Abstract: Non-Revenue Water (NRW) remains a major challenge to water conservation, financial sustainability, and service delivery in Kenya. This study evaluated NRW reduction strategies employed by Homa Bay Water and Sanitation Company Limited (HOMAWASCO) across four water supply schemes in Homa Bay County. A mixed-methods descriptive design was adopted, guided by the Theory of Competitive Advantage and Natural Resource Use Theory. Data were collected from staff and customers through questionnaires, focus group discussions, field observations, and operational records, and analyzed using descriptive statistics, weighted means, chi-square tests, and thematic analysis. Findings showed that NRW consistently exceeded 40% across all schemes. Among 27 respondents, 55.56% rated real losses as moderate, 29.63% as high, and 7.41% as very high, with 92.59% rating them moderate to very high. Apparent losses were rated moderate by 55.56%, high by 18.52%, and very high by 11.11%. Major causes included ageing infrastructure, leakages, bursts, meter inaccuracies, billing errors, overflows, and illegal connections. Infrastructure rehabilitation was the most effective strategy. The study recommends integrated technical, commercial, and institutional interventions for sustainable NRW reduction.