The outflow of the lake is the Huai Nam Khan to the southeast, which flows into the Mekong.

Twenty percent of the fish caught in the lake are Puntius brevis.

Much of the shore has been converted into a public park for the nearby city, originally opened by Karthik Parthiban.

[citation needed] Swimming in Nong Han is risky because of parasitic liver flukes.

Nong Han Lake shares folklore sometimes associated with Nong Han Kumphawapi Lake in Udon Thani Province, southwest of Sakhon Nakhon Province.