What are the current PM10 levels at Norristown, Pennsylvania?

The current PM10 levels in Norristown, Pennsylvania are 16.371 μg/m3.

What are the current sulfur dioxide (SO2) levels at Norristown, Pennsylvania?

The current sulfur dioxide (SO2) levels in Norristown, Pennsylvania are 0.188 ppb.

What are the current ozone (O3) levels at Norristown, Pennsylvania?

The current ozone (O3) levels at Norristown, Pennsylvania is 42.402 ppm.

What are the current nitrogen dioxide (NO2) levels at Norristown, Pennsylvania?

The current nitrogen dioxide (NO2) levels at Norristown, Pennsylvania is 4.097 ppb.

Real-time air quality index in Norristown, Pennsylvania today

Q: What are the current PM2.5 levels in Norristown, Pennsylvania?

The measured PM2.5 levels in Norristown, Pennsylvania at present are 3.686 μg/m3.

Stay updated with real-time air quality in Norristown, Pennsylvania 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

Norristown, Pennsylvania

Last updated: ... (Local time)

Common air pollutants in Norristown, Pennsylvania

Good

Fine

Moderate

Poor

Very poor

Hazardous

Particulate Matter_2.5 (PM_2.5)

3.69 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

16.37 μg/m³

155

255

425

605+

Ozone (O₃)

42.40 ppb

201

201+

Sulfur Dioxide (SO₂)

0.19 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

4.10 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.25 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Norristown, Pennsylvania

Get Live Pollen Counts

Norristown, Pennsylvania

Scroll To Air Quality Map

Track live Norristown, Pennsylvania air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T23:00:00.000Z	44 \| good	8.14 \| good	35.658 \| good	31.353 \| good	0.343 \| good	9.101 \| good	0.416 \| good
2026-07-22T00:00:00.000Z	44 \| good	7.888 \| good	34.423 \| good	30.214 \| good	0.368 \| good	7.802 \| good	0.4 \| good
2026-07-22T01:00:00.000Z	33 \| good	6.354 \| good	28.677 \| good	27.34 \| good	0.372 \| good	8.722 \| good	0.454 \| good
2026-07-22T02:00:00.000Z	27 \| good	5.131 \| good	22.592 \| good	26.469 \| good	0.367 \| good	6.902 \| good	0.37 \| good
2026-07-22T03:00:00.000Z	27 \| good	4.618 \| good	20.523 \| good	25.413 \| good	0.388 \| good	9.128 \| good	0.367 \| good
2026-07-22T04:00:00.000Z	26 \| good	4.438 \| good	19.618 \| good	28.252 \| good	0.388 \| good	10.534 \| good	0.367 \| good
2026-07-22T05:00:00.000Z	27 \| good	4.612 \| good	20.487 \| good	27.285 \| good	0.414 \| good	9.82 \| good	0.351 \| good
2026-07-22T06:00:00.000Z	27 \| good	4.606 \| good	20.462 \| good	26.294 \| good	0.486 \| good	5.436 \| good	0.335 \| good
2026-07-22T07:00:00.000Z	27 \| good	4.584 \| good	20.366 \| good	26.314 \| good	0.486 \| good	5.857 \| good	0.335 \| good
2026-07-22T08:00:00.000Z	27 \| good	4.566 \| good	20.286 \| good	24.31 \| good	0.383 \| good	5.11 \| good	0.276 \| good
2026-07-22T09:00:00.000Z	27 \| good	4.754 \| good	21.223 \| good	24.249 \| good	0.388 \| good	6.714 \| good	0.3 \| good
2026-07-22T10:00:00.000Z	27 \| good	4.845 \| good	21.214 \| good	24.139 \| good	0.493 \| good	11.02 \| good	0.3 \| good
2026-07-22T11:00:00.000Z	27 \| good	4.842 \| good	21.188 \| good	23.135 \| good	0.493 \| good	7.566 \| good	0.351 \| good
2026-07-22T12:00:00.000Z	27 \| good	4.754 \| good	21.225 \| good	23.034 \| good	0.601 \| good	9.158 \| good	0.428 \| good
2026-07-22T13:00:00.000Z	27 \| good	4.756 \| good	21.251 \| good	23.089 \| good	0.56 \| good	15.223 \| good	0.428 \| good
2026-07-22T14:00:00.000Z	27 \| good	5.451 \| good	23.267 \| good	25.061 \| good	0.551 \| good	10.894 \| good	0.396 \| good
2026-07-22T15:00:00.000Z	38 \| good	6.714 \| good	30.056 \| good	28.015 \| good	0.543 \| good	10.083 \| good	0.396 \| good
2026-07-22T16:00:00.000Z	44 \| good	8.135 \| good	36.169 \| good	31.162 \| good	0.436 \| good	8.65 \| good	0.396 \| good
2026-07-22T17:00:00.000Z	49 \| good	8.976 \| good	39.378 \| good	34.221 \| good	0.409 \| good	7.905 \| good	0.396 \| good
2026-07-22T18:00:00.000Z	49 \| good	9.427 \| good	42.556 \| good	38.195 \| good	0.452 \| good	7.155 \| good	0.375 \| good
2026-07-22T19:00:00.000Z	52 \| moderate	9.566 \| good	42.749 \| good	40.321 \| good	0.451 \| good	7.39 \| good	0.375 \| good
2026-07-22T20:00:00.000Z	49 \| good	9.488 \| good	42.837 \| good	45.245 \| good	0.425 \| good	7.293 \| good	0.375 \| good
2026-07-22T21:00:00.000Z	49 \| good	9.287 \| good	41.821 \| good	42.318 \| good	0.419 \| good	9.582 \| good	0.375 \| good
2026-07-22T22:00:00.000Z	49 \| good	8.691 \| good	37.945 \| good	41.465 \| good	0.364 \| good	7.669 \| good	0.333 \| good
2026-07-22T23:00:00.000Z	44 \| good	8.089 \| good	35.867 \| good	40.376 \| good	0.483 \| good	6.866 \| good	0.357 \| good
2026-07-23T00:00:00.000Z	44 \| good	7.965 \| good	34.778 \| good	36.496 \| good	0.453 \| good	10.092 \| good	0.34 \| good
2026-07-23T01:00:00.000Z	44 \| good	7.76 \| good	34.725 \| good	31.504 \| good	0.391 \| good	8.746 \| good	0.341 \| good
2026-07-23T02:00:00.000Z	38 \| good	7.186 \| good	31.84 \| good	30.565 \| good	0.385 \| good	6.115 \| good	0.316 \| good
2026-07-23T03:00:00.000Z	18 \| good	0.645 \| good	2.412 \| good	19.36 \| good	0.648 \| good	6.921 \| good	0.202 \| good
2026-07-23T04:00:00.000Z	33 \| good	5.96 \| good	25.746 \| good	30.218 \| good	0.375 \| good	5.739 \| good	0.261 \| good
2026-07-23T05:00:00.000Z	27 \| good	5.249 \| good	22.702 \| good	26.362 \| good	0.375 \| good	5.458 \| good	0.261 \| good
2026-07-23T06:00:00.000Z	27 \| good	4.633 \| good	20.578 \| good	23.399 \| good	0.38 \| good	4.925 \| good	0.245 \| good
2026-07-23T07:00:00.000Z	22 \| good	4.122 \| good	18.517 \| good	23.341 \| good	0.411 \| good	4.198 \| good	0.245 \| good
2026-07-23T08:00:00.000Z	22 \| good	3.611 \| good	16.482 \| good	22.259 \| good	0.372 \| good	4.407 \| good	0.245 \| good
2026-07-23T09:00:00.000Z	19 \| good	3.394 \| good	15.402 \| good	20.366 \| good	0.465 \| good	5.286 \| good	0.245 \| good
2026-07-23T10:00:00.000Z	18 \| good	3.279 \| good	14.341 \| good	19.382 \| good	0.465 \| good	8.693 \| good	0.249 \| good
2026-07-23T11:00:00.000Z	19 \| good	3.272 \| good	14.306 \| good	20.229 \| good	0.484 \| good	11.575 \| good	0.298 \| good
2026-07-23T12:00:00.000Z	19 \| good	3.272 \| good	14.307 \| good	20.114 \| good	0.398 \| good	14.06 \| good	0.343 \| good
2026-07-23T13:00:00.000Z	19 \| good	3.279 \| good	14.351 \| good	21.218 \| good	0.527 \| good	12.618 \| good	0.31 \| good
2026-07-23T14:00:00.000Z	27 \| good	4.541 \| good	18.357 \| good	22.312 \| good	0.507 \| good	10.435 \| good	0.27 \| good
2026-07-23T15:00:00.000Z	25 \| good	3.283 \| good	14.36 \| good	27.189 \| good	0.412 \| good	8.724 \| good	0.265 \| good
2026-07-23T16:00:00.000Z	27 \| good	3.282 \| good	14.36 \| good	29.204 \| good	0.173 \| good	7.607 \| good	0.265 \| good
2026-07-23T17:00:00.000Z	30 \| good	3.567 \| good	16.262 \| good	32.222 \| good	0.181 \| good	6.145 \| good	0.225 \| good
2026-07-23T18:00:00.000Z	32 \| good	3.567 \| good	16.245 \| good	35.297 \| good	0.335 \| good	5.004 \| good	0.249 \| good
2026-07-23T19:00:00.000Z	35 \| good	3.569 \| good	16.264 \| good	38.35 \| good	0.35 \| good	4.153 \| good	0.254 \| good
2026-07-23T20:00:00.000Z	38 \| good	3.676 \| good	16.318 \| good	41.364 \| good	0.181 \| good	2.731 \| good	0.254 \| good
2026-07-23T21:00:00.000Z	39 \| good	3.686 \| good	16.371 \| good	42.402 \| good	0.188 \| good	4.097 \| good	0.254 \| good
2026-07-23T22:00:00.000Z	39 \| good	3.686 \| good	16.371 \| good	42.402 \| good	0.188 \| good	4.097 \| good	0.254 \| good
2026-07-23T23:00:00.000Z	60 \| moderate	14.104 \| fine	63.308 \| fine	48.243 \| good	0.529 \| good	1.975 \| good	0.143 \| good
2026-07-24T00:00:00.000Z	52 \| moderate	9.763 \| good	43.613 \| good	39.256 \| good	0.517 \| good	4.868 \| good	0.164 \| good
2026-07-24T01:00:00.000Z	54 \| moderate	11.072 \| good	49.104 \| good	31.976 \| good	0.489 \| good	7.275 \| good	0.179 \| good
2026-07-24T02:00:00.000Z	49 \| good	9.445 \| good	42.323 \| good	29.628 \| good	0.468 \| good	7.963 \| good	0.183 \| good
2026-07-24T03:00:00.000Z	49 \| good	9.448 \| good	42.085 \| good	26.446 \| good	0.462 \| good	9.383 \| good	0.189 \| good
2026-07-24T04:00:00.000Z	52 \| moderate	9.79 \| good	43.504 \| good	26.068 \| good	0.458 \| good	11.279 \| good	0.199 \| good
2026-07-24T05:00:00.000Z	49 \| good	8.548 \| good	37.574 \| good	19.075 \| good	0.441 \| good	12.333 \| good	0.207 \| good
2026-07-24T06:00:00.000Z	52 \| moderate	9.607 \| good	42.804 \| good	15.815 \| good	0.424 \| good	13.04 \| good	0.209 \| good
2026-07-24T07:00:00.000Z	54 \| moderate	10.636 \| good	47.263 \| good	11.909 \| good	0.413 \| good	13.536 \| good	0.209 \| good
2026-07-24T08:00:00.000Z	49 \| good	9.166 \| good	40.689 \| good	10.721 \| good	0.409 \| good	14.098 \| good	0.209 \| good
2026-07-24T09:00:00.000Z	44 \| good	7.836 \| good	34.418 \| good	12.797 \| good	0.406 \| good	14.926 \| good	0.211 \| good
2026-07-24T10:00:00.000Z	44 \| good	8.071 \| good	35.391 \| good	14.222 \| good	0.402 \| good	15.99 \| good	0.219 \| good
2026-07-24T11:00:00.000Z	27 \| good	4.826 \| good	20.736 \| good	17.243 \| good	0.387 \| good	14.317 \| good	0.228 \| good
2026-07-24T12:00:00.000Z	21 \| good	2.906 \| good	12.064 \| good	22.674 \| good	0.477 \| good	11.274 \| good	0.219 \| good
2026-07-24T13:00:00.000Z	33 \| good	6.273 \| good	27.714 \| good	26.714 \| good	0.706 \| good	6.058 \| good	0.175 \| good
2026-07-24T14:00:00.000Z	38 \| good	6.984 \| good	30.806 \| good	28.057 \| good	0.751 \| good	3.142 \| good	0.156 \| good
2026-07-24T15:00:00.000Z	38 \| good	6.74 \| good	29.803 \| good	34.734 \| good	0.703 \| good	1.697 \| good	0.149 \| good
2026-07-24T16:00:00.000Z	44 \| good	7.794 \| good	34.291 \| good	42.295 \| good	0.646 \| good	1.198 \| good	0.148 \| good
2026-07-24T17:00:00.000Z	49 \| good	8.651 \| good	38.131 \| good	44.623 \| good	0.615 \| good	1.047 \| good	0.149 \| good
2026-07-24T18:00:00.000Z	52 \| moderate	10.027 \| good	44.758 \| good	45.915 \| good	0.599 \| good	1.035 \| good	0.15 \| good
2026-07-24T19:00:00.000Z	41 \| good	3.071 \| good	12.679 \| good	43.779 \| good	0.587 \| good	1.082 \| good	0.151 \| good
2026-07-24T20:00:00.000Z	39 \| good	4.028 \| good	17.628 \| good	41.887 \| good	0.572 \| good	1.138 \| good	0.152 \| good
2026-07-24T21:00:00.000Z	39 \| good	5.318 \| good	22.991 \| good	41.774 \| good	0.553 \| good	1.254 \| good	0.153 \| good
2026-07-24T22:00:00.000Z	38 \| good	4.142 \| good	18.23 \| good	41.145 \| good	0.53 \| good	1.541 \| good	0.154 \| good
2026-07-24T23:00:00.000Z	34 \| good	6.107 \| good	27.275 \| good	37.238 \| good	0.499 \| good	2.197 \| good	0.157 \| good
2026-07-25T00:00:00.000Z	38 \| good	7.374 \| good	32.549 \| good	31.859 \| good	0.462 \| good	3.422 \| good	0.161 \| good
2026-07-25T01:00:00.000Z	44 \| good	7.99 \| good	34.967 \| good	23.742 \| good	0.417 \| good	4.043 \| good	0.158 \| good
2026-07-25T02:00:00.000Z	54 \| moderate	10.516 \| good	46.539 \| good	20.701 \| good	0.375 \| good	4.766 \| good	0.154 \| good
2026-07-25T03:00:00.000Z	52 \| moderate	9.831 \| good	43.652 \| good	18.391 \| good	0.366 \| good	5.492 \| good	0.15 \| good
2026-07-25T04:00:00.000Z	44 \| good	8.036 \| good	35.273 \| good	14.454 \| good	0.368 \| good	7.147 \| good	0.154 \| good
2026-07-25T05:00:00.000Z	27 \| good	5.426 \| good	23.581 \| good	12.717 \| good	0.379 \| good	8.535 \| good	0.16 \| good
2026-07-25T06:00:00.000Z	14 \| good	1.46 \| good	5.865 \| good	14.537 \| good	0.402 \| good	10.637 \| good	0.168 \| good
2026-07-25T07:00:00.000Z	14 \| good	1.232 \| good	4.766 \| good	14.745 \| good	0.444 \| good	12.665 \| good	0.176 \| good
2026-07-25T08:00:00.000Z	14 \| good	0.831 \| good	2.863 \| good	14.519 \| good	0.497 \| good	12.768 \| good	0.177 \| good
2026-07-25T09:00:00.000Z	12 \| good	1.263 \| good	5.078 \| good	10.05 \| good	0.55 \| good	13.35 \| good	0.181 \| good
2026-07-25T10:00:00.000Z	13 \| good	1.12 \| good	4.55 \| good	11.383 \| good	0.597 \| good	14.041 \| good	0.186 \| good
2026-07-25T11:00:00.000Z	12 \| good	1.006 \| good	4.101 \| good	12.046 \| good	0.637 \| good	13.405 \| good	0.193 \| good
2026-07-25T12:00:00.000Z	13 \| good	0.409 \| good	1.325 \| good	13.796 \| good	0.707 \| good	9.249 \| good	0.179 \| good
2026-07-25T13:00:00.000Z	15 \| good	0.549 \| good	1.905 \| good	16.398 \| good	0.83 \| good	4.726 \| good	0.15 \| good
2026-07-25T14:00:00.000Z	22 \| good	1.031 \| good	4.19 \| good	24.413 \| good	0.739 \| good	2.551 \| good	0.141 \| good
2026-07-25T15:00:00.000Z	29 \| good	1.561 \| good	6.478 \| good	31.319 \| good	0.597 \| good	1.513 \| good	0.142 \| good
2026-07-25T16:00:00.000Z	35 \| good	3.782 \| good	16.553 \| good	38.435 \| good	0.46 \| good	1.022 \| good	0.144 \| good
2026-07-25T17:00:00.000Z	38 \| good	4.486 \| good	19.481 \| good	40.658 \| good	0.398 \| good	0.862 \| good	0.144 \| good
2026-07-25T18:00:00.000Z	42 \| good	5.841 \| good	25.587 \| good	44.801 \| good	0.362 \| good	0.8 \| good	0.143 \| good
2026-07-25T19:00:00.000Z	47 \| good	6.815 \| good	30.195 \| good	51.066 \| good	0.345 \| good	0.797 \| good	0.143 \| good
2026-07-25T20:00:00.000Z	49 \| good	6.269 \| good	27.857 \| good	53.097 \| good	0.336 \| good	0.813 \| good	0.142 \| good
2026-07-25T21:00:00.000Z	48 \| good	6.763 \| good	30.093 \| good	52.249 \| good	0.333 \| good	0.885 \| good	0.141 \| good
2026-07-25T22:00:00.000Z	46 \| good	7.097 \| good	31.519 \| good	49.917 \| good	0.335 \| good	1.094 \| good	0.142 \| good

Norristown

Empower business decisions with accurate air quality data

Norristown, Pennsylvania air quality map: Real-time AQI near you

0.25ppm

How accurate is Pennsylvania, USA air quality data?

Air quality measurements for Pennsylvania, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.

Source: Ambee Data Sources

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Frequently asked questions

How frequently is the air quality data for Norristown, Pennsylvania updated?

Air quality data for Norristown, Pennsylvania is updated on an hourly basis.

When did Norristown, Pennsylvania experience the worst air quality in the last 24 hours?

The worst air quality in Norristown, Pennsylvania was recorded at 10:00:00 on 2026-07-22.

When did Norristown, Pennsylvania have its best air quality in the last 24 hours?

The best air quality in Norristown, Pennsylvania was recorded at 10:00:00 on 2026-07-23.

What is the real-time air quality index for Norristown, Pennsylvania?

The real-time air quality index in Norristown, Pennsylvania is 39, currently categorized as Good.

Which pollutant is found most often in Norristown, Pennsylvania?

The most common pollutant in Norristown, Pennsylvania is O3.

What can I do if the air quality in Norristown, Pennsylvania is poor?

If the air quality in Norristown, Pennsylvania is poor, limit outdoor activities and use a mask to safeguard your health.

What are the current PM_2.5 levels in Norristown, Pennsylvania?

The measured PM_2.5 levels in Norristown, Pennsylvania at present are 3.686 μg/m³.

What are the current PM₁₀ levels at Norristown, Pennsylvania?

The current PM₁₀ levels in Norristown, Pennsylvania are 16.371 μg/m³.

What are the current carbon monoxide (CO) levels at Norristown, Pennsylvania?

The current carbon monoxide (CO) level in Norristown, Pennsylvania is 0.254 ppm.

What are the current sulfur dioxide (SO₂) levels at Norristown, Pennsylvania?

The current sulfur dioxide (SO₂) levels in Norristown, Pennsylvania are 0.188 ppb.

What are the current ozone (O₃) levels at Norristown, Pennsylvania?

The current ozone (O₃) levels at Norristown, Pennsylvania is 42.402 ppm.

What are the current nitrogen dioxide (NO₂) levels at Norristown, Pennsylvania?

The current nitrogen dioxide (NO₂) levels at Norristown, Pennsylvania is 4.097 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-07-21T23:00:00.000Z	44 \| good	8.14 \| good	35.658 \| good	31.353 \| good	0.343 \| good	9.101 \| good	0.416 \| good
2026-07-22T00:00:00.000Z	44 \| good	7.888 \| good	34.423 \| good	30.214 \| good	0.368 \| good	7.802 \| good	0.4 \| good
2026-07-22T01:00:00.000Z	33 \| good	6.354 \| good	28.677 \| good	27.34 \| good	0.372 \| good	8.722 \| good	0.454 \| good
2026-07-22T02:00:00.000Z	27 \| good	5.131 \| good	22.592 \| good	26.469 \| good	0.367 \| good	6.902 \| good	0.37 \| good
2026-07-22T03:00:00.000Z	27 \| good	4.618 \| good	20.523 \| good	25.413 \| good	0.388 \| good	9.128 \| good	0.367 \| good
2026-07-22T04:00:00.000Z	26 \| good	4.438 \| good	19.618 \| good	28.252 \| good	0.388 \| good	10.534 \| good	0.367 \| good
2026-07-22T05:00:00.000Z	27 \| good	4.612 \| good	20.487 \| good	27.285 \| good	0.414 \| good	9.82 \| good	0.351 \| good
2026-07-22T06:00:00.000Z	27 \| good	4.606 \| good	20.462 \| good	26.294 \| good	0.486 \| good	5.436 \| good	0.335 \| good
2026-07-22T07:00:00.000Z	27 \| good	4.584 \| good	20.366 \| good	26.314 \| good	0.486 \| good	5.857 \| good	0.335 \| good
2026-07-22T08:00:00.000Z	27 \| good	4.566 \| good	20.286 \| good	24.31 \| good	0.383 \| good	5.11 \| good	0.276 \| good
2026-07-22T09:00:00.000Z	27 \| good	4.754 \| good	21.223 \| good	24.249 \| good	0.388 \| good	6.714 \| good	0.3 \| good
2026-07-22T10:00:00.000Z	27 \| good	4.845 \| good	21.214 \| good	24.139 \| good	0.493 \| good	11.02 \| good	0.3 \| good
2026-07-22T11:00:00.000Z	27 \| good	4.842 \| good	21.188 \| good	23.135 \| good	0.493 \| good	7.566 \| good	0.351 \| good
2026-07-22T12:00:00.000Z	27 \| good	4.754 \| good	21.225 \| good	23.034 \| good	0.601 \| good	9.158 \| good	0.428 \| good
2026-07-22T13:00:00.000Z	27 \| good	4.756 \| good	21.251 \| good	23.089 \| good	0.56 \| good	15.223 \| good	0.428 \| good
2026-07-22T14:00:00.000Z	27 \| good	5.451 \| good	23.267 \| good	25.061 \| good	0.551 \| good	10.894 \| good	0.396 \| good
2026-07-22T15:00:00.000Z	38 \| good	6.714 \| good	30.056 \| good	28.015 \| good	0.543 \| good	10.083 \| good	0.396 \| good
2026-07-22T16:00:00.000Z	44 \| good	8.135 \| good	36.169 \| good	31.162 \| good	0.436 \| good	8.65 \| good	0.396 \| good
2026-07-22T17:00:00.000Z	49 \| good	8.976 \| good	39.378 \| good	34.221 \| good	0.409 \| good	7.905 \| good	0.396 \| good
2026-07-22T18:00:00.000Z	49 \| good	9.427 \| good	42.556 \| good	38.195 \| good	0.452 \| good	7.155 \| good	0.375 \| good
2026-07-22T19:00:00.000Z	52 \| moderate	9.566 \| good	42.749 \| good	40.321 \| good	0.451 \| good	7.39 \| good	0.375 \| good
2026-07-22T20:00:00.000Z	49 \| good	9.488 \| good	42.837 \| good	45.245 \| good	0.425 \| good	7.293 \| good	0.375 \| good
2026-07-22T21:00:00.000Z	49 \| good	9.287 \| good	41.821 \| good	42.318 \| good	0.419 \| good	9.582 \| good	0.375 \| good
2026-07-22T22:00:00.000Z	49 \| good	8.691 \| good	37.945 \| good	41.465 \| good	0.364 \| good	7.669 \| good	0.333 \| good
2026-07-22T23:00:00.000Z	44 \| good	8.089 \| good	35.867 \| good	40.376 \| good	0.483 \| good	6.866 \| good	0.357 \| good
2026-07-23T00:00:00.000Z	44 \| good	7.965 \| good	34.778 \| good	36.496 \| good	0.453 \| good	10.092 \| good	0.34 \| good
2026-07-23T01:00:00.000Z	44 \| good	7.76 \| good	34.725 \| good	31.504 \| good	0.391 \| good	8.746 \| good	0.341 \| good
2026-07-23T02:00:00.000Z	38 \| good	7.186 \| good	31.84 \| good	30.565 \| good	0.385 \| good	6.115 \| good	0.316 \| good
2026-07-23T03:00:00.000Z	18 \| good	0.645 \| good	2.412 \| good	19.36 \| good	0.648 \| good	6.921 \| good	0.202 \| good
2026-07-23T04:00:00.000Z	33 \| good	5.96 \| good	25.746 \| good	30.218 \| good	0.375 \| good	5.739 \| good	0.261 \| good
2026-07-23T05:00:00.000Z	27 \| good	5.249 \| good	22.702 \| good	26.362 \| good	0.375 \| good	5.458 \| good	0.261 \| good
2026-07-23T06:00:00.000Z	27 \| good	4.633 \| good	20.578 \| good	23.399 \| good	0.38 \| good	4.925 \| good	0.245 \| good
2026-07-23T07:00:00.000Z	22 \| good	4.122 \| good	18.517 \| good	23.341 \| good	0.411 \| good	4.198 \| good	0.245 \| good
2026-07-23T08:00:00.000Z	22 \| good	3.611 \| good	16.482 \| good	22.259 \| good	0.372 \| good	4.407 \| good	0.245 \| good
2026-07-23T09:00:00.000Z	19 \| good	3.394 \| good	15.402 \| good	20.366 \| good	0.465 \| good	5.286 \| good	0.245 \| good
2026-07-23T10:00:00.000Z	18 \| good	3.279 \| good	14.341 \| good	19.382 \| good	0.465 \| good	8.693 \| good	0.249 \| good
2026-07-23T11:00:00.000Z	19 \| good	3.272 \| good	14.306 \| good	20.229 \| good	0.484 \| good	11.575 \| good	0.298 \| good
2026-07-23T12:00:00.000Z	19 \| good	3.272 \| good	14.307 \| good	20.114 \| good	0.398 \| good	14.06 \| good	0.343 \| good
2026-07-23T13:00:00.000Z	19 \| good	3.279 \| good	14.351 \| good	21.218 \| good	0.527 \| good	12.618 \| good	0.31 \| good
2026-07-23T14:00:00.000Z	27 \| good	4.541 \| good	18.357 \| good	22.312 \| good	0.507 \| good	10.435 \| good	0.27 \| good
2026-07-23T15:00:00.000Z	25 \| good	3.283 \| good	14.36 \| good	27.189 \| good	0.412 \| good	8.724 \| good	0.265 \| good
2026-07-23T16:00:00.000Z	27 \| good	3.282 \| good	14.36 \| good	29.204 \| good	0.173 \| good	7.607 \| good	0.265 \| good
2026-07-23T17:00:00.000Z	30 \| good	3.567 \| good	16.262 \| good	32.222 \| good	0.181 \| good	6.145 \| good	0.225 \| good
2026-07-23T18:00:00.000Z	32 \| good	3.567 \| good	16.245 \| good	35.297 \| good	0.335 \| good	5.004 \| good	0.249 \| good
2026-07-23T19:00:00.000Z	35 \| good	3.569 \| good	16.264 \| good	38.35 \| good	0.35 \| good	4.153 \| good	0.254 \| good
2026-07-23T20:00:00.000Z	38 \| good	3.676 \| good	16.318 \| good	41.364 \| good	0.181 \| good	2.731 \| good	0.254 \| good
2026-07-23T21:00:00.000Z	39 \| good	3.686 \| good	16.371 \| good	42.402 \| good	0.188 \| good	4.097 \| good	0.254 \| good
2026-07-23T22:00:00.000Z	39 \| good	3.686 \| good	16.371 \| good	42.402 \| good	0.188 \| good	4.097 \| good	0.254 \| good
2026-07-23T23:00:00.000Z	60 \| moderate	14.104 \| fine	63.308 \| fine	48.243 \| good	0.529 \| good	1.975 \| good	0.143 \| good
2026-07-24T00:00:00.000Z	52 \| moderate	9.763 \| good	43.613 \| good	39.256 \| good	0.517 \| good	4.868 \| good	0.164 \| good
2026-07-24T01:00:00.000Z	54 \| moderate	11.072 \| good	49.104 \| good	31.976 \| good	0.489 \| good	7.275 \| good	0.179 \| good
2026-07-24T02:00:00.000Z	49 \| good	9.445 \| good	42.323 \| good	29.628 \| good	0.468 \| good	7.963 \| good	0.183 \| good
2026-07-24T03:00:00.000Z	49 \| good	9.448 \| good	42.085 \| good	26.446 \| good	0.462 \| good	9.383 \| good	0.189 \| good
2026-07-24T04:00:00.000Z	52 \| moderate	9.79 \| good	43.504 \| good	26.068 \| good	0.458 \| good	11.279 \| good	0.199 \| good
2026-07-24T05:00:00.000Z	49 \| good	8.548 \| good	37.574 \| good	19.075 \| good	0.441 \| good	12.333 \| good	0.207 \| good
2026-07-24T06:00:00.000Z	52 \| moderate	9.607 \| good	42.804 \| good	15.815 \| good	0.424 \| good	13.04 \| good	0.209 \| good
2026-07-24T07:00:00.000Z	54 \| moderate	10.636 \| good	47.263 \| good	11.909 \| good	0.413 \| good	13.536 \| good	0.209 \| good
2026-07-24T08:00:00.000Z	49 \| good	9.166 \| good	40.689 \| good	10.721 \| good	0.409 \| good	14.098 \| good	0.209 \| good
2026-07-24T09:00:00.000Z	44 \| good	7.836 \| good	34.418 \| good	12.797 \| good	0.406 \| good	14.926 \| good	0.211 \| good
2026-07-24T10:00:00.000Z	44 \| good	8.071 \| good	35.391 \| good	14.222 \| good	0.402 \| good	15.99 \| good	0.219 \| good
2026-07-24T11:00:00.000Z	27 \| good	4.826 \| good	20.736 \| good	17.243 \| good	0.387 \| good	14.317 \| good	0.228 \| good
2026-07-24T12:00:00.000Z	21 \| good	2.906 \| good	12.064 \| good	22.674 \| good	0.477 \| good	11.274 \| good	0.219 \| good
2026-07-24T13:00:00.000Z	33 \| good	6.273 \| good	27.714 \| good	26.714 \| good	0.706 \| good	6.058 \| good	0.175 \| good
2026-07-24T14:00:00.000Z	38 \| good	6.984 \| good	30.806 \| good	28.057 \| good	0.751 \| good	3.142 \| good	0.156 \| good
2026-07-24T15:00:00.000Z	38 \| good	6.74 \| good	29.803 \| good	34.734 \| good	0.703 \| good	1.697 \| good	0.149 \| good
2026-07-24T16:00:00.000Z	44 \| good	7.794 \| good	34.291 \| good	42.295 \| good	0.646 \| good	1.198 \| good	0.148 \| good
2026-07-24T17:00:00.000Z	49 \| good	8.651 \| good	38.131 \| good	44.623 \| good	0.615 \| good	1.047 \| good	0.149 \| good
2026-07-24T18:00:00.000Z	52 \| moderate	10.027 \| good	44.758 \| good	45.915 \| good	0.599 \| good	1.035 \| good	0.15 \| good
2026-07-24T19:00:00.000Z	41 \| good	3.071 \| good	12.679 \| good	43.779 \| good	0.587 \| good	1.082 \| good	0.151 \| good
2026-07-24T20:00:00.000Z	39 \| good	4.028 \| good	17.628 \| good	41.887 \| good	0.572 \| good	1.138 \| good	0.152 \| good
2026-07-24T21:00:00.000Z	39 \| good	5.318 \| good	22.991 \| good	41.774 \| good	0.553 \| good	1.254 \| good	0.153 \| good
2026-07-24T22:00:00.000Z	38 \| good	4.142 \| good	18.23 \| good	41.145 \| good	0.53 \| good	1.541 \| good	0.154 \| good
2026-07-24T23:00:00.000Z	34 \| good	6.107 \| good	27.275 \| good	37.238 \| good	0.499 \| good	2.197 \| good	0.157 \| good
2026-07-25T00:00:00.000Z	38 \| good	7.374 \| good	32.549 \| good	31.859 \| good	0.462 \| good	3.422 \| good	0.161 \| good
2026-07-25T01:00:00.000Z	44 \| good	7.99 \| good	34.967 \| good	23.742 \| good	0.417 \| good	4.043 \| good	0.158 \| good
2026-07-25T02:00:00.000Z	54 \| moderate	10.516 \| good	46.539 \| good	20.701 \| good	0.375 \| good	4.766 \| good	0.154 \| good
2026-07-25T03:00:00.000Z	52 \| moderate	9.831 \| good	43.652 \| good	18.391 \| good	0.366 \| good	5.492 \| good	0.15 \| good
2026-07-25T04:00:00.000Z	44 \| good	8.036 \| good	35.273 \| good	14.454 \| good	0.368 \| good	7.147 \| good	0.154 \| good
2026-07-25T05:00:00.000Z	27 \| good	5.426 \| good	23.581 \| good	12.717 \| good	0.379 \| good	8.535 \| good	0.16 \| good
2026-07-25T06:00:00.000Z	14 \| good	1.46 \| good	5.865 \| good	14.537 \| good	0.402 \| good	10.637 \| good	0.168 \| good
2026-07-25T07:00:00.000Z	14 \| good	1.232 \| good	4.766 \| good	14.745 \| good	0.444 \| good	12.665 \| good	0.176 \| good
2026-07-25T08:00:00.000Z	14 \| good	0.831 \| good	2.863 \| good	14.519 \| good	0.497 \| good	12.768 \| good	0.177 \| good
2026-07-25T09:00:00.000Z	12 \| good	1.263 \| good	5.078 \| good	10.05 \| good	0.55 \| good	13.35 \| good	0.181 \| good
2026-07-25T10:00:00.000Z	13 \| good	1.12 \| good	4.55 \| good	11.383 \| good	0.597 \| good	14.041 \| good	0.186 \| good
2026-07-25T11:00:00.000Z	12 \| good	1.006 \| good	4.101 \| good	12.046 \| good	0.637 \| good	13.405 \| good	0.193 \| good
2026-07-25T12:00:00.000Z	13 \| good	0.409 \| good	1.325 \| good	13.796 \| good	0.707 \| good	9.249 \| good	0.179 \| good
2026-07-25T13:00:00.000Z	15 \| good	0.549 \| good	1.905 \| good	16.398 \| good	0.83 \| good	4.726 \| good	0.15 \| good
2026-07-25T14:00:00.000Z	22 \| good	1.031 \| good	4.19 \| good	24.413 \| good	0.739 \| good	2.551 \| good	0.141 \| good
2026-07-25T15:00:00.000Z	29 \| good	1.561 \| good	6.478 \| good	31.319 \| good	0.597 \| good	1.513 \| good	0.142 \| good
2026-07-25T16:00:00.000Z	35 \| good	3.782 \| good	16.553 \| good	38.435 \| good	0.46 \| good	1.022 \| good	0.144 \| good
2026-07-25T17:00:00.000Z	38 \| good	4.486 \| good	19.481 \| good	40.658 \| good	0.398 \| good	0.862 \| good	0.144 \| good
2026-07-25T18:00:00.000Z	42 \| good	5.841 \| good	25.587 \| good	44.801 \| good	0.362 \| good	0.8 \| good	0.143 \| good
2026-07-25T19:00:00.000Z	47 \| good	6.815 \| good	30.195 \| good	51.066 \| good	0.345 \| good	0.797 \| good	0.143 \| good
2026-07-25T20:00:00.000Z	49 \| good	6.269 \| good	27.857 \| good	53.097 \| good	0.336 \| good	0.813 \| good	0.142 \| good
2026-07-25T21:00:00.000Z	48 \| good	6.763 \| good	30.093 \| good	52.249 \| good	0.333 \| good	0.885 \| good	0.141 \| good
2026-07-25T22:00:00.000Z	46 \| good	7.097 \| good	31.519 \| good	49.917 \| good	0.335 \| good	1.094 \| good	0.142 \| good

Real-time air quality index in Norristown, Pennsylvania today

Common air pollutants in Norristown, Pennsylvania

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

Track live Norristown, Pennsylvania air quality forecast and history

Empower business decisions with accurate air quality data

Norristown, Pennsylvania air quality map: Real-time AQI near you

Air quality in nearby cities

East Norriton, Pennsylvania

Plymouth Township, Pennsylvania

West Norriton, Pennsylvania

Upper Merion, Pennsylvania

Whitpain, Pennsylvania

Lower Providence, Pennsylvania

How accurate is Pennsylvania, USA air quality data?

Air quality levels in US

Frequently asked questions

How frequently is the air quality data for Norristown, Pennsylvania updated?

When did Norristown, Pennsylvania experience the worst air quality in the last 24 hours?

When did Norristown, Pennsylvania have its best air quality in the last 24 hours?

What is the real-time air quality index for Norristown, Pennsylvania?

Which pollutant is found most often in Norristown, Pennsylvania?

What can I do if the air quality in Norristown, Pennsylvania is poor?

What are the current PM2.5 levels in Norristown, Pennsylvania?

What are the current PM10 levels at Norristown, Pennsylvania?

What are the current carbon monoxide (CO) levels at Norristown, Pennsylvania?

What are the current sulfur dioxide (SO2) levels at Norristown, Pennsylvania?

What are the current ozone (O3) levels at Norristown, Pennsylvania?

What are the current nitrogen dioxide (NO2) levels at Norristown, Pennsylvania?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What are the current PM_2.5 levels in Norristown, Pennsylvania?

What are the current PM₁₀ levels at Norristown, Pennsylvania?

What are the current sulfur dioxide (SO₂) levels at Norristown, Pennsylvania?

What are the current ozone (O₃) levels at Norristown, Pennsylvania?

What are the current nitrogen dioxide (NO₂) levels at Norristown, Pennsylvania?