Characteristics of the aquatic environment as a basis for brackish water pond development in the Cilacap Regency Area

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The coastal of Cilacap is a large aquaculture area for vannamei shrimp (Litopenaeus vannamei). The purpose of this study is to determine the concentration of water quality in borewell and pond as the basis for brackish water development. The research method used a descriptive method by describing the sample results compared to environmental quality standards for biota based on Government Regulation Number 22 of 2021. Sampling was carried out monthly during May-July 2022 at 3 location. Observations were made on water physico-chemical parameters (temperature, pH, salinity, dissolved oxygen, BOD, nitrite, nitrate, ammonia and phosphate). Based on the analysis, it is known that the water quality of the borewell varied, namely temperature (29.75±0.96°C), pH (7.74±0.26), salinity (15±6.42%o), DO (6.52±2.83) mg/l, BOD (2.48.±1.67) mg/l, nitrate (0.43±0.38) mg/l, nitrite (0.02±0.02) mg/l, ammonia (0.46±0.30) mg/l and phosphate (0.13±0.10) mg/l. As for the pond water quality parameters, the temperature values were (30.14±1.46°C), pH (7.94±0.22), salinity (12.22±6.02%o), DO (7.58±1.30) mg/l, BOD (26.10±24.83) mg/l, nitrate (1.86±1.30) mg/l, nitrite (0.09±0.15) mg/l, ammonia (1.07±0.30) mg/l and phosphate (0.128±0.098) mg/l. Based on Government Regulation Number 22 of 2021 it is concluded that the water conditions are still suitable for the life of aquatic biota and good enough for fishery development.