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 0.827 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 23.019 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 2.152 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 0.482 μg/m3.

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

The PM10 concentration in Merrimack, New Hampshire is 1.62 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)

0.48 μg/m³

12.1

35.5

55.5

250.5

500.5+

Particulate Matter₁₀ (PM₁₀)

1.62 μg/m³

155

255

425

605+

Ozone (O₃)

23.02 ppb

201

201+

Sulfur Dioxide (SO₂)

0.83 ppb

186

605

1005+

Nitrogen Dioxide (NO₂)

2.15 ppb

101

361

1250

2050+

Carbon Monoxide (CO)

0.15 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
2026-09-26T23:00:00.000Z	28 \| good	3.572 \| good	10.443 \| good	30.074 \| good	0.703 \| good	0.919 \| good	0.178 \| good
2026-09-27T00:00:00.000Z	31 \| good	3.641 \| good	9.083 \| good	32.973 \| good	0.713 \| good	1.191 \| good	0.178 \| good
2026-09-27T01:00:00.000Z	27 \| good	3.645 \| good	10.811 \| good	29.25 \| good	0.708 \| good	0.715 \| good	0.178 \| good
2026-09-27T02:00:00.000Z	28 \| good	3.833 \| good	10.616 \| good	29.928 \| good	0.745 \| good	0.629 \| good	0.135 \| good
2026-09-27T03:00:00.000Z	23 \| good	0.857 \| good	3.222 \| good	25.407 \| good	0.163 \| good	0.957 \| good	0.135 \| good
2026-09-27T04:00:00.000Z	30 \| good	3.765 \| good	9.885 \| good	32.065 \| good	0.913 \| good	1.939 \| good	0.178 \| good
2026-09-27T05:00:00.000Z	29 \| good	3.476 \| good	9.205 \| good	30.892 \| good	0.802 \| good	1.542 \| good	0.178 \| good
2026-09-27T06:00:00.000Z	28 \| good	2.782 \| good	6.952 \| good	29.873 \| good	0.885 \| good	0.806 \| good	0.135 \| good
2026-09-27T07:00:00.000Z	27 \| good	2.825 \| good	6.965 \| good	29.45 \| good	0.885 \| good	1.543 \| good	0.135 \| good
2026-09-27T08:00:00.000Z	28 \| good	1.321 \| good	3.851 \| good	29.527 \| good	0.852 \| good	0.57 \| good	0.135 \| good
2026-09-27T09:00:00.000Z	28 \| good	1.275 \| good	6.633 \| good	30.41 \| good	0.843 \| good	1.358 \| good	0.135 \| good
2026-09-27T10:00:00.000Z	29 \| good	0.857 \| good	3.193 \| good	30.616 \| good	0.833 \| good	1.428 \| good	0.135 \| good
2026-09-27T11:00:00.000Z	29 \| good	1.195 \| good	3.175 \| good	30.788 \| good	0.885 \| good	1.788 \| good	0.135 \| good
2026-09-27T12:00:00.000Z	28 \| good	0.772 \| good	3.09 \| good	30.089 \| good	0.87 \| good	1.545 \| good	0.135 \| good
2026-09-27T13:00:00.000Z	29 \| good	0.696 \| good	3.602 \| good	31.431 \| good	0.87 \| good	0.504 \| good	0.135 \| good
2026-09-27T14:00:00.000Z	27 \| good	0.55 \| good	2.108 \| good	28.94 \| good	0.87 \| good	0.761 \| good	0.135 \| good
2026-09-27T15:00:00.000Z	30 \| good	0.595 \| good	1.627 \| good	31.616 \| good	0.716 \| good	0.752 \| good	0.147 \| good
2026-09-27T16:00:00.000Z	30 \| good	0.692 \| good	3.23 \| good	31.533 \| good	0.902 \| good	0.945 \| good	0.147 \| good
2026-09-27T17:00:00.000Z	30 \| good	0.549 \| good	2.416 \| good	31.744 \| good	0.843 \| good	0.779 \| good	0.147 \| good
2026-09-27T18:00:00.000Z	30 \| good	0.601 \| good	3.037 \| good	31.718 \| good	0.886 \| good	1.15 \| good	0.147 \| good
2026-09-27T19:00:00.000Z	29 \| good	0.712 \| good	7.768 \| good	30.739 \| good	0.784 \| good	0.779 \| good	0.147 \| good
2026-09-27T20:00:00.000Z	28 \| good	1.062 \| good	4.584 \| good	30.447 \| good	0.877 \| good	0.796 \| good	0.147 \| good
2026-09-27T21:00:00.000Z	28 \| good	1.234 \| good	6.067 \| good	30.336 \| good	0.814 \| good	0.833 \| good	0.147 \| good
2026-09-27T22:00:00.000Z	29 \| good	1.065 \| good	6.179 \| good	30.838 \| good	0.868 \| good	0.89 \| good	0.147 \| good
2026-09-27T23:00:00.000Z	27 \| good	1.008 \| good	5.124 \| good	29.406 \| good	0.852 \| good	0.772 \| good	0.147 \| good
2026-09-28T00:00:00.000Z	29 \| good	1.815 \| good	5.975 \| good	30.726 \| good	0.832 \| good	0.777 \| good	0.147 \| good
2026-09-28T01:00:00.000Z	29 \| good	1.028 \| good	2.896 \| good	31.068 \| good	0.884 \| good	0.662 \| good	0.135 \| good
2026-09-28T02:00:00.000Z	28 \| good	1.17 \| good	2.978 \| good	30.484 \| good	0.842 \| good	0.512 \| good	0.135 \| good
2026-09-28T03:00:00.000Z	26 \| good	2.675 \| good	10.977 \| good	27.932 \| good	0.156 \| good	1.243 \| good	0.128 \| good
2026-09-28T04:00:00.000Z	29 \| good	1.505 \| good	3.422 \| good	30.729 \| good	0.903 \| good	0.873 \| good	0.135 \| good
2026-09-28T05:00:00.000Z	29 \| good	1.295 \| good	4.02 \| good	30.839 \| good	0.861 \| good	0.841 \| good	0.135 \| good
2026-09-28T06:00:00.000Z	27 \| good	1.446 \| good	4.385 \| good	29.305 \| good	0.885 \| good	0.802 \| good	0.135 \| good
2026-09-28T07:00:00.000Z	28 \| good	1.819 \| good	2.623 \| good	30.362 \| good	0.885 \| good	0.828 \| good	0.135 \| good
2026-09-28T08:00:00.000Z	28 \| good	1.587 \| good	4.663 \| good	30.359 \| good	0.885 \| good	0.554 \| good	0.135 \| good
2026-09-28T09:00:00.000Z	27 \| good	1.389 \| good	3.223 \| good	28.798 \| good	0.841 \| good	0.675 \| good	0.135 \| good
2026-09-28T10:00:00.000Z	27 \| good	1.075 \| good	3.371 \| good	28.513 \| good	0.732 \| good	1.016 \| good	0.135 \| good
2026-09-28T11:00:00.000Z	27 \| good	0.871 \| good	2.429 \| good	28.668 \| good	0.885 \| good	1.429 \| good	0.147 \| good
2026-09-28T12:00:00.000Z	25 \| good	0.65 \| good	2.52 \| good	27.378 \| good	0.814 \| good	1.626 \| good	0.147 \| good
2026-09-28T13:00:00.000Z	25 \| good	0.764 \| good	1.639 \| good	26.552 \| good	0.814 \| good	1.564 \| good	0.147 \| good
2026-09-28T14:00:00.000Z	25 \| good	0.547 \| good	2.596 \| good	26.805 \| good	0.867 \| good	1.464 \| good	0.168 \| good
2026-09-28T15:00:00.000Z	25 \| good	0.84 \| good	5.613 \| good	26.58 \| good	0.816 \| good	1.36 \| good	0.166 \| good
2026-09-28T16:00:00.000Z	23 \| good	0.909 \| good	2.755 \| good	25.24 \| good	0.849 \| good	1.032 \| good	0.156 \| good
2026-09-28T17:00:00.000Z	23 \| good	0.633 \| good	2.325 \| good	24.743 \| good	0.888 \| good	1.154 \| good	0.156 \| good
2026-09-28T18:00:00.000Z	22 \| good	0.568 \| good	2.753 \| good	24.033 \| good	0.879 \| good	1.599 \| good	0.156 \| good
2026-09-28T19:00:00.000Z	23 \| good	0.828 \| good	2.753 \| good	25.2 \| good	0.798 \| good	1.52 \| good	0.166 \| good
2026-09-28T20:00:00.000Z	22 \| good	0.589 \| good	3.785 \| good	23.899 \| good	0.932 \| good	2.251 \| good	0.166 \| good
2026-09-28T21:00:00.000Z	23 \| good	0.648 \| good	3.335 \| good	24.983 \| good	0.788 \| good	1.948 \| good	0.166 \| good
2026-09-28T22:00:00.000Z	21 \| good	0.595 \| good	3.02 \| good	22.769 \| good	0.888 \| good	2.037 \| good	0.166 \| good
2026-09-28T22:00:00.000Z	21 \| good	0.482 \| good	1.62 \| good	23.019 \| good	0.827 \| good	2.152 \| good	0.153 \| good
2026-09-28T23:00:00.000Z	25 \| good	1.858 \| good	7.858 \| good	26.725 \| good	0.179 \| good	2.73 \| good	0.152 \| good
2026-09-29T00:00:00.000Z	24 \| good	2.468 \| good	10.02 \| good	26.051 \| good	0.198 \| good	2.779 \| good	0.152 \| good
2026-09-29T01:00:00.000Z	21 \| good	2.645 \| good	10.74 \| good	23.061 \| good	0.215 \| good	2.882 \| good	0.152 \| good
2026-09-29T02:00:00.000Z	19 \| good	2.761 \| good	11.234 \| good	20.902 \| good	0.232 \| good	2.957 \| good	0.153 \| good
2026-09-29T03:00:00.000Z	19 \| good	2.764 \| good	11.252 \| good	20.504 \| good	0.238 \| good	2.944 \| good	0.153 \| good
2026-09-29T04:00:00.000Z	20 \| good	2.46 \| good	10.039 \| good	21.58 \| good	0.23 \| good	2.631 \| good	0.151 \| good
2026-09-29T05:00:00.000Z	21 \| good	2.317 \| good	9.91 \| good	22.761 \| good	0.218 \| good	2.348 \| good	0.149 \| good
2026-09-29T06:00:00.000Z	22 \| good	2.528 \| good	10 \| good	23.563 \| good	0.205 \| good	2.136 \| good	0.147 \| good
2026-09-29T07:00:00.000Z	21 \| good	3.049 \| good	12.551 \| good	22.747 \| good	0.189 \| good	1.984 \| good	0.145 \| good
2026-09-29T08:00:00.000Z	19 \| good	3.142 \| good	13.933 \| good	20.105 \| good	0.173 \| good	1.894 \| good	0.145 \| good
2026-09-29T09:00:00.000Z	22 \| good	3.521 \| good	15.657 \| good	16.555 \| good	0.157 \| good	1.861 \| good	0.144 \| good
2026-09-29T10:00:00.000Z	22 \| good	3.652 \| good	15.83 \| good	14.872 \| good	0.148 \| good	1.98 \| good	0.146 \| good
2026-09-29T11:00:00.000Z	22 \| good	3.613 \| good	15.778 \| good	14.78 \| good	0.16 \| good	2.676 \| good	0.153 \| good
2026-09-29T12:00:00.000Z	17 \| good	3.258 \| good	14.222 \| good	17.543 \| good	0.174 \| good	3.213 \| good	0.165 \| good
2026-09-29T13:00:00.000Z	22 \| good	3.077 \| good	13.2 \| good	23.637 \| good	0.175 \| good	2.54 \| good	0.164 \| good
2026-09-29T14:00:00.000Z	26 \| good	3.021 \| good	12.134 \| good	27.543 \| good	0.18 \| good	1.792 \| good	0.159 \| good
2026-09-29T15:00:00.000Z	26 \| good	3.143 \| good	13.819 \| good	28.203 \| good	0.19 \| good	1.303 \| good	0.151 \| good
2026-09-29T16:00:00.000Z	27 \| good	3.389 \| good	15.005 \| good	28.542 \| good	0.205 \| good	1.121 \| good	0.147 \| good
2026-09-29T17:00:00.000Z	27 \| good	3.403 \| good	15.036 \| good	29.283 \| good	0.222 \| good	1.071 \| good	0.147 \| good
2026-09-29T18:00:00.000Z	29 \| good	3.61 \| good	16.056 \| good	31.214 \| good	0.244 \| good	1.059 \| good	0.148 \| good
2026-09-29T19:00:00.000Z	30 \| good	3.864 \| good	16.847 \| good	31.724 \| good	0.271 \| good	1.13 \| good	0.151 \| good
2026-09-29T20:00:00.000Z	29 \| good	3.81 \| good	16.633 \| good	31.151 \| good	0.304 \| good	1.295 \| good	0.154 \| good
2026-09-29T21:00:00.000Z	27 \| good	3.315 \| good	14.347 \| good	29.347 \| good	0.335 \| good	1.562 \| good	0.157 \| good
2026-09-29T22:00:00.000Z	24 \| good	3.318 \| good	14.465 \| good	26.227 \| good	0.368 \| good	2.532 \| good	0.167 \| good
2026-09-29T23:00:00.000Z	22 \| good	3.499 \| good	15.409 \| good	23.505 \| good	0.418 \| good	4.363 \| good	0.183 \| good
2026-09-30T00:00:00.000Z	25 \| good	4.385 \| good	19.053 \| good	26.792 \| good	0.465 \| good	4.973 \| good	0.187 \| good
2026-09-30T01:00:00.000Z	24 \| good	4.197 \| good	18.304 \| good	26.121 \| good	0.508 \| good	4.909 \| good	0.186 \| good
2026-09-30T02:00:00.000Z	27 \| good	4.688 \| good	20.463 \| good	24.457 \| good	0.546 \| good	4.846 \| good	0.185 \| good
2026-09-30T03:00:00.000Z	27 \| good	4.776 \| good	20.729 \| good	23.073 \| good	0.566 \| good	4.741 \| good	0.185 \| good
2026-09-30T04:00:00.000Z	27 \| good	4.572 \| good	20.172 \| good	22.933 \| good	0.56 \| good	4.429 \| good	0.183 \| good
2026-09-30T05:00:00.000Z	22 \| good	4.038 \| good	17.614 \| good	18.793 \| good	0.545 \| good	4.165 \| good	0.182 \| good
2026-09-30T06:00:00.000Z	22 \| good	4.115 \| good	17.763 \| good	17.965 \| good	0.525 \| good	4.117 \| good	0.182 \| good
2026-09-30T07:00:00.000Z	27 \| good	5 \| good	21.357 \| good	16.849 \| good	0.507 \| good	4.241 \| good	0.183 \| good
2026-09-30T08:00:00.000Z	27 \| good	4.979 \| good	21.363 \| good	16.271 \| good	0.501 \| good	4.61 \| good	0.186 \| good
2026-09-30T09:00:00.000Z	22 \| good	3.844 \| good	16.582 \| good	13.564 \| good	0.5 \| good	4.808 \| good	0.189 \| good
2026-09-30T10:00:00.000Z	27 \| good	4.597 \| good	20.02 \| good	13.932 \| good	0.503 \| good	5.051 \| good	0.192 \| good
2026-09-30T11:00:00.000Z	22 \| good	4.339 \| good	19.002 \| good	16.673 \| good	0.53 \| good	5.796 \| good	0.202 \| good
2026-09-30T12:00:00.000Z	22 \| good	4.287 \| good	18.726 \| good	17.719 \| good	0.533 \| good	4.88 \| good	0.203 \| good
2026-09-30T13:00:00.000Z	22 \| good	4.16 \| good	18.136 \| good	19.711 \| good	0.526 \| good	3.725 \| good	0.199 \| good
2026-09-30T14:00:00.000Z	27 \| good	4.952 \| good	21.321 \| good	24.034 \| good	0.493 \| good	2.467 \| good	0.19 \| good
2026-09-30T15:00:00.000Z	27 \| good	4.774 \| good	20.556 \| good	28.052 \| good	0.401 \| good	1.351 \| good	0.172 \| good
2026-09-30T16:00:00.000Z	29 \| good	4.875 \| good	21.238 \| good	31.234 \| good	0.336 \| good	0.961 \| good	0.162 \| good
2026-09-30T17:00:00.000Z	31 \| good	4.435 \| good	19.194 \| good	33.773 \| good	0.293 \| good	0.966 \| good	0.155 \| good
2026-09-30T18:00:00.000Z	31 \| good	3.731 \| good	16.228 \| good	33.859 \| good	0.281 \| good	0.932 \| good	0.153 \| good
2026-09-30T19:00:00.000Z	31 \| good	3.064 \| good	12.842 \| good	33.438 \| good	0.268 \| good	0.992 \| good	0.151 \| good
2026-09-30T20:00:00.000Z	29 \| good	3.064 \| good	12.818 \| good	30.855 \| good	0.266 \| good	1.249 \| good	0.152 \| good
2026-09-30T21:00:00.000Z	28 \| good	3.79 \| good	16.715 \| good	29.932 \| good	0.276 \| good	2.152 \| good	0.163 \| good
2026-09-30T22:00:00.000Z	26 \| good	2.723 \| good	11.487 \| good	28.377 \| good	0.341 \| good	5.969 \| good	0.208 \| good

Merrimack

Get reliable air quality data to drive your business

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

0.18ppm

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 05:00:00 on 2026-09-28.

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 08:00:00 on 2026-09-28.

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

As of now, the AQI in Merrimack, New Hampshire is 21, 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 0.482 μg/m³.

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

The PM₁₀ concentration in Merrimack, New Hampshire is 1.62 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 0.153 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 0.827 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 23.019 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 2.152 ppb.

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Time	AQI	PM_2.5	PM₁₀	O₃	SO₂	NO₂	CO
2026-09-26T23:00:00.000Z	28 \| good	3.572 \| good	10.443 \| good	30.074 \| good	0.703 \| good	0.919 \| good	0.178 \| good
2026-09-27T00:00:00.000Z	31 \| good	3.641 \| good	9.083 \| good	32.973 \| good	0.713 \| good	1.191 \| good	0.178 \| good
2026-09-27T01:00:00.000Z	27 \| good	3.645 \| good	10.811 \| good	29.25 \| good	0.708 \| good	0.715 \| good	0.178 \| good
2026-09-27T02:00:00.000Z	28 \| good	3.833 \| good	10.616 \| good	29.928 \| good	0.745 \| good	0.629 \| good	0.135 \| good
2026-09-27T03:00:00.000Z	23 \| good	0.857 \| good	3.222 \| good	25.407 \| good	0.163 \| good	0.957 \| good	0.135 \| good
2026-09-27T04:00:00.000Z	30 \| good	3.765 \| good	9.885 \| good	32.065 \| good	0.913 \| good	1.939 \| good	0.178 \| good
2026-09-27T05:00:00.000Z	29 \| good	3.476 \| good	9.205 \| good	30.892 \| good	0.802 \| good	1.542 \| good	0.178 \| good
2026-09-27T06:00:00.000Z	28 \| good	2.782 \| good	6.952 \| good	29.873 \| good	0.885 \| good	0.806 \| good	0.135 \| good
2026-09-27T07:00:00.000Z	27 \| good	2.825 \| good	6.965 \| good	29.45 \| good	0.885 \| good	1.543 \| good	0.135 \| good
2026-09-27T08:00:00.000Z	28 \| good	1.321 \| good	3.851 \| good	29.527 \| good	0.852 \| good	0.57 \| good	0.135 \| good
2026-09-27T09:00:00.000Z	28 \| good	1.275 \| good	6.633 \| good	30.41 \| good	0.843 \| good	1.358 \| good	0.135 \| good
2026-09-27T10:00:00.000Z	29 \| good	0.857 \| good	3.193 \| good	30.616 \| good	0.833 \| good	1.428 \| good	0.135 \| good
2026-09-27T11:00:00.000Z	29 \| good	1.195 \| good	3.175 \| good	30.788 \| good	0.885 \| good	1.788 \| good	0.135 \| good
2026-09-27T12:00:00.000Z	28 \| good	0.772 \| good	3.09 \| good	30.089 \| good	0.87 \| good	1.545 \| good	0.135 \| good
2026-09-27T13:00:00.000Z	29 \| good	0.696 \| good	3.602 \| good	31.431 \| good	0.87 \| good	0.504 \| good	0.135 \| good
2026-09-27T14:00:00.000Z	27 \| good	0.55 \| good	2.108 \| good	28.94 \| good	0.87 \| good	0.761 \| good	0.135 \| good
2026-09-27T15:00:00.000Z	30 \| good	0.595 \| good	1.627 \| good	31.616 \| good	0.716 \| good	0.752 \| good	0.147 \| good
2026-09-27T16:00:00.000Z	30 \| good	0.692 \| good	3.23 \| good	31.533 \| good	0.902 \| good	0.945 \| good	0.147 \| good
2026-09-27T17:00:00.000Z	30 \| good	0.549 \| good	2.416 \| good	31.744 \| good	0.843 \| good	0.779 \| good	0.147 \| good
2026-09-27T18:00:00.000Z	30 \| good	0.601 \| good	3.037 \| good	31.718 \| good	0.886 \| good	1.15 \| good	0.147 \| good
2026-09-27T19:00:00.000Z	29 \| good	0.712 \| good	7.768 \| good	30.739 \| good	0.784 \| good	0.779 \| good	0.147 \| good
2026-09-27T20:00:00.000Z	28 \| good	1.062 \| good	4.584 \| good	30.447 \| good	0.877 \| good	0.796 \| good	0.147 \| good
2026-09-27T21:00:00.000Z	28 \| good	1.234 \| good	6.067 \| good	30.336 \| good	0.814 \| good	0.833 \| good	0.147 \| good
2026-09-27T22:00:00.000Z	29 \| good	1.065 \| good	6.179 \| good	30.838 \| good	0.868 \| good	0.89 \| good	0.147 \| good
2026-09-27T23:00:00.000Z	27 \| good	1.008 \| good	5.124 \| good	29.406 \| good	0.852 \| good	0.772 \| good	0.147 \| good
2026-09-28T00:00:00.000Z	29 \| good	1.815 \| good	5.975 \| good	30.726 \| good	0.832 \| good	0.777 \| good	0.147 \| good
2026-09-28T01:00:00.000Z	29 \| good	1.028 \| good	2.896 \| good	31.068 \| good	0.884 \| good	0.662 \| good	0.135 \| good
2026-09-28T02:00:00.000Z	28 \| good	1.17 \| good	2.978 \| good	30.484 \| good	0.842 \| good	0.512 \| good	0.135 \| good
2026-09-28T03:00:00.000Z	26 \| good	2.675 \| good	10.977 \| good	27.932 \| good	0.156 \| good	1.243 \| good	0.128 \| good
2026-09-28T04:00:00.000Z	29 \| good	1.505 \| good	3.422 \| good	30.729 \| good	0.903 \| good	0.873 \| good	0.135 \| good
2026-09-28T05:00:00.000Z	29 \| good	1.295 \| good	4.02 \| good	30.839 \| good	0.861 \| good	0.841 \| good	0.135 \| good
2026-09-28T06:00:00.000Z	27 \| good	1.446 \| good	4.385 \| good	29.305 \| good	0.885 \| good	0.802 \| good	0.135 \| good
2026-09-28T07:00:00.000Z	28 \| good	1.819 \| good	2.623 \| good	30.362 \| good	0.885 \| good	0.828 \| good	0.135 \| good
2026-09-28T08:00:00.000Z	28 \| good	1.587 \| good	4.663 \| good	30.359 \| good	0.885 \| good	0.554 \| good	0.135 \| good
2026-09-28T09:00:00.000Z	27 \| good	1.389 \| good	3.223 \| good	28.798 \| good	0.841 \| good	0.675 \| good	0.135 \| good
2026-09-28T10:00:00.000Z	27 \| good	1.075 \| good	3.371 \| good	28.513 \| good	0.732 \| good	1.016 \| good	0.135 \| good
2026-09-28T11:00:00.000Z	27 \| good	0.871 \| good	2.429 \| good	28.668 \| good	0.885 \| good	1.429 \| good	0.147 \| good
2026-09-28T12:00:00.000Z	25 \| good	0.65 \| good	2.52 \| good	27.378 \| good	0.814 \| good	1.626 \| good	0.147 \| good
2026-09-28T13:00:00.000Z	25 \| good	0.764 \| good	1.639 \| good	26.552 \| good	0.814 \| good	1.564 \| good	0.147 \| good
2026-09-28T14:00:00.000Z	25 \| good	0.547 \| good	2.596 \| good	26.805 \| good	0.867 \| good	1.464 \| good	0.168 \| good
2026-09-28T15:00:00.000Z	25 \| good	0.84 \| good	5.613 \| good	26.58 \| good	0.816 \| good	1.36 \| good	0.166 \| good
2026-09-28T16:00:00.000Z	23 \| good	0.909 \| good	2.755 \| good	25.24 \| good	0.849 \| good	1.032 \| good	0.156 \| good
2026-09-28T17:00:00.000Z	23 \| good	0.633 \| good	2.325 \| good	24.743 \| good	0.888 \| good	1.154 \| good	0.156 \| good
2026-09-28T18:00:00.000Z	22 \| good	0.568 \| good	2.753 \| good	24.033 \| good	0.879 \| good	1.599 \| good	0.156 \| good
2026-09-28T19:00:00.000Z	23 \| good	0.828 \| good	2.753 \| good	25.2 \| good	0.798 \| good	1.52 \| good	0.166 \| good
2026-09-28T20:00:00.000Z	22 \| good	0.589 \| good	3.785 \| good	23.899 \| good	0.932 \| good	2.251 \| good	0.166 \| good
2026-09-28T21:00:00.000Z	23 \| good	0.648 \| good	3.335 \| good	24.983 \| good	0.788 \| good	1.948 \| good	0.166 \| good
2026-09-28T22:00:00.000Z	21 \| good	0.595 \| good	3.02 \| good	22.769 \| good	0.888 \| good	2.037 \| good	0.166 \| good
2026-09-28T22:00:00.000Z	21 \| good	0.482 \| good	1.62 \| good	23.019 \| good	0.827 \| good	2.152 \| good	0.153 \| good
2026-09-28T23:00:00.000Z	25 \| good	1.858 \| good	7.858 \| good	26.725 \| good	0.179 \| good	2.73 \| good	0.152 \| good
2026-09-29T00:00:00.000Z	24 \| good	2.468 \| good	10.02 \| good	26.051 \| good	0.198 \| good	2.779 \| good	0.152 \| good
2026-09-29T01:00:00.000Z	21 \| good	2.645 \| good	10.74 \| good	23.061 \| good	0.215 \| good	2.882 \| good	0.152 \| good
2026-09-29T02:00:00.000Z	19 \| good	2.761 \| good	11.234 \| good	20.902 \| good	0.232 \| good	2.957 \| good	0.153 \| good
2026-09-29T03:00:00.000Z	19 \| good	2.764 \| good	11.252 \| good	20.504 \| good	0.238 \| good	2.944 \| good	0.153 \| good
2026-09-29T04:00:00.000Z	20 \| good	2.46 \| good	10.039 \| good	21.58 \| good	0.23 \| good	2.631 \| good	0.151 \| good
2026-09-29T05:00:00.000Z	21 \| good	2.317 \| good	9.91 \| good	22.761 \| good	0.218 \| good	2.348 \| good	0.149 \| good
2026-09-29T06:00:00.000Z	22 \| good	2.528 \| good	10 \| good	23.563 \| good	0.205 \| good	2.136 \| good	0.147 \| good
2026-09-29T07:00:00.000Z	21 \| good	3.049 \| good	12.551 \| good	22.747 \| good	0.189 \| good	1.984 \| good	0.145 \| good
2026-09-29T08:00:00.000Z	19 \| good	3.142 \| good	13.933 \| good	20.105 \| good	0.173 \| good	1.894 \| good	0.145 \| good
2026-09-29T09:00:00.000Z	22 \| good	3.521 \| good	15.657 \| good	16.555 \| good	0.157 \| good	1.861 \| good	0.144 \| good
2026-09-29T10:00:00.000Z	22 \| good	3.652 \| good	15.83 \| good	14.872 \| good	0.148 \| good	1.98 \| good	0.146 \| good
2026-09-29T11:00:00.000Z	22 \| good	3.613 \| good	15.778 \| good	14.78 \| good	0.16 \| good	2.676 \| good	0.153 \| good
2026-09-29T12:00:00.000Z	17 \| good	3.258 \| good	14.222 \| good	17.543 \| good	0.174 \| good	3.213 \| good	0.165 \| good
2026-09-29T13:00:00.000Z	22 \| good	3.077 \| good	13.2 \| good	23.637 \| good	0.175 \| good	2.54 \| good	0.164 \| good
2026-09-29T14:00:00.000Z	26 \| good	3.021 \| good	12.134 \| good	27.543 \| good	0.18 \| good	1.792 \| good	0.159 \| good
2026-09-29T15:00:00.000Z	26 \| good	3.143 \| good	13.819 \| good	28.203 \| good	0.19 \| good	1.303 \| good	0.151 \| good
2026-09-29T16:00:00.000Z	27 \| good	3.389 \| good	15.005 \| good	28.542 \| good	0.205 \| good	1.121 \| good	0.147 \| good
2026-09-29T17:00:00.000Z	27 \| good	3.403 \| good	15.036 \| good	29.283 \| good	0.222 \| good	1.071 \| good	0.147 \| good
2026-09-29T18:00:00.000Z	29 \| good	3.61 \| good	16.056 \| good	31.214 \| good	0.244 \| good	1.059 \| good	0.148 \| good
2026-09-29T19:00:00.000Z	30 \| good	3.864 \| good	16.847 \| good	31.724 \| good	0.271 \| good	1.13 \| good	0.151 \| good
2026-09-29T20:00:00.000Z	29 \| good	3.81 \| good	16.633 \| good	31.151 \| good	0.304 \| good	1.295 \| good	0.154 \| good
2026-09-29T21:00:00.000Z	27 \| good	3.315 \| good	14.347 \| good	29.347 \| good	0.335 \| good	1.562 \| good	0.157 \| good
2026-09-29T22:00:00.000Z	24 \| good	3.318 \| good	14.465 \| good	26.227 \| good	0.368 \| good	2.532 \| good	0.167 \| good
2026-09-29T23:00:00.000Z	22 \| good	3.499 \| good	15.409 \| good	23.505 \| good	0.418 \| good	4.363 \| good	0.183 \| good
2026-09-30T00:00:00.000Z	25 \| good	4.385 \| good	19.053 \| good	26.792 \| good	0.465 \| good	4.973 \| good	0.187 \| good
2026-09-30T01:00:00.000Z	24 \| good	4.197 \| good	18.304 \| good	26.121 \| good	0.508 \| good	4.909 \| good	0.186 \| good
2026-09-30T02:00:00.000Z	27 \| good	4.688 \| good	20.463 \| good	24.457 \| good	0.546 \| good	4.846 \| good	0.185 \| good
2026-09-30T03:00:00.000Z	27 \| good	4.776 \| good	20.729 \| good	23.073 \| good	0.566 \| good	4.741 \| good	0.185 \| good
2026-09-30T04:00:00.000Z	27 \| good	4.572 \| good	20.172 \| good	22.933 \| good	0.56 \| good	4.429 \| good	0.183 \| good
2026-09-30T05:00:00.000Z	22 \| good	4.038 \| good	17.614 \| good	18.793 \| good	0.545 \| good	4.165 \| good	0.182 \| good
2026-09-30T06:00:00.000Z	22 \| good	4.115 \| good	17.763 \| good	17.965 \| good	0.525 \| good	4.117 \| good	0.182 \| good
2026-09-30T07:00:00.000Z	27 \| good	5 \| good	21.357 \| good	16.849 \| good	0.507 \| good	4.241 \| good	0.183 \| good
2026-09-30T08:00:00.000Z	27 \| good	4.979 \| good	21.363 \| good	16.271 \| good	0.501 \| good	4.61 \| good	0.186 \| good
2026-09-30T09:00:00.000Z	22 \| good	3.844 \| good	16.582 \| good	13.564 \| good	0.5 \| good	4.808 \| good	0.189 \| good
2026-09-30T10:00:00.000Z	27 \| good	4.597 \| good	20.02 \| good	13.932 \| good	0.503 \| good	5.051 \| good	0.192 \| good
2026-09-30T11:00:00.000Z	22 \| good	4.339 \| good	19.002 \| good	16.673 \| good	0.53 \| good	5.796 \| good	0.202 \| good
2026-09-30T12:00:00.000Z	22 \| good	4.287 \| good	18.726 \| good	17.719 \| good	0.533 \| good	4.88 \| good	0.203 \| good
2026-09-30T13:00:00.000Z	22 \| good	4.16 \| good	18.136 \| good	19.711 \| good	0.526 \| good	3.725 \| good	0.199 \| good
2026-09-30T14:00:00.000Z	27 \| good	4.952 \| good	21.321 \| good	24.034 \| good	0.493 \| good	2.467 \| good	0.19 \| good
2026-09-30T15:00:00.000Z	27 \| good	4.774 \| good	20.556 \| good	28.052 \| good	0.401 \| good	1.351 \| good	0.172 \| good
2026-09-30T16:00:00.000Z	29 \| good	4.875 \| good	21.238 \| good	31.234 \| good	0.336 \| good	0.961 \| good	0.162 \| good
2026-09-30T17:00:00.000Z	31 \| good	4.435 \| good	19.194 \| good	33.773 \| good	0.293 \| good	0.966 \| good	0.155 \| good
2026-09-30T18:00:00.000Z	31 \| good	3.731 \| good	16.228 \| good	33.859 \| good	0.281 \| good	0.932 \| good	0.153 \| good
2026-09-30T19:00:00.000Z	31 \| good	3.064 \| good	12.842 \| good	33.438 \| good	0.268 \| good	0.992 \| good	0.151 \| good
2026-09-30T20:00:00.000Z	29 \| good	3.064 \| good	12.818 \| good	30.855 \| good	0.266 \| good	1.249 \| good	0.152 \| good
2026-09-30T21:00:00.000Z	28 \| good	3.79 \| good	16.715 \| good	29.932 \| good	0.276 \| good	2.152 \| good	0.163 \| good
2026-09-30T22:00:00.000Z	26 \| good	2.723 \| good	11.487 \| good	28.377 \| good	0.341 \| good	5.969 \| good	0.208 \| 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

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Hudson, New Hampshire

Milford, New Hampshire

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Frequently asked questions

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

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

What is the carbon monoxide (CO) 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?

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?