Rubuta ci gaba don wannan sakin layi - A kusa da shekarun 1850 ingancin ruwan sha ya zama batun damuwa da jama'a, kuma John Snow ya bincika yanayin ruwa a 1849. Majalisar ta zartar da Dokar Ruwa ta Metropolis 1852 don "ta samar da tanadi don tabbatar da samar da ruwa mai tsabta da lafiya ga Metropolis". A karkashin Dokar, ya zama ba bisa doka ba ga kowane kamfanin ruwa don cire ruwa don amfanin gida daga ruwan ruwan Thames bayan 31 ga Agusta 1855, kuma daga 31 ga Disamba 1855 duk irin wannan ruwa ya buƙaci a "tsarkake shi yadda ya kamata". Daraktocin sun riga sun yanke shawara a cikin 1847 don matsawa shigarwa don ɗakunan ajiyar su zuwa Seething Wells. An kammala kayan aikin a shekara ta 1852, kuma Lambeth ya haɗu da shi a can yana amfani da bututun ta zuwa birni ta Kamfanin Ruwa na Chelsea. Gidajen sun taka muhimmiyar rawa a binciken kididdiga na John Snow a lokacin barkewar cutar kwalara
, wurin yana da nisa fiye da sauran ayyukan ruwa kuma saboda haka yana da ruwa mai tsabta, wanda ya haifar da ƙananan mutuwar cutar kwalara.