Water hardness in the city has met the standard for mineral water, experts said during a health education event on water safety and quality launched by Shanghai Health Promotion Center and the Pudong New Area Health Commission on Wednesday.

Shanghai has been looking for a high-quality drinking water source and the Qingcaosha Reservoir is now the major source for local residents.

Since using the reservoir in 2011, the water quality has been improved a lot and met all 106 national data, officials said.