You should keep your tap water temperature set at 120 degrees Fahrenheit (the "warm" or "low" setting on your water heater). For a child or senior citizen, a tap water temperature between 95 and 100 degrees Fahrenheit is suitable.  Never leave a small child alone in the tub where he or she can accidentally turn on the hot water.

 

How to test your water temperature:

1. Run the hot water for five minutes.
2. Put a reliable thermometer that registers at least 150 degrees under the water stream.
3. If your water is more than 125 degrees, lower the thermostat on your water heater.  If you can't find the temperature controls or have any questions, call a qualified contractor or your landlord for help.