<prompt> Population norm for Health assistant in tribal areas:130000120000Jan-00Jan-00  <response>: Health assistant male covers: 30,000 population in plains. 20,000 population in hillytribal areas. Also remember, population covered by: 1 Sub-center in plains- 5,000; Hillytribal areas- 3,000. 1 CHC in plains- 1,20,000 ; Hillytribal areas - 80,000. 