This document outlines the efforts of a public health engineering group to make their city the healthiest city. It discusses improvements made across several key fields over 20 years. The process involved 3 phases: an initial 5-year phase for planning and campaigning, an 8-year phase to start major projects and research, and a final 7-year phase to analyze systems and plan for the future. As a result of focused efforts in areas like the environment, transportation, waste control, and public awareness, the city has seen significant reductions in air and water pollution and increases in green spaces.