We are surrounded by chemicals, in everything from shampoo and clothes to tarmac and concrete. A sound management of chemicals is needed to avoid harm on humans or environment. To obtain this, chemicals may have to be substituted, new methods chosen or waste water treatment improved. To decide what action needs to be taken, knowledge about the chemicals is a must. To safeguard the environment, knowledge about the ecosystem risking exposure is also important. We assess the environmental hazard of chemicals and the risk for the for the environment. We have experience from developing criteria for suppliers and finding alternatives with less environmental impact.