Air Quality in Merrimack, United States

Drizzle
17.9°C · 49.1% humidity
17.9°
Feels 17.9°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
24 5pm
24
24
21 8pm
25
25
25 11pm
25
25
25 2am
25
27
27 5am
27
27
25 8am
24
24
24 11am
24
24
24 2pm
24
24
AD 728×90

Air Quality Index Trend

46h · 1 stn

Merrimack's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Merrimack is 1.0× the WHO annual guideline of 5 µg/m³.

49.1%
Humidity
49.6 km/h
Wind W
1019.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
21
5.06 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Merrimack?

Temperature & Precipitation

PM2.5 Trend

46h · 1 station
PM2.55.06 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250

What is the 7-day forecast for Merrimack?

05-29
17.9° 9.2°
1.0 mm
05-30
24.1° 8.1°
9.37 mm
05-31
24.5° 9.1°
0.13 mm
06-01
23.6° 8.0°
06-02
19.1° 11.6°
0.13 mm
06-03
28.0° 14.5°
06-04
22.2° 18.0°
0.88 mm
Both models agree Avg diff: 4.7°C

Where are air quality stations near Merrimack?

34
Londonderry - Moose Hill, New Hampshire, USA
9.2 km PM2.5: 8.2 µg/m³
46
Londonderry - Moose Hill, New Hampshire, USA
9.2 km PM2.5: 11.0 µg/m³

What cities are near Merrimack?

22 Nashua 25 Derry 25 Derry Village 25 Dracut 25 Methuen 25 Lowell 25 Chelmsford 22 Westford 25 North Andover 25 Tewksbury
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:11 UTC.