The CSS file did not download correctly, the screen reader does not support CSS, or your version of Internet Explorer is too
old for this website.
To get the best possible experience using our website, you should upgrade to a newer version of Internet Explorer, or use
other browser alternatives. If you are using a computer at work, contact your IT administrator.
Content of heavy metals constitutes the average amount of heavy metals in dry weight sewage sludge. The average is weighted against the amount of sewage sludge for the different treatment plants for the country as a whole.