With the current high standard of living, the greater the amount of wastewater discharged, especially in urban areas, Ho Chi Minh City and Hanoi are experiencing alarming levels of pollution. Untreated waste, grease, and cleaning chemicals are blatantly dumped into rivers, seas and lakes by people, companies and factories. Let’s do small things every day such as: protecting trees, disposing of garbage in the right places, and not discharging untreated daily domestic wastewater into lakes and rivers to avoid causing environmental pollution.At the same time, propaganda for people to have a better sense of environmental protection in general and water environment in particular. Water is an invaluable resource, it accounts for nearly 75% of the Earth’s surface, but we should consciously use it more economically, reasonably and properly.