What is the current level of PM10 in Four Square Mile, Colorado?

Four Square Mile, Colorado currently has a PM10 concentration of 21.314 μg/m3.

What is the current level of sulfur dioxide (SO2) in Four Square Mile, Colorado?

The current sulfur dioxide (SO2) concentration in Four Square Mile, Colorado is 1.133 ppb.

What is the current level of ozone (O3) in Four Square Mile, Colorado?

Four Square Mile, Colorado currently has an ozone (O3) concentration of 20.241 ppm.

What is the current level of nitrogen dioxide (NO2) in Four Square Mile, Colorado?

The current level of nitrogen dioxide (NO2) in Four Square Mile, Colorado is 26.442 ppb.

Current air quality index in Four Square Mile, Colorado today

Q: What is the PM2.5 concentration in Four Square Mile, Colorado right now?

Four Square Mile, Colorado currently has a PM2.5 concentration of 4.885 μg/m3.

Stay updated with real-time air quality in Four Square Mile, Colorado 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

Four Square Mile, Colorado

Last updated: ... (Local time)

Common air pollutants in Four Square Mile, Colorado

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

4.88 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

21.31 μg/m³

155

255

425

605+

Ozone (O₃)

20.24 ppb

201

201+

Sulfur Dioxide (SO₂)

1.13 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

26.44 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.44 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Moderate

Four Square Mile, Colorado

Get Live Pollen Counts

Four Square Mile, Colorado

Scroll To Air Quality Map

Track live Four Square Mile, Colorado air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T22:00:00.000Z	41 \| good	7.102 \| good	35.383 \| good	43.811 \| good	1.007 \| good	10.313 \| good	0.225 \| good
2026-10-20T23:00:00.000Z	41 \| good	6.018 \| good	21.932 \| good	44.422 \| good	0.878 \| good	10.575 \| good	0.23 \| good
2026-10-21T00:00:00.000Z	41 \| good	4.055 \| good	14.702 \| good	43.936 \| good	0.813 \| good	11.004 \| good	0.192 \| good
2026-10-21T01:00:00.000Z	35 \| good	3.61 \| good	18.109 \| good	37.855 \| good	0.716 \| good	28.696 \| good	0.523 \| good
2026-10-21T02:00:00.000Z	42 \| good	4.382 \| good	21.299 \| good	36.766 \| good	0.955 \| good	43.56 \| good	0.788 \| good
2026-10-21T03:00:00.000Z	44 \| good	7.691 \| good	34.226 \| good	23.461 \| good	0.565 \| good	25.061 \| good	0.228 \| good
2026-10-21T04:00:00.000Z	34 \| good	6.271 \| good	26.146 \| good	30.553 \| good	0.953 \| good	35.745 \| good	0.636 \| good
2026-10-21T05:00:00.000Z	33 \| good	5.883 \| good	23.02 \| good	22.087 \| good	0.793 \| good	35.129 \| good	0.476 \| good
2026-10-21T06:00:00.000Z	33 \| good	6.103 \| good	23.402 \| good	20.066 \| good	1.019 \| good	31.059 \| good	0.517 \| good
2026-10-21T07:00:00.000Z	33 \| good	6.111 \| good	22.624 \| good	25.498 \| good	1.162 \| good	28.162 \| good	0.353 \| good
2026-10-21T08:00:00.000Z	33 \| good	5.887 \| good	24.178 \| good	23.979 \| good	0.928 \| good	24.973 \| good	0.316 \| good
2026-10-21T09:00:00.000Z	33 \| good	6.05 \| good	17.866 \| good	17.916 \| good	0.869 \| good	21.844 \| good	0.276 \| good
2026-10-21T10:00:00.000Z	33 \| good	6.071 \| good	22.606 \| good	15.861 \| good	0.812 \| good	21.602 \| good	0.309 \| good
2026-10-21T11:00:00.000Z	33 \| good	6.258 \| good	22.077 \| good	13.679 \| good	0.782 \| good	23.829 \| good	0.439 \| good
2026-10-21T12:00:00.000Z	38 \| good	7.048 \| good	21.887 \| good	10.53 \| good	0.784 \| good	25.037 \| good	0.521 \| good
2026-10-21T13:00:00.000Z	44 \| good	8.4 \| good	34.78 \| good	13.036 \| good	1.078 \| good	28.225 \| good	0.604 \| good
2026-10-21T14:00:00.000Z	38 \| good	7.334 \| good	32.478 \| good	17.745 \| good	1.572 \| good	30.722 \| good	0.511 \| good
2026-10-21T15:00:00.000Z	58 \| moderate	9.415 \| good	69.962 \| fine	25.811 \| good	1.594 \| good	30.013 \| good	0.556 \| good
2026-10-21T16:00:00.000Z	49 \| good	9.003 \| good	44.593 \| good	27.564 \| good	1.544 \| good	27.498 \| good	0.432 \| good
2026-10-21T17:00:00.000Z	44 \| good	7.806 \| good	35 \| good	36.355 \| good	1.161 \| good	21.683 \| good	0.334 \| good
2026-10-21T18:00:00.000Z	33 \| good	6.304 \| good	32.047 \| good	32.68 \| good	1.257 \| good	15.174 \| good	0.334 \| good
2026-10-21T19:00:00.000Z	42 \| good	5.869 \| good	22.914 \| good	44.524 \| good	0.755 \| good	7.501 \| good	0.187 \| good
2026-10-21T20:00:00.000Z	44 \| good	4.876 \| good	21.742 \| good	48.207 \| good	0.66 \| good	7.795 \| good	0.179 \| good
2026-10-21T21:00:00.000Z	46 \| good	4.215 \| good	21.911 \| good	49.632 \| good	0.484 \| good	6.845 \| good	0.141 \| good
2026-10-21T22:00:00.000Z	42 \| good	2.664 \| good	15.749 \| good	44.875 \| good	0.456 \| good	7.451 \| good	0.19 \| good
2026-10-21T23:00:00.000Z	44 \| good	3.5 \| good	19.111 \| good	48.395 \| good	0.374 \| good	9.126 \| good	0.195 \| good
2026-10-22T00:00:00.000Z	44 \| good	3.423 \| good	16.008 \| good	47.501 \| good	0.825 \| good	11.699 \| good	0.255 \| good
2026-10-22T01:00:00.000Z	40 \| good	3.16 \| good	20.155 \| good	43.239 \| good	0.624 \| good	16.963 \| good	0.384 \| good
2026-10-22T02:00:00.000Z	35 \| good	2.045 \| good	10.417 \| good	37.98 \| good	0.306 \| good	13.837 \| good	0.331 \| good
2026-10-22T03:00:00.000Z	34 \| good	2.848 \| good	12.43 \| good	37.08 \| good	0.394 \| good	20.317 \| good	0.218 \| good
2026-10-22T04:00:00.000Z	32 \| good	2.485 \| good	11.009 \| good	35.402 \| good	0.906 \| good	8.176 \| good	0.294 \| good
2026-10-22T05:00:00.000Z	31 \| good	2.295 \| good	11.737 \| good	33.426 \| good	0.795 \| good	6.963 \| good	0.264 \| good
2026-10-22T06:00:00.000Z	30 \| good	1.962 \| good	8.291 \| good	32.074 \| good	0.56 \| good	6.259 \| good	0.192 \| good
2026-10-22T07:00:00.000Z	32 \| good	1.863 \| good	10.99 \| good	35.134 \| good	0.694 \| good	8.343 \| good	0.144 \| good
2026-10-22T08:00:00.000Z	31 \| good	1.541 \| good	6.347 \| good	33.247 \| good	0.609 \| good	7.696 \| good	0.146 \| good
2026-10-22T09:00:00.000Z	29 \| good	1.227 \| good	5.038 \| good	31.109 \| good	0.956 \| good	7.722 \| good	0.112 \| good
2026-10-22T10:00:00.000Z	25 \| good	0.897 \| good	3.594 \| good	27.487 \| good	0.594 \| good	13.776 \| good	0.173 \| good
2026-10-22T11:00:00.000Z	24 \| good	1.679 \| good	7.116 \| good	25.54 \| good	0.386 \| good	10.187 \| good	0.222 \| good
2026-10-22T12:00:00.000Z	22 \| good	3.395 \| good	16.239 \| good	23.971 \| good	0.549 \| good	15.152 \| good	0.222 \| good
2026-10-22T13:00:00.000Z	22 \| good	4.14 \| good	16.385 \| good	21.087 \| good	0.559 \| good	15.385 \| good	0.482 \| good
2026-10-22T14:00:00.000Z	27 \| good	4.691 \| good	20.485 \| good	21.277 \| good	0.674 \| good	23.549 \| good	0.428 \| good
2026-10-22T15:00:00.000Z	33 \| good	5.51 \| good	20.472 \| good	19.427 \| good	0.906 \| good	25.289 \| good	0.68 \| good
2026-10-22T16:00:00.000Z	29 \| good	3.377 \| good	13.103 \| good	22.869 \| good	1.154 \| good	31.13 \| good	0.549 \| good
2026-10-22T17:00:00.000Z	33 \| good	6.265 \| good	20.618 \| good	25.235 \| good	1.326 \| good	32.257 \| good	0.473 \| good
2026-10-22T18:00:00.000Z	38 \| good	7.142 \| good	31.09 \| good	24.951 \| good	1.164 \| good	25.513 \| good	0.356 \| good
2026-10-22T19:00:00.000Z	33 \| good	5.996 \| good	26.334 \| good	26.016 \| good	0.895 \| good	20.345 \| good	0.348 \| good
2026-10-22T20:00:00.000Z	33 \| good	5.732 \| good	21.912 \| good	23.906 \| good	1.046 \| good	25.259 \| good	0.378 \| good
2026-10-22T21:00:00.000Z	27 \| good	4.885 \| good	21.314 \| good	20.241 \| good	1.133 \| good	26.442 \| good	0.439 \| good
2026-10-22T22:00:00.000Z	33 \| good	2.645 \| good	10.821 \| good	35.536 \| good	0.346 \| good	1.803 \| good	0.098 \| good
2026-10-22T23:00:00.000Z	29 \| good	3.139 \| good	13.437 \| good	31.224 \| good	0.337 \| good	2.008 \| good	0.101 \| good
2026-10-23T00:00:00.000Z	28 \| good	1.471 \| good	5.887 \| good	29.961 \| good	0.357 \| good	6.726 \| good	0.13 \| good
2026-10-23T01:00:00.000Z	26 \| good	0.582 \| good	2.415 \| good	27.905 \| good	0.426 \| good	13.865 \| good	0.181 \| good
2026-10-23T02:00:00.000Z	31 \| good	0.483 \| good	1.604 \| good	33.369 \| good	0.441 \| good	13.9 \| good	0.196 \| good
2026-10-23T03:00:00.000Z	37 \| good	0.2 \| good	0.512 \| good	40.331 \| good	0.394 \| good	13.414 \| good	0.183 \| good
2026-10-23T04:00:00.000Z	39 \| good	0.455 \| good	1.951 \| good	41.872 \| good	0.36 \| good	12.778 \| good	0.171 \| good
2026-10-23T05:00:00.000Z	35 \| good	0.482 \| good	1.951 \| good	38.41 \| good	0.331 \| good	11.788 \| good	0.161 \| good
2026-10-23T06:00:00.000Z	36 \| good	0.154 \| good	0.247 \| good	38.954 \| good	0.298 \| good	10.176 \| good	0.15 \| good
2026-10-23T07:00:00.000Z	33 \| good	0.264 \| good	0.993 \| good	36.37 \| good	0.269 \| good	7.656 \| good	0.137 \| good
2026-10-23T08:00:00.000Z	31 \| good	0.57 \| good	2.025 \| good	33.237 \| good	0.256 \| good	5.167 \| good	0.124 \| good
2026-10-23T09:00:00.000Z	30 \| good	0.812 \| good	3.245 \| good	31.551 \| good	0.245 \| good	3.239 \| good	0.114 \| good
2026-10-23T10:00:00.000Z	32 \| good	1.178 \| good	4.965 \| good	34.542 \| good	0.234 \| good	2.295 \| good	0.11 \| good
2026-10-23T11:00:00.000Z	31 \| good	0.943 \| good	3.677 \| good	34.319 \| good	0.223 \| good	1.973 \| good	0.109 \| good
2026-10-23T12:00:00.000Z	32 \| good	1.651 \| good	6.667 \| good	34.754 \| good	0.213 \| good	1.978 \| good	0.11 \| good
2026-10-23T13:00:00.000Z	30 \| good	2.23 \| good	9.24 \| good	32.224 \| good	0.211 \| good	2.667 \| good	0.115 \| good
2026-10-23T14:00:00.000Z	28 \| good	2.672 \| good	10.822 \| good	30.473 \| good	0.217 \| good	3.767 \| good	0.123 \| good
2026-10-23T15:00:00.000Z	31 \| good	1.555 \| good	6.381 \| good	33.984 \| good	0.214 \| good	3.391 \| good	0.126 \| good
2026-10-23T16:00:00.000Z	36 \| good	0.649 \| good	2.343 \| good	39.045 \| good	0.202 \| good	2.253 \| good	0.12 \| good
2026-10-23T17:00:00.000Z	39 \| good	0.419 \| good	1.799 \| good	42.364 \| good	0.178 \| good	1.151 \| good	0.11 \| good
2026-10-23T18:00:00.000Z	44 \| good	0.161 \| good	0.181 \| good	46.649 \| good	0.157 \| good	0.729 \| good	0.105 \| good
2026-10-23T19:00:00.000Z	44 \| good	0.842 \| good	3 \| good	48.348 \| good	0.143 \| good	0.598 \| good	0.102 \| good
2026-10-23T20:00:00.000Z	45 \| good	1.526 \| good	6.465 \| good	49.424 \| good	0.132 \| good	0.559 \| good	0.1 \| good
2026-10-23T21:00:00.000Z	46 \| good	1.844 \| good	7.607 \| good	49.545 \| good	0.123 \| good	0.572 \| good	0.099 \| good
2026-10-23T22:00:00.000Z	46 \| good	1.581 \| good	6.667 \| good	49.737 \| good	0.118 \| good	0.659 \| good	0.098 \| good
2026-10-23T23:00:00.000Z	44 \| good	1.176 \| good	4.775 \| good	48.326 \| good	0.119 \| good	0.914 \| good	0.098 \| good
2026-10-24T00:00:00.000Z	38 \| good	0.753 \| good	2.914 \| good	41.022 \| good	0.146 \| good	4.038 \| good	0.116 \| good
2026-10-24T01:00:00.000Z	31 \| good	0.506 \| good	2.025 \| good	34.172 \| good	0.209 \| good	10.612 \| good	0.147 \| good
2026-10-24T02:00:00.000Z	33 \| good	0.782 \| good	2.856 \| good	36.415 \| good	0.244 \| good	13.761 \| good	0.164 \| good
2026-10-24T03:00:00.000Z	29 \| good	1.089 \| good	4.237 \| good	31.124 \| good	0.254 \| good	14.164 \| good	0.169 \| good
2026-10-24T04:00:00.000Z	27 \| good	1.236 \| good	4.944 \| good	29.098 \| good	0.257 \| good	14.059 \| good	0.171 \| good
2026-10-24T05:00:00.000Z	23 \| good	2.598 \| good	10.667 \| good	24.704 \| good	0.257 \| good	14.41 \| good	0.175 \| good
2026-10-24T06:00:00.000Z	38 \| good	7.176 \| good	31.868 \| good	27.197 \| good	0.245 \| good	14.12 \| good	0.179 \| good
2026-10-24T07:00:00.000Z	56 \| moderate	12.235 \| fine	54.274 \| good	26.248 \| good	0.23 \| good	13.359 \| good	0.18 \| good
2026-10-24T08:00:00.000Z	62 \| moderate	15.232 \| fine	67.792 \| fine	27.131 \| good	0.219 \| good	13.618 \| good	0.171 \| good
2026-10-24T09:00:00.000Z	64 \| moderate	15.554 \| fine	69.362 \| fine	27.678 \| good	0.216 \| good	14.796 \| good	0.166 \| good
2026-10-24T10:00:00.000Z	64 \| moderate	15.935 \| fine	71.004 \| fine	26.422 \| good	0.22 \| good	14.185 \| good	0.163 \| good
2026-10-24T11:00:00.000Z	71 \| moderate	19.621 \| fine	85.93 \| fine	28.059 \| good	0.224 \| good	11.634 \| good	0.153 \| good
2026-10-24T12:00:00.000Z	75 \| moderate	21.793 \| fine	95.525 \| fine	29.852 \| good	0.227 \| good	9.419 \| good	0.144 \| good
2026-10-24T13:00:00.000Z	75 \| moderate	21.781 \| fine	95.192 \| fine	28.091 \| good	0.239 \| good	9.052 \| good	0.143 \| good
2026-10-24T14:00:00.000Z	69 \| moderate	19.351 \| fine	85.645 \| fine	31.84 \| good	0.268 \| good	9.061 \| good	0.149 \| good
2026-10-24T15:00:00.000Z	52 \| moderate	9.697 \| good	43.323 \| good	37.978 \| good	0.284 \| good	3.662 \| good	0.13 \| good
2026-10-24T16:00:00.000Z	34 \| good	5.727 \| good	25.045 \| good	37.108 \| good	0.367 \| good	2.644 \| good	0.132 \| good
2026-10-24T17:00:00.000Z	31 \| good	5.264 \| good	23.121 \| good	33.03 \| good	0.455 \| good	2.307 \| good	0.136 \| good
2026-10-24T18:00:00.000Z	33 \| good	4.368 \| good	19.036 \| good	35.708 \| good	0.522 \| good	2.005 \| good	0.138 \| good
2026-10-24T19:00:00.000Z	37 \| good	4.329 \| good	18.857 \| good	39.883 \| good	0.571 \| good	1.94 \| good	0.14 \| good
2026-10-24T20:00:00.000Z	37 \| good	5.199 \| good	22.354 \| good	40.11 \| good	0.589 \| good	1.93 \| good	0.141 \| good
2026-10-24T21:00:00.000Z	39 \| good	5.822 \| good	25.892 \| good	42.264 \| good	0.579 \| good	1.958 \| good	0.141 \| good

Four Square Mile

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Four Square Mile, Colorado

0.48ppm

How accurate is Colorado, USA air quality data?

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

Source: Ambee Data Sources

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Frequently asked questions

How frequently does the air quality data for Four Square Mile, Colorado get updated?

Air quality updates for Four Square Mile, Colorado are available every hour.

What time in the past 24 hours saw the poorest air quality in Four Square Mile, Colorado?

Four Square Mile, Colorado experienced its worst air quality at 11:00:00, 2026-10-21.

When was air quality in Four Square Mile, Colorado the best over the past 24 hours?

The best air quality in Four Square Mile, Colorado was observed at 08:00:00 on 2026-10-22.

What is the air quality in Four Square Mile, Colorado right now?

The air quality in Four Square Mile, Colorado right now is Good, with an AQI of 27.

What pollutant is most frequently found in Four Square Mile, Colorado?

In Four Square Mile, Colorado, PM2.5 is the most frequently found pollutant.

What can I do if the air quality in Four Square Mile, Colorado is poor?

When air quality in Four Square Mile, Colorado is compromised, staying indoors and wearing a mask can reduce health risks.

What is the PM_2.5 concentration in Four Square Mile, Colorado right now?

Four Square Mile, Colorado currently has a PM_2.5 concentration of 4.885 μg/m³.

What is the current level of PM₁₀ in Four Square Mile, Colorado?

Four Square Mile, Colorado currently has a PM₁₀ concentration of 21.314 μg/m³.

What is the current level of carbon monoxide (CO) in Four Square Mile, Colorado?

The current carbon monoxide (CO) level in Four Square Mile, Colorado is 0.439 ppm.

What is the current level of sulfur dioxide (SO₂) in Four Square Mile, Colorado?

The current sulfur dioxide (SO₂) concentration in Four Square Mile, Colorado is 1.133 ppb.

What is the current level of ozone (O₃) in Four Square Mile, Colorado?

Four Square Mile, Colorado currently has an ozone (O₃) concentration of 20.241 ppm.

What is the current level of nitrogen dioxide (NO₂) in Four Square Mile, Colorado?

The current level of nitrogen dioxide (NO₂) in Four Square Mile, Colorado is 26.442 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-10-20T22:00:00.000Z	41 \| good	7.102 \| good	35.383 \| good	43.811 \| good	1.007 \| good	10.313 \| good	0.225 \| good
2026-10-20T23:00:00.000Z	41 \| good	6.018 \| good	21.932 \| good	44.422 \| good	0.878 \| good	10.575 \| good	0.23 \| good
2026-10-21T00:00:00.000Z	41 \| good	4.055 \| good	14.702 \| good	43.936 \| good	0.813 \| good	11.004 \| good	0.192 \| good
2026-10-21T01:00:00.000Z	35 \| good	3.61 \| good	18.109 \| good	37.855 \| good	0.716 \| good	28.696 \| good	0.523 \| good
2026-10-21T02:00:00.000Z	42 \| good	4.382 \| good	21.299 \| good	36.766 \| good	0.955 \| good	43.56 \| good	0.788 \| good
2026-10-21T03:00:00.000Z	44 \| good	7.691 \| good	34.226 \| good	23.461 \| good	0.565 \| good	25.061 \| good	0.228 \| good
2026-10-21T04:00:00.000Z	34 \| good	6.271 \| good	26.146 \| good	30.553 \| good	0.953 \| good	35.745 \| good	0.636 \| good
2026-10-21T05:00:00.000Z	33 \| good	5.883 \| good	23.02 \| good	22.087 \| good	0.793 \| good	35.129 \| good	0.476 \| good
2026-10-21T06:00:00.000Z	33 \| good	6.103 \| good	23.402 \| good	20.066 \| good	1.019 \| good	31.059 \| good	0.517 \| good
2026-10-21T07:00:00.000Z	33 \| good	6.111 \| good	22.624 \| good	25.498 \| good	1.162 \| good	28.162 \| good	0.353 \| good
2026-10-21T08:00:00.000Z	33 \| good	5.887 \| good	24.178 \| good	23.979 \| good	0.928 \| good	24.973 \| good	0.316 \| good
2026-10-21T09:00:00.000Z	33 \| good	6.05 \| good	17.866 \| good	17.916 \| good	0.869 \| good	21.844 \| good	0.276 \| good
2026-10-21T10:00:00.000Z	33 \| good	6.071 \| good	22.606 \| good	15.861 \| good	0.812 \| good	21.602 \| good	0.309 \| good
2026-10-21T11:00:00.000Z	33 \| good	6.258 \| good	22.077 \| good	13.679 \| good	0.782 \| good	23.829 \| good	0.439 \| good
2026-10-21T12:00:00.000Z	38 \| good	7.048 \| good	21.887 \| good	10.53 \| good	0.784 \| good	25.037 \| good	0.521 \| good
2026-10-21T13:00:00.000Z	44 \| good	8.4 \| good	34.78 \| good	13.036 \| good	1.078 \| good	28.225 \| good	0.604 \| good
2026-10-21T14:00:00.000Z	38 \| good	7.334 \| good	32.478 \| good	17.745 \| good	1.572 \| good	30.722 \| good	0.511 \| good
2026-10-21T15:00:00.000Z	58 \| moderate	9.415 \| good	69.962 \| fine	25.811 \| good	1.594 \| good	30.013 \| good	0.556 \| good
2026-10-21T16:00:00.000Z	49 \| good	9.003 \| good	44.593 \| good	27.564 \| good	1.544 \| good	27.498 \| good	0.432 \| good
2026-10-21T17:00:00.000Z	44 \| good	7.806 \| good	35 \| good	36.355 \| good	1.161 \| good	21.683 \| good	0.334 \| good
2026-10-21T18:00:00.000Z	33 \| good	6.304 \| good	32.047 \| good	32.68 \| good	1.257 \| good	15.174 \| good	0.334 \| good
2026-10-21T19:00:00.000Z	42 \| good	5.869 \| good	22.914 \| good	44.524 \| good	0.755 \| good	7.501 \| good	0.187 \| good
2026-10-21T20:00:00.000Z	44 \| good	4.876 \| good	21.742 \| good	48.207 \| good	0.66 \| good	7.795 \| good	0.179 \| good
2026-10-21T21:00:00.000Z	46 \| good	4.215 \| good	21.911 \| good	49.632 \| good	0.484 \| good	6.845 \| good	0.141 \| good
2026-10-21T22:00:00.000Z	42 \| good	2.664 \| good	15.749 \| good	44.875 \| good	0.456 \| good	7.451 \| good	0.19 \| good
2026-10-21T23:00:00.000Z	44 \| good	3.5 \| good	19.111 \| good	48.395 \| good	0.374 \| good	9.126 \| good	0.195 \| good
2026-10-22T00:00:00.000Z	44 \| good	3.423 \| good	16.008 \| good	47.501 \| good	0.825 \| good	11.699 \| good	0.255 \| good
2026-10-22T01:00:00.000Z	40 \| good	3.16 \| good	20.155 \| good	43.239 \| good	0.624 \| good	16.963 \| good	0.384 \| good
2026-10-22T02:00:00.000Z	35 \| good	2.045 \| good	10.417 \| good	37.98 \| good	0.306 \| good	13.837 \| good	0.331 \| good
2026-10-22T03:00:00.000Z	34 \| good	2.848 \| good	12.43 \| good	37.08 \| good	0.394 \| good	20.317 \| good	0.218 \| good
2026-10-22T04:00:00.000Z	32 \| good	2.485 \| good	11.009 \| good	35.402 \| good	0.906 \| good	8.176 \| good	0.294 \| good
2026-10-22T05:00:00.000Z	31 \| good	2.295 \| good	11.737 \| good	33.426 \| good	0.795 \| good	6.963 \| good	0.264 \| good
2026-10-22T06:00:00.000Z	30 \| good	1.962 \| good	8.291 \| good	32.074 \| good	0.56 \| good	6.259 \| good	0.192 \| good
2026-10-22T07:00:00.000Z	32 \| good	1.863 \| good	10.99 \| good	35.134 \| good	0.694 \| good	8.343 \| good	0.144 \| good
2026-10-22T08:00:00.000Z	31 \| good	1.541 \| good	6.347 \| good	33.247 \| good	0.609 \| good	7.696 \| good	0.146 \| good
2026-10-22T09:00:00.000Z	29 \| good	1.227 \| good	5.038 \| good	31.109 \| good	0.956 \| good	7.722 \| good	0.112 \| good
2026-10-22T10:00:00.000Z	25 \| good	0.897 \| good	3.594 \| good	27.487 \| good	0.594 \| good	13.776 \| good	0.173 \| good
2026-10-22T11:00:00.000Z	24 \| good	1.679 \| good	7.116 \| good	25.54 \| good	0.386 \| good	10.187 \| good	0.222 \| good
2026-10-22T12:00:00.000Z	22 \| good	3.395 \| good	16.239 \| good	23.971 \| good	0.549 \| good	15.152 \| good	0.222 \| good
2026-10-22T13:00:00.000Z	22 \| good	4.14 \| good	16.385 \| good	21.087 \| good	0.559 \| good	15.385 \| good	0.482 \| good
2026-10-22T14:00:00.000Z	27 \| good	4.691 \| good	20.485 \| good	21.277 \| good	0.674 \| good	23.549 \| good	0.428 \| good
2026-10-22T15:00:00.000Z	33 \| good	5.51 \| good	20.472 \| good	19.427 \| good	0.906 \| good	25.289 \| good	0.68 \| good
2026-10-22T16:00:00.000Z	29 \| good	3.377 \| good	13.103 \| good	22.869 \| good	1.154 \| good	31.13 \| good	0.549 \| good
2026-10-22T17:00:00.000Z	33 \| good	6.265 \| good	20.618 \| good	25.235 \| good	1.326 \| good	32.257 \| good	0.473 \| good
2026-10-22T18:00:00.000Z	38 \| good	7.142 \| good	31.09 \| good	24.951 \| good	1.164 \| good	25.513 \| good	0.356 \| good
2026-10-22T19:00:00.000Z	33 \| good	5.996 \| good	26.334 \| good	26.016 \| good	0.895 \| good	20.345 \| good	0.348 \| good
2026-10-22T20:00:00.000Z	33 \| good	5.732 \| good	21.912 \| good	23.906 \| good	1.046 \| good	25.259 \| good	0.378 \| good
2026-10-22T21:00:00.000Z	27 \| good	4.885 \| good	21.314 \| good	20.241 \| good	1.133 \| good	26.442 \| good	0.439 \| good
2026-10-22T22:00:00.000Z	33 \| good	2.645 \| good	10.821 \| good	35.536 \| good	0.346 \| good	1.803 \| good	0.098 \| good
2026-10-22T23:00:00.000Z	29 \| good	3.139 \| good	13.437 \| good	31.224 \| good	0.337 \| good	2.008 \| good	0.101 \| good
2026-10-23T00:00:00.000Z	28 \| good	1.471 \| good	5.887 \| good	29.961 \| good	0.357 \| good	6.726 \| good	0.13 \| good
2026-10-23T01:00:00.000Z	26 \| good	0.582 \| good	2.415 \| good	27.905 \| good	0.426 \| good	13.865 \| good	0.181 \| good
2026-10-23T02:00:00.000Z	31 \| good	0.483 \| good	1.604 \| good	33.369 \| good	0.441 \| good	13.9 \| good	0.196 \| good
2026-10-23T03:00:00.000Z	37 \| good	0.2 \| good	0.512 \| good	40.331 \| good	0.394 \| good	13.414 \| good	0.183 \| good
2026-10-23T04:00:00.000Z	39 \| good	0.455 \| good	1.951 \| good	41.872 \| good	0.36 \| good	12.778 \| good	0.171 \| good
2026-10-23T05:00:00.000Z	35 \| good	0.482 \| good	1.951 \| good	38.41 \| good	0.331 \| good	11.788 \| good	0.161 \| good
2026-10-23T06:00:00.000Z	36 \| good	0.154 \| good	0.247 \| good	38.954 \| good	0.298 \| good	10.176 \| good	0.15 \| good
2026-10-23T07:00:00.000Z	33 \| good	0.264 \| good	0.993 \| good	36.37 \| good	0.269 \| good	7.656 \| good	0.137 \| good
2026-10-23T08:00:00.000Z	31 \| good	0.57 \| good	2.025 \| good	33.237 \| good	0.256 \| good	5.167 \| good	0.124 \| good
2026-10-23T09:00:00.000Z	30 \| good	0.812 \| good	3.245 \| good	31.551 \| good	0.245 \| good	3.239 \| good	0.114 \| good
2026-10-23T10:00:00.000Z	32 \| good	1.178 \| good	4.965 \| good	34.542 \| good	0.234 \| good	2.295 \| good	0.11 \| good
2026-10-23T11:00:00.000Z	31 \| good	0.943 \| good	3.677 \| good	34.319 \| good	0.223 \| good	1.973 \| good	0.109 \| good
2026-10-23T12:00:00.000Z	32 \| good	1.651 \| good	6.667 \| good	34.754 \| good	0.213 \| good	1.978 \| good	0.11 \| good
2026-10-23T13:00:00.000Z	30 \| good	2.23 \| good	9.24 \| good	32.224 \| good	0.211 \| good	2.667 \| good	0.115 \| good
2026-10-23T14:00:00.000Z	28 \| good	2.672 \| good	10.822 \| good	30.473 \| good	0.217 \| good	3.767 \| good	0.123 \| good
2026-10-23T15:00:00.000Z	31 \| good	1.555 \| good	6.381 \| good	33.984 \| good	0.214 \| good	3.391 \| good	0.126 \| good
2026-10-23T16:00:00.000Z	36 \| good	0.649 \| good	2.343 \| good	39.045 \| good	0.202 \| good	2.253 \| good	0.12 \| good
2026-10-23T17:00:00.000Z	39 \| good	0.419 \| good	1.799 \| good	42.364 \| good	0.178 \| good	1.151 \| good	0.11 \| good
2026-10-23T18:00:00.000Z	44 \| good	0.161 \| good	0.181 \| good	46.649 \| good	0.157 \| good	0.729 \| good	0.105 \| good
2026-10-23T19:00:00.000Z	44 \| good	0.842 \| good	3 \| good	48.348 \| good	0.143 \| good	0.598 \| good	0.102 \| good
2026-10-23T20:00:00.000Z	45 \| good	1.526 \| good	6.465 \| good	49.424 \| good	0.132 \| good	0.559 \| good	0.1 \| good
2026-10-23T21:00:00.000Z	46 \| good	1.844 \| good	7.607 \| good	49.545 \| good	0.123 \| good	0.572 \| good	0.099 \| good
2026-10-23T22:00:00.000Z	46 \| good	1.581 \| good	6.667 \| good	49.737 \| good	0.118 \| good	0.659 \| good	0.098 \| good
2026-10-23T23:00:00.000Z	44 \| good	1.176 \| good	4.775 \| good	48.326 \| good	0.119 \| good	0.914 \| good	0.098 \| good
2026-10-24T00:00:00.000Z	38 \| good	0.753 \| good	2.914 \| good	41.022 \| good	0.146 \| good	4.038 \| good	0.116 \| good
2026-10-24T01:00:00.000Z	31 \| good	0.506 \| good	2.025 \| good	34.172 \| good	0.209 \| good	10.612 \| good	0.147 \| good
2026-10-24T02:00:00.000Z	33 \| good	0.782 \| good	2.856 \| good	36.415 \| good	0.244 \| good	13.761 \| good	0.164 \| good
2026-10-24T03:00:00.000Z	29 \| good	1.089 \| good	4.237 \| good	31.124 \| good	0.254 \| good	14.164 \| good	0.169 \| good
2026-10-24T04:00:00.000Z	27 \| good	1.236 \| good	4.944 \| good	29.098 \| good	0.257 \| good	14.059 \| good	0.171 \| good
2026-10-24T05:00:00.000Z	23 \| good	2.598 \| good	10.667 \| good	24.704 \| good	0.257 \| good	14.41 \| good	0.175 \| good
2026-10-24T06:00:00.000Z	38 \| good	7.176 \| good	31.868 \| good	27.197 \| good	0.245 \| good	14.12 \| good	0.179 \| good
2026-10-24T07:00:00.000Z	56 \| moderate	12.235 \| fine	54.274 \| good	26.248 \| good	0.23 \| good	13.359 \| good	0.18 \| good
2026-10-24T08:00:00.000Z	62 \| moderate	15.232 \| fine	67.792 \| fine	27.131 \| good	0.219 \| good	13.618 \| good	0.171 \| good
2026-10-24T09:00:00.000Z	64 \| moderate	15.554 \| fine	69.362 \| fine	27.678 \| good	0.216 \| good	14.796 \| good	0.166 \| good
2026-10-24T10:00:00.000Z	64 \| moderate	15.935 \| fine	71.004 \| fine	26.422 \| good	0.22 \| good	14.185 \| good	0.163 \| good
2026-10-24T11:00:00.000Z	71 \| moderate	19.621 \| fine	85.93 \| fine	28.059 \| good	0.224 \| good	11.634 \| good	0.153 \| good
2026-10-24T12:00:00.000Z	75 \| moderate	21.793 \| fine	95.525 \| fine	29.852 \| good	0.227 \| good	9.419 \| good	0.144 \| good
2026-10-24T13:00:00.000Z	75 \| moderate	21.781 \| fine	95.192 \| fine	28.091 \| good	0.239 \| good	9.052 \| good	0.143 \| good
2026-10-24T14:00:00.000Z	69 \| moderate	19.351 \| fine	85.645 \| fine	31.84 \| good	0.268 \| good	9.061 \| good	0.149 \| good
2026-10-24T15:00:00.000Z	52 \| moderate	9.697 \| good	43.323 \| good	37.978 \| good	0.284 \| good	3.662 \| good	0.13 \| good
2026-10-24T16:00:00.000Z	34 \| good	5.727 \| good	25.045 \| good	37.108 \| good	0.367 \| good	2.644 \| good	0.132 \| good
2026-10-24T17:00:00.000Z	31 \| good	5.264 \| good	23.121 \| good	33.03 \| good	0.455 \| good	2.307 \| good	0.136 \| good
2026-10-24T18:00:00.000Z	33 \| good	4.368 \| good	19.036 \| good	35.708 \| good	0.522 \| good	2.005 \| good	0.138 \| good
2026-10-24T19:00:00.000Z	37 \| good	4.329 \| good	18.857 \| good	39.883 \| good	0.571 \| good	1.94 \| good	0.14 \| good
2026-10-24T20:00:00.000Z	37 \| good	5.199 \| good	22.354 \| good	40.11 \| good	0.589 \| good	1.93 \| good	0.141 \| good
2026-10-24T21:00:00.000Z	39 \| good	5.822 \| good	25.892 \| good	42.264 \| good	0.579 \| good	1.958 \| good	0.141 \| good

Current air quality index in Four Square Mile, Colorado today

Common air pollutants in Four Square Mile, Colorado

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Four Square Mile, Colorado air quality forecast and history

Empower business decisions with accurate air quality data

Real-time air quality map: Monitor AQI near Four Square Mile, Colorado

Air quality in nearby cities

Cherry Creek, Colorado

Aurora, Colorado

Greenwood Village, Colorado

Englewood, Colorado

Centennial, Colorado

Denver, Colorado

How accurate is Colorado, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently does the air quality data for Four Square Mile, Colorado get updated?

What time in the past 24 hours saw the poorest air quality in Four Square Mile, Colorado?

When was air quality in Four Square Mile, Colorado the best over the past 24 hours?

What is the air quality in Four Square Mile, Colorado right now?

What pollutant is most frequently found in Four Square Mile, Colorado?

What can I do if the air quality in Four Square Mile, Colorado is poor?

What is the PM2.5 concentration in Four Square Mile, Colorado right now?

What is the current level of PM10 in Four Square Mile, Colorado?

What is the current level of carbon monoxide (CO) in Four Square Mile, Colorado?

What is the current level of sulfur dioxide (SO2) in Four Square Mile, Colorado?

What is the current level of ozone (O3) in Four Square Mile, Colorado?

What is the current level of nitrogen dioxide (NO2) in Four Square Mile, Colorado?

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 Four Square Mile, Colorado right now?

What is the current level of PM₁₀ in Four Square Mile, Colorado?

What is the current level of sulfur dioxide (SO₂) in Four Square Mile, Colorado?

What is the current level of ozone (O₃) in Four Square Mile, Colorado?

What is the current level of nitrogen dioxide (NO₂) in Four Square Mile, Colorado?