Social Democrats' co-leader Roisin Shortall is among a group of politicians who have raised questions about the health impacts of 5G technology in the Dail over the past year.
A government minister, as well as TDs from Fianna Fail and Sinn Fein, also raised questions about the wireless technology.
Ms Shortall, Fine Gael junior tourism minister Brendan Griffin, Sinn Fein TDs Pearse Doherty and Brian Stanley and Fianna Fail deputies Robert Troy, Niamh Smyth and Pat Casey, who is now a senator, submitted parliamentary questions (PQs) about health concerns surrounding 5G.
The technology, which will significantly increase mobile broadband speeds, has been the subject of unfounded claims that it affects people's health and has been falsely linked to the spread of Covid-19.
Experts around the world agree there is no evidence that 5G causes cancer or any other illnesses.
Mr Griffin asked Communications Minister Richard Bruton about the safety of 5G in two PQs last year.
"We would submit PQs on all issues to get the official government position to send back to people," he said, adding that he has no concerns about the technology.
Mr Doherty asked OPW minister Kevin 'Boxer' Moran last May whether a public health assessment had been carried out in advance of the installation of 5G technology at Buncrana Garda Station in Donegal.
He was told there was no such proposal to install it.
Mr Doherty said last week that he had "no health concerns" about 5G.
Mr Troy said he submitted a question "in reply to constituency queries to ascertain the official departmental reply".
Mr Casey said he asked Mr Bruton for his plans to "quell the health concerns regarding the 5G rollout" last October on behalf of a constituent.
He too said he has no concerns about 5G.
Ms Shortall, who did not respond to queries, asked Mr Bruton last July how his department had established there are "no discernible health implications" from the 5G rollout.
Ms Smyth and Mr Stanley, who also submitted questions about 5G's health implications in the Dail last year, also failed to respond to queries.