In the article the environmental management system at the enterprises of the petrochemical complexes and ecoanalytical laboratory activities as a part of it are considered. In addition to its direct responsibilities for the analysis of the test material the activities of eco-analytical laboratory include responsibilities to ensure the correct and timely document and maintain continuous access to the information of all performers involved in the process. The reader is invited to refer to the approaches to the formation and construction of information-analytical systems by the example of developing systems for data collection and processing for environment control laboratories. The purposes and tasks of developing systems were identified during the analysis of the informatization object. Algorithms for information processing were established, and the management system of the eco-analysis laboratory information is presented in a separate form as components with the establishment of areas of responsibility. In the findings the expected results from the information-analytical system in terms of growth needs of environmental management effectiveness are described.