Information from: “Personal communication on Urmia Northeastern Neo-Aramaic” . Charles G. Häberl (2016)
20 percent certain, based on the evidence available
"According to the census of 1390/2012, Urmia has 667,499 residents ("1.7% Assyrian"), Sopurghan has 243 residents (an Assyrian village), Solduz has 550,750 (of whom none are apparently Assyrian or Jewish), and Sardrud, today a suburb of Tabriz, has over 35,000K, albeit no information about the Assyrian population (according to one source, fewer than 0.6% of the 1,494,998 inhabitants (census of 1390/2012) of Tabriz are non-Azeri or Persian). That gives a maximum threshold of about 11,347 (Urmia) + 243 (Sopurghan) + 8,970 (Tabriz area) = ca. 20,560 speakers in and around Urmia." Speaker number does not include speakers of the Iraqi Koine (based on the Urmian standard) spoken in diaspora communities.
Iran; diaspora communities in Lebanon and throughout the West
Urmia, Sopurghan, Naqadeh/Solduz, and Sardrud
Information from: “Der neuostaramäische Dialekt von Särdä:rïd” . Younansardaroud, Helen (2001) Wiesbaden: Harrassowitz
Scripts (Writing system)
More on Orthography
Urmia NENA has a modern written tradition, and its development has had positive effects in that it allowed for the management of cultural heritage.
The dialect of Sarda:rid is only spoken in exile (places which are not the homeland of the language), like many other Neo-Aramaic dialects that formerly had a much wider distribution in the Middle East.
Information from: “A Neo-Aramaic Dialect of Kurdistan: Texts, Grammar and Vocabulary” . Georg Krotkoff (1982) New Haven: American Oriental Society
Information from: “The Sound System of Modern Assyrian (Neo-Aramaic)” . Odisho, Edward (1988) Wiesbaden: Harrassowitz
MORE ON VITALITY
After the relocation WWI there was a push to standardize the language in the 1950's (Standard Written Language SWL), which was taught in schools.