Introduction Public health and well-being outcomes are intimately connected with the health of our planet. Climate change has numerous far-reaching effects. Managing and mitigating these risks to human health presents one of the next challenges to global healthcare. The current usage of planetary resources is unsustainable. Surgical procedures are particularly resource-intensive, often utilising vast amounts of single-use consumables, like water. In the last 100 years global usage of fresh water has increased six-fold and continues to rise by 1% year on year. It is well established that initial hand sterilization and maintenance of hand sterility during the surgical list are essential for preventing hospital-acquired infections and associated morbidity and mortality. This study aims to estimate the current daily water usage of two typical hand surgery lists from a District General Hospital in North Wales, to determine potential water savings by switching exclusively to an alcohol-based hand rub for subsequent scrubs, in line with current national guidelines. Methods Observational study estimation of water consumption from a temperature-controlled manual tap required using a 1 litre volumetric jug where the time taken to fill was recorded. Three separate observational samples were taken, and a mean was calculated. This mean determined the amount of water dispensed from the tap in a standard 3 min scrub and subsequent 1 min scrub. Two different theatre schedules were analysed: 1. A trauma list (five cases) and 2. A higher volume minor elective procedure schedule (16 cases), in this case a wide-awake local anaesthetic no tourniquet (WALANT) carpal tunnel release (CTR). Results Each case regardless of procedure had approximately three persons scrubbed. 20.57L of water is used for one person to scrub for 3 mins and an extra 6.8574L for each subsequent 1 min scrub. Therefore, current daily water consumption could reach 143.99L during the major hand trauma list and 411.4L during a high-volume carpal tunnel release list. Conclusion Simply following current guidelines by switching to alcohol-based hand rub just for subsequent scrubs could reduce water consumption by 57.2% for hand trauma lists and 70.2% for high-volume CTR lists.