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

Ontario, California currently has a PM10 concentration of 27.975 μg/m3.

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

The current sulfur dioxide (SO2) concentration in Ontario, California is 0.278 ppb.

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

Ontario, California currently has an ozone (O3) concentration of 27.954 ppm.

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

The current level of nitrogen dioxide (NO2) in Ontario, California is 16.511 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)

8.40 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

27.98 μg/m³

155

255

425

605+

Ozone (O₃)

27.95 ppb

201

201+

Sulfur Dioxide (SO₂)

0.28 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

16.51 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.35 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

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
2025-09-05T09:00:00.000Z	44 \| good	8.002 \| good	29.488 \| good	15.425 \| good	0.255 \| good	22.509 \| good	0.267 \| good
2025-09-05T10:00:00.000Z	44 \| good	7.564 \| good	24.897 \| good	12.793 \| good	0.234 \| good	22.551 \| good	0.271 \| good
2025-09-05T11:00:00.000Z	44 \| good	8.149 \| good	29.766 \| good	12.122 \| good	0.245 \| good	21.205 \| good	0.255 \| good
2025-09-05T12:00:00.000Z	44 \| good	7.559 \| good	25.423 \| good	10.351 \| good	0.158 \| good	21.239 \| good	0.263 \| good
2025-09-05T13:00:00.000Z	49 \| good	8.668 \| good	34.333 \| good	8.283 \| good	0.33 \| good	25.238 \| good	0.362 \| good
2025-09-05T14:00:00.000Z	49 \| good	9.315 \| good	33.38 \| good	9.42 \| good	0.33 \| good	25.636 \| good	0.384 \| good
2025-09-05T15:00:00.000Z	56 \| moderate	12.373 \| fine	61.25 \| fine	12.998 \| good	0.413 \| good	23.742 \| good	0.493 \| good
2025-09-05T16:00:00.000Z	62 \| moderate	14.769 \| fine	45.816 \| good	16.22 \| good	0.38 \| good	30.178 \| good	0.46 \| good
2025-09-05T17:00:00.000Z	66 \| moderate	17.272 \| fine	62.107 \| fine	20.568 \| good	0.4 \| good	36.73 \| good	0.465 \| good
2025-09-05T18:00:00.000Z	60 \| moderate	13.93 \| fine	42.595 \| good	32.119 \| good	0.38 \| good	34.077 \| good	0.36 \| good
2025-09-05T19:00:00.000Z	52 \| moderate	9.717 \| good	35.051 \| good	38.906 \| good	0.318 \| good	27.208 \| good	0.293 \| good
2025-09-05T20:00:00.000Z	54 \| moderate	11.169 \| good	52.331 \| good	50.136 \| good	0.242 \| good	26.539 \| good	0.227 \| good
2025-09-05T21:00:00.000Z	50 \| good	8.94 \| good	41.174 \| good	54.116 \| good	0.303 \| good	20.145 \| good	0.263 \| good
2025-09-05T22:00:00.000Z	64 \| moderate	10.906 \| good	42.213 \| good	59.326 \| fine	0.329 \| good	19.969 \| good	0.263 \| good
2025-09-05T23:00:00.000Z	51 \| moderate	9.306 \| good	31.409 \| good	54.839 \| good	0.438 \| good	21.633 \| good	0.252 \| good
2025-09-06T00:00:00.000Z	71 \| moderate	8.779 \| good	34.025 \| good	60.766 \| fine	0.486 \| good	22.808 \| good	0.268 \| good
2025-09-06T01:00:00.000Z	58 \| moderate	10.029 \| good	40.392 \| good	56.808 \| fine	0.569 \| good	25.986 \| good	0.305 \| good
2025-09-06T02:00:00.000Z	52 \| moderate	10.098 \| good	46.033 \| good	43.517 \| good	0.378 \| good	29.042 \| good	0.25 \| good
2025-09-06T03:00:00.000Z	52 \| moderate	10.114 \| good	39.789 \| good	39.27 \| good	0.283 \| good	27.169 \| good	0.259 \| good
2025-09-06T04:00:00.000Z	52 \| moderate	10.413 \| good	35.169 \| good	37.386 \| good	0.363 \| good	27.118 \| good	0.289 \| good
2025-09-06T05:00:00.000Z	58 \| moderate	12.597 \| fine	42.096 \| good	27.443 \| good	0.453 \| good	27.629 \| good	0.335 \| good
2025-09-06T06:00:00.000Z	54 \| moderate	11.181 \| good	30.319 \| good	22.835 \| good	0.257 \| good	21.67 \| good	0.372 \| good
2025-09-06T07:00:00.000Z	54 \| moderate	10.577 \| good	26.661 \| good	21.164 \| good	0.289 \| good	28.587 \| good	0.363 \| good
2025-09-06T08:00:00.000Z	56 \| moderate	12.48 \| fine	48.097 \| good	17.919 \| good	0.262 \| good	27.667 \| good	0.416 \| good
2025-09-06T09:00:00.000Z	54 \| moderate	10.832 \| good	29.098 \| good	15.437 \| good	0.42 \| good	21.303 \| good	0.437 \| good
2025-09-06T10:00:00.000Z	52 \| moderate	10.333 \| good	33.524 \| good	12.598 \| good	0.387 \| good	20.663 \| good	0.4 \| good
2025-09-06T11:00:00.000Z	52 \| moderate	9.617 \| good	28.411 \| good	10.05 \| good	0.316 \| good	22.391 \| good	0.354 \| good
2025-09-06T12:00:00.000Z	44 \| good	8.397 \| good	21.98 \| good	6.962 \| good	0.274 \| good	22.197 \| good	0.363 \| good
2025-09-06T13:00:00.000Z	52 \| moderate	10.254 \| good	37.061 \| good	8.376 \| good	0.321 \| good	21.261 \| good	0.404 \| good
2025-09-06T14:00:00.000Z	54 \| moderate	11.276 \| good	37.714 \| good	7.691 \| good	0.224 \| good	21.572 \| good	0.429 \| good
2025-09-06T15:00:00.000Z	54 \| moderate	10.688 \| good	38.598 \| good	12.644 \| good	0.364 \| good	24.606 \| good	0.467 \| good
2025-09-06T16:00:00.000Z	49 \| good	9.461 \| good	27.548 \| good	17.637 \| good	0.277 \| good	27.532 \| good	0.467 \| good
2025-09-06T17:00:00.000Z	60 \| moderate	14.134 \| fine	40.338 \| good	26.138 \| good	0.39 \| good	27.203 \| good	0.506 \| good
2025-09-06T18:00:00.000Z	64 \| moderate	15.293 \| fine	80.953 \| fine	33.53 \| good	0.505 \| good	28.772 \| good	0.473 \| good
2025-09-06T19:00:00.000Z	62 \| moderate	15.167 \| fine	42.39 \| good	49.716 \| good	0.427 \| good	20.588 \| good	0.347 \| good
2025-09-06T20:00:00.000Z	60 \| moderate	13.518 \| fine	38.083 \| good	54.815 \| good	0.309 \| good	16.703 \| good	0.297 \| good
2025-09-06T21:00:00.000Z	71 \| moderate	10.38 \| good	33.964 \| good	61.011 \| fine	0.242 \| good	13.717 \| good	0.247 \| good
2025-09-06T22:00:00.000Z	84 \| moderate	8.904 \| good	29.143 \| good	64.85 \| fine	0.237 \| good	11.522 \| good	0.285 \| good
2025-09-06T23:00:00.000Z	84 \| moderate	7.999 \| good	35.089 \| good	65.177 \| fine	0.338 \| good	10.41 \| good	0.239 \| good
2025-09-07T00:00:00.000Z	74 \| moderate	7.64 \| good	37.2 \| good	61.663 \| fine	0.395 \| good	11.158 \| good	0.243 \| good
2025-09-07T01:00:00.000Z	54 \| moderate	8.149 \| good	39.881 \| good	55.778 \| fine	0.6 \| good	16.145 \| good	0.264 \| good
2025-09-07T02:00:00.000Z	52 \| moderate	9.792 \| good	38.094 \| good	49.82 \| good	0.4 \| good	16.676 \| good	0.234 \| good
2025-09-07T03:00:00.000Z	38 \| good	6.648 \| good	29.972 \| good	36.294 \| good	3.486 \| good	14.063 \| good	0.181 \| good
2025-09-07T04:00:00.000Z	44 \| good	7.821 \| good	28.806 \| good	44.133 \| good	0.193 \| good	20.9 \| good	0.335 \| good
2025-09-07T05:00:00.000Z	44 \| good	8.163 \| good	24.395 \| good	39.329 \| good	0.395 \| good	19.6 \| good	0.335 \| good
2025-09-07T06:00:00.000Z	49 \| good	9.235 \| good	26.262 \| good	39.444 \| good	0.266 \| good	17.835 \| good	0.38 \| good
2025-09-07T07:00:00.000Z	44 \| good	8.396 \| good	27.975 \| good	27.954 \| good	0.278 \| good	16.511 \| good	0.355 \| good
2025-09-07T08:00:00.000Z	44 \| good	8.396 \| good	27.975 \| good	27.954 \| good	0.278 \| good	16.511 \| good	0.355 \| good
2025-09-03T05:00:00.000Z	33 \| good	6.479 \| good	29.181 \| good	17.732 \| good	3.744 \| good	17.836 \| good	0.199 \| good
2025-09-03T06:00:00.000Z	33 \| good	5.88 \| good	25.492 \| good	13.329 \| good	3.83 \| good	20.394 \| good	0.212 \| good
2025-09-03T07:00:00.000Z	44 \| good	7.605 \| good	33.377 \| good	11.252 \| good	3.862 \| good	21.29 \| good	0.215 \| good
2025-09-03T08:00:00.000Z	49 \| good	8.863 \| good	39.294 \| good	8.55 \| good	3.895 \| good	22.185 \| good	0.218 \| good
2025-09-03T09:00:00.000Z	52 \| moderate	10.307 \| good	45.257 \| good	7.597 \| good	3.928 \| good	23.081 \| good	0.22 \| good
2025-09-03T10:00:00.000Z	49 \| good	9.064 \| good	39.463 \| good	7.159 \| good	3.972 \| good	23.482 \| good	0.218 \| good
2025-09-03T11:00:00.000Z	60 \| moderate	13.699 \| fine	61.08 \| fine	6.946 \| good	4.017 \| good	23.883 \| good	0.215 \| good
2025-09-03T12:00:00.000Z	56 \| moderate	11.952 \| good	54.054 \| good	3.499 \| good	4.061 \| good	24.285 \| good	0.212 \| good
2025-09-03T13:00:00.000Z	58 \| moderate	12.995 \| fine	58.945 \| fine	2.866 \| good	4.01 \| good	22.218 \| good	0.22 \| good
2025-09-03T14:00:00.000Z	62 \| moderate	14.61 \| fine	65.156 \| fine	5.473 \| good	3.959 \| good	20.151 \| good	0.229 \| good
2025-09-03T15:00:00.000Z	62 \| moderate	15.454 \| fine	69.121 \| fine	13.104 \| good	3.908 \| good	18.085 \| good	0.237 \| good
2025-09-03T16:00:00.000Z	62 \| moderate	14.795 \| fine	65.371 \| fine	25.721 \| good	3.706 \| good	14.579 \| good	0.212 \| good
2025-09-03T17:00:00.000Z	60 \| moderate	13.719 \| fine	61.356 \| fine	42.278 \| good	3.504 \| good	11.074 \| good	0.188 \| good
2025-09-03T18:00:00.000Z	61 \| moderate	11.759 \| good	51.595 \| good	57.752 \| fine	3.302 \| good	7.569 \| good	0.164 \| good
2025-09-03T19:00:00.000Z	97 \| moderate	9.015 \| good	39.326 \| good	68.988 \| fine	3.154 \| good	6.317 \| good	0.159 \| good
2025-09-03T20:00:00.000Z	140 \| sensitive	9.886 \| good	44.193 \| good	81.893 \| moderate	3.006 \| good	5.065 \| good	0.155 \| good
2025-09-03T21:00:00.000Z	151 \| unhealthy	10.704 \| good	47.176 \| good	86.377 \| poor	2.858 \| good	3.813 \| good	0.15 \| good
2025-09-03T22:00:00.000Z	140 \| sensitive	10.906 \| good	48.001 \| good	82.153 \| moderate	3.059 \| good	3.949 \| good	0.148 \| good
2025-09-03T23:00:00.000Z	101 \| sensitive	9.491 \| good	42.119 \| good	71.273 \| moderate	3.261 \| good	4.084 \| good	0.147 \| good
2025-09-04T00:00:00.000Z	71 \| moderate	9.676 \| good	42.982 \| good	60.95 \| fine	3.462 \| good	4.219 \| good	0.145 \| good
2025-09-04T01:00:00.000Z	45 \| good	8.069 \| good	35.074 \| good	49.463 \| good	3.894 \| good	6.588 \| good	0.155 \| good
2025-09-04T02:00:00.000Z	38 \| good	7.345 \| good	32.105 \| good	28.396 \| good	4.325 \| good	8.957 \| good	0.164 \| good
2025-09-04T03:00:00.000Z	33 \| good	5.564 \| good	24.299 \| good	24.873 \| good	4.757 \| good	11.326 \| good	0.173 \| good
2025-09-04T04:00:00.000Z	27 \| good	5.33 \| good	23.249 \| good	19.843 \| good	4.846 \| good	13.213 \| good	0.183 \| good
2025-09-04T05:00:00.000Z	27 \| good	5.197 \| good	22.387 \| good	14.786 \| good	4.936 \| good	15.1 \| good	0.192 \| good
2025-09-04T06:00:00.000Z	27 \| good	5.176 \| good	22.294 \| good	10.071 \| good	5.025 \| good	16.988 \| good	0.202 \| good
2025-09-04T07:00:00.000Z	27 \| good	4.864 \| good	21.274 \| good	9.504 \| good	4.95 \| good	17.49 \| good	0.206 \| good
2025-09-04T08:00:00.000Z	27 \| good	5.192 \| good	22.32 \| good	10.615 \| good	4.874 \| good	17.991 \| good	0.211 \| good
2025-09-04T09:00:00.000Z	27 \| good	5.497 \| good	23.394 \| good	8.721 \| good	4.799 \| good	18.493 \| good	0.216 \| good
2025-09-04T10:00:00.000Z	22 \| good	3.737 \| good	16.209 \| good	8.179 \| good	5.012 \| good	19.818 \| good	0.224 \| good
2025-09-04T11:00:00.000Z	33 \| good	6.044 \| good	27.096 \| good	6.748 \| good	5.225 \| good	21.144 \| good	0.231 \| good
2025-09-04T12:00:00.000Z	33 \| good	6.112 \| good	27.093 \| good	5.847 \| good	5.438 \| good	22.469 \| good	0.238 \| good
2025-09-04T13:00:00.000Z	38 \| good	7.006 \| good	31.182 \| good	6.52 \| good	5.511 \| good	22.435 \| good	0.261 \| good
2025-09-04T14:00:00.000Z	52 \| moderate	9.76 \| good	43.203 \| good	7.16 \| good	5.584 \| good	22.401 \| good	0.284 \| good
2025-09-04T15:00:00.000Z	49 \| good	8.989 \| good	39.341 \| good	14.212 \| good	5.658 \| good	22.368 \| good	0.308 \| good
2025-09-04T16:00:00.000Z	44 \| good	8.374 \| good	36.491 \| good	24.129 \| good	5.24 \| good	17.283 \| good	0.263 \| good
2025-09-04T17:00:00.000Z	49 \| good	8.744 \| good	38.476 \| good	36.704 \| good	4.822 \| good	12.199 \| good	0.218 \| good
2025-09-04T18:00:00.000Z	49 \| good	8.019 \| good	35.312 \| good	53.357 \| good	4.404 \| good	7.114 \| good	0.173 \| good
2025-09-04T19:00:00.000Z	97 \| moderate	8.691 \| good	38.252 \| good	68.885 \| fine	3.745 \| good	5.702 \| good	0.161 \| good
2025-09-04T20:00:00.000Z	122 \| sensitive	8.946 \| good	39.205 \| good	77.421 \| moderate	3.086 \| good	4.29 \| good	0.149 \| good
2025-09-04T21:00:00.000Z	108 \| sensitive	7.243 \| good	32.008 \| good	73.476 \| moderate	2.427 \| good	2.878 \| good	0.136 \| good
2025-09-04T22:00:00.000Z	90 \| moderate	6.064 \| good	26.885 \| good	67.244 \| fine	2.487 \| good	3.22 \| good	0.135 \| good
2025-09-04T23:00:00.000Z	74 \| moderate	7.276 \| good	32.001 \| good	62.059 \| fine	2.548 \| good	3.561 \| good	0.134 \| good
2025-09-05T00:00:00.000Z	119 \| sensitive	13.467 \| fine	15.123 \| good	76.084 \| moderate	2.608 \| good	3.904 \| good	0.132 \| good
2025-09-05T01:00:00.000Z	52 \| moderate	10.463 \| good	46.011 \| good	51.509 \| good	3.087 \| good	6.711 \| good	0.147 \| good
2025-09-05T02:00:00.000Z	49 \| good	9.279 \| good	41.081 \| good	37.418 \| good	3.564 \| good	9.52 \| good	0.161 \| good
2025-09-05T03:00:00.000Z	44 \| good	8.487 \| good	37.038 \| good	30.963 \| good	4.041 \| good	12.329 \| good	0.176 \| good
2025-09-05T04:00:00.000Z	38 \| good	7.359 \| good	32.041 \| good	26.372 \| good	3.991 \| good	14.012 \| good	0.186 \| good

Ontario

Empower business decisions with accurate air quality data

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

0.40ppm

How accurate is California, USA air quality data?

The air quality data for California, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.

Source: Ambee Data Sources

Air quality levels in US

Check live rankings of places in the USA affected by air pollution.

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Frequently asked questions

How frequently does the air quality data for Ontario, California get updated?

Air quality updates for Ontario, California are available every hour.

What time in the past 24 hours saw the poorest air quality in Ontario, California?

Ontario, California experienced its worst air quality at 11:00:00, 2025-09-06.

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

The best air quality in Ontario, California was observed at 03:00:00 on 2025-09-07.

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 8.396 μg/m³.

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

Ontario, California currently has a PM₁₀ concentration of 27.975 μg/m³.

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

The current carbon monoxide (CO) level in Ontario, California is 0.355 ppm.

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

The current sulfur dioxide (SO₂) concentration in Ontario, California is 0.278 ppb.

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

Ontario, California currently has an ozone (O₃) concentration of 27.954 ppm.

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

The current level of nitrogen dioxide (NO₂) in Ontario, California is 16.511 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-09-05T09:00:00.000Z	44 \| good	8.002 \| good	29.488 \| good	15.425 \| good	0.255 \| good	22.509 \| good	0.267 \| good
2025-09-05T10:00:00.000Z	44 \| good	7.564 \| good	24.897 \| good	12.793 \| good	0.234 \| good	22.551 \| good	0.271 \| good
2025-09-05T11:00:00.000Z	44 \| good	8.149 \| good	29.766 \| good	12.122 \| good	0.245 \| good	21.205 \| good	0.255 \| good
2025-09-05T12:00:00.000Z	44 \| good	7.559 \| good	25.423 \| good	10.351 \| good	0.158 \| good	21.239 \| good	0.263 \| good
2025-09-05T13:00:00.000Z	49 \| good	8.668 \| good	34.333 \| good	8.283 \| good	0.33 \| good	25.238 \| good	0.362 \| good
2025-09-05T14:00:00.000Z	49 \| good	9.315 \| good	33.38 \| good	9.42 \| good	0.33 \| good	25.636 \| good	0.384 \| good
2025-09-05T15:00:00.000Z	56 \| moderate	12.373 \| fine	61.25 \| fine	12.998 \| good	0.413 \| good	23.742 \| good	0.493 \| good
2025-09-05T16:00:00.000Z	62 \| moderate	14.769 \| fine	45.816 \| good	16.22 \| good	0.38 \| good	30.178 \| good	0.46 \| good
2025-09-05T17:00:00.000Z	66 \| moderate	17.272 \| fine	62.107 \| fine	20.568 \| good	0.4 \| good	36.73 \| good	0.465 \| good
2025-09-05T18:00:00.000Z	60 \| moderate	13.93 \| fine	42.595 \| good	32.119 \| good	0.38 \| good	34.077 \| good	0.36 \| good
2025-09-05T19:00:00.000Z	52 \| moderate	9.717 \| good	35.051 \| good	38.906 \| good	0.318 \| good	27.208 \| good	0.293 \| good
2025-09-05T20:00:00.000Z	54 \| moderate	11.169 \| good	52.331 \| good	50.136 \| good	0.242 \| good	26.539 \| good	0.227 \| good
2025-09-05T21:00:00.000Z	50 \| good	8.94 \| good	41.174 \| good	54.116 \| good	0.303 \| good	20.145 \| good	0.263 \| good
2025-09-05T22:00:00.000Z	64 \| moderate	10.906 \| good	42.213 \| good	59.326 \| fine	0.329 \| good	19.969 \| good	0.263 \| good
2025-09-05T23:00:00.000Z	51 \| moderate	9.306 \| good	31.409 \| good	54.839 \| good	0.438 \| good	21.633 \| good	0.252 \| good
2025-09-06T00:00:00.000Z	71 \| moderate	8.779 \| good	34.025 \| good	60.766 \| fine	0.486 \| good	22.808 \| good	0.268 \| good
2025-09-06T01:00:00.000Z	58 \| moderate	10.029 \| good	40.392 \| good	56.808 \| fine	0.569 \| good	25.986 \| good	0.305 \| good
2025-09-06T02:00:00.000Z	52 \| moderate	10.098 \| good	46.033 \| good	43.517 \| good	0.378 \| good	29.042 \| good	0.25 \| good
2025-09-06T03:00:00.000Z	52 \| moderate	10.114 \| good	39.789 \| good	39.27 \| good	0.283 \| good	27.169 \| good	0.259 \| good
2025-09-06T04:00:00.000Z	52 \| moderate	10.413 \| good	35.169 \| good	37.386 \| good	0.363 \| good	27.118 \| good	0.289 \| good
2025-09-06T05:00:00.000Z	58 \| moderate	12.597 \| fine	42.096 \| good	27.443 \| good	0.453 \| good	27.629 \| good	0.335 \| good
2025-09-06T06:00:00.000Z	54 \| moderate	11.181 \| good	30.319 \| good	22.835 \| good	0.257 \| good	21.67 \| good	0.372 \| good
2025-09-06T07:00:00.000Z	54 \| moderate	10.577 \| good	26.661 \| good	21.164 \| good	0.289 \| good	28.587 \| good	0.363 \| good
2025-09-06T08:00:00.000Z	56 \| moderate	12.48 \| fine	48.097 \| good	17.919 \| good	0.262 \| good	27.667 \| good	0.416 \| good
2025-09-06T09:00:00.000Z	54 \| moderate	10.832 \| good	29.098 \| good	15.437 \| good	0.42 \| good	21.303 \| good	0.437 \| good
2025-09-06T10:00:00.000Z	52 \| moderate	10.333 \| good	33.524 \| good	12.598 \| good	0.387 \| good	20.663 \| good	0.4 \| good
2025-09-06T11:00:00.000Z	52 \| moderate	9.617 \| good	28.411 \| good	10.05 \| good	0.316 \| good	22.391 \| good	0.354 \| good
2025-09-06T12:00:00.000Z	44 \| good	8.397 \| good	21.98 \| good	6.962 \| good	0.274 \| good	22.197 \| good	0.363 \| good
2025-09-06T13:00:00.000Z	52 \| moderate	10.254 \| good	37.061 \| good	8.376 \| good	0.321 \| good	21.261 \| good	0.404 \| good
2025-09-06T14:00:00.000Z	54 \| moderate	11.276 \| good	37.714 \| good	7.691 \| good	0.224 \| good	21.572 \| good	0.429 \| good
2025-09-06T15:00:00.000Z	54 \| moderate	10.688 \| good	38.598 \| good	12.644 \| good	0.364 \| good	24.606 \| good	0.467 \| good
2025-09-06T16:00:00.000Z	49 \| good	9.461 \| good	27.548 \| good	17.637 \| good	0.277 \| good	27.532 \| good	0.467 \| good
2025-09-06T17:00:00.000Z	60 \| moderate	14.134 \| fine	40.338 \| good	26.138 \| good	0.39 \| good	27.203 \| good	0.506 \| good
2025-09-06T18:00:00.000Z	64 \| moderate	15.293 \| fine	80.953 \| fine	33.53 \| good	0.505 \| good	28.772 \| good	0.473 \| good
2025-09-06T19:00:00.000Z	62 \| moderate	15.167 \| fine	42.39 \| good	49.716 \| good	0.427 \| good	20.588 \| good	0.347 \| good
2025-09-06T20:00:00.000Z	60 \| moderate	13.518 \| fine	38.083 \| good	54.815 \| good	0.309 \| good	16.703 \| good	0.297 \| good
2025-09-06T21:00:00.000Z	71 \| moderate	10.38 \| good	33.964 \| good	61.011 \| fine	0.242 \| good	13.717 \| good	0.247 \| good
2025-09-06T22:00:00.000Z	84 \| moderate	8.904 \| good	29.143 \| good	64.85 \| fine	0.237 \| good	11.522 \| good	0.285 \| good
2025-09-06T23:00:00.000Z	84 \| moderate	7.999 \| good	35.089 \| good	65.177 \| fine	0.338 \| good	10.41 \| good	0.239 \| good
2025-09-07T00:00:00.000Z	74 \| moderate	7.64 \| good	37.2 \| good	61.663 \| fine	0.395 \| good	11.158 \| good	0.243 \| good
2025-09-07T01:00:00.000Z	54 \| moderate	8.149 \| good	39.881 \| good	55.778 \| fine	0.6 \| good	16.145 \| good	0.264 \| good
2025-09-07T02:00:00.000Z	52 \| moderate	9.792 \| good	38.094 \| good	49.82 \| good	0.4 \| good	16.676 \| good	0.234 \| good
2025-09-07T03:00:00.000Z	38 \| good	6.648 \| good	29.972 \| good	36.294 \| good	3.486 \| good	14.063 \| good	0.181 \| good
2025-09-07T04:00:00.000Z	44 \| good	7.821 \| good	28.806 \| good	44.133 \| good	0.193 \| good	20.9 \| good	0.335 \| good
2025-09-07T05:00:00.000Z	44 \| good	8.163 \| good	24.395 \| good	39.329 \| good	0.395 \| good	19.6 \| good	0.335 \| good
2025-09-07T06:00:00.000Z	49 \| good	9.235 \| good	26.262 \| good	39.444 \| good	0.266 \| good	17.835 \| good	0.38 \| good
2025-09-07T07:00:00.000Z	44 \| good	8.396 \| good	27.975 \| good	27.954 \| good	0.278 \| good	16.511 \| good	0.355 \| good
2025-09-07T08:00:00.000Z	44 \| good	8.396 \| good	27.975 \| good	27.954 \| good	0.278 \| good	16.511 \| good	0.355 \| good
2025-09-03T05:00:00.000Z	33 \| good	6.479 \| good	29.181 \| good	17.732 \| good	3.744 \| good	17.836 \| good	0.199 \| good
2025-09-03T06:00:00.000Z	33 \| good	5.88 \| good	25.492 \| good	13.329 \| good	3.83 \| good	20.394 \| good	0.212 \| good
2025-09-03T07:00:00.000Z	44 \| good	7.605 \| good	33.377 \| good	11.252 \| good	3.862 \| good	21.29 \| good	0.215 \| good
2025-09-03T08:00:00.000Z	49 \| good	8.863 \| good	39.294 \| good	8.55 \| good	3.895 \| good	22.185 \| good	0.218 \| good
2025-09-03T09:00:00.000Z	52 \| moderate	10.307 \| good	45.257 \| good	7.597 \| good	3.928 \| good	23.081 \| good	0.22 \| good
2025-09-03T10:00:00.000Z	49 \| good	9.064 \| good	39.463 \| good	7.159 \| good	3.972 \| good	23.482 \| good	0.218 \| good
2025-09-03T11:00:00.000Z	60 \| moderate	13.699 \| fine	61.08 \| fine	6.946 \| good	4.017 \| good	23.883 \| good	0.215 \| good
2025-09-03T12:00:00.000Z	56 \| moderate	11.952 \| good	54.054 \| good	3.499 \| good	4.061 \| good	24.285 \| good	0.212 \| good
2025-09-03T13:00:00.000Z	58 \| moderate	12.995 \| fine	58.945 \| fine	2.866 \| good	4.01 \| good	22.218 \| good	0.22 \| good
2025-09-03T14:00:00.000Z	62 \| moderate	14.61 \| fine	65.156 \| fine	5.473 \| good	3.959 \| good	20.151 \| good	0.229 \| good
2025-09-03T15:00:00.000Z	62 \| moderate	15.454 \| fine	69.121 \| fine	13.104 \| good	3.908 \| good	18.085 \| good	0.237 \| good
2025-09-03T16:00:00.000Z	62 \| moderate	14.795 \| fine	65.371 \| fine	25.721 \| good	3.706 \| good	14.579 \| good	0.212 \| good
2025-09-03T17:00:00.000Z	60 \| moderate	13.719 \| fine	61.356 \| fine	42.278 \| good	3.504 \| good	11.074 \| good	0.188 \| good
2025-09-03T18:00:00.000Z	61 \| moderate	11.759 \| good	51.595 \| good	57.752 \| fine	3.302 \| good	7.569 \| good	0.164 \| good
2025-09-03T19:00:00.000Z	97 \| moderate	9.015 \| good	39.326 \| good	68.988 \| fine	3.154 \| good	6.317 \| good	0.159 \| good
2025-09-03T20:00:00.000Z	140 \| sensitive	9.886 \| good	44.193 \| good	81.893 \| moderate	3.006 \| good	5.065 \| good	0.155 \| good
2025-09-03T21:00:00.000Z	151 \| unhealthy	10.704 \| good	47.176 \| good	86.377 \| poor	2.858 \| good	3.813 \| good	0.15 \| good
2025-09-03T22:00:00.000Z	140 \| sensitive	10.906 \| good	48.001 \| good	82.153 \| moderate	3.059 \| good	3.949 \| good	0.148 \| good
2025-09-03T23:00:00.000Z	101 \| sensitive	9.491 \| good	42.119 \| good	71.273 \| moderate	3.261 \| good	4.084 \| good	0.147 \| good
2025-09-04T00:00:00.000Z	71 \| moderate	9.676 \| good	42.982 \| good	60.95 \| fine	3.462 \| good	4.219 \| good	0.145 \| good
2025-09-04T01:00:00.000Z	45 \| good	8.069 \| good	35.074 \| good	49.463 \| good	3.894 \| good	6.588 \| good	0.155 \| good
2025-09-04T02:00:00.000Z	38 \| good	7.345 \| good	32.105 \| good	28.396 \| good	4.325 \| good	8.957 \| good	0.164 \| good
2025-09-04T03:00:00.000Z	33 \| good	5.564 \| good	24.299 \| good	24.873 \| good	4.757 \| good	11.326 \| good	0.173 \| good
2025-09-04T04:00:00.000Z	27 \| good	5.33 \| good	23.249 \| good	19.843 \| good	4.846 \| good	13.213 \| good	0.183 \| good
2025-09-04T05:00:00.000Z	27 \| good	5.197 \| good	22.387 \| good	14.786 \| good	4.936 \| good	15.1 \| good	0.192 \| good
2025-09-04T06:00:00.000Z	27 \| good	5.176 \| good	22.294 \| good	10.071 \| good	5.025 \| good	16.988 \| good	0.202 \| good
2025-09-04T07:00:00.000Z	27 \| good	4.864 \| good	21.274 \| good	9.504 \| good	4.95 \| good	17.49 \| good	0.206 \| good
2025-09-04T08:00:00.000Z	27 \| good	5.192 \| good	22.32 \| good	10.615 \| good	4.874 \| good	17.991 \| good	0.211 \| good
2025-09-04T09:00:00.000Z	27 \| good	5.497 \| good	23.394 \| good	8.721 \| good	4.799 \| good	18.493 \| good	0.216 \| good
2025-09-04T10:00:00.000Z	22 \| good	3.737 \| good	16.209 \| good	8.179 \| good	5.012 \| good	19.818 \| good	0.224 \| good
2025-09-04T11:00:00.000Z	33 \| good	6.044 \| good	27.096 \| good	6.748 \| good	5.225 \| good	21.144 \| good	0.231 \| good
2025-09-04T12:00:00.000Z	33 \| good	6.112 \| good	27.093 \| good	5.847 \| good	5.438 \| good	22.469 \| good	0.238 \| good
2025-09-04T13:00:00.000Z	38 \| good	7.006 \| good	31.182 \| good	6.52 \| good	5.511 \| good	22.435 \| good	0.261 \| good
2025-09-04T14:00:00.000Z	52 \| moderate	9.76 \| good	43.203 \| good	7.16 \| good	5.584 \| good	22.401 \| good	0.284 \| good
2025-09-04T15:00:00.000Z	49 \| good	8.989 \| good	39.341 \| good	14.212 \| good	5.658 \| good	22.368 \| good	0.308 \| good
2025-09-04T16:00:00.000Z	44 \| good	8.374 \| good	36.491 \| good	24.129 \| good	5.24 \| good	17.283 \| good	0.263 \| good
2025-09-04T17:00:00.000Z	49 \| good	8.744 \| good	38.476 \| good	36.704 \| good	4.822 \| good	12.199 \| good	0.218 \| good
2025-09-04T18:00:00.000Z	49 \| good	8.019 \| good	35.312 \| good	53.357 \| good	4.404 \| good	7.114 \| good	0.173 \| good
2025-09-04T19:00:00.000Z	97 \| moderate	8.691 \| good	38.252 \| good	68.885 \| fine	3.745 \| good	5.702 \| good	0.161 \| good
2025-09-04T20:00:00.000Z	122 \| sensitive	8.946 \| good	39.205 \| good	77.421 \| moderate	3.086 \| good	4.29 \| good	0.149 \| good
2025-09-04T21:00:00.000Z	108 \| sensitive	7.243 \| good	32.008 \| good	73.476 \| moderate	2.427 \| good	2.878 \| good	0.136 \| good
2025-09-04T22:00:00.000Z	90 \| moderate	6.064 \| good	26.885 \| good	67.244 \| fine	2.487 \| good	3.22 \| good	0.135 \| good
2025-09-04T23:00:00.000Z	74 \| moderate	7.276 \| good	32.001 \| good	62.059 \| fine	2.548 \| good	3.561 \| good	0.134 \| good
2025-09-05T00:00:00.000Z	119 \| sensitive	13.467 \| fine	15.123 \| good	76.084 \| moderate	2.608 \| good	3.904 \| good	0.132 \| good
2025-09-05T01:00:00.000Z	52 \| moderate	10.463 \| good	46.011 \| good	51.509 \| good	3.087 \| good	6.711 \| good	0.147 \| good
2025-09-05T02:00:00.000Z	49 \| good	9.279 \| good	41.081 \| good	37.418 \| good	3.564 \| good	9.52 \| good	0.161 \| good
2025-09-05T03:00:00.000Z	44 \| good	8.487 \| good	37.038 \| good	30.963 \| good	4.041 \| good	12.329 \| good	0.176 \| good
2025-09-05T04:00:00.000Z	38 \| good	7.359 \| good	32.041 \| good	26.372 \| good	3.991 \| good	14.012 \| good	0.186 \| 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?