... KOBAYASHI*, Futoshi YAZAMA**, Hiromi IKEURA*, Yasuyoshi HAYATA* Norio MUTO** and Yutaka OSAJIMA*** * School of Agriculture, Meiji University, 1-1-1, Higashimita, Tama-ku, Kawasaki, Kanagawa, ... Japan Water Works Association (JWWA). (2001). The method of Japan Water Works Association. p.573-613 (in Japanese). Kobayashi, F., Hayata, Y., Kohara, K., Muto, N., Miyake, M. and Osajima, ... ml of appropriate dilutions of samples was inoculated in standard plate count agar (Nihon Pharmaceutical Co., Ltd., Tokyo, Japan) and aerobically incubated at 37°C for 48 hr, and the colony-forming...