The pH became the approximate value of the human blood ( pH7.0→pH7.2 )Japanese >
The general bacteria was decreased. ( 25→9 ※Value in 1ml )
The iron was increased. ( 0.10mg/l→0.12mg/l )
The potassium permanganate consumption of the indicator of the water pollution was decreased. ( 1.0mg/l→0.5mg/l )

■Before conversion

■After conversion

■Comparison table

Examination day: August 15, 1994
Examination purpose: The propriety of water quality standards in water supply law
The chief of sanitation section in Setagaya-ku Yutaka Sakurada