The assessment of the construction of important drinking water sources that meet the standards is an important means of timely discovering problems in water sources

effectively eliminating risks and hidden dangers

and promoting the protection and improvement of water source safety. Based on the national important drinking water source safety assessment system

this article improves the assessment method

and evaluates the safety level of the drinking water source by calculating the construction index for meeting the safety standards of the drinking water source. Taking Henan Province as a case study

the article conducts an evaluation of the construction of safety standards for important drinking water sources during the 13th Five-Year Plan period

diagnoses the “causes”

summarizes the results

and proposes measures and suggestions. The results indicate that:(1) After verification

the improved evaluation method can achieve the diagnosis of key constraint factors and has better applicability.(2) According to the evaluation

during the 13th Five-Year Plan period

the construction index for ensuring the safety of important drinking water sources in the river basin in Henan Province ranks as follows: the Haihe River Basin

the Yangtze River Basin

the Huaihe River Basin

the Yellow River Basin. At the criterion layer

the ranking of construction index for safety assurance standards is water quantity assurance

water quality safety

supervision and management

monitoring and surveillance.Meanwhile

financial support

use of pesticides and fertilizers

monitoring of specific indicators

and information monitoring systems are key limiting factors.(3) After comparison

the level of safety assurance standards for important drinking water sources in Henan Province during the 13th Five-Year Plan period has shifted from the “relatively safe”(89.44 points) to the “safe” Compared with that of the 12th Five-Year Plan period

the safety level of water sources has made a greater leap

and the work has shown a notable results. The main research methods and content of the article can provide clear improvement directions for the safety assessment of important drinking water source areas during the 14th Five-Year Plan period

which will help further ensure the long-term protection and sustainable utilization of drinking water source areas.