Monitoring is an important activity in state management of environmental protection. In Article 3 of the Law on Environmental Protection No. 72/2020/QH14 issued on November 17, 2020, "Environmental monitoring is defined as the continuous, periodic, irregular, systematic monitoring of environmental components and factors affecting the environment and waste. This allows to assess of the current state of the environment the developments of the environmental quality and the negative impacts on the environment. Therefore, monitoring is an important activity in state management of environmental protection.