Tingkat Kesuburan Perairan Desa Mantang Baru, Kecamatan Mantang, Kabupaten Bintan

The village of Mantang Baru which is lcoastal area, located in the district of Mantang. The objective of this study was to analyze the trophic status of the Mantang Baru village, subdistrict of Mantang, Bintan regency. The reserch was conducted by survey method, sampel observation using random sampling at 15 sampling points. Analysis of trophic levelwas used the TRIX index. The results of supporting parameters namely physics, chemistry, and biology of he water have met the water quality standards based on PPRI no.22 years of 2021 attachment of 8 the expect NO 3 and PO 4. The results of the measurement of chlorophyll-a content in the waters of the village of mantang baru at high t ide was 0,094µg/L at low was 0,089µg/L, the resutls of water based on TRIX at high tide ranged from 5,16 mg/L at low tide ranged from 5,87mg/L. Based on category TRIX the waters of the village of Mantang Baru are classified as eutrophic waters.