The Saigon River's water quality was moderate to very good from 2021 to 2023, but it began to worsen in 2024.

The Saigon River is in eastern Ho Chi Minh City.

In 2024 and 2025, the river had too much ammonia, a pollutant from waste and wastewater, which was 1.2 to 5.2 times higher than allowed.

The river also had too much organic pollution, which was 1.2 to 3.6 times higher than allowed.

The water quality in canals and tributaries flowing into the Saigon River was poor to good.

Some areas had ammonia levels 87.8 times higher than allowed, and organic pollution levels 12.3 times higher than allowed.

The Dong Nai River had similar problems, with water quality ranging from moderate to very good, but getting worse after 2023.

Ammonia levels in the Dong Nai River were 1.2 to 1.7 times higher than allowed.

In 2024, some areas had organic pollution levels 1.5 to 2.2 times higher than allowed.

Tributaries of the Dong Nai River had ammonia levels 35.6 times higher than allowed and organic pollution levels more than 12 times higher than allowed.

Ho Chi Minh City has 19 protected areas around its water sources to keep the water clean.

The Saigon River is 256 km long and is one of the city's main water sources.

The Dong Nai River is 586 km long and supplies water to many areas.

The city also manages several reservoirs and water sources, including the Da Den and Song Ray reservoirs.

These reservoirs have very good water quality and are important backup water sources.

The city produces 807,800 cubic meters of wastewater daily, which all goes into the river and lake network.

From 2026 to 2030, the city plans to control wastewater, protect water sources, and restore river quality.

By 2030, the city aims to treat 80% of its wastewater and have 85-90% of its monitoring sites have at least moderate water quality.