Abstract
Objective: To identify and analyze the losses in the water supply system of Caxias-MA from June 2015 to June 2016. Methods: exploratory epidemiological research using descriptive statistical analysis of data. The data collection was carried out at the municipality responsible for the water supply system of the municipality of Caxias / MA. Results: Distribution Loss Indices in the municipality of Caxias / MA had an average of 49.48% (± 4.10%), a minimum of 40.63% and a maximum of 54.18%. Coefficient of variation of 8.28% in an amplitude of 13.55%. The Total Bond Loss Index was 503.66 liters / bond / day. Discussion: In all the considered months, the system of the municipality of Caxias / MA was considered bad. It is also observed that the variability of the data is low, which probably demonstrates the lack of investments and actions to minimize the problem. The IPL represented an alarming number compared to the average Brazilian consumption of 167 liters per capita / day. Conclusion: The general picture of losses in the municipality of Caxias / MA is significantly negative. It is necessary programs to control the losses, because as a result of the existence of leaks in the distribution network, where a depressurisation of the conduit occurs, it can lead to contamination by the entry of harmful agents into the pipeline. It is suggested the studies that relate the water quality and the indices of losses in the supply system of Caxias / MA.