WELL-heeled residents living in the country's most expensive suburb are throwing money away and lie at the bottom of the recycling league.
A survey from the waste company Greyhound says people living in Dublin 4 recycle just 23.7pc of their household waste – lower than anywhere else.
And top of the league table for recycling are people living in the Dublin 3 suburbs of Clontarf, North Strand, Fairview and East Wall. Some 28.1pc of all household waste was recycled in these areas, Greyhound said.
Dublin 4 includes Ballsbridge, Donnybrook, Sandymount and Ringsend and is home to some of the most expensive properties in the State. Almost 30 have been sold in Dublin 4 this year for more than €1m each.
Yet many residents don't recycle their household waste, despite it being cheaper than disposing of it in black bins, which incur the highest charges.
The survey shows a tale of two cities, with the most diligent recyclers and composters found living north of the River Liffey.
The study of recycling rates across nine different postcodes in the capital shows the average amount of waste sent to the green bin, which covers paper, plastics and food tins, was 27pc.
Another 18pc went into the brown bin, which is used to compost food and garden waste.
Greyhound analysed the contents of bins collected in Dublin City Council and South Dublin County Council areas and found that the three best areas for both green and brown bin usage were on the northside, while the worst for using green bins was Dublin 4 and for brown bins it was Dublin 8.
The survey also shows:
* Dublin 3 tops the poll for the green bin, followed by Dublin 1 (28pc), Dublin 9 (27.8pc) and Dublin 5 (27.6pc).
* The worst-performing areas were Dublin 4, followed by Dublin 7 (24.1pc) and Dublin 8 (24.9pc).
* For the brown bin, the best was Dublin 5 (22.7pc) followed by Dublin 3 (22pc), Dublin 9 (21.9pc) and Dublin 4 (19.9pc).
* The worst were Dublin 8 (13.3pc), Dublin 2 (15.3pc), Dublin 1 (16.5pc) and Dublin 7 (18.2pc).
Greyhound chief executive Michael Buckley said: "It is extremely interesting to see the differences in the recycling rates right across Dublin, with Dollymount and Ballybough out-performing Donnybrook and Ballsbridge."
Using the brown and green bin was cheaper, he added, and would result in savings.