Halacha requires that when one washes his hands before partaking of bread, he must use clear water (Orach Hayim, Siman 160:1). The question thus arises in situations where the water appears "cloudy" when it first comes from the tap, whether a person must wait for the water to clear before performing Netilat Yadayim. Rabbi Yitzchak Weiss (Galicia-Israel, 1902-1989), in his work Minchat Yitzchak, in Helek 9 Siman 13, addresses this question. He rules that preferably one should wait a few minutes until the water clears up and then make Netilat Yadayim. He concedes, however, that if one used the water while it was cloudy, BeDiavad he doesn't have to wash again. However, Hacham Ben Tzion Abba Shaul in Ir L'Tzion, Helek 2, Peek 11:7, rules leniently even Lechatchila. This leniency is also the ruling of Hacham Ovadia Yoseph in Halichot Olam, Helek 1, page 336. As for the final Halacha, one may perform Netilat Yadayim with water that appears cloudy upon leaving the tap, and does not have to wait, but it is nevertheless preferable to wait a minute or so to allow the water to become clear before washing one's hands, in order to satisfy all opinions.