During the triathlon event at the 2021 Tokyo Olympic Games, many athletes suffered from vomiting. After an official investigation and water quality testing, it was found that the water contained excessive coliform bacteria, which led to this incident. So how can we avoid such situations? This article gives a brief analysis.

First of all, reliable water purification technology is required to treat polluted water sources. In addition, Water Quality Monitors should be installed at relevant venues for real-time monitoring of harmful substances to ensure their concentrations do not exceed safety standards and cause health hazards.

Most water quality monitoring devices are designed for single-parameter detection. For instance, the WECT-900 Online Coliform Analyzer is specially used to monitor coliform bacteria, while other harmful substances require dedicated testing equipment — no single device can detect all water quality parameters.

Coliform concentration is a key indicator in wastewater monitoring, yet testing this single item alone is not sufficient. Multiple water quality parameters need to be integrated and analyzed via a big data system.

To guarantee the water safety of swimming pools and prevent vomiting incidents, water quality testing alone is far from enough. Firstly, an appropriate amount of water purifying agents should be added to the water, followed by stirring and sedimentation. Water quality can be improved through physical or chemical treatment methods. It should be noted that this method is suitable for small-volume sewage treatment and shows limited purification effects on large-scale polluted water bodies.

For large natural water bodies, an effective way to improve water quality is to reduce pollution discharge into these water sources and strictly supervise toxic and harmful substances that threaten aquatic organisms. This can give full play to the self-purification capacity of large natural water bodies.