A few errors on the original list that have been rectified by TheBeerNut and irish_goat.
A full list of the NI breweries can be found on my page.
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Antrim - Hilden 1981
Down - Whitewater 1996 - 25% owned by C&C - independence conversation continues
Fermanagh - Fermanagh Beer Company 2010 (still in production)
Derry - Walled City 2014
Armagh - Station Works 2014 (based on the Armagh side of the river but classed as a Newry premises (Down) and as it's your list, you decide what's independent enough or not)
Tyrone - Baronscourt 2018 (Pokertree and Red Hand have gone)