Smart sensor device for detection of water quality as anticipation of disaster environment pollution

Population growth and the pace of development have resulted in environmental degradation, especially the quality of surface water or groundwater. This situation occurs in urban areas with large populations, and / or downstream. Raw water quality tends to decline; this condition becomes the central issue in the provision of clean water in Indonesia. In many places, the quality of ground water and river water as drinking water healthy for people less qualified, even in some places is not worth drinking. These conditions forced the poor still use the water for their daily needs so that it can have an impact on their health. Potable water has a certain standard indicators, namely: indicators of physical, chemical, and biological. The parameters used to determine these indicators include the degree of acidity (pH), total dissolved solids (TDS), transparency or turbidity and water temperature. This study makes a water quality detection tools by using four parameters above. The threshold parameter pH = 6.5 − 8.5, TDS <1000ppm, turbidity <5 NTU, and the water temperature = ± 3C than the air temperature. Precision test of sensors has been carried out and each sensor has a good precision, with an average percentage error for sensor pH = 1.46%, sensor TDS = 1:09%, turbidity sensor = 2:00%, and a water temperature sensor = 0.83%. Determination of water quality using fuzzy logic, divided into three categories: water quality is good, less good and bad. The experimental results in some places of the water source was obtained detection of water quality accurately: (1). Water quality is good for water from the local government water company of Surabaya and Malang; mountain spring water, wells water in Malang; and aqua water, (2). Water quality is less good for wells water in Surabaya, and (3). Poor water quality for tap water mixed with soap.