Blue Activity

Cooling Water Treatment. Powered by Nature.

Sustainable water treatment. 

Blue Activity replaces toxic biocides with functional microorganisms in the treatment of cooling water for open evaporative cooling systems.

  • Founder:
    Michael and Lars
  • Mission:
    Blue Activity leads to more efficiently operating cooling systems, reduced water and energy consumption — and significantly lower operating costs.

  • Cooling Water Treatment. Powered by Nature.

    Lars Havighorst

    "Venture Stars' belief in us is something we never take lightly. Standing behind a disruptive idea before the world is ready to embrace it — that demands real vision. We honor that commitment in everything we do."


    Lars Havighorst
    Founder / CEO of Blue Activity
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