Diarrhea is a significant public health issue in Northern Tanzania, where inadequate sanitation facilities and hygiene practices lead to high rates of infection. A mixed-methods approach was employed, including pre- and post-workshop surveys to measure changes in knowledge, attitudes, and behaviors regarding diarrhea prevention. Quantitative data were analysed using chi-square tests for categorical variables and t-tests for continuous variables. Adherence rates increased by 35% among participants who attended the workshops compared to those who did not (p < 0.01), with a significant reduction in reported cases of diarrhea after the intervention. The community health workshops significantly improved adherence to recommended hygiene practices, resulting in measurable reductions in diarrhea incidence. Further implementation should include regular follow-up sessions and integration into existing healthcare systems to sustain improvements. Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.