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. For the measurement of
pH and temperature, CyberScan pH 310 was used. Conductivity and total dissolved solid (TDS) were measure
simultaneously using HACH SensionTM5 conductivity meter.