NEMA Policy Enforcement as a Boundary Condition Linking Community Participation in Solid Waste Management to Environmental Conservation in Mbarara City South Division, Uganda

Urban environmental programs often assume that citizen participation automatically produces better conservation outcomes, yet participation may yield limited benefits where regulatory communication, monitoring and sanctions are weak. This article examined whether National Environment Management Authority (NEMA) policy enforcement and implementation moderated the relationship between community participation in solid waste management and environmental conservation in Mbarara City South Division, Uganda. A cross-sectional, descriptive-correlational mixed-methods design was used. Questionnaires were returned by 351 of 399 sampled participants (88.0%), while interviews with local council leaders and environmental officers provided contextual evidence. The instruments demonstrated strong content validity and internal consistency (overall CVI = .93; overall Cronbach’s alpha = .869). Hierarchical regression showed that community participation explained 42.0% of variance in environmental conservation. Adding NEMA policy enforcement increased explained variance to 50.8% (Delta R-squared = .088), and the interaction term contributed a further 5.5 percentage points, producing a final R-squared of .563. The interaction was positive and statistically significant (beta = .235, t = 5.14, p < .001), indicating that enforcement and implementation strengthened the contribution of community participation to environmental conservation. Interviews similarly showed that monitoring, sensitisation and penalties sustained community gains, whereas inconsistent follow-up allowed illegal dumping to recur. The article concludes that citizen participation and regulatory capacity are complementary rather than substitutable strategies. Mbarara City and NEMA should link community mobilisation with predictable inspections, accessible reporting channels, proportionate sanctions, reliable collection infrastructure and feedback to residents.