Based on the study of 696 specimens from three populations of Triturus cristatus Laurenti, 1768 from 2016 to 2023, an analysis of information on the spectrum and frequencies of external morphological anomalies of the crested newt on the eastern macroslope of the Urals (Southern and Middle Urals) is presented, as well as current information on the geochemical specificity of habitats. To assess the species diversity of anomaly spectra, biodiversity indices such as Margalef, Shannon, and Berger-Parker are provided. The characteristics of habitat environments are evaluated, and possible factors (mineralization, predatory fish impact) that have teratogenic effects on populations of the crested newt at the northeastern range boundary are discussed.