It supplies the city of Pardubice and the town of Chrudim and is also an important tourist destination located in the Iron Mountains.

[1] The environmentally most valuable part of Seč are Ostrůvek and the Oheb peninsula, which consists of a steep rock that ends with a small rocky promontory covered with pines.

This place is a home to some rare invertebrate species (snails, beetles) as well as a natural habitat of Eurasian eagle-owls.

It does not represent a direct risk to the people who swim in the water but it causes algal bloom.

The algal bloom season on Seč may start as soon as in June and gets worse when there's lack of rain which reduces the water flow.