What is the purpose of the network?

The Acid Gas and Aerosol Network (AGA-Net) provides monthly average concentrations of acid gases and inorganic aerosol composition using UKCEH DELTA^® samplers at 28 sites, as of August 2024. The network objective is to provide a long-term dataset of monthly speciated measurements of acid gases and aerosols that are used to provide information on the long-term rural trends of pollutants that contribute to the acidification and eutrophication of ecosystems within the UK.

In addition to the NH₃ and NH₄⁺ measured by the 28 DELTAs for the NAMN (National Ammonia Monitoring Network), the same systems also measure monthly average air concentrations of gaseous nitric acid (HNO₃), sulphur dioxide (SO₂), hydrochloric acid (HCl, only until 2016) and particulate nitrate (NO₃- ), sulphate (SO₄^2-), chloride (Cl-), sodium (Na+), calcium (Ca²⁺) and magnesium (Mg²⁺) for AGA-Net. 

What is measured?

An extension of the DELTA system at the NAMN sites is used to additionally sample gaseous HNO₃, SO₂, HCl and particulate NO₃^-, SO₄^2-, Cl^-, Na⁺, Ca²⁺, Mg²⁺. 

View data for sites for UKEAP: Acid Gases & Aerosol Network network

Use the dropdown list below to view data for a particular monitoring site.