A sustainable mass management process includes many aspects and spans across numerous laws, rules, and ordinances. Thereafter, this external monitoring is limited to the focus areas; selected Swedish municipalities, the inspirational example of the city of Helsinki, as well as laws, rules and ordinances regarding storage, classification of masses and general important rules that operators should be aware of. According to Miljöbalken (1998:808), a significant part of mass management is classified as a C- operation and requires a permit for environmentally hazardous activities. According to current environmental legislation, the operator is required to carry out self-inspection. Permits for mass management are sought from the competent environmental authority, which then assesses the suitability of the activity for the location in question (Riksdagen, u.d.).  In the monitoring of the environment, four questions are answered to inspire and develop municipalities mass management work. These concern which rules one should know to succeed with sustainable mass management work, how different municipalities work process looks like in mass management, what the funding basis looks like for municipalities regarding mass coordinators and storage locations, as well as calculations that show how much has been saved trough sustainable mass management work.