Water used for the drinking purpose should
be free from any contamination like Arsenic, Nitrite,
Iron etc presence of Arsenic can affect millions of people.
Arsenic is one of the most hazardous substances found in
underground water. It is very difficult to detect the
presence of Arsenic in the groundwater and a lot of
research is going on in this regard.This paper presents
Arsenic hazard map includes known Arsenic-affected
areas and previously unaffected areas. Ranchi is capital
of Jharkhand state situated at 23.36-degree North to
85.33-degree East. Tropic of Cancer is passing through
the city at 23.4-degree North. Ranchi city has a
population of about 1.073 million as per 2011 census.
This paper presents the arsenic mapping of the Ranchi
city. With the help of multivariate interpolation it is
found that the maximum value of Arsenic is 212.998
microgram per liter near Tunki Tola. The minimum
value of Arsenic is below desired level (BDL) at Sidhu
Kanhu Park. This result can be used to aware the people
to stop using or installing any new borewell in the
Arsenic affected area
Keywords : QGIS, Arsenic, Contamination, Groundwater, BDL.