This research has purpose to know water quality in the Kapuas River based on parameter in physics, chemistry and biology. Form of this research is descriptive with survey method. The result of sample test in three observation locations shows that the water is worth to be used based on the physics parameter (TDS, TSS and temperature) meanwhile, based on parameter in chemistry (DO, BOD, COD, and pH) and biology (Total Coliform), the water from those locations is unworthy to be used based on second class water standard according to PP 82 in the year of 2001 about water allocation can be used for infrastructure/water recreation facilities, freshwater fish breeding, stockbreeding, irrigating the crop, and/or other used that required water quality for the same usefulness. The result of the research on water quality used in arranging the device of learning on material for tenth grade students of senior high school about environmental contamination. Validation of the learning devices is done by 5 people as validator. The learning devices is valid ( RPP about 3,95, LKS about 3,92 and the booklets about 3.27) and it is worth being used for supporting the learning about environmental contamination material
