The lake is contaminated with domestic sewage and waste water through one drain located on the north-eastern side.

Also solid waste by the surrounding households area also vacated into the Mahadev Dighi.

King Jhujaroofa of Tripura defeated the Mog dynasty and captured Rangamati and established his new capital at Udaipur in the middle of year 590 AD.

[2] Netaji Subhash Mahavidyalaya which is the first college of Tripura is situated on the banks of Bijoy Sagar.

There are rock cut images of two lions installed in front of Mahadev temple north of Bijoy Sagar built into the soil.