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I remembered this when I first heard the story in a documentary. It was the water coming from the pump of Broad Street that brought cholera to the vicinity. And it is obvious in the map. Most of the cases of cholera are clustered near pump B. Other cases far from it means that victims of cholera or their respective relatives got water (or used to get water) from the said pump. What an amazing investigation he had done! :)

I actually didn't knew about this case. But by seeing the map, it is observed that most of the cases of cholera are clustered around B and and at other places the cases of cholera is less. It is always seen that the place responsible for the disease has most of the cases around it and less on the other places. So,the correct answer is pump B....

I think I first heard the story of a documentary . It brought cholera to the vicinity of the Broad Street pump water was coming from . And it is obvious map . Most cases of cholera cholera victims or their respective relatives said pump water ( or water to drink ) got very far from the station B. This means that other cases are clustered around .And another way I say the lying in the center of streets and passages, because it is the pump B, the term "outbreak" is to be used. So when the water pump broke b emitted from the the neighborhood.

when i observed the map clearly there is almost equal spread of disease on both the sides of pump B but this situation was not observed with other pumps so i thought it might be PUMP-B

I think because there are alot of black rectangles around Pump B which means cholera spreads from pump B so Dr Snow identified and disabled it

The question itself gives us the answer. One can notify the line which says" Dr John Snow was able to pinpoint the water pump that was the source of the outbreak. " Here, the source itself describes the area where cholera cases were more as compared to the other places where it spread to. Cholera spread there as a result of the contamination of water which is more likely from that of the pump B present at that respective street. Hence the water pump identified by Dr.Snow was pump B.

Most cases of the cholera are reported at pump B, and at other pumps the cluster of cholera patients decreases with respect of their distance from pump B.

its pump B, because it lying in the center of street and in the Passage the word "outbreak" is used. so when pump b out broke the water just flowed to the surroundings. Its all common sense.

ellaam oru guess la adichu vidradhu dhaaa ... ha ha ha ...... :D

The reason is simple because a disease spreads in region which are close to each other and pump b) was located in a crowd full area

if you see closely pump b near of it there is writing broad st.

its pump b as more clusters of cholera rwere found at the place by which water was supplied throughtt this pump

pump is b

One could easily figure it out that it is pump B , bcoz the black triangles indicating cholera stats are constellated near pump B . And that is the clue

there are more cases near pump b

This is a pretty cool tracking problem, but as usual, the image credit is a huge spoiler alert. If one goes onto the Wikipedia page, they can see that there is an article about the incident, and read "The pump is located at the intersection of Broad Street and Cambridge Street." and I quote exactly. But anyways, to legitimately solve the problem, I would suggest finding where the highest density is located. This is obviously Pump B.