Aquaculture development in recent years has contributed to enhancing the income and improving the livelihoods of local people, contributing a significant part to the country’s economic development. This paper presents the first observation results of aquaculture water quality at five aquaculture ponds in Phuc Tho district, Hanoi city in 2023. The results showed that pH values ranged from 7.01-7.88; total suspended solids (TSS): 15-49.5 mg/L; ammonium: 0.01-3.06 mgN/L; nitrite: 0.14-0.42 mgN/L; nitrate: 0.71-2.16 mgN/L; total nitrogen: 2.95 to 4.75 mgN/L; phosphate: 0.02 – 0.87 mgP/L; total phosphorus: 0.14-1.48 mgP/L; dissolved silica: 0.09-3.03 mgSi/L; total coliforms: 900-13,700 CFU/100 mL; and E. coli: 200-1.800 CFU/100 mL. At most sites, dissolved oxygen, total suspended solids, total nitrogen, total phosphorus, total coliforms and E. coli exceeded the permitted values of the Vietnam Technical Regulation QCVN 08:2023/BTNMT column B which regulates the water quality of aquacultural ponds. Besides, the results of the E.I. calculations (1.87) showed that most of the aquaculture ponds were in Dystrophy states. High eutrophication level together with high microbial contamination may affect the fishery productivity and quality in Phuc Tho district, Hanoi city. As a result, it is needed to propose measures to handle and overcome the current situation and to monitor the water quality regularly to ensure public health.