Blood on Meat

In the Name of Allah, Most Merciful and Compassionate

Blood on meat does fall under the category of filth.  However, it is excused filth (ma‘fuww ‘anhu), meaning that one can cook the meat and eat it without having to wash off the blood.  If one adds water to the meat for cooking purposes, and the water changes because of contacting the blood on the meat, this water may likewise be consumed.  

There is a caveat, though: if one pours water on the meat with the intention of washing off the blood, the blood is no longer excused (because it has come into contact with a foreign substance) and one must wash it off completely until all its traces are gone.  Slight traces that are hard to remove remain excused. 

(Fath al-‘Allam bi Sharh Murshid al-Anam, 1.359; Hashiyat ‘Abd al-Hamid ‘ala Tuhfat al-Muhtaj, 1.293)

And Allah knows best.

Hamza.