Which of the following specimens is NOT typically collected for forensic testing?

In forensic testing, the collection of various specimens allows for the analysis of evidence related to criminal investigations and legal matters. Water, while it can be a valuable specimen in certain circumstances, is not typically collected for standard forensic testing in the same way that biological samples such as saliva, teeth, and hair are.

Saliva can provide DNA evidence as well as other biological markers that can be crucial in criminal cases. Teeth are often examined for dental records in identifying individuals or collecting biological evidence. Hair, particularly when it includes the root, can also provide DNA and has been widely used in forensic science to link a suspect to a crime scene or victim.

Water samples may be collected in specific contexts, such as in cases involving drowning or contamination, but these instances are more exceptional. Therefore, among the options given, water is not a standard specimen collected for forensic analysis in the routine sense, making it the correct answer to the question.