9,439 hospital patients were left waiting for beds over the past month due to overcrowding.
That's the highest ever number recorded in July.
According to the Irish Nurses and Midwives Organisation, the figures are 33% higher than the same month last year.
Here are the worst affected hospitals since the start of the month:
- University Hospital Limerick: 1,293
- Cork University Hospital: 1,079
- University Hospital Galway: 707
- University Hospital Waterford: 590
- Mater Misericordiae University Hospital: 560
INMO Director of Industrial Relations, Tony Fitzpatrick, says the overcrowding is being driven by understaffed facilities and a lack of beds.
However, he says some are nearly becoming desensitised to the crisis at hand.
Mr Fitzpatrick says "it really needs to be tackled head on. We need a plan now for the winter, because if we have this level of overcrowding in July we're heading into the worst winter on record."
The HSE, which does not have its July figures validated yet, has responded to the numbers.
It says "Acute hospitals are continuing to see a year on year increase in the number of patients requiring treatment and care.
"The HSE regrets that any patient should have to wait for admission from ED to a hospital ward. All patients admitted from ED remain under the care of our ED staff until they can transfer to the appropriate hospital ward."