Analysis of direct-drinking water quality and its influencing factors in primary and secondary schools in Nanjing City

CHEN Chunjing; GE Ming; ZHENG Yuhong; XIONG Lilin

doi:10.16835/j.cnki.1000-9817.2024065

Volume 45 Issue 2

Feb. 2024

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CHEN Chunjing, GE Ming, ZHENG Yuhong, XIONG Lilin. Analysis of direct-drinking water quality and its influencing factors in primary and secondary schools in Nanjing City[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2024, 45(2): 283-285. doi: 10.16835/j.cnki.1000-9817.2024065

Citation:

CHEN Chunjing, GE Ming, ZHENG Yuhong, XIONG Lilin. Analysis of direct-drinking water quality and its influencing factors in primary and secondary schools in Nanjing City[J]. CHINESE JOURNAL OF SCHOOL HEALTH, 2024, 45(2): 283-285. doi: 10.16835/j.cnki.1000-9817.2024065

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Analysis of direct-drinking water quality and its influencing factors in primary and secondary schools in Nanjing City

doi: 10.16835/j.cnki.1000-9817.2024065

Department of Environmental Health, Nanjing Municipal Center for Disease Control and Prevention, Nanjing (210003), Jiangsu Province, China

Received Date: 2023-11-08
Rev Recd Date: 2023-12-22

Available Online: 2024-03-02

Publish Date: 2024-02-25

Abstract

Abstract

Objective To investigate the quality and influencing factors of direct-drinking water in schools in Nanjing City, so as to provide basis for management of school drinking water. Methods From April to July 2023, direct drinking water equipment from 146 primary and secondary schools were selected from Nanjing City using a stratified random sampling method and tested for colony forming units (CFU) and permanganate index. Mann-Whitney U test was used to compare the differences between groups, and multiple linear regression was used to analyze the influencing factors. Results The CFU and permanganate levels of school direct drinking water in Nanjing City were 1.00(0.00, 15.50)CFU/mL and 0.47(0.26, 0.75)mg/L, respectively. The CFU level increased when the filter replacement time exceeded 3 months and when the water source was piped, while the permanganate index increased when the filter replacement time exceeded 3 months and using activated carbon technology (Z=-2.21, -3.92, -2.31, -8.45, P < 0.05). The results of multiple linear regression analysis showed that the replacement time of filter element exceeding 3 months was positively correlated with the CFU level, and the process type involving activated carbon, a laid pipe network and a filter replacement time exceeding 3 months were positively correlated with the permanganate index(β=167.08, 0.32, 0.35, 0.11, P < 0.05). Conclusions There are certain problems with the water quality of primary and secondary school direct drinking water in Nanjing City. Schools should promptly replace the filter and maintain the drinking water equipment to ensure the hygiene and safety of campus water quality.
- Drinking,
- Bacteria,
- Permanganate index,
- Regression analysis,
- Environmental monitoring,
- Student health services

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References(15)

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