Local TD Michael Fitzmaurice is accusing the state of a "cover up" over a high-profile case on alleged pollution at a Kilkenny farm.
The pollution has affected livestock and foliage at the farm of Dan Brennan since 1980, though it's claimed it started to recover after a nearby brick factory closed down in 2008.
Symptoms in the herd included bone being soft enough to cut with a knife, and bone material growing in lungs and arteries.
Deputy Fitzmaurice says Mr. Brennan was accused of being a bad farmer in initial investigations - but reports that suggested the problem lay outside his farm were ignored.
Deputy Fitzmaurice was one of a number of TD's who made a cross-party demand in the Dáil for a full, independent inquiry.