Hazardous waste 2013 2014 2015 2016 2017 2018
Metal sludge (tons) 537 563 805 767 838 915
Oil for recycling (tons) 295 370 360 419 433 352
Other types of toxic waste (tons) 1,846 1,971 2,304 2,171 2513 2521
Total hazardous waste 2,678 2,904 3,469 3,357 3,785 3788 (1)
KPI, Hazardous waste/Value added (kg/SEK M) 131 126 129 119 (2) 122 119(2)
             
(1) For comparable units. Total amount of hazardous waste was 3,861 (tons) including units acquired during the year.
(2) For comparable units. Total amount of hazardous waste/value added amounted to 120 kg/SEK M, including units acquired during the year.