Chharwa Dam, constructed in 1954, is the life line of the Hazaribagh town water supply system.

Even with "mammoth" efforts to rejuvenate Chharwa and other water supply reservoirs in Jharkhand, in the parched-dry Hazaribagh summer it often reaches the dying stage, only to be revived by the onset of the monsoons.

[1][2] As per the Wetlands International Asian Waterbirds Census 2016, there were 1,462 water birds in Chharwa Dam.

[4] According to the 2011 Census of India, Chharwa had a total population of 843, of which 449 (53%) were males and 394 (47%) were females.

The total number of literate persons in Chharwa was 521 (73.59% of the population over 6 years).