Abstract
This study investigates the impact of urban environmental stressors on psychological well-being in three major Nigerian cities: Lagos, Port Harcourt, and Owerri. The research integrates quantitative survey data and qualitative interviews to capture both statistical trends and lived experiences. Quantitative methods involved structured questionnaires measuring exposure to noise pollution, air quality, overcrowding, and green space availability, alongside the Ryff Psychological Well-being Scale and the Kessler Psychological Distress Scale. Regression analyses revealed that noise pollution, poor air quality lack of green spaces, and overcrowding significantly predicted lower psychological well-being, accounting for partly half of the variance. Qualitative analysis identified emotional strain, the importance of green space as psychological refuge, resilience through social networks, and frustration over perceived urban neglect. Gender differences emerged, with female respondents reporting significantly lower well-being scores compared to males, underscoring the need for gender-sensitive interventions. City-specific analyses showed that Owerri respondents had the highest well-being scores, while Port Harcourt scored lowest, likely reflecting varying degrees of urban environmental stressors. Major conclusions point to the urgent need for integrated urban planning that prioritizes green infrastructure, noise reduction, and community-based mental health supports. This study advances interdisciplinary understanding of urban mental health challenges in the African context and provides evidence-based recommendations aligned with Sustainable Development Goals (SDGs) 3 (Good Health and Well-being) and 11 (Sustainable Cities and Communities).