Water samples from Yercaud Lake have proven to be contaminated. So better avoid using the waters as far as possible.
When tourists are trying to do adventurous activities like trekking, horse riding etc, consult with local people to get some precautionary tips to do those activities safe.
Some important places like Norton’s Bungalow in Yercaud requires prior permission from concerned officials to visit that historical site, so better plan to get that permission in advance to have a pleasant - hassle free visit.
While travelling to a new destination always maintain distance from unknown locals like tourist guides, taxi drivers etc. Do not be rude or over friendly with them. Always keep a track of the cab drivers information.