The questionnaire that was be used in this study is modified from the Baseline, Descriptive and Time-Activity
Questionnaire used in NHEXAS-Arizona study [5.6]. The questionnaire was in in Malay version since Bahasa
Malaysia is our national languages and understood by most of our citizens. A total of 106 residents from Kampung
Sungai Sekamat, Kajang were selccted using sample size formula by Kirkwood and Sterne equation. Pre-testing was
conducted on 16 households in housing area, approximately 10km from study area. The Cronbach’s alpha of 0.86
was obtained. Tap water samples were taken in a 250 mL high-density polyethylene (HDPE) bottle was used to
detect pollutants in water [6]. In-situ measurements (physicochemical characteristics namely pH, temperature,
conductivity, total dissolved solid and turbidity) were taken during the tap water sampling.