What is the sulfur dioxide (SO2) level in Merrimack, New Hampshire at the moment?

Currently, Merrimack, New Hampshire has a sulfur dioxide (SO2) concentration of 0.633 ppb.

What is the ozone (O3) level in Merrimack, New Hampshire at the moment?

The current ozone (O3) level in Merrimack, New Hampshire at the moment is 33.644 ppm.

What is the nitrogen dioxide (NO2) level in Merrimack, New Hampshire at the moment?

Nitrogen dioxide (NO2) level in Merrimack, New Hampshire at the moment is 19.879 ppb.

Live air quality index in Merrimack, New Hampshire today

Q: What is the PM2.5 level in Merrimack, New Hampshire at the moment?

PM2.5 levels in Merrimack, New Hampshire are currently 4.876 μg/m3.

Q: What is the PM10 level in Merrimack, New Hampshire at the moment?

The PM10 concentration in Merrimack, New Hampshire is 20.09 μg/m3 at the moment.

Stay updated with real-time air quality in Merrimack, New Hampshire 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

Merrimack, New Hampshire

Last updated: ... (Local time)

Major air pollutants in Merrimack, New Hampshire

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)

20.09 μg/m³

155

255

425

605+

Ozone (O₃)

33.64 ppb

201

201+

Sulfur Dioxide (SO₂)

0.63 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

19.88 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.21 ppm

4.5

9.5

12.5

230.5

50.5+

Pollen Level

Low

Merrimack, New Hampshire

Get Live Pollen Counts

Merrimack, New Hampshire

Scroll To Air Quality Map

Track live Merrimack, New Hampshire air quality forecast and history

Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	29 \| good	4.907 \| good	16.545 \| good	30.577 \| good	0.55 \| good	16.034 \| good	0.248 \| good
2025-12-27T01:00:00.000Z	38 \| good	6.678 \| good	29.748 \| good	28.754 \| good	0.517 \| good	13.99 \| good	0.316 \| good
2025-12-27T02:00:00.000Z	44 \| good	8.34 \| good	43.009 \| good	23.77 \| good	0.538 \| good	18.573 \| good	0.301 \| good
2025-12-27T03:00:00.000Z	38 \| good	7.241 \| good	25.723 \| good	24.499 \| good	0.497 \| good	10.809 \| good	0.301 \| good
2025-12-27T04:00:00.000Z	38 \| good	6.979 \| good	19.774 \| good	24.434 \| good	0.517 \| good	9.518 \| good	0.301 \| good
2025-12-27T05:00:00.000Z	49 \| good	8.501 \| good	20.583 \| good	24.911 \| good	0.536 \| good	7.843 \| good	0.216 \| good
2025-12-27T06:00:00.000Z	38 \| good	6.867 \| good	25.233 \| good	27.457 \| good	0.556 \| good	6.995 \| good	0.212 \| good
2025-12-27T07:00:00.000Z	33 \| good	6.356 \| good	17.66 \| good	26.949 \| good	0.564 \| good	6.128 \| good	0.212 \| good
2025-12-27T08:00:00.000Z	33 \| good	5.687 \| good	21.305 \| good	28.61 \| good	0.531 \| good	4.169 \| good	0.212 \| good
2025-12-27T09:00:00.000Z	27 \| good	3.951 \| good	10.441 \| good	28.8 \| good	0.571 \| good	5.269 \| good	0.2 \| good
2025-12-27T10:00:00.000Z	29 \| good	3.442 \| good	7.416 \| good	30.631 \| good	0.504 \| good	3.939 \| good	0.215 \| good
2025-12-27T11:00:00.000Z	29 \| good	3.159 \| good	10.937 \| good	30.692 \| good	0.502 \| good	3.161 \| good	0.2 \| good
2025-12-27T12:00:00.000Z	29 \| good	2.806 \| good	10.119 \| good	30.652 \| good	0.503 \| good	3.118 \| good	0.2 \| good
2025-12-27T13:00:00.000Z	30 \| good	2.773 \| good	13.158 \| good	31.823 \| good	0.502 \| good	2.763 \| good	0.2 \| good
2025-12-27T14:00:00.000Z	30 \| good	2.845 \| good	17.23 \| good	32.242 \| good	0.478 \| good	2.632 \| good	0.242 \| good
2025-12-27T15:00:00.000Z	31 \| good	2.739 \| good	10.694 \| good	32.525 \| good	0.499 \| good	3.211 \| good	0.242 \| good
2025-12-27T16:00:00.000Z	31 \| good	2.717 \| good	9.154 \| good	33.382 \| good	0.509 \| good	2.482 \| good	0.212 \| good
2025-12-27T17:00:00.000Z	32 \| good	2.791 \| good	12.673 \| good	35.072 \| good	0.507 \| good	3.062 \| good	0.227 \| good
2025-12-27T18:00:00.000Z	31 \| good	2.895 \| good	10.756 \| good	33.695 \| good	0.533 \| good	3.293 \| good	0.212 \| good
2025-12-27T19:00:00.000Z	32 \| good	3.269 \| good	10.98 \| good	35.371 \| good	0.548 \| good	4.136 \| good	0.212 \| good
2025-12-27T20:00:00.000Z	31 \| good	2.848 \| good	10.485 \| good	34.042 \| good	0.525 \| good	5.096 \| good	0.212 \| good
2025-12-27T21:00:00.000Z	33 \| good	2.973 \| good	11.926 \| good	35.645 \| good	0.472 \| good	6.594 \| good	0.239 \| good
2025-12-27T22:00:00.000Z	32 \| good	2.868 \| good	4.871 \| good	34.836 \| good	0.474 \| good	10.2 \| good	0.266 \| good
2025-12-27T23:00:00.000Z	31 \| good	3.514 \| good	19.026 \| good	34.333 \| good	0.476 \| good	17.745 \| good	0.272 \| good
2025-12-28T00:00:00.000Z	30 \| good	4.897 \| good	21.297 \| good	32.418 \| good	0.506 \| good	14.882 \| good	0.312 \| good
2025-12-28T01:00:00.000Z	30 \| good	5.342 \| good	23.561 \| good	31.977 \| good	0.496 \| good	18.158 \| good	0.371 \| good
2025-12-28T02:00:00.000Z	28 \| good	3.758 \| good	14.587 \| good	30.3 \| good	0.576 \| good	17.168 \| good	0.42 \| good
2025-12-28T03:00:00.000Z	33 \| good	5.912 \| good	25.902 \| good	25.846 \| good	0.358 \| good	4.87 \| good	0.172 \| good
2025-12-28T04:00:00.000Z	33 \| good	6.316 \| good	13.867 \| good	32.276 \| good	0.514 \| good	11.67 \| good	0.359 \| good
2025-12-28T05:00:00.000Z	44 \| good	8.181 \| good	19.7 \| good	31.298 \| good	0.496 \| good	13.207 \| good	0.35 \| good
2025-12-28T06:00:00.000Z	49 \| good	9.054 \| good	16.591 \| good	27.555 \| good	0.496 \| good	12.443 \| good	0.344 \| good
2025-12-28T07:00:00.000Z	52 \| moderate	10.317 \| good	15.374 \| good	20.782 \| good	0.496 \| good	14.57 \| good	0.327 \| good
2025-12-28T08:00:00.000Z	54 \| moderate	10.558 \| good	24.157 \| good	26.286 \| good	0.519 \| good	12.647 \| good	0.257 \| good
2025-12-28T09:00:00.000Z	52 \| moderate	9.846 \| good	39.304 \| good	25.404 \| good	0.547 \| good	16.718 \| good	0.307 \| good
2025-12-28T10:00:00.000Z	44 \| good	7.971 \| good	25.669 \| good	27.348 \| good	0.598 \| good	19.384 \| good	0.316 \| good
2025-12-28T11:00:00.000Z	30 \| good	3.004 \| good	12.928 \| good	32.491 \| good	0.554 \| good	15.757 \| good	0.316 \| good
2025-12-28T12:00:00.000Z	54 \| moderate	11.223 \| good	31.706 \| good	18.215 \| good	0.568 \| good	14.909 \| good	0.31 \| good
2025-12-28T13:00:00.000Z	54 \| moderate	11.344 \| good	31.569 \| good	19.255 \| good	0.563 \| good	14.329 \| good	0.403 \| good
2025-12-28T14:00:00.000Z	62 \| moderate	14.874 \| fine	38.516 \| good	19.887 \| good	0.61 \| good	16.223 \| good	0.295 \| good
2025-12-28T15:00:00.000Z	44 \| good	8.39 \| good	12.028 \| good	40.567 \| good	0.519 \| good	8.034 \| good	0.228 \| good
2025-12-28T16:00:00.000Z	38 \| good	6.428 \| good	15.706 \| good	41.432 \| good	0.631 \| good	7.999 \| good	0.205 \| good
2025-12-28T17:00:00.000Z	31 \| good	5.229 \| good	22.481 \| good	33.053 \| good	0.745 \| good	6.622 \| good	0.192 \| good
2025-12-28T18:00:00.000Z	34 \| good	4.537 \| good	21.304 \| good	36.854 \| good	0.653 \| good	5.214 \| good	0.193 \| good
2025-12-28T19:00:00.000Z	36 \| good	5.877 \| good	23.101 \| good	39.401 \| good	0.685 \| good	6.931 \| good	0.193 \| good
2025-12-28T20:00:00.000Z	37 \| good	4.665 \| good	28.459 \| good	40.155 \| good	0.627 \| good	9.731 \| good	0.257 \| good
2025-12-28T21:00:00.000Z	36 \| good	3.898 \| good	15.341 \| good	38.631 \| good	0.63 \| good	9.156 \| good	0.217 \| good
2025-12-28T22:00:00.000Z	31 \| good	2.858 \| good	5.193 \| good	33.943 \| good	0.647 \| good	19.89 \| good	0.232 \| good
2025-12-28T23:00:00.000Z	31 \| good	4.876 \| good	20.09 \| good	33.644 \| good	0.633 \| good	19.879 \| good	0.207 \| good
2025-12-29T00:00:00.000Z	27 \| good	4.621 \| good	20.276 \| good	22.486 \| good	0.948 \| good	15.482 \| good	0.283 \| good
2025-12-29T01:00:00.000Z	27 \| good	5.201 \| good	22.847 \| good	22.662 \| good	1.137 \| good	14.743 \| good	0.275 \| good
2025-12-29T02:00:00.000Z	44 \| good	8.419 \| good	37.297 \| good	20.79 \| good	1.327 \| good	14.005 \| good	0.266 \| good
2025-12-29T03:00:00.000Z	52 \| moderate	10.079 \| good	44.591 \| good	22.581 \| good	1.516 \| good	13.266 \| good	0.257 \| good
2025-12-29T04:00:00.000Z	54 \| moderate	11.029 \| good	49.102 \| good	23.853 \| good	1.576 \| good	14.468 \| good	0.251 \| good
2025-12-29T05:00:00.000Z	58 \| moderate	12.565 \| fine	56.718 \| fine	19.903 \| good	1.636 \| good	15.67 \| good	0.246 \| good
2025-12-29T06:00:00.000Z	62 \| moderate	15.253 \| fine	68.265 \| fine	13.652 \| good	1.696 \| good	16.871 \| good	0.24 \| good
2025-12-29T07:00:00.000Z	66 \| moderate	16.638 \| fine	74.285 \| fine	10.223 \| good	1.317 \| good	13.963 \| good	0.219 \| good
2025-12-29T08:00:00.000Z	66 \| moderate	16.603 \| fine	73.93 \| fine	8.878 \| good	0.937 \| good	11.054 \| good	0.197 \| good
2025-12-29T09:00:00.000Z	62 \| moderate	15.14 \| fine	67.869 \| fine	9.947 \| good	0.557 \| good	8.146 \| good	0.176 \| good
2025-12-29T10:00:00.000Z	60 \| moderate	14.232 \| fine	63.975 \| fine	11.831 \| good	0.521 \| good	7.357 \| good	0.175 \| good
2025-12-29T11:00:00.000Z	60 \| moderate	13.626 \| fine	60.972 \| fine	11.222 \| good	0.485 \| good	6.568 \| good	0.173 \| good
2025-12-29T12:00:00.000Z	58 \| moderate	12.784 \| fine	57.563 \| fine	10.568 \| good	0.45 \| good	5.779 \| good	0.171 \| good
2025-12-29T13:00:00.000Z	56 \| moderate	12.246 \| fine	54.909 \| good	11.065 \| good	0.613 \| good	6.077 \| good	0.178 \| good
2025-12-29T14:00:00.000Z	56 \| moderate	12.094 \| good	53.76 \| good	12.448 \| good	0.777 \| good	6.375 \| good	0.185 \| good
2025-12-29T15:00:00.000Z	56 \| moderate	11.688 \| good	52.394 \| good	11.768 \| good	0.94 \| good	6.673 \| good	0.191 \| good
2025-12-29T16:00:00.000Z	54 \| moderate	10.797 \| good	47.603 \| good	13.179 \| good	0.976 \| good	7.271 \| good	0.195 \| good
2025-12-29T17:00:00.000Z	54 \| moderate	10.987 \| good	49.301 \| good	12.061 \| good	1.012 \| good	7.869 \| good	0.2 \| good
2025-12-29T18:00:00.000Z	49 \| good	9.234 \| good	40.934 \| good	13.754 \| good	1.047 \| good	8.467 \| good	0.204 \| good
2025-12-29T19:00:00.000Z	38 \| good	7.39 \| good	32.755 \| good	20.499 \| good	1.059 \| good	9.744 \| good	0.211 \| good
2025-12-29T20:00:00.000Z	27 \| good	4.9 \| good	21.141 \| good	27.555 \| good	1.071 \| good	11.021 \| good	0.219 \| good
2025-12-29T21:00:00.000Z	31 \| good	5.234 \| good	22.441 \| good	32.997 \| good	1.082 \| good	12.299 \| good	0.226 \| good
2025-12-29T22:00:00.000Z	30 \| good	4.987 \| good	21.517 \| good	32.121 \| good	1.046 \| good	9.858 \| good	0.211 \| good
2025-12-29T23:00:00.000Z	31 \| good	4.596 \| good	20.173 \| good	32.972 \| good	1.01 \| good	7.418 \| good	0.196 \| good
2025-12-30T00:00:00.000Z	27 \| good	4.669 \| good	20.184 \| good	25.831 \| good	0.974 \| good	4.977 \| good	0.181 \| good
2025-12-30T01:00:00.000Z	22 \| good	4.004 \| good	17.476 \| good	24.474 \| good	0.774 \| good	4.027 \| good	0.178 \| good
2025-12-30T02:00:00.000Z	21 \| good	3.447 \| good	14.692 \| good	23.025 \| good	0.573 \| good	3.077 \| good	0.175 \| good
2025-12-30T03:00:00.000Z	23 \| good	3.12 \| good	13.572 \| good	24.556 \| good	0.373 \| good	2.127 \| good	0.173 \| good
2025-12-30T04:00:00.000Z	26 \| good	1.977 \| good	7.815 \| good	27.897 \| good	0.351 \| good	1.864 \| good	0.164 \| good
2025-12-30T05:00:00.000Z	27 \| good	1.127 \| good	4.764 \| good	29.357 \| good	0.328 \| good	1.601 \| good	0.155 \| good
2025-12-30T06:00:00.000Z	29 \| good	0.582 \| good	2.039 \| good	30.848 \| good	0.306 \| good	1.338 \| good	0.147 \| good
2025-12-30T07:00:00.000Z	29 \| good	0.345 \| good	1.039 \| good	31.36 \| good	0.288 \| good	1.179 \| good	0.143 \| good
2025-12-30T08:00:00.000Z	29 \| good	0.116 \| good	0 \| good	31.09 \| good	0.271 \| good	1.021 \| good	0.14 \| good
2025-12-30T09:00:00.000Z	30 \| good	0.047 \| good	0 \| good	32.031 \| good	0.253 \| good	0.862 \| good	0.137 \| good
2025-12-30T10:00:00.000Z	30 \| good	0.302 \| good	1 \| good	32.031 \| good	0.24 \| good	1.008 \| good	0.138 \| good
2025-12-30T11:00:00.000Z	29 \| good	0.293 \| good	1 \| good	31.268 \| good	0.227 \| good	1.155 \| good	0.14 \| good
2025-12-30T12:00:00.000Z	29 \| good	0.264 \| good	1 \| good	30.895 \| good	0.213 \| good	1.301 \| good	0.141 \| good
2025-12-30T13:00:00.000Z	30 \| good	0.233 \| good	1 \| good	31.507 \| good	0.19 \| good	1.069 \| good	0.139 \| good
2025-12-30T14:00:00.000Z	30 \| good	0.15 \| good	0.137 \| good	31.51 \| good	0.167 \| good	0.837 \| good	0.136 \| good
2025-12-30T15:00:00.000Z	29 \| good	0.145 \| good	0.106 \| good	30.853 \| good	0.145 \| good	0.604 \| good	0.134 \| good
2025-12-30T16:00:00.000Z	29 \| good	0.269 \| good	0.923 \| good	31.088 \| good	0.143 \| good	0.589 \| good	0.133 \| good
2025-12-30T17:00:00.000Z	30 \| good	0.26 \| good	0.89 \| good	31.614 \| good	0.141 \| good	0.574 \| good	0.132 \| good
2025-12-30T18:00:00.000Z	28 \| good	0.112 \| good	0 \| good	30.338 \| good	0.139 \| good	0.559 \| good	0.131 \| good
2025-12-30T19:00:00.000Z	28 \| good	0.15 \| good	0.361 \| good	30.413 \| good	0.145 \| good	0.773 \| good	0.132 \| good
2025-12-30T20:00:00.000Z	29 \| good	0.297 \| good	1 \| good	31.417 \| good	0.151 \| good	0.987 \| good	0.132 \| good
2025-12-30T21:00:00.000Z	29 \| good	0.15 \| good	0.067 \| good	31.267 \| good	0.157 \| good	1.201 \| good	0.133 \| good
2025-12-30T22:00:00.000Z	31 \| good	0.298 \| good	1.005 \| good	32.795 \| good	0.182 \| good	1.29 \| good	0.134 \| good
2025-12-30T23:00:00.000Z	32 \| good	0.414 \| good	1.696 \| good	34.956 \| good	0.207 \| good	1.38 \| good	0.134 \| good

Merrimack

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Merrimack, New Hampshire air quality map: Stay updated on AQI near you

0.25ppm

How accurate is New Hampshire, USA air quality data?

Air quality and pollutant data for New Hampshire, 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 Merrimack, New Hampshire?

The air quality information for Merrimack, New Hampshire is updated every hour for accuracy.

What time in the last 24 hours was the air quality in Merrimack, New Hampshire at its worst?

In the past 24 hours, the air quality in Merrimack, New Hampshire was at its worst at 02:00:00 on 2025-12-28.

When did Merrimack, New Hampshire experience the best air quality in the last 24 hours?

In the last 24 hours, the best air quality in Merrimack, New Hampshire was observed at 02:00:00 on 2025-12-28.

What is the AQI in Merrimack, New Hampshire right now?

As of now, the AQI in Merrimack, New Hampshire is 31, indicating Good conditions.

What is the most common type of pollution in Merrimack, New Hampshire?

Merrimack, New Hampshire air has the highest levels of O3.

What should I do in case of poor air quality in Merrimack, New Hampshire?

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

What is the PM_2.5 level in Merrimack, New Hampshire at the moment?

PM_2.5 levels in Merrimack, New Hampshire are currently 4.876 μg/m³.

What is the PM₁₀ level in Merrimack, New Hampshire at the moment?

The PM₁₀ concentration in Merrimack, New Hampshire is 20.09 μg/m³ at the moment.

What is the carbon monoxide (CO) level in Merrimack, New Hampshire at the moment?

The current carbon monoxide (CO) concentration in Merrimack, New Hampshire is 0.207 ppm.

What is the sulfur dioxide (SO₂) level in Merrimack, New Hampshire at the moment?

Currently, Merrimack, New Hampshire has a sulfur dioxide (SO₂) concentration of 0.633 ppb.

What is the ozone (O₃) level in Merrimack, New Hampshire at the moment?

The current ozone (O₃) level in Merrimack, New Hampshire at the moment is 33.644 ppm.

What is the nitrogen dioxide (NO₂) level in Merrimack, New Hampshire at the moment?

Nitrogen dioxide (NO₂) level in Merrimack, New Hampshire at the moment is 19.879 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2025-12-27T00:00:00.000Z	29 \| good	4.907 \| good	16.545 \| good	30.577 \| good	0.55 \| good	16.034 \| good	0.248 \| good
2025-12-27T01:00:00.000Z	38 \| good	6.678 \| good	29.748 \| good	28.754 \| good	0.517 \| good	13.99 \| good	0.316 \| good
2025-12-27T02:00:00.000Z	44 \| good	8.34 \| good	43.009 \| good	23.77 \| good	0.538 \| good	18.573 \| good	0.301 \| good
2025-12-27T03:00:00.000Z	38 \| good	7.241 \| good	25.723 \| good	24.499 \| good	0.497 \| good	10.809 \| good	0.301 \| good
2025-12-27T04:00:00.000Z	38 \| good	6.979 \| good	19.774 \| good	24.434 \| good	0.517 \| good	9.518 \| good	0.301 \| good
2025-12-27T05:00:00.000Z	49 \| good	8.501 \| good	20.583 \| good	24.911 \| good	0.536 \| good	7.843 \| good	0.216 \| good
2025-12-27T06:00:00.000Z	38 \| good	6.867 \| good	25.233 \| good	27.457 \| good	0.556 \| good	6.995 \| good	0.212 \| good
2025-12-27T07:00:00.000Z	33 \| good	6.356 \| good	17.66 \| good	26.949 \| good	0.564 \| good	6.128 \| good	0.212 \| good
2025-12-27T08:00:00.000Z	33 \| good	5.687 \| good	21.305 \| good	28.61 \| good	0.531 \| good	4.169 \| good	0.212 \| good
2025-12-27T09:00:00.000Z	27 \| good	3.951 \| good	10.441 \| good	28.8 \| good	0.571 \| good	5.269 \| good	0.2 \| good
2025-12-27T10:00:00.000Z	29 \| good	3.442 \| good	7.416 \| good	30.631 \| good	0.504 \| good	3.939 \| good	0.215 \| good
2025-12-27T11:00:00.000Z	29 \| good	3.159 \| good	10.937 \| good	30.692 \| good	0.502 \| good	3.161 \| good	0.2 \| good
2025-12-27T12:00:00.000Z	29 \| good	2.806 \| good	10.119 \| good	30.652 \| good	0.503 \| good	3.118 \| good	0.2 \| good
2025-12-27T13:00:00.000Z	30 \| good	2.773 \| good	13.158 \| good	31.823 \| good	0.502 \| good	2.763 \| good	0.2 \| good
2025-12-27T14:00:00.000Z	30 \| good	2.845 \| good	17.23 \| good	32.242 \| good	0.478 \| good	2.632 \| good	0.242 \| good
2025-12-27T15:00:00.000Z	31 \| good	2.739 \| good	10.694 \| good	32.525 \| good	0.499 \| good	3.211 \| good	0.242 \| good
2025-12-27T16:00:00.000Z	31 \| good	2.717 \| good	9.154 \| good	33.382 \| good	0.509 \| good	2.482 \| good	0.212 \| good
2025-12-27T17:00:00.000Z	32 \| good	2.791 \| good	12.673 \| good	35.072 \| good	0.507 \| good	3.062 \| good	0.227 \| good
2025-12-27T18:00:00.000Z	31 \| good	2.895 \| good	10.756 \| good	33.695 \| good	0.533 \| good	3.293 \| good	0.212 \| good
2025-12-27T19:00:00.000Z	32 \| good	3.269 \| good	10.98 \| good	35.371 \| good	0.548 \| good	4.136 \| good	0.212 \| good
2025-12-27T20:00:00.000Z	31 \| good	2.848 \| good	10.485 \| good	34.042 \| good	0.525 \| good	5.096 \| good	0.212 \| good
2025-12-27T21:00:00.000Z	33 \| good	2.973 \| good	11.926 \| good	35.645 \| good	0.472 \| good	6.594 \| good	0.239 \| good
2025-12-27T22:00:00.000Z	32 \| good	2.868 \| good	4.871 \| good	34.836 \| good	0.474 \| good	10.2 \| good	0.266 \| good
2025-12-27T23:00:00.000Z	31 \| good	3.514 \| good	19.026 \| good	34.333 \| good	0.476 \| good	17.745 \| good	0.272 \| good
2025-12-28T00:00:00.000Z	30 \| good	4.897 \| good	21.297 \| good	32.418 \| good	0.506 \| good	14.882 \| good	0.312 \| good
2025-12-28T01:00:00.000Z	30 \| good	5.342 \| good	23.561 \| good	31.977 \| good	0.496 \| good	18.158 \| good	0.371 \| good
2025-12-28T02:00:00.000Z	28 \| good	3.758 \| good	14.587 \| good	30.3 \| good	0.576 \| good	17.168 \| good	0.42 \| good
2025-12-28T03:00:00.000Z	33 \| good	5.912 \| good	25.902 \| good	25.846 \| good	0.358 \| good	4.87 \| good	0.172 \| good
2025-12-28T04:00:00.000Z	33 \| good	6.316 \| good	13.867 \| good	32.276 \| good	0.514 \| good	11.67 \| good	0.359 \| good
2025-12-28T05:00:00.000Z	44 \| good	8.181 \| good	19.7 \| good	31.298 \| good	0.496 \| good	13.207 \| good	0.35 \| good
2025-12-28T06:00:00.000Z	49 \| good	9.054 \| good	16.591 \| good	27.555 \| good	0.496 \| good	12.443 \| good	0.344 \| good
2025-12-28T07:00:00.000Z	52 \| moderate	10.317 \| good	15.374 \| good	20.782 \| good	0.496 \| good	14.57 \| good	0.327 \| good
2025-12-28T08:00:00.000Z	54 \| moderate	10.558 \| good	24.157 \| good	26.286 \| good	0.519 \| good	12.647 \| good	0.257 \| good
2025-12-28T09:00:00.000Z	52 \| moderate	9.846 \| good	39.304 \| good	25.404 \| good	0.547 \| good	16.718 \| good	0.307 \| good
2025-12-28T10:00:00.000Z	44 \| good	7.971 \| good	25.669 \| good	27.348 \| good	0.598 \| good	19.384 \| good	0.316 \| good
2025-12-28T11:00:00.000Z	30 \| good	3.004 \| good	12.928 \| good	32.491 \| good	0.554 \| good	15.757 \| good	0.316 \| good
2025-12-28T12:00:00.000Z	54 \| moderate	11.223 \| good	31.706 \| good	18.215 \| good	0.568 \| good	14.909 \| good	0.31 \| good
2025-12-28T13:00:00.000Z	54 \| moderate	11.344 \| good	31.569 \| good	19.255 \| good	0.563 \| good	14.329 \| good	0.403 \| good
2025-12-28T14:00:00.000Z	62 \| moderate	14.874 \| fine	38.516 \| good	19.887 \| good	0.61 \| good	16.223 \| good	0.295 \| good
2025-12-28T15:00:00.000Z	44 \| good	8.39 \| good	12.028 \| good	40.567 \| good	0.519 \| good	8.034 \| good	0.228 \| good
2025-12-28T16:00:00.000Z	38 \| good	6.428 \| good	15.706 \| good	41.432 \| good	0.631 \| good	7.999 \| good	0.205 \| good
2025-12-28T17:00:00.000Z	31 \| good	5.229 \| good	22.481 \| good	33.053 \| good	0.745 \| good	6.622 \| good	0.192 \| good
2025-12-28T18:00:00.000Z	34 \| good	4.537 \| good	21.304 \| good	36.854 \| good	0.653 \| good	5.214 \| good	0.193 \| good
2025-12-28T19:00:00.000Z	36 \| good	5.877 \| good	23.101 \| good	39.401 \| good	0.685 \| good	6.931 \| good	0.193 \| good
2025-12-28T20:00:00.000Z	37 \| good	4.665 \| good	28.459 \| good	40.155 \| good	0.627 \| good	9.731 \| good	0.257 \| good
2025-12-28T21:00:00.000Z	36 \| good	3.898 \| good	15.341 \| good	38.631 \| good	0.63 \| good	9.156 \| good	0.217 \| good
2025-12-28T22:00:00.000Z	31 \| good	2.858 \| good	5.193 \| good	33.943 \| good	0.647 \| good	19.89 \| good	0.232 \| good
2025-12-28T23:00:00.000Z	31 \| good	4.876 \| good	20.09 \| good	33.644 \| good	0.633 \| good	19.879 \| good	0.207 \| good
2025-12-29T00:00:00.000Z	27 \| good	4.621 \| good	20.276 \| good	22.486 \| good	0.948 \| good	15.482 \| good	0.283 \| good
2025-12-29T01:00:00.000Z	27 \| good	5.201 \| good	22.847 \| good	22.662 \| good	1.137 \| good	14.743 \| good	0.275 \| good
2025-12-29T02:00:00.000Z	44 \| good	8.419 \| good	37.297 \| good	20.79 \| good	1.327 \| good	14.005 \| good	0.266 \| good
2025-12-29T03:00:00.000Z	52 \| moderate	10.079 \| good	44.591 \| good	22.581 \| good	1.516 \| good	13.266 \| good	0.257 \| good
2025-12-29T04:00:00.000Z	54 \| moderate	11.029 \| good	49.102 \| good	23.853 \| good	1.576 \| good	14.468 \| good	0.251 \| good
2025-12-29T05:00:00.000Z	58 \| moderate	12.565 \| fine	56.718 \| fine	19.903 \| good	1.636 \| good	15.67 \| good	0.246 \| good
2025-12-29T06:00:00.000Z	62 \| moderate	15.253 \| fine	68.265 \| fine	13.652 \| good	1.696 \| good	16.871 \| good	0.24 \| good
2025-12-29T07:00:00.000Z	66 \| moderate	16.638 \| fine	74.285 \| fine	10.223 \| good	1.317 \| good	13.963 \| good	0.219 \| good
2025-12-29T08:00:00.000Z	66 \| moderate	16.603 \| fine	73.93 \| fine	8.878 \| good	0.937 \| good	11.054 \| good	0.197 \| good
2025-12-29T09:00:00.000Z	62 \| moderate	15.14 \| fine	67.869 \| fine	9.947 \| good	0.557 \| good	8.146 \| good	0.176 \| good
2025-12-29T10:00:00.000Z	60 \| moderate	14.232 \| fine	63.975 \| fine	11.831 \| good	0.521 \| good	7.357 \| good	0.175 \| good
2025-12-29T11:00:00.000Z	60 \| moderate	13.626 \| fine	60.972 \| fine	11.222 \| good	0.485 \| good	6.568 \| good	0.173 \| good
2025-12-29T12:00:00.000Z	58 \| moderate	12.784 \| fine	57.563 \| fine	10.568 \| good	0.45 \| good	5.779 \| good	0.171 \| good
2025-12-29T13:00:00.000Z	56 \| moderate	12.246 \| fine	54.909 \| good	11.065 \| good	0.613 \| good	6.077 \| good	0.178 \| good
2025-12-29T14:00:00.000Z	56 \| moderate	12.094 \| good	53.76 \| good	12.448 \| good	0.777 \| good	6.375 \| good	0.185 \| good
2025-12-29T15:00:00.000Z	56 \| moderate	11.688 \| good	52.394 \| good	11.768 \| good	0.94 \| good	6.673 \| good	0.191 \| good
2025-12-29T16:00:00.000Z	54 \| moderate	10.797 \| good	47.603 \| good	13.179 \| good	0.976 \| good	7.271 \| good	0.195 \| good
2025-12-29T17:00:00.000Z	54 \| moderate	10.987 \| good	49.301 \| good	12.061 \| good	1.012 \| good	7.869 \| good	0.2 \| good
2025-12-29T18:00:00.000Z	49 \| good	9.234 \| good	40.934 \| good	13.754 \| good	1.047 \| good	8.467 \| good	0.204 \| good
2025-12-29T19:00:00.000Z	38 \| good	7.39 \| good	32.755 \| good	20.499 \| good	1.059 \| good	9.744 \| good	0.211 \| good
2025-12-29T20:00:00.000Z	27 \| good	4.9 \| good	21.141 \| good	27.555 \| good	1.071 \| good	11.021 \| good	0.219 \| good
2025-12-29T21:00:00.000Z	31 \| good	5.234 \| good	22.441 \| good	32.997 \| good	1.082 \| good	12.299 \| good	0.226 \| good
2025-12-29T22:00:00.000Z	30 \| good	4.987 \| good	21.517 \| good	32.121 \| good	1.046 \| good	9.858 \| good	0.211 \| good
2025-12-29T23:00:00.000Z	31 \| good	4.596 \| good	20.173 \| good	32.972 \| good	1.01 \| good	7.418 \| good	0.196 \| good
2025-12-30T00:00:00.000Z	27 \| good	4.669 \| good	20.184 \| good	25.831 \| good	0.974 \| good	4.977 \| good	0.181 \| good
2025-12-30T01:00:00.000Z	22 \| good	4.004 \| good	17.476 \| good	24.474 \| good	0.774 \| good	4.027 \| good	0.178 \| good
2025-12-30T02:00:00.000Z	21 \| good	3.447 \| good	14.692 \| good	23.025 \| good	0.573 \| good	3.077 \| good	0.175 \| good
2025-12-30T03:00:00.000Z	23 \| good	3.12 \| good	13.572 \| good	24.556 \| good	0.373 \| good	2.127 \| good	0.173 \| good
2025-12-30T04:00:00.000Z	26 \| good	1.977 \| good	7.815 \| good	27.897 \| good	0.351 \| good	1.864 \| good	0.164 \| good
2025-12-30T05:00:00.000Z	27 \| good	1.127 \| good	4.764 \| good	29.357 \| good	0.328 \| good	1.601 \| good	0.155 \| good
2025-12-30T06:00:00.000Z	29 \| good	0.582 \| good	2.039 \| good	30.848 \| good	0.306 \| good	1.338 \| good	0.147 \| good
2025-12-30T07:00:00.000Z	29 \| good	0.345 \| good	1.039 \| good	31.36 \| good	0.288 \| good	1.179 \| good	0.143 \| good
2025-12-30T08:00:00.000Z	29 \| good	0.116 \| good	0 \| good	31.09 \| good	0.271 \| good	1.021 \| good	0.14 \| good
2025-12-30T09:00:00.000Z	30 \| good	0.047 \| good	0 \| good	32.031 \| good	0.253 \| good	0.862 \| good	0.137 \| good
2025-12-30T10:00:00.000Z	30 \| good	0.302 \| good	1 \| good	32.031 \| good	0.24 \| good	1.008 \| good	0.138 \| good
2025-12-30T11:00:00.000Z	29 \| good	0.293 \| good	1 \| good	31.268 \| good	0.227 \| good	1.155 \| good	0.14 \| good
2025-12-30T12:00:00.000Z	29 \| good	0.264 \| good	1 \| good	30.895 \| good	0.213 \| good	1.301 \| good	0.141 \| good
2025-12-30T13:00:00.000Z	30 \| good	0.233 \| good	1 \| good	31.507 \| good	0.19 \| good	1.069 \| good	0.139 \| good
2025-12-30T14:00:00.000Z	30 \| good	0.15 \| good	0.137 \| good	31.51 \| good	0.167 \| good	0.837 \| good	0.136 \| good
2025-12-30T15:00:00.000Z	29 \| good	0.145 \| good	0.106 \| good	30.853 \| good	0.145 \| good	0.604 \| good	0.134 \| good
2025-12-30T16:00:00.000Z	29 \| good	0.269 \| good	0.923 \| good	31.088 \| good	0.143 \| good	0.589 \| good	0.133 \| good
2025-12-30T17:00:00.000Z	30 \| good	0.26 \| good	0.89 \| good	31.614 \| good	0.141 \| good	0.574 \| good	0.132 \| good
2025-12-30T18:00:00.000Z	28 \| good	0.112 \| good	0 \| good	30.338 \| good	0.139 \| good	0.559 \| good	0.131 \| good
2025-12-30T19:00:00.000Z	28 \| good	0.15 \| good	0.361 \| good	30.413 \| good	0.145 \| good	0.773 \| good	0.132 \| good
2025-12-30T20:00:00.000Z	29 \| good	0.297 \| good	1 \| good	31.417 \| good	0.151 \| good	0.987 \| good	0.132 \| good
2025-12-30T21:00:00.000Z	29 \| good	0.15 \| good	0.067 \| good	31.267 \| good	0.157 \| good	1.201 \| good	0.133 \| good
2025-12-30T22:00:00.000Z	31 \| good	0.298 \| good	1.005 \| good	32.795 \| good	0.182 \| good	1.29 \| good	0.134 \| good
2025-12-30T23:00:00.000Z	32 \| good	0.414 \| good	1.696 \| good	34.956 \| good	0.207 \| good	1.38 \| good	0.134 \| good

Live air quality index in Merrimack, New Hampshire today

Major air pollutants in Merrimack, New Hampshire

Particulate Matter2.5 (PM2.5)

Particulate Matter10 (PM10)

Ozone (O3)

Sulfur Dioxide (SO2)

Nitrogen Dioxide (NO2)

Carbon Monoxide (CO)

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Merrimack, New Hampshire air quality map: Stay updated on AQI near you

Air quality in nearby cities

Bedford, New Hampshire

Amherst, New Hampshire

Londonderry, New Hampshire

Nashua, New Hampshire

Hudson, New Hampshire

Milford, New Hampshire

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Frequently asked questions

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What is the sulfur dioxide (SO2) level in Merrimack, New Hampshire at the moment?

What is the ozone (O3) level in Merrimack, New Hampshire at the moment?

What is the nitrogen dioxide (NO2) level in Merrimack, New Hampshire at the moment?

Particulate Matter_2.5 (PM_2.5)

Particulate Matter₁₀ (PM₁₀)

Ozone (O₃)

Sulfur Dioxide (SO₂)

Nitrogen Dioxide (NO₂)

What is the PM_2.5 level in Merrimack, New Hampshire at the moment?

What is the PM₁₀ level in Merrimack, New Hampshire at the moment?

What is the sulfur dioxide (SO₂) level in Merrimack, New Hampshire at the moment?

What is the ozone (O₃) level in Merrimack, New Hampshire at the moment?

What is the nitrogen dioxide (NO₂) level in Merrimack, New Hampshire at the moment?