The paper examined the trend of pipe- borne water supply as related to the population size in Mubi metropolis of
Adamawa State, Nigeria. The main objective of the study is to determine how realizable is the vision 20, 2020 of
public authorities in Nigeria In respect of water needs of people in Mubi metropolis .it was conducted with the aid
of secondary data obtained from Adamawa State water board, Adamawa State Rural Water Supply and
Environmental Sanitation Agency and Federal Office of Statistics in federal government secretariat, yola. The two
variables examined are water supply (response variable) and population size (explanatory variables). Secondary
data on the two variables were obtained for a period of ten years and were tested to determine the strength of
linear relationship between the two. The outcome of the test enabled the author predict the conditions of water
supply in Mubi metropolis for the period leading to the year 2020 using regression analysis as a tool. It was
discovered that with political will and financials commitment, authorities in Mubi metropolis are capable of
providing water that will meet the needs of Mubi residents in year 2020. As a guide to the authorities of the
metropolis in achieving this objective, a combination of hard- path and soft-path approaches are recommended
to resolve the water problems of the metropolis.