As a result, it will be forced to reduce its maximum airport charges this year by a small amount.
In a report published today, the Commission says the airport fell short of the target for security queuing times for the first five months of this year.
The Dublin Airport Authority must ensure that passengers do not spend more than 30 minutes queuing at a security checkpoint.
On 15 May 2010, passengers waited for 34 minutes in the queue, and on ten other dates the wait was recorded as being between 20 and 30 minutes.
The airport also fell slightly short of the target for passenger satisfaction with phone and internet facilities at the airport for the same period.
A spokesman for the Commission for Aviation Regulation said the amount of reduction in the maximum airport charge was minimal - around 1 cent per passenger - but that this was the first time airport charges were being partly based on quality standards.
In a separate report on passenger complaints, the Commission noted a 25% reduction in the number of valid complaints in 2009 compared with 2008.
There was a 33% decrease in complaints about cancellations (from 304 to 204), and a 14% drop in complaints about delays (from 70 to 60) , though complaints about denied boarding were doubled ( from 20 to 44 complaints).
The Commission welcomed the overall decrease in complaints, saying it suggested fewer incidents of non-compliance with regulations by air-carriers.
