Environmental impact assessment (EIA) is "the decision-making process through the identification of potentially significant environmental effects and risks of a project". Environmental impact analysis is one of the phases of an EIA (Sadler and McCabe, 2002). Environmental impact analysis is a process that provides decision makers with an indication of the likely consequences of their action (Wathern, 2013). This phase includes identifying the impact and determining the significance of the impacts. Impact identification is the process of illustrating the cause and effect relationship of project activities and key environmental aspects. It requires systematic expert knowledge and judgment (Sadler and McCabe, 2002). In this study, the key environmental aspects are the activities in the two MCF treatment units that directly interact with the surrounding environment and result in environmental impacts.2.2.2. Determination of impact significance Significance is the intensity of impacts. Intensity can include beneficial or instrumental, reversible or irreversible, repairable or irreparable, short or long term, temporary or continuous, local, regional or global, accidental or planned, direct or indirect, and cumulative or single (Canter & Canty, 1993 ). determination is a process of making judgments about what is important, desirable, or acceptable (Lawrence, 2007a&b; Sippe, 1999). The determination of impact significance is the prediction of the magnitude of the impact (Thompson, 1990). It means considering the characteristics of the impact such as magnitude, duration, frequency, spatial distribution, reversibility, likelihood) (Beanlands & Duinker, 1983). According to Canter & Canty (1993), determining the significance of the impact has a conceptual relationship with screening and.... .. half of the paper ......issued by four sectors of the region in which the factory is located . These experts were specially selected based on their responsibilities, because these are important sectors in the regional state of Tigray that have experts to evaluate and control factories. In line with this, 60 employees were selected in the factory (30 from CRM and 30 from COK). Grouping employees working in the two processing units according to their work shift to ensure participation and selecting ten employees using a simple random method from each shift.2.3.3. Household survey In addition to respondents from the factory and external sectors, the study used the local community living around the factory for comparison purposes. The study selected 120 local households from a total of 1122 households using the simple random method. Data were collected from families through structured interviews.