Site of Special Scientific Interest

"SSSI" redirects here. For other uses, see SSSI (disambiguation).
This article is about Sites of Special Scientific Interest in the UK. For Hong Kong SSSIs, see Site of Special Scientific Interest (Hong Kong).
Arlington Reservoir, a 99.4-hectare (246-acre) biological SSSI in Arlington, East Sussex
Long Mynd, view up Ashes Hollow towards Pole Bank

A site of special scientific interest (SSSI) in Great Britain, or an area of special scientific interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle of Man. SSSI/ASSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in the United Kingdom are based upon them, including national nature reserves, Ramsar sites, Special Protection Areas, and Special Areas of Conservation. The acronym "SSSI" is often pronounced "triple-S I".[1]

  1. ^ Philip Wilson. "triple SI". Tree Terms. Retrieved 8 March 2019.