The unknown liquid "water" is not specified as distilled or non-distilled. With the addition this year of a conductivity tester, this becomes a needed clarification.
The type of water does not need to be specified for Crime Busters, it will be up to the event supervisor. There is no specific use for the conductivity tester in Crime Busters. The conductivity tester is listed in the kit for the ease of teams to have 1 kit that can be used for all Chemistry events without having to take anything out or add something for a specific event. Teams will use some items and won't use other items depending upon the event.