Using rainwater for showering is generally safe, and there are benefits to using rainwater for this purpose. Rainwater is soft, which means it is better for skin and hair than hard water. However, there are also quality concerns when using rainwater for showering. If rainwater is left stagnant in barrels, it can develop algae, which can cause health problems. Pre-treatment methods, such as using gutter screens, first flush diverters, screens over barrel inlets, and filters, can keep collected rainwater clean and prevent the growth of harmful bacteria. Additionally, bleach can be used to treat rainwater in barrels. It is important to note that the rules and regulations regarding rainwater harvesting vary depending on location. Overall, while there are some quality concerns, the benefits of using rainwater for showering make it a viable option for those interested in sustainable living practices.