ɔːlðˈoʊ ðə sˈoːɹs ʌv pəlˈuːʃən hɐz tʃˈeɪndʒd sˈɪns nˈaɪntiːnhˈʌndɹɪd fˈɪfti, bɪkˈʌz ʌv stɹˈɪkt ɛnvˌaɪɹənmˈɛntəl lˈɔːz ænd ðə jˈuːs ʌv wˈɔːɾɚ pjˌʊɹɹɪfɪkˈeɪʃən ɪkwˈɪpmənt, wˈɔːɾɚ pəlˈuːʃən ɪz stˈɪl nˌɑːt fˈʊli kˈɜːbd.
Although the source of pollution has changed since 1950, because of strict environmental laws and the use of water purification equipment, water pollution is still not fully curbed.