The following villages are situated along the river Tazlău, from source to mouth: Tazlău, Frumoasa, Balcani, Ludași, Pârjol, Tărâța, Hemieni, Scorțeni, Tescani, Berești-Tazlău, Sănduleni, Livezi, Helegiu and Slobozia.

[2] The following rivers are tributaries to the river Tazlău (from source to mouth):[2] A dam and minor hydroelectric plant were set up on the Tazlau near Belci, a neighborhood of the town of Onesti.

In the early hours of the 29th of July 1991, an unusually large amount of rain fell that overwhelmed the dam and caused a breach and flooding up and down the river valley.

Investigations after the fact revealed that the studies of river flows in the area were rushed and incomplete, and that procedures for dealing with the situation were not observed because of various administrative mishaps.

[6] As of this writing, the area of the powerplant lies abandoned and the river flows left of it, where the dam once stood.