Evaluation of Groundwater Quality in Hau Giang Province, Vietnam

Authors

The study was carried out to assess groundwater quality in Hau

Giang province in the period of 2017-2019. Groundwater quality

data was collected at 8 monitoring stations, each with 3 boreholes

with the frequency of two times per year. Groundwater samples were

analyzed for criteria of pH, Fe, SO4

2-

, N-NO2

-

, N-NO3

-

, hardness, N-

NH4

+

, Cl- and permanganate. Each parameter was evaluated using

national technical regulation on groundwater quality (QCVN 09-

MT:2015/BTNMT). The results showed that the indicators of pH,

SO4

2- and N-NO3

- did not exceed the allowable thresholds of the

regulation; Fe, N-NO2

-

, N-NH4

+

, Cl- and permanganate sometimes

exceeded the permissible limits by 1.4-2.4, 1-3.43, 1.04-2.99, 1.01-

4.1, 1.25-16.41, 1.72-4.07 times, respectively. The main causes of

groundwater quality degradation could be from agricultural

activities, and geological characteristics. More attention needs to be

paid for managing the groundwater quality in Hau Giang province.