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

Ontario, California currently has a PM10 concentration of 32.508 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.248 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 46.912 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 8.842 ppb.

Current air quality index in Ontario, California today

Name: Live air pollution levels in Ontario, California today
Creator: Ambee

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)

6.87 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

29.79 μg/m³

155

255

425

605+

Ozone (O₃)

53.03 ppb

201

201+

Sulfur Dioxide (SO₂)

0.60 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

16.02 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 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
2025-07-21T23:00:00.000Z	48 \| good	8.034 \| good	34.6 \| good	52.375 \| good	0.257 \| good	19.236 \| good	0.208 \| good
2025-07-22T00:00:00.000Z	45 \| good	6.952 \| good	28.928 \| good	49.022 \| good	0.268 \| good	15.571 \| good	0.189 \| good
2025-07-22T01:00:00.000Z	44 \| good	6.206 \| good	26.348 \| good	47.943 \| good	0.309 \| good	15.474 \| good	0.189 \| good
2025-07-22T02:00:00.000Z	40 \| good	6.487 \| good	28.039 \| good	42.933 \| good	0.334 \| good	17.106 \| good	0.189 \| good
2025-07-22T03:00:00.000Z	44 \| good	8.187 \| good	35.882 \| good	35.434 \| good	2.099 \| good	6.392 \| good	0.142 \| good
2025-07-22T04:00:00.000Z	37 \| good	5.269 \| good	23.406 \| good	40.121 \| good	0.362 \| good	16.842 \| good	0.189 \| good
2025-07-22T05:00:00.000Z	37 \| good	5.074 \| good	22.808 \| good	40.459 \| good	0.36 \| good	16.842 \| good	0.189 \| good
2025-07-22T06:00:00.000Z	38 \| good	5.142 \| good	23.845 \| good	41.132 \| good	0.361 \| good	16.789 \| good	0.189 \| good
2025-07-22T07:00:00.000Z	38 \| good	7.169 \| good	30.348 \| good	38.733 \| good	0.348 \| good	15.691 \| good	0.164 \| good
2025-07-22T08:00:00.000Z	33 \| good	5.728 \| good	31.601 \| good	31.785 \| good	0.277 \| good	14.218 \| good	0.164 \| good
2025-07-22T09:00:00.000Z	33 \| good	5.699 \| good	27.659 \| good	28.552 \| good	0.295 \| good	16.451 \| good	0.164 \| good
2025-07-22T10:00:00.000Z	33 \| good	5.662 \| good	24.371 \| good	27.974 \| good	0.303 \| good	15.06 \| good	0.164 \| good
2025-07-22T11:00:00.000Z	33 \| good	6.468 \| good	16.464 \| good	26.712 \| good	0.29 \| good	14.208 \| good	0.163 \| good
2025-07-22T12:00:00.000Z	33 \| good	6.487 \| good	16.974 \| good	29.288 \| good	0.246 \| good	18.287 \| good	0.163 \| good
2025-07-22T13:00:00.000Z	38 \| good	7.022 \| good	16.425 \| good	27.158 \| good	0.323 \| good	19.91 \| good	0.189 \| good
2025-07-22T14:00:00.000Z	33 \| good	5.597 \| good	23.428 \| good	26.395 \| good	0.26 \| good	17.772 \| good	0.189 \| good
2025-07-22T15:00:00.000Z	38 \| good	7.271 \| good	17.385 \| good	24.903 \| good	0.294 \| good	11.996 \| good	0.164 \| good
2025-07-22T16:00:00.000Z	33 \| good	5.51 \| good	24.036 \| good	25.068 \| good	0.283 \| good	12.54 \| good	0.189 \| good
2025-07-22T17:00:00.000Z	30 \| good	5.404 \| good	22.917 \| good	31.774 \| good	0.297 \| good	21.851 \| good	0.189 \| good
2025-07-22T18:00:00.000Z	34 \| good	5.478 \| good	22.722 \| good	36.926 \| good	0.264 \| good	22.497 \| good	0.189 \| good
2025-07-22T19:00:00.000Z	35 \| good	5.706 \| good	24.881 \| good	38.382 \| good	0.251 \| good	11.241 \| good	0.136 \| good
2025-07-22T20:00:00.000Z	43 \| good	7.161 \| good	29.15 \| good	46.33 \| good	0.301 \| good	20.177 \| good	0.156 \| good
2025-07-22T21:00:00.000Z	48 \| good	7.056 \| good	28.365 \| good	51.544 \| good	0.357 \| good	19.369 \| good	0.189 \| good
2025-07-22T22:00:00.000Z	48 \| good	6.63 \| good	28.257 \| good	51.809 \| good	0.318 \| good	12.35 \| good	0.189 \| good
2025-07-22T23:00:00.000Z	46 \| good	6.436 \| good	27.382 \| good	50.234 \| good	0.31 \| good	12.048 \| good	0.189 \| good
2025-07-23T00:00:00.000Z	47 \| good	6.982 \| good	29.783 \| good	51.402 \| good	0.397 \| good	16.707 \| good	0.207 \| good
2025-07-23T01:00:00.000Z	45 \| good	8.115 \| good	36.085 \| good	49.125 \| good	0.463 \| good	19.654 \| good	0.207 \| good
2025-07-23T02:00:00.000Z	44 \| good	8.026 \| good	34.684 \| good	45.678 \| good	0.431 \| good	19.19 \| good	0.189 \| good
2025-07-23T03:00:00.000Z	38 \| good	7.266 \| good	30.617 \| good	39.922 \| good	0.373 \| good	16.622 \| good	0.189 \| good
2025-07-23T04:00:00.000Z	37 \| good	6.008 \| good	25.836 \| good	39.644 \| good	0.386 \| good	19.619 \| good	0.189 \| good
2025-07-23T05:00:00.000Z	32 \| good	5.018 \| good	21.941 \| good	35.296 \| good	0.409 \| good	22.513 \| good	0.164 \| good
2025-07-23T06:00:00.000Z	30 \| good	4.99 \| good	22.487 \| good	32.018 \| good	0.339 \| good	19.198 \| good	0.189 \| good
2025-07-23T07:00:00.000Z	38 \| good	6.694 \| good	30.31 \| good	29.544 \| good	0.246 \| good	16.295 \| good	0.164 \| good
2025-07-23T08:00:00.000Z	24 \| good	4.08 \| good	17.13 \| good	26.168 \| good	0.27 \| good	8.799 \| good	0.164 \| good
2025-07-23T09:00:00.000Z	24 \| good	4.096 \| good	17.355 \| good	26.487 \| good	0.266 \| good	6.422 \| good	0.164 \| good
2025-07-23T10:00:00.000Z	22 \| good	4.301 \| good	17.701 \| good	23.502 \| good	0.215 \| good	7.282 \| good	0.164 \| good
2025-07-23T11:00:00.000Z	22 \| good	3.801 \| good	16.719 \| good	22.968 \| good	0.186 \| good	7.479 \| good	0.164 \| good
2025-07-23T12:00:00.000Z	27 \| good	4.614 \| good	18.169 \| good	24.331 \| good	0.19 \| good	13.422 \| good	0.164 \| good
2025-07-23T13:00:00.000Z	27 \| good	5.051 \| good	21.074 \| good	22.875 \| good	0.218 \| good	22.247 \| good	0.183 \| good
2025-07-23T14:00:00.000Z	33 \| good	6.363 \| good	26.572 \| good	25.608 \| good	0.241 \| good	26.164 \| good	0.164 \| good
2025-07-23T15:00:00.000Z	44 \| good	7.609 \| good	30.934 \| good	25.647 \| good	0.279 \| good	21.794 \| good	0.164 \| good
2025-07-23T16:00:00.000Z	44 \| good	7.929 \| good	32.006 \| good	27.883 \| good	0.305 \| good	13.936 \| good	0.164 \| good
2025-07-23T17:00:00.000Z	49 \| good	8.627 \| good	38.206 \| good	32.657 \| good	0.302 \| good	24.231 \| good	0.189 \| good
2025-07-23T18:00:00.000Z	49 \| good	9.24 \| good	38.702 \| good	34.597 \| good	0.388 \| good	15.477 \| good	0.189 \| good
2025-07-23T19:00:00.000Z	44 \| good	8.127 \| good	35.207 \| good	34.571 \| good	0.504 \| good	15.488 \| good	0.164 \| good
2025-07-23T20:00:00.000Z	44 \| good	7.675 \| good	33.58 \| good	45.818 \| good	0.509 \| good	12.501 \| good	0.164 \| good
2025-07-23T21:00:00.000Z	45 \| good	6.904 \| good	30.399 \| good	49.108 \| good	0.494 \| good	13.483 \| good	0.208 \| good
2025-07-23T22:00:00.000Z	49 \| good	6.87 \| good	29.787 \| good	53.029 \| good	0.596 \| good	16.016 \| good	0.208 \| good
2025-07-23T22:00:00.000Z	49 \| good	6.87 \| good	29.787 \| good	53.029 \| good	0.596 \| good	16.016 \| good	0.208 \| good
2025-07-21T03:00:00.000Z	44 \| good	8.258 \| good	35.994 \| good	34.064 \| good	3.716 \| good	8.404 \| good	0.163 \| good
2025-07-21T04:00:00.000Z	44 \| good	8.413 \| good	36.948 \| good	30.205 \| good	3.788 \| good	9.592 \| good	0.163 \| good
2025-07-21T05:00:00.000Z	38 \| good	7.331 \| good	32.037 \| good	27.598 \| good	3.86 \| good	10.779 \| good	0.164 \| good
2025-07-21T06:00:00.000Z	33 \| good	6.212 \| good	27.859 \| good	26.489 \| good	3.933 \| good	11.966 \| good	0.165 \| good
2025-07-21T07:00:00.000Z	38 \| good	6.51 \| good	28.94 \| good	26.468 \| good	3.901 \| good	12.647 \| good	0.165 \| good
2025-07-21T08:00:00.000Z	38 \| good	6.56 \| good	28.955 \| good	24.858 \| good	3.869 \| good	13.328 \| good	0.166 \| good
2025-07-21T09:00:00.000Z	22 \| good	4.494 \| good	19.177 \| good	23.646 \| good	3.837 \| good	14.009 \| good	0.166 \| good
2025-07-21T10:00:00.000Z	22 \| good	4.088 \| good	18.01 \| good	22.026 \| good	3.79 \| good	14.491 \| good	0.165 \| good
2025-07-21T11:00:00.000Z	27 \| good	4.83 \| good	20.951 \| good	21.394 \| good	3.742 \| good	14.972 \| good	0.164 \| good
2025-07-21T12:00:00.000Z	22 \| good	3.89 \| good	16.949 \| good	18.449 \| good	3.694 \| good	15.454 \| good	0.163 \| good
2025-07-21T13:00:00.000Z	22 \| good	4.204 \| good	18.064 \| good	18.709 \| good	3.728 \| good	13.782 \| good	0.158 \| good
2025-07-21T14:00:00.000Z	33 \| good	6.326 \| good	27.941 \| good	18.273 \| good	3.762 \| good	12.11 \| good	0.154 \| good
2025-07-21T15:00:00.000Z	44 \| good	8.25 \| good	36.087 \| good	21.369 \| good	3.795 \| good	10.439 \| good	0.15 \| good
2025-07-21T16:00:00.000Z	52 \| moderate	9.5 \| good	42.792 \| good	24.579 \| good	3.472 \| good	8.794 \| good	0.148 \| good
2025-07-21T17:00:00.000Z	54 \| moderate	10.897 \| good	48.192 \| good	30.033 \| good	3.149 \| good	7.149 \| good	0.147 \| good
2025-07-21T18:00:00.000Z	58 \| moderate	13.281 \| fine	59.254 \| fine	39.394 \| good	2.825 \| good	5.505 \| good	0.145 \| good
2025-07-21T19:00:00.000Z	56 \| moderate	12.412 \| fine	55.258 \| fine	48.508 \| good	2.52 \| good	4.355 \| good	0.141 \| good
2025-07-21T20:00:00.000Z	62 \| moderate	14.926 \| fine	67.007 \| fine	57.189 \| fine	2.215 \| good	3.206 \| good	0.137 \| good
2025-07-21T21:00:00.000Z	77 \| moderate	13.688 \| fine	61.03 \| fine	63.239 \| fine	1.909 \| good	2.057 \| good	0.133 \| good
2025-07-21T22:00:00.000Z	80 \| moderate	11.1 \| good	49.016 \| good	63.955 \| fine	2.002 \| good	2.23 \| good	0.132 \| good
2025-07-21T23:00:00.000Z	61 \| moderate	9.653 \| good	42.962 \| good	58.035 \| fine	2.096 \| good	2.404 \| good	0.131 \| good
2025-07-22T00:00:00.000Z	48 \| good	8.149 \| good	35.856 \| good	51.501 \| good	2.189 \| good	2.578 \| good	0.13 \| good
2025-07-22T01:00:00.000Z	44 \| good	7.66 \| good	33.867 \| good	47.325 \| good	2.439 \| good	4.153 \| good	0.133 \| good
2025-07-22T02:00:00.000Z	39 \| good	6.582 \| good	29.757 \| good	41.923 \| good	2.689 \| good	5.728 \| good	0.136 \| good
2025-07-22T03:00:00.000Z	38 \| good	7.467 \| good	32.936 \| good	35.883 \| good	2.94 \| good	7.304 \| good	0.138 \| good
2025-07-22T04:00:00.000Z	38 \| good	7.394 \| good	32.842 \| good	33.058 \| good	3.048 \| good	8.509 \| good	0.14 \| good
2025-07-22T05:00:00.000Z	38 \| good	6.855 \| good	29.954 \| good	32.959 \| good	3.156 \| good	9.714 \| good	0.142 \| good
2025-07-22T06:00:00.000Z	38 \| good	6.835 \| good	29.957 \| good	32.277 \| good	3.264 \| good	10.919 \| good	0.144 \| good
2025-07-22T07:00:00.000Z	38 \| good	7.203 \| good	31.941 \| good	31.242 \| good	3.292 \| good	11.616 \| good	0.146 \| good
2025-07-22T08:00:00.000Z	38 \| good	6.709 \| good	29.853 \| good	30.295 \| good	3.32 \| good	12.313 \| good	0.148 \| good
2025-07-22T09:00:00.000Z	33 \| good	5.775 \| good	25.028 \| good	28.784 \| good	3.347 \| good	13.009 \| good	0.15 \| good
2025-07-22T10:00:00.000Z	27 \| good	5.428 \| good	23.071 \| good	26.845 \| good	3.383 \| good	13.541 \| good	0.15 \| good
2025-07-22T11:00:00.000Z	38 \| good	6.589 \| good	29.811 \| good	24.068 \| good	3.418 \| good	14.072 \| good	0.151 \| good
2025-07-22T12:00:00.000Z	33 \| good	6.012 \| good	26.884 \| good	25.384 \| good	3.453 \| good	14.604 \| good	0.151 \| good
2025-07-22T13:00:00.000Z	27 \| good	5.227 \| good	22.972 \| good	19.09 \| good	3.622 \| good	13.076 \| good	0.15 \| good
2025-07-22T14:00:00.000Z	44 \| good	7.721 \| good	33.973 \| good	23.842 \| good	3.791 \| good	11.548 \| good	0.148 \| good
2025-07-22T15:00:00.000Z	56 \| moderate	12.245 \| fine	54.892 \| good	26.364 \| good	3.96 \| good	10.019 \| good	0.146 \| good
2025-07-22T16:00:00.000Z	60 \| moderate	13.565 \| fine	60.947 \| fine	29.869 \| good	3.714 \| good	8.622 \| good	0.144 \| good
2025-07-22T17:00:00.000Z	58 \| moderate	13.479 \| fine	60.891 \| fine	36.89 \| good	3.467 \| good	7.225 \| good	0.142 \| good
2025-07-22T18:00:00.000Z	58 \| moderate	12.792 \| fine	57.237 \| fine	46.525 \| good	3.221 \| good	5.827 \| good	0.14 \| good
2025-07-22T19:00:00.000Z	54 \| moderate	11.462 \| good	51.147 \| good	54.319 \| good	3.008 \| good	4.702 \| good	0.137 \| good
2025-07-22T20:00:00.000Z	74 \| moderate	11.918 \| good	52.247 \| good	61.589 \| fine	2.795 \| good	3.577 \| good	0.133 \| good
2025-07-22T21:00:00.000Z	93 \| moderate	11.724 \| good	51.895 \| good	67.779 \| fine	2.583 \| good	2.452 \| good	0.13 \| good
2025-07-22T22:00:00.000Z	80 \| moderate	9.562 \| good	42.898 \| good	64.41 \| fine	2.724 \| good	2.554 \| good	0.129 \| good
2025-07-22T23:00:00.000Z	64 \| moderate	8.636 \| good	37.935 \| good	58.708 \| fine	2.865 \| good	2.655 \| good	0.129 \| good
2025-07-23T00:00:00.000Z	126 \| sensitive	19.947 \| fine	21.656 \| good	78.43 \| moderate	3.008 \| good	2.759 \| good	0.128 \| good
2025-07-23T01:00:00.000Z	54 \| moderate	10.731 \| good	47.821 \| good	46.933 \| good	3.23 \| good	4.331 \| good	0.132 \| good
2025-07-23T02:00:00.000Z	54 \| moderate	11.123 \| good	48.918 \| good	46.155 \| good	3.454 \| good	5.905 \| good	0.136 \| good

Ontario

Empower business decisions with accurate air quality data

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

0.20ppm

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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Check live rankings of places in the USA with the cleanest air.

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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, 2025-07-20.

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

The best air quality in Ontario, California was observed at 12:00:00 on 2025-07-20.

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, 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 7.623 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 32.508 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.189 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.248 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 46.912 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 8.842 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-21T23:00:00.000Z	48 \| good	8.034 \| good	34.6 \| good	52.375 \| good	0.257 \| good	19.236 \| good	0.208 \| good
2025-07-22T00:00:00.000Z	45 \| good	6.952 \| good	28.928 \| good	49.022 \| good	0.268 \| good	15.571 \| good	0.189 \| good
2025-07-22T01:00:00.000Z	44 \| good	6.206 \| good	26.348 \| good	47.943 \| good	0.309 \| good	15.474 \| good	0.189 \| good
2025-07-22T02:00:00.000Z	40 \| good	6.487 \| good	28.039 \| good	42.933 \| good	0.334 \| good	17.106 \| good	0.189 \| good
2025-07-22T03:00:00.000Z	44 \| good	8.187 \| good	35.882 \| good	35.434 \| good	2.099 \| good	6.392 \| good	0.142 \| good
2025-07-22T04:00:00.000Z	37 \| good	5.269 \| good	23.406 \| good	40.121 \| good	0.362 \| good	16.842 \| good	0.189 \| good
2025-07-22T05:00:00.000Z	37 \| good	5.074 \| good	22.808 \| good	40.459 \| good	0.36 \| good	16.842 \| good	0.189 \| good
2025-07-22T06:00:00.000Z	38 \| good	5.142 \| good	23.845 \| good	41.132 \| good	0.361 \| good	16.789 \| good	0.189 \| good
2025-07-22T07:00:00.000Z	38 \| good	7.169 \| good	30.348 \| good	38.733 \| good	0.348 \| good	15.691 \| good	0.164 \| good
2025-07-22T08:00:00.000Z	33 \| good	5.728 \| good	31.601 \| good	31.785 \| good	0.277 \| good	14.218 \| good	0.164 \| good
2025-07-22T09:00:00.000Z	33 \| good	5.699 \| good	27.659 \| good	28.552 \| good	0.295 \| good	16.451 \| good	0.164 \| good
2025-07-22T10:00:00.000Z	33 \| good	5.662 \| good	24.371 \| good	27.974 \| good	0.303 \| good	15.06 \| good	0.164 \| good
2025-07-22T11:00:00.000Z	33 \| good	6.468 \| good	16.464 \| good	26.712 \| good	0.29 \| good	14.208 \| good	0.163 \| good
2025-07-22T12:00:00.000Z	33 \| good	6.487 \| good	16.974 \| good	29.288 \| good	0.246 \| good	18.287 \| good	0.163 \| good
2025-07-22T13:00:00.000Z	38 \| good	7.022 \| good	16.425 \| good	27.158 \| good	0.323 \| good	19.91 \| good	0.189 \| good
2025-07-22T14:00:00.000Z	33 \| good	5.597 \| good	23.428 \| good	26.395 \| good	0.26 \| good	17.772 \| good	0.189 \| good
2025-07-22T15:00:00.000Z	38 \| good	7.271 \| good	17.385 \| good	24.903 \| good	0.294 \| good	11.996 \| good	0.164 \| good
2025-07-22T16:00:00.000Z	33 \| good	5.51 \| good	24.036 \| good	25.068 \| good	0.283 \| good	12.54 \| good	0.189 \| good
2025-07-22T17:00:00.000Z	30 \| good	5.404 \| good	22.917 \| good	31.774 \| good	0.297 \| good	21.851 \| good	0.189 \| good
2025-07-22T18:00:00.000Z	34 \| good	5.478 \| good	22.722 \| good	36.926 \| good	0.264 \| good	22.497 \| good	0.189 \| good
2025-07-22T19:00:00.000Z	35 \| good	5.706 \| good	24.881 \| good	38.382 \| good	0.251 \| good	11.241 \| good	0.136 \| good
2025-07-22T20:00:00.000Z	43 \| good	7.161 \| good	29.15 \| good	46.33 \| good	0.301 \| good	20.177 \| good	0.156 \| good
2025-07-22T21:00:00.000Z	48 \| good	7.056 \| good	28.365 \| good	51.544 \| good	0.357 \| good	19.369 \| good	0.189 \| good
2025-07-22T22:00:00.000Z	48 \| good	6.63 \| good	28.257 \| good	51.809 \| good	0.318 \| good	12.35 \| good	0.189 \| good
2025-07-22T23:00:00.000Z	46 \| good	6.436 \| good	27.382 \| good	50.234 \| good	0.31 \| good	12.048 \| good	0.189 \| good
2025-07-23T00:00:00.000Z	47 \| good	6.982 \| good	29.783 \| good	51.402 \| good	0.397 \| good	16.707 \| good	0.207 \| good
2025-07-23T01:00:00.000Z	45 \| good	8.115 \| good	36.085 \| good	49.125 \| good	0.463 \| good	19.654 \| good	0.207 \| good
2025-07-23T02:00:00.000Z	44 \| good	8.026 \| good	34.684 \| good	45.678 \| good	0.431 \| good	19.19 \| good	0.189 \| good
2025-07-23T03:00:00.000Z	38 \| good	7.266 \| good	30.617 \| good	39.922 \| good	0.373 \| good	16.622 \| good	0.189 \| good
2025-07-23T04:00:00.000Z	37 \| good	6.008 \| good	25.836 \| good	39.644 \| good	0.386 \| good	19.619 \| good	0.189 \| good
2025-07-23T05:00:00.000Z	32 \| good	5.018 \| good	21.941 \| good	35.296 \| good	0.409 \| good	22.513 \| good	0.164 \| good
2025-07-23T06:00:00.000Z	30 \| good	4.99 \| good	22.487 \| good	32.018 \| good	0.339 \| good	19.198 \| good	0.189 \| good
2025-07-23T07:00:00.000Z	38 \| good	6.694 \| good	30.31 \| good	29.544 \| good	0.246 \| good	16.295 \| good	0.164 \| good
2025-07-23T08:00:00.000Z	24 \| good	4.08 \| good	17.13 \| good	26.168 \| good	0.27 \| good	8.799 \| good	0.164 \| good
2025-07-23T09:00:00.000Z	24 \| good	4.096 \| good	17.355 \| good	26.487 \| good	0.266 \| good	6.422 \| good	0.164 \| good
2025-07-23T10:00:00.000Z	22 \| good	4.301 \| good	17.701 \| good	23.502 \| good	0.215 \| good	7.282 \| good	0.164 \| good
2025-07-23T11:00:00.000Z	22 \| good	3.801 \| good	16.719 \| good	22.968 \| good	0.186 \| good	7.479 \| good	0.164 \| good
2025-07-23T12:00:00.000Z	27 \| good	4.614 \| good	18.169 \| good	24.331 \| good	0.19 \| good	13.422 \| good	0.164 \| good
2025-07-23T13:00:00.000Z	27 \| good	5.051 \| good	21.074 \| good	22.875 \| good	0.218 \| good	22.247 \| good	0.183 \| good
2025-07-23T14:00:00.000Z	33 \| good	6.363 \| good	26.572 \| good	25.608 \| good	0.241 \| good	26.164 \| good	0.164 \| good
2025-07-23T15:00:00.000Z	44 \| good	7.609 \| good	30.934 \| good	25.647 \| good	0.279 \| good	21.794 \| good	0.164 \| good
2025-07-23T16:00:00.000Z	44 \| good	7.929 \| good	32.006 \| good	27.883 \| good	0.305 \| good	13.936 \| good	0.164 \| good
2025-07-23T17:00:00.000Z	49 \| good	8.627 \| good	38.206 \| good	32.657 \| good	0.302 \| good	24.231 \| good	0.189 \| good
2025-07-23T18:00:00.000Z	49 \| good	9.24 \| good	38.702 \| good	34.597 \| good	0.388 \| good	15.477 \| good	0.189 \| good
2025-07-23T19:00:00.000Z	44 \| good	8.127 \| good	35.207 \| good	34.571 \| good	0.504 \| good	15.488 \| good	0.164 \| good
2025-07-23T20:00:00.000Z	44 \| good	7.675 \| good	33.58 \| good	45.818 \| good	0.509 \| good	12.501 \| good	0.164 \| good
2025-07-23T21:00:00.000Z	45 \| good	6.904 \| good	30.399 \| good	49.108 \| good	0.494 \| good	13.483 \| good	0.208 \| good
2025-07-23T22:00:00.000Z	49 \| good	6.87 \| good	29.787 \| good	53.029 \| good	0.596 \| good	16.016 \| good	0.208 \| good
2025-07-23T22:00:00.000Z	49 \| good	6.87 \| good	29.787 \| good	53.029 \| good	0.596 \| good	16.016 \| good	0.208 \| good
2025-07-21T03:00:00.000Z	44 \| good	8.258 \| good	35.994 \| good	34.064 \| good	3.716 \| good	8.404 \| good	0.163 \| good
2025-07-21T04:00:00.000Z	44 \| good	8.413 \| good	36.948 \| good	30.205 \| good	3.788 \| good	9.592 \| good	0.163 \| good
2025-07-21T05:00:00.000Z	38 \| good	7.331 \| good	32.037 \| good	27.598 \| good	3.86 \| good	10.779 \| good	0.164 \| good
2025-07-21T06:00:00.000Z	33 \| good	6.212 \| good	27.859 \| good	26.489 \| good	3.933 \| good	11.966 \| good	0.165 \| good
2025-07-21T07:00:00.000Z	38 \| good	6.51 \| good	28.94 \| good	26.468 \| good	3.901 \| good	12.647 \| good	0.165 \| good
2025-07-21T08:00:00.000Z	38 \| good	6.56 \| good	28.955 \| good	24.858 \| good	3.869 \| good	13.328 \| good	0.166 \| good
2025-07-21T09:00:00.000Z	22 \| good	4.494 \| good	19.177 \| good	23.646 \| good	3.837 \| good	14.009 \| good	0.166 \| good
2025-07-21T10:00:00.000Z	22 \| good	4.088 \| good	18.01 \| good	22.026 \| good	3.79 \| good	14.491 \| good	0.165 \| good
2025-07-21T11:00:00.000Z	27 \| good	4.83 \| good	20.951 \| good	21.394 \| good	3.742 \| good	14.972 \| good	0.164 \| good
2025-07-21T12:00:00.000Z	22 \| good	3.89 \| good	16.949 \| good	18.449 \| good	3.694 \| good	15.454 \| good	0.163 \| good
2025-07-21T13:00:00.000Z	22 \| good	4.204 \| good	18.064 \| good	18.709 \| good	3.728 \| good	13.782 \| good	0.158 \| good
2025-07-21T14:00:00.000Z	33 \| good	6.326 \| good	27.941 \| good	18.273 \| good	3.762 \| good	12.11 \| good	0.154 \| good
2025-07-21T15:00:00.000Z	44 \| good	8.25 \| good	36.087 \| good	21.369 \| good	3.795 \| good	10.439 \| good	0.15 \| good
2025-07-21T16:00:00.000Z	52 \| moderate	9.5 \| good	42.792 \| good	24.579 \| good	3.472 \| good	8.794 \| good	0.148 \| good
2025-07-21T17:00:00.000Z	54 \| moderate	10.897 \| good	48.192 \| good	30.033 \| good	3.149 \| good	7.149 \| good	0.147 \| good
2025-07-21T18:00:00.000Z	58 \| moderate	13.281 \| fine	59.254 \| fine	39.394 \| good	2.825 \| good	5.505 \| good	0.145 \| good
2025-07-21T19:00:00.000Z	56 \| moderate	12.412 \| fine	55.258 \| fine	48.508 \| good	2.52 \| good	4.355 \| good	0.141 \| good
2025-07-21T20:00:00.000Z	62 \| moderate	14.926 \| fine	67.007 \| fine	57.189 \| fine	2.215 \| good	3.206 \| good	0.137 \| good
2025-07-21T21:00:00.000Z	77 \| moderate	13.688 \| fine	61.03 \| fine	63.239 \| fine	1.909 \| good	2.057 \| good	0.133 \| good
2025-07-21T22:00:00.000Z	80 \| moderate	11.1 \| good	49.016 \| good	63.955 \| fine	2.002 \| good	2.23 \| good	0.132 \| good
2025-07-21T23:00:00.000Z	61 \| moderate	9.653 \| good	42.962 \| good	58.035 \| fine	2.096 \| good	2.404 \| good	0.131 \| good
2025-07-22T00:00:00.000Z	48 \| good	8.149 \| good	35.856 \| good	51.501 \| good	2.189 \| good	2.578 \| good	0.13 \| good
2025-07-22T01:00:00.000Z	44 \| good	7.66 \| good	33.867 \| good	47.325 \| good	2.439 \| good	4.153 \| good	0.133 \| good
2025-07-22T02:00:00.000Z	39 \| good	6.582 \| good	29.757 \| good	41.923 \| good	2.689 \| good	5.728 \| good	0.136 \| good
2025-07-22T03:00:00.000Z	38 \| good	7.467 \| good	32.936 \| good	35.883 \| good	2.94 \| good	7.304 \| good	0.138 \| good
2025-07-22T04:00:00.000Z	38 \| good	7.394 \| good	32.842 \| good	33.058 \| good	3.048 \| good	8.509 \| good	0.14 \| good
2025-07-22T05:00:00.000Z	38 \| good	6.855 \| good	29.954 \| good	32.959 \| good	3.156 \| good	9.714 \| good	0.142 \| good
2025-07-22T06:00:00.000Z	38 \| good	6.835 \| good	29.957 \| good	32.277 \| good	3.264 \| good	10.919 \| good	0.144 \| good
2025-07-22T07:00:00.000Z	38 \| good	7.203 \| good	31.941 \| good	31.242 \| good	3.292 \| good	11.616 \| good	0.146 \| good
2025-07-22T08:00:00.000Z	38 \| good	6.709 \| good	29.853 \| good	30.295 \| good	3.32 \| good	12.313 \| good	0.148 \| good
2025-07-22T09:00:00.000Z	33 \| good	5.775 \| good	25.028 \| good	28.784 \| good	3.347 \| good	13.009 \| good	0.15 \| good
2025-07-22T10:00:00.000Z	27 \| good	5.428 \| good	23.071 \| good	26.845 \| good	3.383 \| good	13.541 \| good	0.15 \| good
2025-07-22T11:00:00.000Z	38 \| good	6.589 \| good	29.811 \| good	24.068 \| good	3.418 \| good	14.072 \| good	0.151 \| good
2025-07-22T12:00:00.000Z	33 \| good	6.012 \| good	26.884 \| good	25.384 \| good	3.453 \| good	14.604 \| good	0.151 \| good
2025-07-22T13:00:00.000Z	27 \| good	5.227 \| good	22.972 \| good	19.09 \| good	3.622 \| good	13.076 \| good	0.15 \| good
2025-07-22T14:00:00.000Z	44 \| good	7.721 \| good	33.973 \| good	23.842 \| good	3.791 \| good	11.548 \| good	0.148 \| good
2025-07-22T15:00:00.000Z	56 \| moderate	12.245 \| fine	54.892 \| good	26.364 \| good	3.96 \| good	10.019 \| good	0.146 \| good
2025-07-22T16:00:00.000Z	60 \| moderate	13.565 \| fine	60.947 \| fine	29.869 \| good	3.714 \| good	8.622 \| good	0.144 \| good
2025-07-22T17:00:00.000Z	58 \| moderate	13.479 \| fine	60.891 \| fine	36.89 \| good	3.467 \| good	7.225 \| good	0.142 \| good
2025-07-22T18:00:00.000Z	58 \| moderate	12.792 \| fine	57.237 \| fine	46.525 \| good	3.221 \| good	5.827 \| good	0.14 \| good
2025-07-22T19:00:00.000Z	54 \| moderate	11.462 \| good	51.147 \| good	54.319 \| good	3.008 \| good	4.702 \| good	0.137 \| good
2025-07-22T20:00:00.000Z	74 \| moderate	11.918 \| good	52.247 \| good	61.589 \| fine	2.795 \| good	3.577 \| good	0.133 \| good
2025-07-22T21:00:00.000Z	93 \| moderate	11.724 \| good	51.895 \| good	67.779 \| fine	2.583 \| good	2.452 \| good	0.13 \| good
2025-07-22T22:00:00.000Z	80 \| moderate	9.562 \| good	42.898 \| good	64.41 \| fine	2.724 \| good	2.554 \| good	0.129 \| good
2025-07-22T23:00:00.000Z	64 \| moderate	8.636 \| good	37.935 \| good	58.708 \| fine	2.865 \| good	2.655 \| good	0.129 \| good
2025-07-23T00:00:00.000Z	126 \| sensitive	19.947 \| fine	21.656 \| good	78.43 \| moderate	3.008 \| good	2.759 \| good	0.128 \| good
2025-07-23T01:00:00.000Z	54 \| moderate	10.731 \| good	47.821 \| good	46.933 \| good	3.23 \| good	4.331 \| good	0.132 \| good
2025-07-23T02:00:00.000Z	54 \| moderate	11.123 \| good	48.918 \| good	46.155 \| good	3.454 \| good	5.905 \| good	0.136 \| 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?