Today I finished my shower monitoring project. To monitor the water usage each time we take a shower we need to do one thing: weigh ourselves. When we step on the scale it will know who takes a shower based on the weight. Then it will measure and capture the water usage for 15 minutes.
This is not extremely accurate because after stepping on the scale it will consider ALL water usage as shower water usage ;-) Overall it gives you a good idea and it’s cheap to implement.
Details can be found on the Water monitoring page.