What is the purpose of the network?

The National Ammonia Monitoring Network (NAMN) provides gaseous ammonia concentrations (NH₃) monthly at 113 sites (94 using UKCEH ALPHA^© passive samplers, 28 sites using UKCEH DELTA^© active samplers) as of August 2024. A subset of 9 sites has co-located samplers to correct on an annual basis the ALPHA measurements against the DELTAs.

The network objectives are to quantify temporal and spatial changes in air concentrations and deposition in ammonia (NH₃) and ammonium (NH₄⁺) on a long-term basis, and to provide a baseline in the reduced nitrogen species (NH₃ + NH₄⁺), which is necessary for examining responses to changes in the agricultural sector and to verify compliance with targets set by international agreements.

What is measured?

Gaseous ammonia (NH₃) and ammonium (NH₄⁺).

View data for sites for UKEAP: National Ammonia Monitoring Network network

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