Documents Awareness - Knowledge

Toxins found in Hanoi tap water

15 May 2014 | 11:53:58 AM

The cost of running water in Hanoi has been increasing sharply, while the quality of that water remains stubbornly low –toxin concentrations are far higher than permitted levels, while pipeline breaks are a regular occurrence.

People in outside provinces and cities have long envied Hanoians for the clean running water the capital city enjoys. The facts, however, suggest their feelings are misplaced.

A series of water treatment plants have been built in recent years to satisfy the rapidly growing demand in the city. However, the plants, with 100 year-old filtration technology, do not help improve the water quality. Hanoians live in fear that they may one day suffer deadly diseases because of the unsafe water.

Dr. Pham Hung Viet, Director of the Center for Environment Technology Research and Sustainable Development, affirmed that the treated water still has arsenic, manganese and chlorine concentrations well above Vietnamese and World Health Organization (WHO) standards.

Also according to Viet, only the Ngoc Ha Water Plant in Ba Dinh District is churning out water with an arsenic concentration meeting the standard of under 0.01 mg per liter. Meanwhile, water with high arsenic concentrations is still dispensed by other plants, including Phap Van, Nam Du, Yen Phu, Luong Yen and Thanh Tri.

In a sign of just how bad the situation is, research centers often cannot access water treatment plants to take samples for testing – they are barred by uncooperative management. Scientists must rely instead on water samples brought to them by local residents.

Water is treated mostly with sand filtration and chlorination which, according to Viet, is outdated technology. The method eliminates iron and, along with it, a portion of the arsenic.“The method is only helpful in lightly arsenic-contaminated areas (with a ratio of 1 part arsenic to 7 parts iron), while it cannot be used in heavily arsenic-contaminated areas,” said Viet.

But arsenic is not the only threat. Viet said that the detoxification process leaves chlorine residue which, when combined with organic pollutants during transmission to households, creates compounds harmful to people’s health.“These compounds can be very toxic, even with a small volume. They are just like pesticides,” Viet warned.

Dr. Tran Hong Con, a lecturer of the Hanoi University of Natural Sciences, also affirmed that the currently applied water filtration technology in Vietnam is a century old. Only a few of water treatment plants built recently, including Gia Lam and Cao Dinh, have been designed to treat manganese in water.

Con strongly recommends against using chlorine for water detoxification. In developed countries, chlorine has been replaced with ozone or ultraviolet radiation. However, since the technology is too costly, Vietnam still avoids adopting it.

Source: VietNamNet Bridge

Views: 996

Other news

Pine forests destroyed due to violations in forest management

(04/10/2019 07:25:AM )

Japanese carp released into Hanoi river and lake

(17/09/2019 07:00:AM )

Danger looms over Cat Tien Park as sand exploitation allowed

(13/09/2019 09:09:AM )

HCM City turns landfills into public parks

(09/09/2019 09:55:AM )

Fifth Green Architecture Awards launched

(05/09/2019 06:54:AM )

HCM City approves 3 waste-to-energy projects

(01/09/2019 07:30:AM )

Forest restoration set to conserve grey-shanked doucs in Quảng Nam

(08/08/2019 09:33:PM )

Hanoi struggles with waste disposal headache

(05/08/2019 04:20:PM )

Kien Giang to probe into Phu Quoc maritime reserve

(11/07/2019 09:58:AM )


Environmental Sustainability - we have choices

See more


MONRE supports and appreciates the cooperation...

VACNE, 4/12/2017) - The Ministry of Natural Resources...

See more
US Assistant Secretary of State and 10 Ambassadors...

Quang Binh provincial People's Committee on March 8th announced...

See more
Save the Dong Nai River: experts

HA NOI (VNS) — Scientist and experts have renewed their calls to the National Assembly and the Government...

See more
Some pictures of Starting Ceremony of Cycling...

(VACNE) - Afternoon of 22/07/2014, under...

See more