| good	4.542 \| good	36.184 \| good	0.422 \| good
2025-12-08T03:00:00.000Z	86 \| moderate	28.377 \| fine	122.9 \| fine	16.559 \| good	4.888 \| good	42.849 \| good	0.515 \| good
2025-12-08T04:00:00.000Z	96 \| moderate	32.712 \| fine	141.148 \| fine	8.586 \| good	4.224 \| good	40.466 \| good	0.509 \| good
2025-12-08T05:00:00.000Z	92 \| moderate	31.374 \| fine	136.971 \| fine	6.753 \| good	3.56 \| good	38.084 \| good	0.504 \| good
2025-12-08T06:00:00.000Z	92 \| moderate	30.699 \| fine	133.368 \| fine	7.596 \| good	2.897 \| good	35.701 \| good	0.499 \| good
2025-12-08T07:00:00.000Z	92 \| moderate	31.382 \| fine	137.472 \| fine	8.006 \| good	2.403 \| good	33.549 \| good	0.446 \| good
2025-12-08T08:00:00.000Z	90 \| moderate	30.431 \| fine	131.712 \| fine	8.223 \| good	1.908 \| good	31.397 \| good	0.394 \| good
2025-12-08T09:00:00.000Z	88 \| moderate	28.51 \| fine	123.736 \| fine	8.216 \| good	1.414 \| good	29.244 \| good	0.342 \| good
2025-12-08T10:00:00.000Z	79 \| moderate	24.375 \| fine	107.129 \| fine	8.19 \| good	1.342 \| good	26.407 \| good	0.3 \| good
2025-12-08T11:00:00.000Z	75 \| moderate	21.938 \| fine	96.733 \| fine	7.783 \| good	1.27 \| good	23.57 \| good	0.258 \| good
2025-12-08T12:00:00.000Z	64 \| moderate	15.725 \| fine	70.383 \| fine	8.059 \| good	1.198 \| good	20.732 \| good	0.215 \| good
2025-12-08T13:00:00.000Z	54 \| moderate	10.613 \| good	47.165 \| good	8.235 \| good	1.321 \| good	20.625 \| good	0.216 \| good
2025-12-08T14:00:00.000Z	44 \| good	7.726 \| good	33.965 \| good	8.611 \| good	1.444 \| good	20.518 \| good	0.216 \| good
2025-12-08T15:00:00.000Z	49 \| good	8.777 \| good	38.743 \| good	8.738 \| good	1.567 \| good	20.411 \| good	0.216 \| good
2025-12-08T16:00:00.000Z	44 \| good	8.345 \| good	36.609 \| good	13.253 \| good	1.673 \| good	17.908 \| good	0.221 \| good
2025-12-08T17:00:00.000Z	38 \| good	7.411 \| good	32.493 \| good	19.168 \| good	1.78 \| good	15.405 \| good	0.227 \| good
2025-12-08T18:00:00.000Z	23 \| good	3.99 \| good	17.274 \| good	25.286 \| good	1.887 \| good	12.902 \| good	0.233 \| good
2025-12-08T19:00:00.000Z	31 \| good	2.61 \| good	10.364 \| good	34.308 \| good	1.905 \| good	10.877 \| good	0.208 \| good
2025-12-08T20:00:00.000Z	34 \| good	1.615 \| good	6.219 \| good	37.271 \| good	1.923 \| good	8.853 \| good	0.183 \| good
2025-12-08T21:00:00.000Z	35 \| good	2.184 \| good	9.127 \| good	38.443 \| good	1.941 \| good	6.828 \| good	0.159 \| good
2025-12-08T22:00:00.000Z	35 \| good	1.907 \| good	8.074 \| good	37.609 \| good	2.099 \| good	8.928 \| good	0.166 \| good
2025-12-08T23:00:00.000Z	30 \| good	3.191 \| good	14.098 \| good	32.454 \| good	2.257 \| good	11.028 \| good	0.173 \| good
2025-12-09T00:00:00.000Z	23 \| good	4.074 \| good	18.129 \| good	25.284 \| good	2.414 \| good	13.128 \| good	0.181 \| good
2025-12-09T01:00:00.000Z	22 \| good	4.306 \| good	19.188 \| good	20.732 \| good	2.407 \| good	19.307 \| good	0.228 \| good
2025-12-09T02:00:00.000Z	24 \| good	3.755 \| good	16.303 \| good	21.901 \| good	2.4 \| good	25.485 \| good	0.275 \| good
2025-12-09T03:00:00.000Z	30 \| good	3.13 \| good	12.424 \| good	19.592 \| good	2.393 \| good	31.664 \| good	0.323 \| good
2025-12-09T04:00:00.000Z	28 \| good	3.095 \| good	12.4 \| good	15.774 \| good	2.104 \| good	29.597 \| good	0.3 \| good
2025-12-09T05:00:00.000Z	26 \| good	3.505 \| good	15.122 \| good	12.816 \| good	1.816 \| good	27.529 \| good	0.278 \| good
2025-12-09T06:00:00.000Z	24 \| good	4.221 \| good	18.232 \| good	12.687 \| good	1.528 \| good	25.462 \| good	0.255 \| good
2025-12-09T07:00:00.000Z	22 \| good	3.252 \| good	14.158 \| good	11.157 \| good	1.429 \| good	23.013 \| good	0.229 \| good
2025-12-09T08:00:00.000Z	20 \| good	3.465 \| good	15.147 \| good	9.51 \| good	1.33 \| good	20.564 \| good	0.203 \| good
2025-12-09T09:00:00.000Z	17 \| good	2.787 \| good	11.296 \| good	9.402 \| good	1.231 \| good	18.115 \| good	0.177 \| good
2025-12-09T10:00:00.000Z	16 \| good	2.515 \| good	10.24 \| good	10.223 \| good	1.29 \| good	15.755 \| good	0.163 \| good
2025-12-09T11:00:00.000Z	16 \| good	3.23 \| good	14.087 \| good	9.936 \| good	1.35 \| good	13.396 \| good	0.149 \| good
2025-12-09T12:00:00.000Z	16 \| good	2.941 \| good	12.258 \| good	9.707 \| good	1.41 \| good	11.037 \| good	0.134 \| good
2025-12-09T13:00:00.000Z	13 \| good	2.043 \| good	8.212 \| good	9.377 \| good	1.542 \| good	13.589 \| good	0.148 \| good
2025-12-09T14:00:00.000Z	16 \| good	2.881 \| good	12.129 \| good	9.606 \| good	1.674 \| good	16.141 \| good	0.161 \| good
2025-12-09T15:00:00.000Z	22 \| good	4.475 \| good	19.26 \| good	9.296 \| good	1.807 \| good	18.693 \| good	0.175 \| good
2025-12-09T16:00:00.000Z	27 \| good	5.389 \| good	23.244 \| good	9.506 \| good	1.93 \| good	17.122 \| good	0.185 \| good
2025-12-09T17:00:00.000Z	33 \| good	5.632 \| good	24.211 \| good	13.695 \| good	2.054 \| good	15.55 \| good	0.194 \| good
2025-12-09T18:00:00.000Z	18 \| good	2.958 \| good	12.228 \| good	19.191 \| good	2.178 \| good	13.979 \| good	0.204 \| good
2025-12-09T19:00:00.000Z	25 \| good	2.664 \| good	11.165 \| good	26.597 \| good	2.231 \| good	11.947 \| good	0.182 \| good
2025-12-09T20:00:00.000Z	31 \| good	2.66 \| good	11.121 \| good	32.598 \| good	2.285 \| good	9.915 \| good	0.161 \| good
2025-12-09T21:00:00.000Z	32 \| good	2.427 \| good	10.155 \| good	34.849 \| good	2.339 \| good	7.883 \| good	0.139 \| good
2025-12-09T22:00:00.000Z	33 \| good	2.894 \| good	12.155 \| good	35.946 \| good	2.575 \| good	10.825 \| good	0.152 \| good
2025-12-09T23:00:00.000Z	31 \| good	3.455 \| good	15.087 \| good	32.532 \| good	2.811 \| good	13.767 \| good	0.165 \| good

Ontario

Empower business decisions with accurate air quality data

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

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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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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 01:00:00, 2025-12-07.

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

The best air quality in Ontario, California was observed at 01:00:00 on 2025-12-07.

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

The air quality in Ontario, California right now is Moderate, with an AQI of 56.

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 11.632 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 30.874 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.279 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.832 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 33.887 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 22.209 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-06T02:00:00.000Z	52 \| moderate	10.377 \| good	48.795 \| good	21.36 \| good	0.483 \| good	43.234 \| good	0.472 \| good
2025-12-06T03:00:00.000Z	54 \| moderate	11.012 \| good	45.414 \| good	13.174 \| good	0.697 \| good	44.841 \| good	0.563 \| good
2025-12-06T04:00:00.000Z	66 \| moderate	16.756 \| fine	59.429 \| fine	10.488 \| good	1.083 \| good	46.718 \| good	0.741 \| good
2025-12-06T05:00:00.000Z	69 \| moderate	19.473 \| fine	60.202 \| fine	7.316 \| good	1.214 \| good	42.784 \| good	0.773 \| good
2025-12-06T06:00:00.000Z	75 \| moderate	21.812 \| fine	71.106 \| fine	5.128 \| good	1.388 \| good	41.969 \| good	0.804 \| good
2025-12-06T07:00:00.000Z	73 \| moderate	21.352 \| fine	60.23 \| fine	4.948 \| good	1.427 \| good	41.969 \| good	0.804 \| good
2025-12-06T08:00:00.000Z	66 \| moderate	17.216 \| fine	46.051 \| good	2.787 \| good	1.302 \| good	36.954 \| good	0.764 \| good
2025-12-06T09:00:00.000Z	81 \| moderate	25.098 \| fine	66.318 \| fine	2.729 \| good	1.308 \| good	34.477 \| good	0.756 \| good
2025-12-06T10:00:00.000Z	66 \| moderate	16.791 \| fine	36.653 \| good	3.287 \| good	1.286 \| good	33.551 \| good	0.69 \| good
2025-12-06T11:00:00.000Z	62 \| moderate	14.532 \| fine	41.118 \| good	2.199 \| good	1.207 \| good	30.732 \| good	0.602 \| good
2025-12-06T12:00:00.000Z	69 \| moderate	18.971 \| fine	49.76 \| good	3.165 \| good	1.025 \| good	29.839 \| good	0.585 \| good
2025-12-06T13:00:00.000Z	73 \| moderate	21.187 \| fine	85.773 \| fine	3.629 \| good	1.025 \| good	29.839 \| good	0.585 \| good
2025-12-06T14:00:00.000Z	67 \| moderate	17.619 \| fine	54.51 \| good	4.792 \| good	1.122 \| good	27.292 \| good	0.657 \| good
2025-12-06T15:00:00.000Z	62 \| moderate	15.41 \| fine	37.502 \| good	3.97 \| good	1.434 \| good	29.677 \| good	0.703 \| good
2025-12-06T16:00:00.000Z	66 \| moderate	16.946 \| fine	49.653 \| good	5.987 \| good	1.434 \| good	30.545 \| good	0.769 \| good
2025-12-06T17:00:00.000Z	69 \| moderate	19.23 \| fine	60.149 \| fine	8.072 \| good	1.278 \| good	35.902 \| good	0.653 \| good
2025-12-06T18:00:00.000Z	67 \| moderate	18.331 \| fine	57.883 \| fine	11.193 \| good	1.03 \| good	32.705 \| good	0.525 \| good
2025-12-06T19:00:00.000Z	56 \| moderate	11.875 \| good	37.164 \| good	14.535 \| good	1.223 \| good	31.815 \| good	0.446 \| good
2025-12-06T20:00:00.000Z	44 \| good	8.275 \| good	22.301 \| good	21.267 \| good	1.003 \| good	25.044 \| good	0.329 \| good
2025-12-06T21:00:00.000Z	38 \| good	7.181 \| good	23.67 \| good	25.513 \| good	0.81 \| good	19.829 \| good	0.289 \| good
2025-12-06T22:00:00.000Z	44 \| good	8.468 \| good	25.043 \| good	31.759 \| good	0.724 \| good	19.263 \| good	0.263 \| good
2025-12-06T23:00:00.000Z	52 \| moderate	10.434 \| good	17.233 \| good	34.235 \| good	0.867 \| good	19.95 \| good	0.317 \| good
2025-12-07T00:00:00.000Z	49 \| good	8.875 \| good	17.845 \| good	36.049 \| good	0.859 \| good	24.748 \| good	0.305 \| good
2025-12-07T01:00:00.000Z	45 \| good	7.222 \| good	48.943 \| good	31.721 \| good	0.951 \| good	30.723 \| good	0.425 \| good
2025-12-07T02:00:00.000Z	52 \| moderate	9.563 \| good	34.96 \| good	30.921 \| good	0.947 \| good	34.924 \| good	0.547 \| good
2025-12-07T03:00:00.000Z	54 \| moderate	10.686 \| good	36.738 \| good	20.744 \| good	0.908 \| good	32.244 \| good	0.641 \| good
2025-12-07T04:00:00.000Z	62 \| moderate	14.563 \| fine	51.624 \| good	16.183 \| good	1.14 \| good	33.502 \| good	0.828 \| good
2025-12-07T05:00:00.000Z	71 \| moderate	19.7 \| fine	64.471 \| fine	13.229 \| good	1.083 \| good	32.581 \| good	0.849 \| good
2025-12-07T06:00:00.000Z	67 \| moderate	17.73 \| fine	67.025 \| fine	4.823 \| good	0.993 \| good	35.713 \| good	0.853 \| good
2025-12-07T07:00:00.000Z	67 \| moderate	18.384 \| fine	63.179 \| fine	5.31 \| good	1.001 \| good	35.713 \| good	0.853 \| good
2025-12-07T08:00:00.000Z	73 \| moderate	21.152 \| fine	64.888 \| fine	5.186 \| good	1.086 \| good	34.064 \| good	0.807 \| good
2025-12-07T09:00:00.000Z	67 \| moderate	18.368 \| fine	34.4 \| good	3.08 \| good	0.986 \| good	33.933 \| good	0.756 \| good
2025-12-07T10:00:00.000Z	73 \| moderate	20.999 \| fine	58.124 \| fine	2.957 \| good	0.946 \| good	33.321 \| good	0.721 \| good
2025-12-07T11:00:00.000Z	73 \| moderate	21.458 \| fine	40.547 \| good	3.348 \| good	0.942 \| good	33.321 \| good	0.72 \| good
2025-12-07T12:00:00.000Z	73 \| moderate	20.724 \| fine	43.434 \| good	2.727 \| good	0.923 \| good	33.321 \| good	0.72 \| good
2025-12-07T13:00:00.000Z	73 \| moderate	21.211 \| fine	44.095 \| good	5.717 \| good	0.844 \| good	6.839 \| good	0.837 \| good
2025-12-07T14:00:00.000Z	62 \| moderate	15.418 \| fine	33.428 \| good	3.304 \| good	0.884 \| good	24.234 \| good	0.619 \| good
2025-12-07T15:00:00.000Z	64 \| moderate	15.979 \| fine	38.283 \| good	3.442 \| good	1.123 \| good	27.797 \| good	0.677 \| good
2025-12-07T16:00:00.000Z	67 \| moderate	18.113 \| fine	47.83 \| good	5.148 \| good	1.119 \| good	29.62 \| good	0.653 \| good
2025-12-07T17:00:00.000Z	66 \| moderate	17.04 \| fine	32.436 \| good	10.031 \| good	0.987 \| good	31.938 \| good	0.6 \| good
2025-12-07T18:00:00.000Z	67 \| moderate	17.521 \| fine	29.092 \| good	14.308 \| good	0.962 \| good	33.499 \| good	0.563 \| good
2025-12-07T19:00:00.000Z	69 \| moderate	18.561 \| fine	33.589 \| good	20.134 \| good	0.925 \| good	25.132 \| good	0.401 \| good
2025-12-07T20:00:00.000Z	58 \| moderate	13.264 \| fine	31.313 \| good	23.84 \| good	0.879 \| good	27.159 \| good	0.365 \| good
2025-12-07T21:00:00.000Z	52 \| moderate	9.834 \| good	24.179 \| good	30.644 \| good	0.831 \| good	23.662 \| good	0.342 \| good
2025-12-07T22:00:00.000Z	56 \| moderate	11.632 \| good	30.874 \| good	33.887 \| good	0.832 \| good	22.209 \| good	0.279 \| good
2025-12-07T23:00:00.000Z	60 \| moderate	13.766 \| fine	45.17 \| good	35.167 \| good	0.99 \| good	20.176 \| good	0.3 \| good
2025-12-08T00:00:00.000Z	52 \| moderate	9.781 \| good	29.527 \| good	33.635 \| good	0.973 \| good	19.853 \| good	0.343 \| good
2025-12-08T01:00:00.000Z	52 \| moderate	9.781 \| good	29.527 \| good	33.635 \| good	0.973 \| good	19.853 \| good	0.343 \| good
2025-12-08T00:00:00.000Z	86 \| moderate	27.524 \| fine	120.147 \| fine	33.075 \| good	3.85 \| good	22.855 \| good	0.236 \| good
2025-12-08T01:00:00.000Z	90 \| moderate	30.02 \| fine	130.314 \| fine	25.953 \| good	4.196 \| good	29.52 \| good	0.329 \| good
2025-12-08T02:00:00.000Z	90 \| moderate	29.595 \| fine	128.466 \| fine	21.887 \| good	4.542 \| good	36.184 \| good	0.422 \| good
2025-12-08T03:00:00.000Z	86 \| moderate	28.377 \| fine	122.9 \| fine	16.559 \| good	4.888 \| good	42.849 \| good	0.515 \| good
2025-12-08T04:00:00.000Z	96 \| moderate	32.712 \| fine	141.148 \| fine	8.586 \| good	4.224 \| good	40.466 \| good	0.509 \| good
2025-12-08T05:00:00.000Z	92 \| moderate	31.374 \| fine	136.971 \| fine	6.753 \| good	3.56 \| good	38.084 \| good	0.504 \| good
2025-12-08T06:00:00.000Z	92 \| moderate	30.699 \| fine	133.368 \| fine	7.596 \| good	2.897 \| good	35.701 \| good	0.499 \| good
2025-12-08T07:00:00.000Z	92 \| moderate	31.382 \| fine	137.472 \| fine	8.006 \| good	2.403 \| good	33.549 \| good	0.446 \| good
2025-12-08T08:00:00.000Z	90 \| moderate	30.431 \| fine	131.712 \| fine	8.223 \| good	1.908 \| good	31.397 \| good	0.394 \| good
2025-12-08T09:00:00.000Z	88 \| moderate	28.51 \| fine	123.736 \| fine	8.216 \| good	1.414 \| good	29.244 \| good	0.342 \| good
2025-12-08T10:00:00.000Z	79 \| moderate	24.375 \| fine	107.129 \| fine	8.19 \| good	1.342 \| good	26.407 \| good	0.3 \| good
2025-12-08T11:00:00.000Z	75 \| moderate	21.938 \| fine	96.733 \| fine	7.783 \| good	1.27 \| good	23.57 \| good	0.258 \| good
2025-12-08T12:00:00.000Z	64 \| moderate	15.725 \| fine	70.383 \| fine	8.059 \| good	1.198 \| good	20.732 \| good	0.215 \| good
2025-12-08T13:00:00.000Z	54 \| moderate	10.613 \| good	47.165 \| good	8.235 \| good	1.321 \| good	20.625 \| good	0.216 \| good
2025-12-08T14:00:00.000Z	44 \| good	7.726 \| good	33.965 \| good	8.611 \| good	1.444 \| good	20.518 \| good	0.216 \| good
2025-12-08T15:00:00.000Z	49 \| good	8.777 \| good	38.743 \| good	8.738 \| good	1.567 \| good	20.411 \| good	0.216 \| good
2025-12-08T16:00:00.000Z	44 \| good	8.345 \| good	36.609 \| good	13.253 \| good	1.673 \| good	17.908 \| good	0.221 \| good
2025-12-08T17:00:00.000Z	38 \| good	7.411 \| good	32.493 \| good	19.168 \| good	1.78 \| good	15.405 \| good	0.227 \| good
2025-12-08T18:00:00.000Z	23 \| good	3.99 \| good	17.274 \| good	25.286 \| good	1.887 \| good	12.902 \| good	0.233 \| good
2025-12-08T19:00:00.000Z	31 \| good	2.61 \| good	10.364 \| good	34.308 \| good	1.905 \| good	10.877 \| good	0.208 \| good
2025-12-08T20:00:00.000Z	34 \| good	1.615 \| good	6.219 \| good	37.271 \| good	1.923 \| good	8.853 \| good	0.183 \| good
2025-12-08T21:00:00.000Z	35 \| good	2.184 \| good	9.127 \| good	38.443 \| good	1.941 \| good	6.828 \| good	0.159 \| good
2025-12-08T22:00:00.000Z	35 \| good	1.907 \| good	8.074 \| good	37.609 \| good	2.099 \| good	8.928 \| good	0.166 \| good
2025-12-08T23:00:00.000Z	30 \| good	3.191 \| good	14.098 \| good	32.454 \| good	2.257 \| good	11.028 \| good	0.173 \| good
2025-12-09T00:00:00.000Z	23 \| good	4.074 \| good	18.129 \| good	25.284 \| good	2.414 \| good	13.128 \| good	0.181 \| good
2025-12-09T01:00:00.000Z	22 \| good	4.306 \| good	19.188 \| good	20.732 \| good	2.407 \| good	19.307 \| good	0.228 \| good
2025-12-09T02:00:00.000Z	24 \| good	3.755 \| good	16.303 \| good	21.901 \| good	2.4 \| good	25.485 \| good	0.275 \| good
2025-12-09T03:00:00.000Z	30 \| good	3.13 \| good	12.424 \| good	19.592 \| good	2.393 \| good	31.664 \| good	0.323 \| good
2025-12-09T04:00:00.000Z	28 \| good	3.095 \| good	12.4 \| good	15.774 \| good	2.104 \| good	29.597 \| good	0.3 \| good
2025-12-09T05:00:00.000Z	26 \| good	3.505 \| good	15.122 \| good	12.816 \| good	1.816 \| good	27.529 \| good	0.278 \| good
2025-12-09T06:00:00.000Z	24 \| good	4.221 \| good	18.232 \| good	12.687 \| good	1.528 \| good	25.462 \| good	0.255 \| good
2025-12-09T07:00:00.000Z	22 \| good	3.252 \| good	14.158 \| good	11.157 \| good	1.429 \| good	23.013 \| good	0.229 \| good
2025-12-09T08:00:00.000Z	20 \| good	3.465 \| good	15.147 \| good	9.51 \| good	1.33 \| good	20.564 \| good	0.203 \| good
2025-12-09T09:00:00.000Z	17 \| good	2.787 \| good	11.296 \| good	9.402 \| good	1.231 \| good	18.115 \| good	0.177 \| good
2025-12-09T10:00:00.000Z	16 \| good	2.515 \| good	10.24 \| good	10.223 \| good	1.29 \| good	15.755 \| good	0.163 \| good
2025-12-09T11:00:00.000Z	16 \| good	3.23 \| good	14.087 \| good	9.936 \| good	1.35 \| good	13.396 \| good	0.149 \| good
2025-12-09T12:00:00.000Z	16 \| good	2.941 \| good	12.258 \| good	9.707 \| good	1.41 \| good	11.037 \| good	0.134 \| good
2025-12-09T13:00:00.000Z	13 \| good	2.043 \| good	8.212 \| good	9.377 \| good	1.542 \| good	13.589 \| good	0.148 \| good
2025-12-09T14:00:00.000Z	16 \| good	2.881 \| good	12.129 \| good	9.606 \| good	1.674 \| good	16.141 \| good	0.161 \| good
2025-12-09T15:00:00.000Z	22 \| good	4.475 \| good	19.26 \| good	9.296 \| good	1.807 \| good	18.693 \| good	0.175 \| good
2025-12-09T16:00:00.000Z	27 \| good	5.389 \| good	23.244 \| good	9.506 \| good	1.93 \| good	17.122 \| good	0.185 \| good
2025-12-09T17:00:00.000Z	33 \| good	5.632 \| good	24.211 \| good	13.695 \| good	2.054 \| good	15.55 \| good	0.194 \| good
2025-12-09T18:00:00.000Z	18 \| good	2.958 \| good	12.228 \| good	19.191 \| good	2.178 \| good	13.979 \| good	0.204 \| good
2025-12-09T19:00:00.000Z	25 \| good	2.664 \| good	11.165 \| good	26.597 \| good	2.231 \| good	11.947 \| good	0.182 \| good
2025-12-09T20:00:00.000Z	31 \| good	2.66 \| good	11.121 \| good	32.598 \| good	2.285 \| good	9.915 \| good	0.161 \| good
2025-12-09T21:00:00.000Z	32 \| good	2.427 \| good	10.155 \| good	34.849 \| good	2.339 \| good	7.883 \| good	0.139 \| good
2025-12-09T22:00:00.000Z	33 \| good	2.894 \| good	12.155 \| good	35.946 \| good	2.575 \| good	10.825 \| good	0.152 \| good
2025-12-09T23:00:00.000Z	31 \| good	3.455 \| good	15.087 \| good	32.532 \| good	2.811 \| good	13.767 \| good	0.165 \| 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?