Now used in Russia means of indication in express analysis methods for environment control have a wide dispersion on hazardous substances determination accuracy. In case of visual indication’s new means implementation it is necessary to show experimentally that they are suitable for the solution of expected tasks with a minimum error for results of polluting and dangerous substances’ ions concentration analysis. Reusable solid-phase color indicators based on styrene and divinyl benzene copolymers containing chromogenic groups in their structure have been considered in this paper and these solidphase color indicators practical use possibility assessment after color digitization, and express analysis techniques accuracy assessment on a number of water objects for identification of their toxico-ecological condition has been carried out.