People living in the south of the Netherlands experience most problems with drugs and dealers, according to new research by national statistics office CBS.

The CBS says over one in eight people living in the Noord-Brabant town of Roosendaal experience problems, making it the worst place in the country in terms of drugs nuisance.

Roosendaal is followed by four towns in Limburg plus Rotterdam, in all of which around one in 10 residents aged 15 and over say drugs and dealers cause problems. The CBS polled locals in all towns with a population of 70,000 or more.

Noord-Brabant and Limburg have proportionally more problems with drugs because they are popular with drugs tourists from Belgium and Germany. In 2009, Roosendaal and Bergen op Zoom closed all their cannabis cafes in an effort to stop drugs tourism but that has led to a surge in street dealing, critics say.

The problem has also become worst in Sittard-Geleen since nearby Maastricht introduced a new get-tough policy on drugs tourism. Some 10% of Maastricht locals say drugs are a nuisance, compared with 20% three years ago. By contrast, complaints in Sittard-Geleen have doubled to 10% over the same period.

In Amsterdam, 6.5% of people say drugs are a problem, compared with an average of 5% in larger towns nationwide.

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