The study investigated the performance of the Karumuna-Kanzenze water supply network extension project in Rwanda, focusing on community participation, water infrastructure, project management, and maintenance funds as key determinants. A descriptive and correlative research design was employed, involving 120 respondents in a census survey to comprehensively understand their perspectives. Data collection utilized questionnaires and documentary reviews, while analysis employed Statistical Package for the Social Sciences (SPSS) and Excel, incorporating descriptive statistics, Pearson's correlation, and multiple linear regression.  The findings showed an average mean score of 3.9583 indicating that respondents generally perceive effective community participation factors in the project. This "high mean" suggests substantial evidence of these factors, reflecting a positive perception of community involvement.  The standard deviation of 1.280635 implies some variability in how respondents perceive these community participation factors. This means that there's a positive perception, and differences in individual viewpoints warrant further investigation. The findings presented a high average mean score of 4.1236 indicating a very positive perception of the water infrastructure factors in the project as this suggests strong evidence of the effectiveness of these factors, demonstrating robust implementation. The standard deviation of 1.206418 suggests a consensus among respondents about the effectiveness of water infrastructure factors, with relatively little variability in their perceptions.  The findings confirmed that the high average mean score of 4.35973 reflects a very positive perception of the project management factors in the project. This indicates strong evidence of the presence and effectiveness of these factors, suggesting highly successful project management. The moderate standard deviation of 0.9977 indicates some variation in responses but not to a high degree. This suggests a consensus among respondents regarding the excellence of project management, which is an asset for the project's successful implementation and outcomes. The findings for an overall average mean score of 4.2597 is categorized as a "very high mean," indicating that, on average, respondents hold a highly positive perception of the project's maintenance funds-related factors. This suggests that maintenance funds have been effectively utilized to meet the project's objectives.  The standard deviation of 1.03315 suggests some degree of heterogeneity in responses, signifying that while the overall perception of maintenance funds is positive, there is variability in how individual respondents perceive these factors. Correlative analysis reveals strong and statistically significant relationships between predictor variables (community participation, water infrastructure, project management, and maintenance funds) and project performance. Multiple linear regression explains 92.3% of the variance, with community participation and project management exerting substantial positive influence.