Today I stumbled across this incredible 2017 story from The Guardian. Water companies in the UK were using dowsing rods to find leaks in water pipes:
Ten of the 12 water companies in the UK have admitted they are still using the practice of water dowsing despite the lack of scientific evidence for its effectiveness.
Dowsers, or water witchers, claim that their divining rods cross over when the presence of water is detected below ground. It is regarded as a pseudoscience, after numerous studies showed it was no better than chance at finding water.