Abstract
This paper represents some aspects on the environmental quality of coastal areas in Ninh Thuan province. Results of two surveys (performed in July 2013 – dry season, and February 2014 – rainy season) showed that in water environment, Dissolved Oxygen – DO values were relatively high (always >5mg/l). Values of Total Suspended Solids - TSS, nutrients ammonia, nitrite, nitrate, phosphate, silicate and heavy metals Pb, Hg, As were in the narrow ranges and always were lower than acceptable values for aquatic life protection. In generally, values of nutrients ammonia, nitrite, nitrate và phosphate were usually lower in Nha Trang bay but higher in coastal area of Phu Yen. In dry season, values of TSS, nutrients nitrate, silicate were higher than those in rainy season, while Hg were contrary.
 In sediment, concentrations of organic Carbon were suitable for benthos. Concentrations of Phosphorus and Nitrogen in samples were not high so it does not affect aquatic life. In generally, the quality of the sediment in Ninh Hai was better than that of the Ninh Phuoc. Concentrations of Phosphorus and Nitrogen in sediment were higher in rainy season.
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