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

Currently, Winchester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.441 ppb.

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

The current ozone (O3) level in Winchester, Massachusetts at the moment is 42.941 ppm.

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

Nitrogen dioxide (NO2) level in Winchester, Massachusetts at the moment is 10.001 ppb.

Live air quality index in Winchester, Massachusetts today

Name: Live air pollution levels in Winchester, Massachusetts today
Creator: Ambee

Stay updated with real-time air quality in Winchester, 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)

Moderate

Winchester, Massachusetts

Last updated: ... (Local time)

Major air pollutants in Winchester, Massachusetts

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

28.74 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

105.20 μg/m³

155

255

425

605+

Ozone (O₃)

25.04 ppb

201

201+

Sulfur Dioxide (SO₂)

0.32 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.57 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.27 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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Winchester, Massachusetts

Scroll To Air Quality Map

Track live Winchester, Massachusetts air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-30T05:00:00.000Z	52 \| moderate	10.138 \| good	42.372 \| good	40.774 \| good	0.377 \| good	13.376 \| good	0.338 \| good
2025-07-30T06:00:00.000Z	49 \| good	8.745 \| good	36.966 \| good	37.748 \| good	0.312 \| good	15.27 \| good	0.281 \| good
2025-07-30T07:00:00.000Z	44 \| good	8.123 \| good	47.51 \| good	24.115 \| good	0.522 \| good	14.632 \| good	0.349 \| good
2025-07-30T08:00:00.000Z	54 \| moderate	11.185 \| good	45.749 \| good	23.106 \| good	0.538 \| good	15.684 \| good	0.344 \| good
2025-07-30T09:00:00.000Z	52 \| moderate	10.46 \| good	43.183 \| good	17.071 \| good	0.457 \| good	7.819 \| good	0.208 \| good
2025-07-30T10:00:00.000Z	52 \| moderate	9.801 \| good	40.945 \| good	20.994 \| good	0.419 \| good	8.455 \| good	0.217 \| good
2025-07-30T11:00:00.000Z	49 \| good	9.285 \| good	38.702 \| good	19.16 \| good	0.438 \| good	10.577 \| good	0.222 \| good
2025-07-30T12:00:00.000Z	49 \| good	9.035 \| good	37.521 \| good	18.241 \| good	0.465 \| good	10.758 \| good	0.321 \| good
2025-07-30T13:00:00.000Z	52 \| moderate	9.598 \| good	40.077 \| good	25.522 \| good	0.457 \| good	10.163 \| good	0.301 \| good
2025-07-30T14:00:00.000Z	54 \| moderate	10.597 \| good	45.23 \| good	29.02 \| good	0.556 \| good	8.846 \| good	0.264 \| good
2025-07-30T15:00:00.000Z	54 \| moderate	10.638 \| good	45.326 \| good	29.324 \| good	0.415 \| good	5.956 \| good	0.23 \| good
2025-07-30T16:00:00.000Z	54 \| moderate	10.796 \| good	45.384 \| good	35.659 \| good	0.449 \| good	6.671 \| good	0.215 \| good
2025-07-30T17:00:00.000Z	54 \| moderate	10.987 \| good	46.398 \| good	40.106 \| good	0.667 \| good	9.766 \| good	0.252 \| good
2025-07-30T18:00:00.000Z	54 \| moderate	11.273 \| good	49.05 \| good	38.924 \| good	0.596 \| good	7.876 \| good	0.245 \| good
2025-07-30T19:00:00.000Z	56 \| moderate	11.508 \| good	49.121 \| good	48.022 \| good	0.601 \| good	7.131 \| good	0.257 \| good
2025-07-30T20:00:00.000Z	56 \| moderate	11.654 \| good	49.579 \| good	47.145 \| good	0.544 \| good	6.69 \| good	0.257 \| good
2025-07-30T21:00:00.000Z	56 \| moderate	11.614 \| good	49.192 \| good	41.719 \| good	0.599 \| good	7.366 \| good	0.304 \| good
2025-07-30T22:00:00.000Z	56 \| moderate	11.536 \| good	49.153 \| good	40.837 \| good	0.514 \| good	7.559 \| good	0.336 \| good
2025-07-30T23:00:00.000Z	54 \| moderate	11.34 \| good	48.76 \| good	36.276 \| good	0.685 \| good	10.909 \| good	0.26 \| good
2025-07-31T00:00:00.000Z	54 \| moderate	11.031 \| good	47.255 \| good	38.749 \| good	0.467 \| good	6.6 \| good	0.26 \| good
2025-07-31T01:00:00.000Z	54 \| moderate	10.927 \| good	46.273 \| good	41.139 \| good	0.434 \| good	10.758 \| good	0.334 \| good
2025-07-31T02:00:00.000Z	54 \| moderate	10.829 \| good	45.744 \| good	36.974 \| good	0.44 \| good	9.617 \| good	0.292 \| good
2025-07-31T03:00:00.000Z	52 \| moderate	10.428 \| good	43.782 \| good	31.021 \| good	0.436 \| good	7.473 \| good	0.255 \| good
2025-07-31T04:00:00.000Z	52 \| moderate	10.428 \| good	43.782 \| good	31.834 \| good	0.424 \| good	7.481 \| good	0.255 \| good
2025-07-31T05:00:00.000Z	52 \| moderate	10.428 \| good	43.782 \| good	36.536 \| good	0.446 \| good	10.522 \| good	0.299 \| good
2025-07-31T06:00:00.000Z	59 \| moderate	10.433 \| good	71.182 \| fine	35.889 \| good	0.888 \| good	10.46 \| good	0.32 \| good
2025-07-31T07:00:00.000Z	71 \| moderate	20.227 \| fine	61.828 \| fine	22.643 \| good	0.373 \| good	11.613 \| good	0.198 \| good
2025-07-31T08:00:00.000Z	49 \| good	8.984 \| good	35.262 \| good	32.751 \| good	0.404 \| good	12.581 \| good	0.198 \| good
2025-07-31T09:00:00.000Z	49 \| good	8.637 \| good	35.627 \| good	30.428 \| good	0.499 \| good	6.466 \| good	0.166 \| good
2025-07-31T10:00:00.000Z	49 \| good	8.929 \| good	37.394 \| good	31.276 \| good	0.527 \| good	5.237 \| good	0.174 \| good
2025-07-31T11:00:00.000Z	49 \| good	9.456 \| good	39.317 \| good	25.14 \| good	0.464 \| good	5.473 \| good	0.26 \| good
2025-07-31T12:00:00.000Z	54 \| moderate	10.954 \| good	45.317 \| good	26.08 \| good	0.553 \| good	7.075 \| good	0.257 \| good
2025-07-31T13:00:00.000Z	58 \| moderate	13.494 \| fine	56.634 \| fine	24.072 \| good	0.515 \| good	8.178 \| good	0.305 \| good
2025-07-31T14:00:00.000Z	66 \| moderate	16.602 \| fine	68.956 \| fine	25.233 \| good	0.36 \| good	7.998 \| good	0.305 \| good
2025-07-31T15:00:00.000Z	71 \| moderate	19.603 \| fine	80.309 \| fine	26.494 \| good	0.36 \| good	7.825 \| good	0.354 \| good
2025-07-31T16:00:00.000Z	79 \| moderate	23.818 \| fine	97.402 \| fine	26.559 \| good	0.416 \| good	6.215 \| good	0.354 \| good
2025-07-31T17:00:00.000Z	90 \| moderate	29.571 \| fine	119.917 \| fine	22.234 \| good	0.366 \| good	6.507 \| good	0.305 \| good
2025-07-31T18:00:00.000Z	92 \| moderate	31.443 \| fine	127.605 \| fine	21.054 \| good	0.332 \| good	5.923 \| good	0.305 \| good
2025-07-31T19:00:00.000Z	117 \| sensitive	42.294 \| moderate	174.447 \| moderate	25.677 \| good	0.362 \| good	5.363 \| good	0.358 \| good
2025-07-31T20:00:00.000Z	107 \| sensitive	37.926 \| moderate	157.801 \| moderate	26.121 \| good	0.375 \| good	4.308 \| good	0.31 \| good
2025-07-31T21:00:00.000Z	97 \| moderate	34.18 \| fine	139.644 \| fine	25.22 \| good	0.316 \| good	4.827 \| good	0.3 \| good
2025-07-31T22:00:00.000Z	94 \| moderate	31.858 \| fine	127.784 \| fine	25.805 \| good	0.33 \| good	5.764 \| good	0.3 \| good
2025-07-31T23:00:00.000Z	56 \| moderate	12.411 \| fine	55.626 \| fine	23.617 \| good	0.649 \| good	5.225 \| good	0.281 \| good
2025-08-01T00:00:00.000Z	92 \| moderate	30.918 \| fine	124.559 \| fine	24.318 \| good	0.341 \| good	6.891 \| good	0.3 \| good
2025-08-01T01:00:00.000Z	88 \| moderate	28.791 \| fine	115.461 \| fine	23.711 \| good	0.337 \| good	5.541 \| good	0.304 \| good
2025-08-01T02:00:00.000Z	88 \| moderate	28.596 \| fine	114.336 \| fine	23.968 \| good	0.282 \| good	4.906 \| good	0.251 \| good
2025-08-01T03:00:00.000Z	86 \| moderate	27.637 \| fine	111.343 \| fine	24.853 \| good	0.283 \| good	5.379 \| good	0.251 \| good
2025-08-01T04:00:00.000Z	88 \| moderate	28.737 \| fine	105.202 \| fine	25.044 \| good	0.322 \| good	4.569 \| good	0.265 \| good
2025-07-31T02:00:00.000Z	66 \| moderate	16.707 \| fine	74.975 \| fine	31.507 \| good	0.968 \| good	9.586 \| good	0.25 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	16.404 \| fine	72.994 \| fine	30.145 \| good	1.048 \| good	8.951 \| good	0.252 \| good
2025-07-31T04:00:00.000Z	64 \| moderate	16.363 \| fine	73.02 \| fine	29.591 \| good	0.916 \| good	7.189 \| good	0.245 \| good
2025-07-31T05:00:00.000Z	71 \| moderate	19.6 \| fine	86.947 \| fine	26.969 \| good	0.784 \| good	5.426 \| good	0.238 \| good
2025-07-31T06:00:00.000Z	77 \| moderate	22.56 \| fine	98.953 \| fine	23.125 \| good	0.652 \| good	3.664 \| good	0.23 \| good
2025-07-31T07:00:00.000Z	79 \| moderate	23.57 \| fine	103.036 \| fine	24.345 \| good	0.713 \| good	3.569 \| good	0.237 \| good
2025-07-31T08:00:00.000Z	82 \| moderate	25.518 \| fine	110.982 \| fine	22.55 \| good	0.774 \| good	3.474 \| good	0.244 \| good
2025-07-31T09:00:00.000Z	94 \| moderate	31.675 \| fine	136.96 \| fine	20.163 \| good	0.834 \| good	3.379 \| good	0.251 \| good
2025-07-31T10:00:00.000Z	94 \| moderate	31.559 \| fine	136.956 \| fine	20.204 \| good	0.905 \| good	3.862 \| good	0.26 \| good
2025-07-31T11:00:00.000Z	94 \| moderate	32.03 \| fine	138.92 \| fine	25.555 \| good	0.976 \| good	4.344 \| good	0.268 \| good
2025-07-31T12:00:00.000Z	92 \| moderate	31.353 \| fine	135.013 \| fine	27.869 \| good	1.047 \| good	4.826 \| good	0.277 \| good
2025-07-31T13:00:00.000Z	88 \| moderate	29.344 \| fine	127.026 \| fine	29.994 \| good	0.99 \| good	4.256 \| good	0.271 \| good
2025-07-31T14:00:00.000Z	82 \| moderate	25.675 \| fine	111.042 \| fine	30.523 \| good	0.932 \| good	3.686 \| good	0.265 \| good
2025-07-31T15:00:00.000Z	71 \| moderate	19.676 \| fine	86.991 \| fine	32.012 \| good	0.874 \| good	3.116 \| good	0.259 \| good
2025-07-31T16:00:00.000Z	66 \| moderate	17.143 \| fine	76.961 \| fine	35.156 \| good	0.802 \| good	2.746 \| good	0.253 \| good
2025-07-31T17:00:00.000Z	66 \| moderate	16.627 \| fine	73.006 \| fine	34.07 \| good	0.731 \| good	2.375 \| good	0.248 \| good
2025-07-31T18:00:00.000Z	66 \| moderate	17.034 \| fine	75.029 \| fine	34.358 \| good	0.659 \| good	2.005 \| good	0.242 \| good
2025-07-31T19:00:00.000Z	67 \| moderate	17.989 \| fine	79.048 \| fine	32.331 \| good	0.695 \| good	2.469 \| good	0.244 \| good
2025-07-31T20:00:00.000Z	73 \| moderate	21.249 \| fine	93.006 \| fine	26.87 \| good	0.731 \| good	2.932 \| good	0.246 \| good
2025-07-31T21:00:00.000Z	69 \| moderate	18.754 \| fine	82.948 \| fine	22.665 \| good	0.767 \| good	3.396 \| good	0.248 \| good
2025-07-31T22:00:00.000Z	62 \| moderate	15.172 \| fine	66.987 \| fine	20.477 \| good	0.846 \| good	5.012 \| good	0.258 \| good
2025-07-31T23:00:00.000Z	56 \| moderate	11.604 \| good	51.014 \| good	23.279 \| good	0.926 \| good	6.627 \| good	0.268 \| good
2025-08-01T00:00:00.000Z	52 \| moderate	10.497 \| good	46.968 \| good	22.752 \| good	1.005 \| good	8.243 \| good	0.277 \| good
2025-08-01T01:00:00.000Z	54 \| moderate	10.653 \| good	46.989 \| good	21.762 \| good	1.092 \| good	8.89 \| good	0.283 \| good
2025-08-01T02:00:00.000Z	54 \| moderate	10.695 \| good	47.01 \| good	23.353 \| good	1.178 \| good	9.538 \| good	0.288 \| good
2025-08-01T03:00:00.000Z	54 \| moderate	11.486 \| good	50.998 \| good	22.573 \| good	1.265 \| good	10.185 \| good	0.293 \| good
2025-08-01T04:00:00.000Z	56 \| moderate	11.648 \| good	51.043 \| good	22.397 \| good	1.398 \| good	9.939 \| good	0.292 \| good
2025-08-01T05:00:00.000Z	56 \| moderate	12.089 \| good	53.995 \| good	22.906 \| good	1.531 \| good	9.693 \| good	0.29 \| good
2025-08-01T06:00:00.000Z	52 \| moderate	10.481 \| good	46.009 \| good	24.491 \| good	1.665 \| good	9.447 \| good	0.289 \| good
2025-08-01T07:00:00.000Z	52 \| moderate	9.511 \| good	42.978 \| good	24.991 \| good	1.531 \| good	7.929 \| good	0.274 \| good
2025-08-01T08:00:00.000Z	49 \| good	8.521 \| good	37.013 \| good	25.671 \| good	1.397 \| good	6.411 \| good	0.26 \| good
2025-08-01T09:00:00.000Z	44 \| good	7.597 \| good	33.02 \| good	22.391 \| good	1.264 \| good	4.894 \| good	0.245 \| good
2025-08-01T10:00:00.000Z	44 \| good	7.606 \| good	33.974 \| good	19.687 \| good	1.098 \| good	5.087 \| good	0.236 \| good
2025-08-01T11:00:00.000Z	52 \| moderate	9.558 \| good	42.985 \| good	17.709 \| good	0.931 \| good	5.281 \| good	0.226 \| good
2025-08-01T12:00:00.000Z	52 \| moderate	10.081 \| good	44.971 \| good	18.143 \| good	0.765 \| good	5.475 \| good	0.217 \| good
2025-08-01T13:00:00.000Z	44 \| good	8.488 \| good	36.998 \| good	20.765 \| good	0.768 \| good	5.643 \| good	0.214 \| good
2025-08-01T14:00:00.000Z	33 \| good	6.322 \| good	28.003 \| good	23.148 \| good	0.772 \| good	5.812 \| good	0.212 \| good
2025-08-01T15:00:00.000Z	33 \| good	6.363 \| good	28.01 \| good	23.404 \| good	0.775 \| good	5.98 \| good	0.21 \| good
2025-08-01T16:00:00.000Z	33 \| good	6.222 \| good	27.967 \| good	21.694 \| good	0.773 \| good	5.313 \| good	0.204 \| good
2025-08-01T17:00:00.000Z	33 \| good	6.349 \| good	27.969 \| good	21.746 \| good	0.772 \| good	4.645 \| good	0.198 \| good
2025-08-01T18:00:00.000Z	27 \| good	4.917 \| good	21.006 \| good	23.165 \| good	0.77 \| good	3.977 \| good	0.192 \| good
2025-08-01T19:00:00.000Z	22 \| good	4.42 \| good	19.017 \| good	23.551 \| good	0.761 \| good	4.011 \| good	0.192 \| good
2025-08-01T20:00:00.000Z	27 \| good	4.823 \| good	21.01 \| good	23.29 \| good	0.752 \| good	4.044 \| good	0.193 \| good
2025-08-01T21:00:00.000Z	22 \| good	3.857 \| good	17.025 \| good	21.254 \| good	0.743 \| good	4.078 \| good	0.193 \| good
2025-08-01T22:00:00.000Z	22 \| good	4.121 \| good	17.995 \| good	19.854 \| good	0.762 \| good	5.048 \| good	0.199 \| good
2025-08-01T23:00:00.000Z	27 \| good	5.123 \| good	21.982 \| good	16.066 \| good	0.781 \| good	6.019 \| good	0.206 \| good
2025-08-02T00:00:00.000Z	66 \| moderate	17.245 \| fine	18.565 \| good	35.388 \| good	0.805 \| good	7.013 \| good	0.212 \| good
2025-08-02T01:00:00.000Z	52 \| moderate	9.946 \| good	43.999 \| good	16.21 \| good	0.851 \| good	8.102 \| good	0.221 \| good

Winchester

Get reliable air quality data to drive your business

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

0.26ppm

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 Winchester, Massachusetts?

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

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

In the past 24 hours, the air quality in Winchester, Massachusetts was at its worst at 03:00:00 on 2025-07-30.

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

In the last 24 hours, the best air quality in Winchester, Massachusetts was observed at 11:00:00 on 2025-07-30.

What is the AQI in Winchester, Massachusetts right now?

As of now, the AQI in Winchester, Massachusetts is 52, indicating Moderate conditions.

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

Winchester, Massachusetts air has the highest levels of PM2.5.

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

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

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

PM_2.5 levels in Winchester, Massachusetts are currently 9.571 μg/m³.

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

The PM₁₀ concentration in Winchester, Massachusetts is 41.814 μg/m³ at the moment.

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

The current carbon monoxide (CO) concentration in Winchester, Massachusetts is 0.318 ppm.

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

Currently, Winchester, Massachusetts has a sulfur dioxide (SO₂) concentration of 0.441 ppb.

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

The current ozone (O₃) level in Winchester, Massachusetts at the moment is 42.941 ppm.

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

Nitrogen dioxide (NO₂) level in Winchester, Massachusetts at the moment is 10.001 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-07-30T05:00:00.000Z	52 \| moderate	10.138 \| good	42.372 \| good	40.774 \| good	0.377 \| good	13.376 \| good	0.338 \| good
2025-07-30T06:00:00.000Z	49 \| good	8.745 \| good	36.966 \| good	37.748 \| good	0.312 \| good	15.27 \| good	0.281 \| good
2025-07-30T07:00:00.000Z	44 \| good	8.123 \| good	47.51 \| good	24.115 \| good	0.522 \| good	14.632 \| good	0.349 \| good
2025-07-30T08:00:00.000Z	54 \| moderate	11.185 \| good	45.749 \| good	23.106 \| good	0.538 \| good	15.684 \| good	0.344 \| good
2025-07-30T09:00:00.000Z	52 \| moderate	10.46 \| good	43.183 \| good	17.071 \| good	0.457 \| good	7.819 \| good	0.208 \| good
2025-07-30T10:00:00.000Z	52 \| moderate	9.801 \| good	40.945 \| good	20.994 \| good	0.419 \| good	8.455 \| good	0.217 \| good
2025-07-30T11:00:00.000Z	49 \| good	9.285 \| good	38.702 \| good	19.16 \| good	0.438 \| good	10.577 \| good	0.222 \| good
2025-07-30T12:00:00.000Z	49 \| good	9.035 \| good	37.521 \| good	18.241 \| good	0.465 \| good	10.758 \| good	0.321 \| good
2025-07-30T13:00:00.000Z	52 \| moderate	9.598 \| good	40.077 \| good	25.522 \| good	0.457 \| good	10.163 \| good	0.301 \| good
2025-07-30T14:00:00.000Z	54 \| moderate	10.597 \| good	45.23 \| good	29.02 \| good	0.556 \| good	8.846 \| good	0.264 \| good
2025-07-30T15:00:00.000Z	54 \| moderate	10.638 \| good	45.326 \| good	29.324 \| good	0.415 \| good	5.956 \| good	0.23 \| good
2025-07-30T16:00:00.000Z	54 \| moderate	10.796 \| good	45.384 \| good	35.659 \| good	0.449 \| good	6.671 \| good	0.215 \| good
2025-07-30T17:00:00.000Z	54 \| moderate	10.987 \| good	46.398 \| good	40.106 \| good	0.667 \| good	9.766 \| good	0.252 \| good
2025-07-30T18:00:00.000Z	54 \| moderate	11.273 \| good	49.05 \| good	38.924 \| good	0.596 \| good	7.876 \| good	0.245 \| good
2025-07-30T19:00:00.000Z	56 \| moderate	11.508 \| good	49.121 \| good	48.022 \| good	0.601 \| good	7.131 \| good	0.257 \| good
2025-07-30T20:00:00.000Z	56 \| moderate	11.654 \| good	49.579 \| good	47.145 \| good	0.544 \| good	6.69 \| good	0.257 \| good
2025-07-30T21:00:00.000Z	56 \| moderate	11.614 \| good	49.192 \| good	41.719 \| good	0.599 \| good	7.366 \| good	0.304 \| good
2025-07-30T22:00:00.000Z	56 \| moderate	11.536 \| good	49.153 \| good	40.837 \| good	0.514 \| good	7.559 \| good	0.336 \| good
2025-07-30T23:00:00.000Z	54 \| moderate	11.34 \| good	48.76 \| good	36.276 \| good	0.685 \| good	10.909 \| good	0.26 \| good
2025-07-31T00:00:00.000Z	54 \| moderate	11.031 \| good	47.255 \| good	38.749 \| good	0.467 \| good	6.6 \| good	0.26 \| good
2025-07-31T01:00:00.000Z	54 \| moderate	10.927 \| good	46.273 \| good	41.139 \| good	0.434 \| good	10.758 \| good	0.334 \| good
2025-07-31T02:00:00.000Z	54 \| moderate	10.829 \| good	45.744 \| good	36.974 \| good	0.44 \| good	9.617 \| good	0.292 \| good
2025-07-31T03:00:00.000Z	52 \| moderate	10.428 \| good	43.782 \| good	31.021 \| good	0.436 \| good	7.473 \| good	0.255 \| good
2025-07-31T04:00:00.000Z	52 \| moderate	10.428 \| good	43.782 \| good	31.834 \| good	0.424 \| good	7.481 \| good	0.255 \| good
2025-07-31T05:00:00.000Z	52 \| moderate	10.428 \| good	43.782 \| good	36.536 \| good	0.446 \| good	10.522 \| good	0.299 \| good
2025-07-31T06:00:00.000Z	59 \| moderate	10.433 \| good	71.182 \| fine	35.889 \| good	0.888 \| good	10.46 \| good	0.32 \| good
2025-07-31T07:00:00.000Z	71 \| moderate	20.227 \| fine	61.828 \| fine	22.643 \| good	0.373 \| good	11.613 \| good	0.198 \| good
2025-07-31T08:00:00.000Z	49 \| good	8.984 \| good	35.262 \| good	32.751 \| good	0.404 \| good	12.581 \| good	0.198 \| good
2025-07-31T09:00:00.000Z	49 \| good	8.637 \| good	35.627 \| good	30.428 \| good	0.499 \| good	6.466 \| good	0.166 \| good
2025-07-31T10:00:00.000Z	49 \| good	8.929 \| good	37.394 \| good	31.276 \| good	0.527 \| good	5.237 \| good	0.174 \| good
2025-07-31T11:00:00.000Z	49 \| good	9.456 \| good	39.317 \| good	25.14 \| good	0.464 \| good	5.473 \| good	0.26 \| good
2025-07-31T12:00:00.000Z	54 \| moderate	10.954 \| good	45.317 \| good	26.08 \| good	0.553 \| good	7.075 \| good	0.257 \| good
2025-07-31T13:00:00.000Z	58 \| moderate	13.494 \| fine	56.634 \| fine	24.072 \| good	0.515 \| good	8.178 \| good	0.305 \| good
2025-07-31T14:00:00.000Z	66 \| moderate	16.602 \| fine	68.956 \| fine	25.233 \| good	0.36 \| good	7.998 \| good	0.305 \| good
2025-07-31T15:00:00.000Z	71 \| moderate	19.603 \| fine	80.309 \| fine	26.494 \| good	0.36 \| good	7.825 \| good	0.354 \| good
2025-07-31T16:00:00.000Z	79 \| moderate	23.818 \| fine	97.402 \| fine	26.559 \| good	0.416 \| good	6.215 \| good	0.354 \| good
2025-07-31T17:00:00.000Z	90 \| moderate	29.571 \| fine	119.917 \| fine	22.234 \| good	0.366 \| good	6.507 \| good	0.305 \| good
2025-07-31T18:00:00.000Z	92 \| moderate	31.443 \| fine	127.605 \| fine	21.054 \| good	0.332 \| good	5.923 \| good	0.305 \| good
2025-07-31T19:00:00.000Z	117 \| sensitive	42.294 \| moderate	174.447 \| moderate	25.677 \| good	0.362 \| good	5.363 \| good	0.358 \| good
2025-07-31T20:00:00.000Z	107 \| sensitive	37.926 \| moderate	157.801 \| moderate	26.121 \| good	0.375 \| good	4.308 \| good	0.31 \| good
2025-07-31T21:00:00.000Z	97 \| moderate	34.18 \| fine	139.644 \| fine	25.22 \| good	0.316 \| good	4.827 \| good	0.3 \| good
2025-07-31T22:00:00.000Z	94 \| moderate	31.858 \| fine	127.784 \| fine	25.805 \| good	0.33 \| good	5.764 \| good	0.3 \| good
2025-07-31T23:00:00.000Z	56 \| moderate	12.411 \| fine	55.626 \| fine	23.617 \| good	0.649 \| good	5.225 \| good	0.281 \| good
2025-08-01T00:00:00.000Z	92 \| moderate	30.918 \| fine	124.559 \| fine	24.318 \| good	0.341 \| good	6.891 \| good	0.3 \| good
2025-08-01T01:00:00.000Z	88 \| moderate	28.791 \| fine	115.461 \| fine	23.711 \| good	0.337 \| good	5.541 \| good	0.304 \| good
2025-08-01T02:00:00.000Z	88 \| moderate	28.596 \| fine	114.336 \| fine	23.968 \| good	0.282 \| good	4.906 \| good	0.251 \| good
2025-08-01T03:00:00.000Z	86 \| moderate	27.637 \| fine	111.343 \| fine	24.853 \| good	0.283 \| good	5.379 \| good	0.251 \| good
2025-08-01T04:00:00.000Z	88 \| moderate	28.737 \| fine	105.202 \| fine	25.044 \| good	0.322 \| good	4.569 \| good	0.265 \| good
2025-07-31T02:00:00.000Z	66 \| moderate	16.707 \| fine	74.975 \| fine	31.507 \| good	0.968 \| good	9.586 \| good	0.25 \| good
2025-07-31T03:00:00.000Z	64 \| moderate	16.404 \| fine	72.994 \| fine	30.145 \| good	1.048 \| good	8.951 \| good	0.252 \| good
2025-07-31T04:00:00.000Z	64 \| moderate	16.363 \| fine	73.02 \| fine	29.591 \| good	0.916 \| good	7.189 \| good	0.245 \| good
2025-07-31T05:00:00.000Z	71 \| moderate	19.6 \| fine	86.947 \| fine	26.969 \| good	0.784 \| good	5.426 \| good	0.238 \| good
2025-07-31T06:00:00.000Z	77 \| moderate	22.56 \| fine	98.953 \| fine	23.125 \| good	0.652 \| good	3.664 \| good	0.23 \| good
2025-07-31T07:00:00.000Z	79 \| moderate	23.57 \| fine	103.036 \| fine	24.345 \| good	0.713 \| good	3.569 \| good	0.237 \| good
2025-07-31T08:00:00.000Z	82 \| moderate	25.518 \| fine	110.982 \| fine	22.55 \| good	0.774 \| good	3.474 \| good	0.244 \| good
2025-07-31T09:00:00.000Z	94 \| moderate	31.675 \| fine	136.96 \| fine	20.163 \| good	0.834 \| good	3.379 \| good	0.251 \| good
2025-07-31T10:00:00.000Z	94 \| moderate	31.559 \| fine	136.956 \| fine	20.204 \| good	0.905 \| good	3.862 \| good	0.26 \| good
2025-07-31T11:00:00.000Z	94 \| moderate	32.03 \| fine	138.92 \| fine	25.555 \| good	0.976 \| good	4.344 \| good	0.268 \| good
2025-07-31T12:00:00.000Z	92 \| moderate	31.353 \| fine	135.013 \| fine	27.869 \| good	1.047 \| good	4.826 \| good	0.277 \| good
2025-07-31T13:00:00.000Z	88 \| moderate	29.344 \| fine	127.026 \| fine	29.994 \| good	0.99 \| good	4.256 \| good	0.271 \| good
2025-07-31T14:00:00.000Z	82 \| moderate	25.675 \| fine	111.042 \| fine	30.523 \| good	0.932 \| good	3.686 \| good	0.265 \| good
2025-07-31T15:00:00.000Z	71 \| moderate	19.676 \| fine	86.991 \| fine	32.012 \| good	0.874 \| good	3.116 \| good	0.259 \| good
2025-07-31T16:00:00.000Z	66 \| moderate	17.143 \| fine	76.961 \| fine	35.156 \| good	0.802 \| good	2.746 \| good	0.253 \| good
2025-07-31T17:00:00.000Z	66 \| moderate	16.627 \| fine	73.006 \| fine	34.07 \| good	0.731 \| good	2.375 \| good	0.248 \| good
2025-07-31T18:00:00.000Z	66 \| moderate	17.034 \| fine	75.029 \| fine	34.358 \| good	0.659 \| good	2.005 \| good	0.242 \| good
2025-07-31T19:00:00.000Z	67 \| moderate	17.989 \| fine	79.048 \| fine	32.331 \| good	0.695 \| good	2.469 \| good	0.244 \| good
2025-07-31T20:00:00.000Z	73 \| moderate	21.249 \| fine	93.006 \| fine	26.87 \| good	0.731 \| good	2.932 \| good	0.246 \| good
2025-07-31T21:00:00.000Z	69 \| moderate	18.754 \| fine	82.948 \| fine	22.665 \| good	0.767 \| good	3.396 \| good	0.248 \| good
2025-07-31T22:00:00.000Z	62 \| moderate	15.172 \| fine	66.987 \| fine	20.477 \| good	0.846 \| good	5.012 \| good	0.258 \| good
2025-07-31T23:00:00.000Z	56 \| moderate	11.604 \| good	51.014 \| good	23.279 \| good	0.926 \| good	6.627 \| good	0.268 \| good
2025-08-01T00:00:00.000Z	52 \| moderate	10.497 \| good	46.968 \| good	22.752 \| good	1.005 \| good	8.243 \| good	0.277 \| good
2025-08-01T01:00:00.000Z	54 \| moderate	10.653 \| good	46.989 \| good	21.762 \| good	1.092 \| good	8.89 \| good	0.283 \| good
2025-08-01T02:00:00.000Z	54 \| moderate	10.695 \| good	47.01 \| good	23.353 \| good	1.178 \| good	9.538 \| good	0.288 \| good
2025-08-01T03:00:00.000Z	54 \| moderate	11.486 \| good	50.998 \| good	22.573 \| good	1.265 \| good	10.185 \| good	0.293 \| good
2025-08-01T04:00:00.000Z	56 \| moderate	11.648 \| good	51.043 \| good	22.397 \| good	1.398 \| good	9.939 \| good	0.292 \| good
2025-08-01T05:00:00.000Z	56 \| moderate	12.089 \| good	53.995 \| good	22.906 \| good	1.531 \| good	9.693 \| good	0.29 \| good
2025-08-01T06:00:00.000Z	52 \| moderate	10.481 \| good	46.009 \| good	24.491 \| good	1.665 \| good	9.447 \| good	0.289 \| good
2025-08-01T07:00:00.000Z	52 \| moderate	9.511 \| good	42.978 \| good	24.991 \| good	1.531 \| good	7.929 \| good	0.274 \| good
2025-08-01T08:00:00.000Z	49 \| good	8.521 \| good	37.013 \| good	25.671 \| good	1.397 \| good	6.411 \| good	0.26 \| good
2025-08-01T09:00:00.000Z	44 \| good	7.597 \| good	33.02 \| good	22.391 \| good	1.264 \| good	4.894 \| good	0.245 \| good
2025-08-01T10:00:00.000Z	44 \| good	7.606 \| good	33.974 \| good	19.687 \| good	1.098 \| good	5.087 \| good	0.236 \| good
2025-08-01T11:00:00.000Z	52 \| moderate	9.558 \| good	42.985 \| good	17.709 \| good	0.931 \| good	5.281 \| good	0.226 \| good
2025-08-01T12:00:00.000Z	52 \| moderate	10.081 \| good	44.971 \| good	18.143 \| good	0.765 \| good	5.475 \| good	0.217 \| good
2025-08-01T13:00:00.000Z	44 \| good	8.488 \| good	36.998 \| good	20.765 \| good	0.768 \| good	5.643 \| good	0.214 \| good
2025-08-01T14:00:00.000Z	33 \| good	6.322 \| good	28.003 \| good	23.148 \| good	0.772 \| good	5.812 \| good	0.212 \| good
2025-08-01T15:00:00.000Z	33 \| good	6.363 \| good	28.01 \| good	23.404 \| good	0.775 \| good	5.98 \| good	0.21 \| good
2025-08-01T16:00:00.000Z	33 \| good	6.222 \| good	27.967 \| good	21.694 \| good	0.773 \| good	5.313 \| good	0.204 \| good
2025-08-01T17:00:00.000Z	33 \| good	6.349 \| good	27.969 \| good	21.746 \| good	0.772 \| good	4.645 \| good	0.198 \| good
2025-08-01T18:00:00.000Z	27 \| good	4.917 \| good	21.006 \| good	23.165 \| good	0.77 \| good	3.977 \| good	0.192 \| good
2025-08-01T19:00:00.000Z	22 \| good	4.42 \| good	19.017 \| good	23.551 \| good	0.761 \| good	4.011 \| good	0.192 \| good
2025-08-01T20:00:00.000Z	27 \| good	4.823 \| good	21.01 \| good	23.29 \| good	0.752 \| good	4.044 \| good	0.193 \| good
2025-08-01T21:00:00.000Z	22 \| good	3.857 \| good	17.025 \| good	21.254 \| good	0.743 \| good	4.078 \| good	0.193 \| good
2025-08-01T22:00:00.000Z	22 \| good	4.121 \| good	17.995 \| good	19.854 \| good	0.762 \| good	5.048 \| good	0.199 \| good
2025-08-01T23:00:00.000Z	27 \| good	5.123 \| good	21.982 \| good	16.066 \| good	0.781 \| good	6.019 \| good	0.206 \| good
2025-08-02T00:00:00.000Z	66 \| moderate	17.245 \| fine	18.565 \| good	35.388 \| good	0.805 \| good	7.013 \| good	0.212 \| good
2025-08-02T01:00:00.000Z	52 \| moderate	9.946 \| good	43.999 \| good	16.21 \| good	0.851 \| good	8.102 \| good	0.221 \| good

Live air quality index in Winchester, Massachusetts today

Major air pollutants in Winchester, Massachusetts

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)