The deceased have been identified as Rita Devi (35) and her two daughters, Sneha Rani (13) and Anjali Kumari (10), police said.
The bodies of the women's eight-year-old twin daughters, Ridhi and Sidhi, had been recovered on Sunday after all of them jumped in the dam the previous day.
Police claimed that the woman, a resident of Laxmi Nagar area in the city, took the extreme step after she had a verbal duel over a monetary dispute with her husband Sanjay Kumar.