This study aims to determine the level of readability of integrated science teaching material has the theme of waste oriented to environmental literacy developed by 4S TMD (Four Steps Teaching Material Development) method. Environmental-oriented integrated science teaching material are oriented to the components of environmental literacy according to Middle School Environmental Literacy Survey (MSELS), such as environmental knowledge, cognitive skills, affective/attitude, and behaviour towards environment. This research was conducted in one of 7th grade consisting of 30 pupils in one of junior high school in Bandung Barat. The instruments are trial test questions readability which consists of writing the main idea of paragraphs, easy questions/difficult paragraphs, and multiple choice questions related to the materials in the paragraph presented. The result of these trial become a basis to do didactic reduction towards difficult concepts for student to understand. Didactic reduction is one of steps in the 4S TMD method, namely the stage of reducing the difficulty level of teaching material. Based on the result of readability test to the teaching material after didactic reduced, the average readability of all chapters in teaching material is 74,7% as the highest category.