In recent years, around 20 corruption complaints have been filed per year. However, many cases go unreported.
Johan Sörensson, who works at the Agency for Public Management, says municipality-owned companies are most vulnerable. He says municipalities could improve the situation if they went public with any corruption in their own communities.
"The point with going public, if you discover corruption, is that it deters others. It scares others from committing the same crime," he tells Swedish Radio.
The agency has surveyed how municipalities and counties view corruption. They asked civil servants and politicians if they believe corruption exists and whether the question is discussed in their daily work.
Most corruption complaints are connected to construction and housing, and most are filed by journalists and private individuals.