加拿大魁北克省有关冷却塔和其他蒸发冷却系统运行的新法规的实施，促使军团菌培养结果的大规模收集。为了测试水处理项目的哪些因素在控制军团菌生长方面最重要，将军团菌培养结果与300多个冷却塔的水质结果合并，观察期超过三年。该研究得出结论，该法规，包括采样要求，导致所研究冷却系统中军团菌的存在和水平急剧下降。目前检测到的军团菌水平和当前水温是解释未来许多时期军团菌阳性的重要原因，而氯水平和分散剂施用率是预测未来90至120天军团菌水平的重要原因。 引用:2019年冬季会议，佐治亚州亚特兰大，会议论文

The implementation of new regulations concerning the operations of cooling towers and other evaporative cooling systems in the Canadian Province of Quebec prompted the mass collection of Legionella culture results. In order to test which factors of a water treatment program are most significant in controlling Legionella growth, the Legionella culture results were amalgamated with water quality results for over 300 cooling towers for an observation period greater than three years in duration. The study concludes that this regulation, including the sampling requirement led to a sharp decrease in the presence and level of the Legionella bacteria in the cooling systems studied. Current levels of Legionella detected, and current water temperatures are significant, causal factors in explaining Legionella positivity over many future periods of time, while chlorine levels and dispersant application rates are significant, causal factors in predicting Legionella levels 90 to 120 days in the future.