A US audit has found many of Iraq's reconstruction projects are falling apart and oil production is still below pre-war levels.
However, Washington said it was Iraq's responsibility to maintain its infrastructure.
The report describes widespread waste, decay and deterioration.
Inspectors said measures to keep rebuilt infrastructure operating were not carried out by the Iraqis. Problems were found complying with international standards and construction sites did not meet safety objectives.
The report also said that electricity supply in Baghdad was down to less than seven hours a day on average, and only 15 out of 142 planned health care centres had been completed.
At Baghdad airport, it said, 10 out of 17 new generators were no longer working because they had not been maintained properly.
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