120 students from Cita Hati junior high school Surabaya visited ECOTON to observe water quality in Surabaya river. They use the water insect / BIOTILIC method to determine the quality of water in the Surabaya river. The BIOTILIC method is known as a simple method of measuring water quality because it has 4M properties (Cheap, Easy, Bulk, Benefit).
For 1 hour they watched the insects they got from the Surabaya River. By using a guidebook on water bugs they differentiate the types of insects that are tolerant and intolerant of pollution in Surabaya river. Water bugs are an indicator determining the quality of water in rivers.
After conducting field observations, they presented the results of their water quality research. CONTEMPLATED Status MEDIUM describes the current health condition of the Surabaya River. After knowing the status of water quality, they are committed to continuing to protect the Surabaya River from throwing garbage at the river so that its sustainability is maintained.