The number of people waiting without hospital beds at Letterkenny University Hospital last month has fallen by 16%.
There were 243 patients on trollies at LUH in the month of June 2019.
The figure is down 16% from 291 patients at the same time in 2018. The monthly total was 393 in June 2017.
Trolley figures were up 7% nationally last month, as 7,392 admitted patients were forced to wait without hospital beds.
Cork University Hospital, South Tipperary General Hospital, Sligo University Hospital, University Hospital Waterford and Tallaght University Hospital all recorded their worst-ever June for overcrowding.
The Trolley Watch figures were published by the INMO. General secretary Phil Ní Sheaghdha said: “Our members tell us that there’s no longer a summer respite when it comes to overcrowding. Summer 2019 is as bad as winter was five years ago. Understaffing is driving year-round unsafe conditions.
“The government and HSE need to get a handle on this problem. That means implementing the Safe Staffing Framework and making real progress on Sláintecare. Without serious investment and reform, this problem will continue to spiral, with patients and frontline staff paying the price.”