What is the PM10 level in Waltham, Massachusetts at the moment?

The PM10 concentration in Waltham, Massachusetts is 10 μg/m3 at the moment.

What is the sulfur dioxide (SO2) level in Waltham, Massachusetts at the moment?

Currently, Waltham, Massachusetts has a sulfur dioxide (SO2) concentration of 0.356 ppb.

What is the ozone (O3) level in Waltham, Massachusetts at the moment?

The current ozone (O3) level in Waltham, Massachusetts at the moment is 30.93 ppm.

What is the nitrogen dioxide (NO2) level in Waltham, Massachusetts at the moment?

Nitrogen dioxide (NO2) level in Waltham, Massachusetts at the moment is 5.109 ppb.

Live air quality index in Waltham, Massachusetts today

Q: What is the PM2.5 level in Waltham, Massachusetts at the moment?

PM2.5 levels in Waltham, Massachusetts are currently 3.618 μg/m3.

Stay updated with real-time air quality in Waltham, Massachusetts 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

Waltham, Massachusetts

Last updated: ... (Local time)

Major air pollutants in Waltham, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

3.62 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

10.00 μg/m³

155

255

425

605+

Ozone (O₃)

30.93 ppb

201

201+

Sulfur Dioxide (SO₂)

0.36 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

5.11 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.17 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Looks like we don't have this data available right now

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Waltham, Massachusetts

Scroll To Air Quality Map

Track live Waltham, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-02-10T08:00:00.000Z	23 \| good	4.08 \| good	13.368 \| good	25.133 \| good	0.373 \| good	14.996 \| good	0.222 \| good
2026-02-10T09:00:00.000Z	27 \| good	5.081 \| good	19.511 \| good	25.526 \| good	0.391 \| good	19.843 \| good	0.31 \| good
2026-02-10T10:00:00.000Z	83 \| moderate	19.541 \| fine	118.507 \| fine	22.188 \| good	0.357 \| good	18.316 \| good	0.344 \| good
2026-02-10T11:00:00.000Z	94 \| moderate	25.664 \| fine	141.017 \| fine	17.067 \| good	0.458 \| good	27.284 \| good	0.433 \| good
2026-02-10T12:00:00.000Z	63 \| moderate	15.373 \| fine	78.803 \| fine	11.542 \| good	0.579 \| good	34.138 \| good	0.586 \| good
2026-02-10T13:00:00.000Z	38 \| good	7.305 \| good	26.987 \| good	12.994 \| good	0.588 \| good	31.482 \| good	0.618 \| good
2026-02-10T14:00:00.000Z	52 \| moderate	9.782 \| good	46.595 \| good	18.305 \| good	0.921 \| good	27.494 \| good	0.563 \| good
2026-02-10T15:00:00.000Z	44 \| good	7.908 \| good	29.359 \| good	28.185 \| good	0.852 \| good	22.122 \| good	0.343 \| good
2026-02-10T16:00:00.000Z	35 \| good	6.135 \| good	38.064 \| good	24.42 \| good	0.684 \| good	20.861 \| good	0.345 \| good
2026-02-10T17:00:00.000Z	33 \| good	5.522 \| good	21.659 \| good	28.155 \| good	0.499 \| good	18.28 \| good	0.311 \| good
2026-02-10T18:00:00.000Z	27 \| good	5.214 \| good	15.62 \| good	29.354 \| good	0.557 \| good	18.264 \| good	0.282 \| good
2026-02-10T19:00:00.000Z	30 \| good	4.631 \| good	13.563 \| good	31.784 \| good	0.397 \| good	20.53 \| good	0.28 \| good
2026-02-10T20:00:00.000Z	38 \| good	6.646 \| good	24.9 \| good	32.193 \| good	0.398 \| good	21.166 \| good	0.383 \| good
2026-02-10T21:00:00.000Z	33 \| good	5.886 \| good	23.912 \| good	26.862 \| good	0.494 \| good	26.042 \| good	0.349 \| good
2026-02-10T22:00:00.000Z	49 \| good	9.383 \| good	31.804 \| good	25.482 \| good	0.695 \| good	30.927 \| good	0.468 \| good
2026-02-10T23:00:00.000Z	44 \| good	8.19 \| good	22.338 \| good	28.868 \| good	0.526 \| good	25.003 \| good	0.753 \| good
2026-02-11T00:00:00.000Z	33 \| good	5.531 \| good	24.18 \| good	29.142 \| good	2.892 \| good	21.872 \| good	0.649 \| good
2026-02-11T01:00:00.000Z	38 \| good	7.378 \| good	27.642 \| good	26.545 \| good	3.67 \| good	20.282 \| good	0.718 \| good
2026-02-11T02:00:00.000Z	38 \| good	7.231 \| good	30.639 \| good	25.261 \| good	0.691 \| good	20.265 \| good	0.692 \| good
2026-02-11T03:00:00.000Z	38 \| good	7.249 \| good	26.085 \| good	25.651 \| good	0.698 \| good	19.657 \| good	0.667 \| good
2026-02-11T04:00:00.000Z	44 \| good	7.788 \| good	32.021 \| good	29.686 \| good	4.068 \| good	16.209 \| good	0.692 \| good
2026-02-11T05:00:00.000Z	49 \| good	9.39 \| good	38.067 \| good	31.445 \| good	8.246 \| good	18.761 \| good	0.587 \| good
2026-02-11T06:00:00.000Z	54 \| moderate	11.376 \| good	37.922 \| good	28.405 \| good	4.36 \| good	15.249 \| good	0.692 \| good
2026-02-11T07:00:00.000Z	49 \| good	9.487 \| good	29.108 \| good	27.851 \| good	4.251 \| good	18.941 \| good	0.692 \| good
2026-02-11T08:00:00.000Z	52 \| moderate	9.991 \| good	47.65 \| good	26.924 \| good	4.205 \| good	22.319 \| good	0.692 \| good
2026-02-11T09:00:00.000Z	54 \| moderate	10.856 \| good	38.44 \| good	27.249 \| good	4.237 \| good	21.453 \| good	0.712 \| good
2026-02-11T10:00:00.000Z	60 \| moderate	14.088 \| fine	29.835 \| good	25.276 \| good	3.202 \| good	26.716 \| good	0.746 \| good
2026-02-11T11:00:00.000Z	62 \| moderate	15.437 \| fine	31.345 \| good	17.137 \| good	3.402 \| good	24.269 \| good	0.727 \| good
2026-02-11T12:00:00.000Z	62 \| moderate	15.304 \| fine	54.336 \| good	19.952 \| good	3.534 \| good	24.223 \| good	0.772 \| good
2026-02-11T13:00:00.000Z	64 \| moderate	16.371 \| fine	58.7 \| fine	23.201 \| good	3.382 \| good	23.389 \| good	0.773 \| good
2026-02-11T14:00:00.000Z	67 \| moderate	18.31 \| fine	85.437 \| fine	22.191 \| good	3.296 \| good	19.719 \| good	0.816 \| good
2026-02-11T15:00:00.000Z	71 \| moderate	19.897 \| fine	39.734 \| good	25.036 \| good	3.122 \| good	16.635 \| good	0.816 \| good
2026-02-11T16:00:00.000Z	64 \| moderate	16.167 \| fine	57.637 \| fine	27.159 \| good	3.112 \| good	12.749 \| good	0.805 \| good
2026-02-11T17:00:00.000Z	62 \| moderate	15.072 \| fine	66.487 \| fine	32.786 \| good	3.154 \| good	10.365 \| good	0.794 \| good
2026-02-11T18:00:00.000Z	56 \| moderate	11.617 \| good	31.458 \| good	30.365 \| good	0.494 \| good	10.603 \| good	0.256 \| good
2026-02-11T19:00:00.000Z	44 \| good	8.299 \| good	15.778 \| good	29.261 \| good	0.487 \| good	9.008 \| good	0.246 \| good
2026-02-11T20:00:00.000Z	33 \| good	6.389 \| good	25.891 \| good	29.484 \| good	0.481 \| good	8.684 \| good	0.256 \| good
2026-02-11T21:00:00.000Z	31 \| good	4.972 \| good	22.133 \| good	32.874 \| good	0.452 \| good	8.479 \| good	0.246 \| good
2026-02-11T22:00:00.000Z	29 \| good	3.605 \| good	14.025 \| good	30.971 \| good	0.411 \| good	8.843 \| good	0.244 \| good
2026-02-11T23:00:00.000Z	29 \| good	2.529 \| good	8.002 \| good	30.765 \| good	0.411 \| good	8.656 \| good	0.244 \| good
2026-02-12T00:00:00.000Z	26 \| good	2.704 \| good	6.294 \| good	27.856 \| good	0.412 \| good	7.955 \| good	0.234 \| good
2026-02-12T01:00:00.000Z	27 \| good	2.344 \| good	4.853 \| good	29.295 \| good	0.412 \| good	7.71 \| good	0.234 \| good
2026-02-12T02:00:00.000Z	26 \| good	2.299 \| good	8.258 \| good	28.234 \| good	0.413 \| good	8.174 \| good	0.234 \| good
2026-02-12T03:00:00.000Z	28 \| good	2.789 \| good	8.385 \| good	29.773 \| good	0.405 \| good	7.757 \| good	0.2 \| good
2026-02-12T04:00:00.000Z	26 \| good	3.491 \| good	13.396 \| good	27.602 \| good	0.52 \| good	7.243 \| good	0.2 \| good
2026-02-12T05:00:00.000Z	31 \| good	3.566 \| good	16.028 \| good	34.345 \| good	0.4 \| good	6.245 \| good	0.19 \| good
2026-02-12T06:00:00.000Z	29 \| good	3.46 \| good	15.112 \| good	31.484 \| good	0.356 \| good	5.097 \| good	0.166 \| good
2026-02-12T07:00:00.000Z	29 \| good	3.618 \| good	10 \| good	30.93 \| good	0.356 \| good	5.109 \| good	0.166 \| good
2026-02-12T07:00:00.000Z	29 \| good	3.618 \| good	10 \| good	30.93 \| good	0.356 \| good	5.109 \| good	0.166 \| good
2026-02-12T08:00:00.000Z	54 \| moderate	11.305 \| good	49.863 \| good	35.433 \| good	0.588 \| good	2.878 \| good	0.165 \| good
2026-02-12T09:00:00.000Z	56 \| moderate	12.262 \| fine	55.241 \| fine	30.684 \| good	0.559 \| good	2.699 \| good	0.161 \| good
2026-02-12T10:00:00.000Z	58 \| moderate	13.079 \| fine	59.005 \| fine	28.084 \| good	0.612 \| good	3.727 \| good	0.167 \| good
2026-02-12T11:00:00.000Z	62 \| moderate	15.038 \| fine	67.042 \| fine	24.518 \| good	0.665 \| good	4.754 \| good	0.173 \| good
2026-02-12T12:00:00.000Z	62 \| moderate	14.859 \| fine	66.438 \| fine	25.184 \| good	0.718 \| good	5.782 \| good	0.18 \| good
2026-02-12T13:00:00.000Z	56 \| moderate	12.384 \| fine	56.303 \| fine	28.837 \| good	0.776 \| good	5.223 \| good	0.184 \| good
2026-02-12T14:00:00.000Z	52 \| moderate	9.666 \| good	43.031 \| good	33.652 \| good	0.834 \| good	4.664 \| good	0.188 \| good
2026-02-12T15:00:00.000Z	44 \| good	8.401 \| good	36.868 \| good	35.592 \| good	0.892 \| good	4.105 \| good	0.192 \| good
2026-02-12T16:00:00.000Z	49 \| good	9.195 \| good	40.951 \| good	37.184 \| good	0.789 \| good	3.366 \| good	0.182 \| good
2026-02-12T17:00:00.000Z	49 \| good	8.61 \| good	37.722 \| good	36.398 \| good	0.685 \| good	2.626 \| good	0.172 \| good
2026-02-12T18:00:00.000Z	49 \| good	8.784 \| good	38.631 \| good	36.989 \| good	0.581 \| good	1.887 \| good	0.161 \| good
2026-02-12T19:00:00.000Z	44 \| good	8.372 \| good	36.804 \| good	38.03 \| good	0.596 \| good	2.777 \| good	0.164 \| good
2026-02-12T20:00:00.000Z	34 \| good	4.236 \| good	18.407 \| good	36.919 \| good	0.611 \| good	3.667 \| good	0.166 \| good
2026-02-12T21:00:00.000Z	33 \| good	2.273 \| good	9.328 \| good	36.224 \| good	0.626 \| good	4.557 \| good	0.169 \| good
2026-02-12T22:00:00.000Z	31 \| good	2.495 \| good	10.038 \| good	33.277 \| good	0.639 \| good	6.225 \| good	0.175 \| good
2026-02-12T23:00:00.000Z	29 \| good	1.543 \| good	6.448 \| good	31.172 \| good	0.652 \| good	7.893 \| good	0.181 \| good
2026-02-13T00:00:00.000Z	30 \| good	2.806 \| good	11.854 \| good	31.87 \| good	0.665 \| good	9.561 \| good	0.188 \| good
2026-02-13T01:00:00.000Z	28 \| good	2.45 \| good	9.963 \| good	30.444 \| good	0.671 \| good	8.79 \| good	0.183 \| good
2026-02-13T02:00:00.000Z	29 \| good	2.762 \| good	11.61 \| good	31.182 \| good	0.676 \| good	8.018 \| good	0.179 \| good
2026-02-13T03:00:00.000Z	34 \| good	1.832 \| good	7.42 \| good	36.688 \| good	0.682 \| good	7.247 \| good	0.174 \| good
2026-02-13T04:00:00.000Z	34 \| good	2.12 \| good	8.559 \| good	37.021 \| good	0.643 \| good	6.288 \| good	0.171 \| good
2026-02-13T05:00:00.000Z	32 \| good	2.29 \| good	9.638 \| good	34.91 \| good	0.605 \| good	5.33 \| good	0.167 \| good
2026-02-13T06:00:00.000Z	30 \| good	2.945 \| good	12.091 \| good	32.271 \| good	0.566 \| good	4.371 \| good	0.164 \| good
2026-02-13T07:00:00.000Z	29 \| good	3.18 \| good	13.656 \| good	31.261 \| good	0.546 \| good	4.154 \| good	0.161 \| good
2026-02-13T08:00:00.000Z	25 \| good	2.806 \| good	11.454 \| good	27.244 \| good	0.526 \| good	3.937 \| good	0.158 \| good
2026-02-13T09:00:00.000Z	21 \| good	3.086 \| good	12.456 \| good	23.493 \| good	0.506 \| good	3.72 \| good	0.156 \| good
2026-02-13T10:00:00.000Z	22 \| good	3.625 \| good	16.085 \| good	21.467 \| good	0.559 \| good	5.273 \| good	0.163 \| good
2026-02-13T11:00:00.000Z	18 \| good	2.898 \| good	12.039 \| good	18.51 \| good	0.612 \| good	6.827 \| good	0.17 \| good
2026-02-13T12:00:00.000Z	18 \| good	2.278 \| good	9.286 \| good	18.748 \| good	0.665 \| good	8.38 \| good	0.178 \| good
2026-02-13T13:00:00.000Z	23 \| good	2.125 \| good	8.838 \| good	25.218 \| good	0.757 \| good	7.403 \| good	0.18 \| good
2026-02-13T14:00:00.000Z	31 \| good	1.571 \| good	6.186 \| good	32.562 \| good	0.848 \| good	6.426 \| good	0.183 \| good
2026-02-13T15:00:00.000Z	32 \| good	1.214 \| good	5.039 \| good	35.006 \| good	0.939 \| good	5.449 \| good	0.186 \| good
2026-02-13T16:00:00.000Z	34 \| good	1.11 \| good	4.742 \| good	36.937 \| good	0.944 \| good	4.888 \| good	0.179 \| good
2026-02-13T17:00:00.000Z	33 \| good	0.285 \| good	0.954 \| good	35.967 \| good	0.949 \| good	4.328 \| good	0.172 \| good
2026-02-13T18:00:00.000Z	32 \| good	1.168 \| good	4.648 \| good	35.084 \| good	0.955 \| good	3.768 \| good	0.165 \| good
2026-02-13T19:00:00.000Z	33 \| good	0.423 \| good	1.552 \| good	36.485 \| good	0.922 \| good	5.17 \| good	0.171 \| good
2026-02-13T20:00:00.000Z	33 \| good	0.834 \| good	3.323 \| good	36.412 \| good	0.889 \| good	6.572 \| good	0.177 \| good
2026-02-13T21:00:00.000Z	30 \| good	0.735 \| good	2.883 \| good	32.272 \| good	0.857 \| good	7.974 \| good	0.183 \| good
2026-02-13T22:00:00.000Z	24 \| good	2.156 \| good	8.618 \| good	26.072 \| good	0.966 \| good	17.314 \| good	0.248 \| good
2026-02-13T23:00:00.000Z	25 \| good	2.583 \| good	10.541 \| good	23.825 \| good	1.076 \| good	26.654 \| good	0.314 \| good
2026-02-14T00:00:00.000Z	34 \| good	2.066 \| good	8.193 \| good	26.388 \| good	1.185 \| good	35.994 \| good	0.379 \| good
2026-02-14T01:00:00.000Z	30 \| good	3.224 \| good	13.34 \| good	25.375 \| good	1.073 \| good	31.506 \| good	0.338 \| good
2026-02-14T02:00:00.000Z	33 \| good	5.952 \| good	25.89 \| good	24.24 \| good	0.96 \| good	27.017 \| good	0.297 \| good
2026-02-14T03:00:00.000Z	38 \| good	6.967 \| good	30.758 \| good	27.319 \| good	0.848 \| good	22.528 \| good	0.256 \| good
2026-02-14T04:00:00.000Z	33 \| good	6.222 \| good	27.757 \| good	30.53 \| good	0.757 \| good	18 \| good	0.236 \| good
2026-02-14T05:00:00.000Z	33 \| good	5.637 \| good	24.128 \| good	31.977 \| good	0.666 \| good	13.473 \| good	0.216 \| good
2026-02-14T06:00:00.000Z	49 \| good	9.017 \| good	9.181 \| good	30.933 \| good	0.577 \| good	9.02 \| good	0.197 \| good
2026-02-14T07:00:00.000Z	38 \| good	6.5 \| good	28.716 \| good	27.905 \| good	0.6 \| good	8.556 \| good	0.193 \| good

Waltham

Get reliable air quality data to drive your business

Waltham, Massachusetts air quality map: Stay updated on AQI near you

0.15ppm

How accurate is Massachusetts, USA air quality data?

Air quality and pollutant data for Massachusetts, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.

Source: Ambee Data Sources

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Frequently asked questions

How often is air quality information updated for Waltham, Massachusetts?

The air quality information for Waltham, Massachusetts is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Waltham, Massachusetts at its worst?

In the past 24 hours, the air quality in Waltham, Massachusetts was at its worst at 03:00:00 on 2026-02-11.

When did Waltham, Massachusetts experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Waltham, Massachusetts was observed at 04:00:00 on 2026-02-12.

What is the AQI in Waltham, Massachusetts right now?

As of now, the AQI in Waltham, Massachusetts is 29, indicating Good conditions.

What is the most common type of pollution in Waltham, Massachusetts?

Waltham, Massachusetts air has the highest levels of O3.

What should I do in case of poor air quality in Waltham, Massachusetts?

Poor air quality in Waltham, Massachusetts means it's advisable to stay indoors and wear a mask for your protection.

What is the PM_2.5 level in Waltham, Massachusetts at the moment?

PM_2.5 levels in Waltham, Massachusetts are currently 3.618 μg/m³.

What is the PM₁₀ level in Waltham, Massachusetts at the moment?

The PM₁₀ concentration in Waltham, Massachusetts is 10 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Waltham, Massachusetts at the moment?

The current carbon monoxide (CO) concentration in Waltham, Massachusetts is 0.166 ppm.

What is the sulfur dioxide (SO₂) level in Waltham, Massachusetts at the moment?

Currently, Waltham, Massachusetts has a sulfur dioxide (SO₂) concentration of 0.356 ppb.

What is the ozone (O₃) level in Waltham, Massachusetts at the moment?

The current ozone (O₃) level in Waltham, Massachusetts at the moment is 30.93 ppm.

What is the nitrogen dioxide (NO₂) level in Waltham, Massachusetts at the moment?

Nitrogen dioxide (NO₂) level in Waltham, Massachusetts at the moment is 5.109 ppb.

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