Nearly two metric tons of dead fish have been removed from Phu Loc Canal in Da Nang over the past six days.

Huynh Trung Nhan, deputy director of Da Nang Sewerage and Wastewater Company, said on Thursday that the firm had sent a report on the mass fish death to the municipal Department of Construction.

He blamed the die-off of fish on early-season rains that suddenly changed the water environment.

Fish were first found dead in the canal in Hoa Khanh Nam Ward under Lien Chieu District last Saturday. A few days later, more fish were found dead in the canal as well as in Trung Nghia Lake.

Nguyen Phuong Lien, who lives near the lake, said that the area surrounding the lake has no large factories and that fish deaths are common, particularly during sudden changes in weather.

In order to deal with the odor and improve water quality and clarity, aquatic plants have been grown in the lake, though this has not seemed to completely solve the issue.

Sanitation workers at Da Nang Sewerage and Wastewater Company have been removing the dead fish from the canal and the lake since last Saturday, said the firm.

Specifically, half a metric ton of the dead fish have been collected from Phu Loc Canal and 1.5 metric tons have been pulled from the lake.  

The representative also said that hot weather and heavy rains likely reduced oxygen in the water, leading to the mass fish deaths.

The firm is working with relevant units to test water samples in order to find the cause of the die-off.

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