Current situation and countermeasures of landscape water sanitation in Shanghai International Resort

Background As society's demand for landscape water bodies increases, people are more likely to be exposed to landscape water bodies; therefore, the sanitary quality of landscape water has attracted much attention.

Objective This study aims to understand the landscape water sanitary management and water quality in a tourist resort, investigate potential sanitation hazards, and propose improvements.

Methods From July 26th to August 8th 2018, a questionnaire survey was conducted on the sanitary management, water treatment, and equipment of landscape water in Shanghai International Resort. Nine landscape water samples and two source water samples of Shanghai International Resort were collected and detected for 36 indicators including total coliforms, heat-resistant coliforms, chromaticity, turbidity, and pH. The 9 landscape water samples were additionally tested for Legionella pneumophila, and 5 landscape water samples from landscape spray areas were additionally tested for total air bacteria.

Results Four landscape water bodies were reported being purified and disinfected, 3 landscape water bodies were only purified, 1 landscape water body was only disinfected, and 1 landscape water body was subject to water softening process. Five landscape water areas did not have specific places for disinfectant storage. Six landscape water bodies had daily water quality inspection records. The total number of bacteria in the 5 spray areas was 2-3. No Legionella pneumophila was detected in the 9 water samples. Free residual chlorine content in 9 water samples, monochloramine content in 3 water samples, and the total number of colonies in 3 water samples exceeded the related national standards. Total coliforms and heat-resistant coliforms were positive in 2 water samples. The overall qualified rates of the 9 water samples were 83.3%-97.2%.

Conclusion Some landscape water bodies in the selected resort area are polluted, and the source water quality of landscape water bodies is good. Attaching great importance to the landscape water sanitation status, improving the construction of legal systems, strengthening information construction, increasing water quality testing and supervision, as well as exploring joint supervision models are proposed to protect the health of tourists and the public.