December 2021: Check out the pages added or updated for Weather Warnings, Sea Area Forecasts, Marine Warnings & Sea Crossings Forecasts.

Air quality in Howth

PurpleAir have created an air quality monitoring network built on a new generation of "Internet of Things" sensors.

A PurpleAir member in Thormanby Lawns, Howth has an air quality monitor and provides the data to PurpleAir. The live measurements from this station are shown below. These measurements have been converted to use the Environmental Protection Agency's Air Quality Index for Health (AQIH) which is an index number from one to ten that tells you what the air quality currently is and whether or not this might affect your health (see table below measurements for details of what the index numbers mean).

Period Concentration Index Classification           
Real-Time 6.56 ug/m3 1 Good
Currently 6.28 ug/m3 1 Good
Last 30 min 9.18 ug/m3 1 Good
Last hour 11.96 ug/m3 2 Good  
Last 6 hours 21.7 ug/m3 2 Good  
Last 24 hours 19.72 ug/m3 2 Good  
Last 7 days 13.32 ug/m3 2 Good  
     Latest measurement from: 25/01/2022 14:56   Sensor: Purpleair #91889
Classification Index pm2.5 The health effects should be based on 24 hours average values only.
 Good  1 < 11 μg/m3 Enjoy your usual outdoor activities
2 < 23 μg/m3
3 < 35 μg/m3
 Fair  4 < 41 μg/m3 Enjoy your usual outdoor activities
Adults and children with lung or heart problems, who experience symptoms, should consider reducing strenuous physical activity, particularly outdoors
5 < 47 μg/m3
6 < 53 μg/m3
 Poor  7 < 58 μg/m3 Anyone experiencing discomfort such as sore eyes, cough or sore throat should consider reducing physical activity, particularly outdoors.

Adults and children with lung problems, and adults with heart problems, should reduce strenuous physical activity, particularly outdoors, and particularly if they experience symptoms.
People with asthma may find they need to use their reliever inhaler more often.
Older people should also reduce physical exertion.
8 < 64 μg/m3
9 < 70 μg/m3
 Very poor  10 > 70 μg/m3 Reduce physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat.
Adults and children with lung problems, adults with heart problems, and older people
should avoid strenuous physical activity.
People with asthma may find they need to use their reliever inhaler more often.
Visit these websites Regional Air Quality site & Purpleair sensors where you can find a wealth of information

The map below from PurpleAir uses the US Air Quality Index (AQI). It shows the location of the various sensors and their current readings. You can zoom in and out of this map.