Westerlaken Foundation / Yayasan Bali Bersih did water quality test every week since 26 January 2022. The results of this study expected to provide information about the condition of water quality at Petitenget Beach and Mertasari Beach to the coastal community, NGOs (Non-Governmental Organizxations), and the government. Considering that bad water quality effects marine life and with that humans that consume marine food.

   This research was conducted using MPN (Most Probable Number) Method with following quality standards from Pergub bali no 16 Tahun 2016 tentang Baku Mutu Lingkungan Hidup dan Kriteria Baku Kerusakan Lingkungan Hidup.

   This research is permitted by government regulations by research permit number B.30.070/685.E/IZIN-C/DPMPTSP.