This descriptive-correlation study aimed to determine the influence of exposure to the English linguistic environment and affective filters on the writing competence of 176 students enrolled in English Proficiency Program (EPP) classes of a college in Davao in the school year 2011-2012. The random sampling technique, three researcher-made questionnaires and 7 statistical tools specifically frequency count, percentage, mean, analysis of variance (ANOVA), t-test, Pearson Product Moment of Correlation or Pearson r and linear regression analysis were used. The study concluded that: the English Proficiency Program (EPP) students have a moderate level of exposure to the English linguistic environment, a low level of affective filters and a very low level of writing competence; there is no significant difference in the level of affective filters and the level of writing competence of students when grouped according to type of high school attended and course; and there is no significant relationship between exposure to the English linguistic environment and writing competence but there is a significant relationship between affective filters and writing competence.