The
The
The pride and
sustenance of
The river’s waters
failed to meet national quality standards in recent tests, said Nguyen Van
Phuoc, director of
He told the
workshop, jointly organized by the Sai Gon Giai Phong (Liberated Saigon)
newspaper and HCMC Department of Science and Technology, that studies were
done during the rainy season in 2011 and dry season in 2012 on the stretch
that flows between the Ben Suc Bridge (Cu Chi District) and Phu My Bridge
(which connects districts 2 and 7).
He said the water
quality goes down in downstream areas due to stronger impact of domestic and
industrial wastewater in HCMC and the neighboring
Domestic
wastewater is the most serious cause of pollution, making up 62.2 percent of
the total wastewater that flows into the river, the workshop heard.
Nearly 50
industrial parks and clusters are situated along the river, discharging more
than 100,000 cubic meters of wastewater per day.
Though most of
them have central wastewater treatment systems, many firms in the parks and
clusters directly pump their untreated wastewater into river without using
the treatment plants.
Small production
facilities in urban residential areas, especially pottery factories and
riparian eateries in Binh Duong’s Lai Thieu Ward, also discharge untreated
wastewater into the river.
Hospital and
health centers discharge about one-tenth of the wastewater from industrial
parks and clusters in terms of volume, but more than 65 percent of these
establishments do not have satisfactory wastewater treatment systems,
although their discharge can contain dangerous bacteria and other hazardous.
Animal farms also
release more than 2,600 cubic meters of wastewater containing harmful
bacteria, worsening to the contamination.
Phuoc said the
city has just one wastewater treatment plant with a capability of 140,000
cubic meters a day, while the rest of more than 1.2 million cubic meters
discharged every day from local households is pumped directly into the river
without treatment.
Wastewater
treatment factories should have their technology upgraded to process
pollutants such as microorganisms and heavy metals, he said.
Nguyen Ngoc Anh
of the HCMC Irrigation Association and Phan Minh Tan, director of
the city’s technology department called for more monitoring stations along
the Dong Nai River, of which Saigon River is one tributary, so that the
authorities are regularly updated on the river’s situation.
Anh said more
water should be discharged from upstream reservoirs to push back pollution.
Phung Chi Sy,
deputy director of the Vietnam Institute of Tropical Technology and
Environmental Protection, said many measures had to be taken together,
including better domestic wastewater collection and treatment, relocation of
firms that cause pollution, and projects to prevent pollution, improve the
environment, protect nature and biodiversity, and increase public awareness
about river protection.
Dong Nai River,
which is the longest to run exclusively within Vietnam, provides water for
nearly 20 million people of 11 provinces and cities, including HCMC, Binh
Duong, Dong Nai, Long An and Tay Ninh, living along it. Half of them are HCMC
citizens.
It is the city’s
main source of water supply, main waterway that facilitates a lot of trade
and commerce, and hosts important facilities, including the
By Mai Vong,
Thanh Nien News
|
Thứ Tư, 27 tháng 11, 2013
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