Name of the Statistical Indicator
The state of the quality of surface waters of Kazakhstan by hydrochemical indicators
Unit of Measurement
mg/dm³ Water quality class (1–6) Grade 1 (very good quality) Grade 2 (good quality) Grade 3 (moderately polluted) Grade 4 (polluted) Grade 5 (very polluted) Grade 6 (highly polluted)
History of the Indicator
since 2019
Definition of the Indicator
The indicator characterizes the state of surface water quality in the Republic of Kazakhstan based on hydrochemical parameters determined through laboratory analysis of water samples. Water quality assessment is carried out by classifying water bodies into one of the quality classes (from Class 1 — "very good" to Class 6 — "highly polluted") in accordance with established standards.
Methodology for Calculation
The unified system for classifying water quality in surface water bodies, approved by the order of the Minister of Water Resources and Irrigation of the Republic of Kazakhstan dated June 4, 2025, No. 111 NК.http://adilet.zan.kz/rus/docs/G25MA000111 The "Environmental Bulletin on the State of the Environment of the Republic of Kazakhstan" is published on the website of the RSE "Kazhydromet".
Source of the Indicator
The responsible state body for data formation is the RSE "Kazhydromet" under the Ministry of Ecology and Natural Resources of the Republic of Kazakhstan.
Date of Last Update
14.04.2026
Date of Next Update
31.07.2027
Responsible Structural Division
Department of Production and Environment Statistics
Responsible Officer
Dana Adilbek
Telephone Number
74-93-11, 74-93-07
E-mail
d.adilbek@aspire.gov.kz
