Independent Councillor John Lyons has said that Northside residents are being "left in the dark" regarding the current state of their water.
Lyons hosted a "productive" public information meeting on Thursday May 2 which gave residents a chance to air their concerns about the quality of drinking water in Coolock.
A recent Freedom Of Information request found that lead levels in the waters there were 12 times above the legal limit.
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Councillor Lyons states that the water presented a "serious public health challenge to the State authorities. Yet, many residents have been left in the dark."
He thanked the forty residents who attended the meeting and said that there would be similar events like this taking place in the coming weeks.
He said: "We have a lot of questions that need answering, as well as the job of raising wider levels of awareness of the issue.
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"So a good bit of work lays ahead of us, but once you have committed people, that’s half the job done."
In a statement to Dublin Live, Irish Water said that they had been "working hard" to improve the quality and supply of their drinking water throughout Dublin and the rest of the country.
They said: "Irish Water has [written] to 38,000 people who we identified as having lead in their drinking water through our metering programme and our drinking water testing programme.
"We continue to write to people as we find lead services as part of our monitoring programmes with detailed information and advice."
They added that the water leaves their treatment plants "free from lead" and said "in the vast majority of cases, lead in the water comes from lead plumbing inside the private property boundary".
According to the company, lead plumbing was widely used in houses in Ireland up until the 1980s.
They estimate that there are 180,000 properties in Ireland with lead plumbing.
Irish Water continued: "As water passes through private connections or internal plumbing made of lead, the lead can be dissolved into the water."
According to the company, if lead is present, the homeowner needs to replace their internal plumbing.
There is a Government grant scheme to help with this replacement and the company said that they had "replaced 22,000 lead service connections through our programmes of work".
Irish Water urges anyone who has concerns about their water to visit their website and homeowners can also check the water quality in their homes by entering their address in here.
