In a letter, the Ministry told the states and Union Territories to construct toilets and rest rooms for women personnel on "priority" basis in the state action plan for 2014-15 as it is a long pending basic amenity.
According to official data, there were 84,479 women police personnel, accounting for five per cent of the force in January 2012.
"At existing police stations, outposts and barracks, a provision must be made for suitable facilities for women police personnel including separate hand washing and shower facilities with adequate supply of water.
Modi too has stressed on the need to construct toilets.
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"Pehle shauchalaya, phir devalaya' (toilet first, temple later), Modi had said at a function organised here for the youth.
Two teenaged girls, who were gang raped and murdered in Uttar Pradesh's Badaun May 27, were forcibly taken away by the accused when the girls had gone to relieve themselves as there was no toilet at home.