Abstract: The present invention relates to the provision of a portable kit that permits reliable and quantifiable analysis of trihaloamethanes and haloacetic acids within drinking water samples utilizing a hand-held (portable) fluorescing detection instrument for simultaneous measurements of such species. With the necessity to chlorinate drinking water to remove harmful bacteria and other potential toxins, trihalomethane and haloacetic acid byproducts are generated during such a disinfecting procedure that may harm humans after consumption as well due to highly suspect carcinogenicity. A reliable manner of measuring such drinking water supplies for such disinfectant byproduct levels is highly desirable, particularly through the utilization of a relatively inexpensive analytical instrument for such a purpose.