We have assessed ecological significance of 5 anthropogenic water biotopes (Košské mokrade – wetlands) after the brown coal mining, water reservoirs, gravel pits, sand pits and lowland channels. We have used the data from 252 localities in which we found 22 270 specimens. The highest species richness has the gravel pits – 50 species, lowland channels – 48 species and water reservoirs – 45 species respectively. The first of them has the highest Shannon diversity (H´= 2.83) as well. Ischnura elegans, Platycnemis pennipes, Enallagma cyathigerum, Coenagrion puella as well as eurytopic and stagnicolous spp. are the dominant ones. We confirmed 25 endangered and protected species for example Coenagrion ornatum, Cordulegaster heros, Epitheca bimaculata, Libellula fulva, Orthetrum coerulescens. The biotopes differ one from another and each of them also vary on the microhabitat level. Basically the evaluated biotopes are the dynamic ecosystems vulnerable to disturbance, the change of water conditions, the increasing eutrophication and the spread of both alien and invasive plants. Thus usages of older data have the limited period of validity.