Public Private Academic Partnerships are becoming more popular in Denmark to guide companies in becoming more sustainable. The strength is in the interrelationship between the public, private and academic partner in which they interdependently make efforts on reducing their impact on the environment. However, not all the PPAPs in Denmark can show how they are actually achieving this. It is proposed in this research that an environmental impacts calculator like the Milieubarometer could show the member’s achievements in reducing their environmental impacts from direct consumption (i.e. electricity, fuels, water and waste). Interviews are conducted with five companies and the municipality to find out if and how the Milieubarometer can be used among the members of the PPAP. Three of the six interviewees provided data to enter in the Milieubarometer or entered the data in the tool themselves. Due to this, some adjustments for the Milieubarometer are proposed to make it feasible for the members to use. For the PPAP as a whole, the Milieubarometer is proposed as a tool to support internal discussions among the members to show the reductions made in their production related emissions (and with that in the financial costs) and/or to incite competitiveness among each other in reducing their CO2 emissions. Next to that, the Milieubarometer can be used to disclose the effectivity of joint organised environmental impact reduction programs, like a water consumption reduction plan. The Milieubarometer is seen as a way to communicate about environmental achievements, which is necessary for a good interrelationship between the partners of the PPAP as well as to external partners to show how important PPAPs are in reducing the impacts on the environment while still encouraging modernization among the partners.