名古屋市上下水道局

・The History of Slow Sand Filtration in Japan

The History of Slow Sand Filtration in Japan

Slow sand filtration (SSF) is water purifying method developed in England in 1829. It became popular in Europe and was adopted in purification plants all over the world as effective countermeasures against waterborne infectious disease including cholera, dysentery or so on. In prewar, SSF was also adopted in Japanese most purification plants since Yokohama city has introduced it as the first modern waterworks of the nation.

Slow sand filters were constructed in three prefectures of Tokyo, Kyoto, Osaka and five main port cities of Hakodate, Yokohama, Niigata, Kobe, Nagasaki where needed prevention of waterborne disease, and then spread in many parts of Japan as shown in below table.
The Akagawa Teiku Purification Plant (PP) constructed in 1888 in Hakodate city, the Sanno PP in 1904 in Okayama city, the Takao PP in 1905 in Shimonoseki city, Yamanota PP in 1906 in Sasebo city are in operation today as they were 100 years ago.

Table 1 Construction Year of Slow Sand Filter

Name of City Year
Yokohama 1887
Hakodate 1888
Nagasaki 1889
Osaka 1893
Hiroshima 1896
Tokyo 1896
Kobe 1899
Okayama 1904
Shimonoseki 1905