In the article the authors examine the main features, types, especially operating systems, their main objectives, main functions, rules and content requirements, aesthetic requirements, the main characteristic of components and elements are considered.

The study of the dynamics of productivity of middle school students in the general education school during the school week was conducted. It has been revealed that when the class schedule is created, the norms of the organization of the school day are sometimes not observed, which is reflected in the dynamics of the mental working ability of students in the educational process.

Main problem: The article analyzes water quality assurance as the main goal of preserving human health. The study of chemical and microbiological parameters of wastewater and drinking water was carried out using generally accepted standards. The number of deaths associated with the use of contaminated drinking water, according to WHO, tripled in 2021 and reached almost 19 thousand against 6 thousand in 2020. In addition, the number of neoplasms, diseases of the genitourinary system, digestive organs and skin increased by 2 %, to 1.486 million. The reasons for the increase in the level of harmful chemicals and microbiological pollutants in the water are outdated sewage treatment plants, old pipes and disinfection with chlorine. Purpose: Study of the quality of wastewater and drinking water in Pavlodar, study of the quality of wastewater and drinking water in Pavlodar. Methods: Sampling of wastewater, chemical and bacteriological analysis of wastewater and drinking water, statistical method, correlation analysis of experimentally obtained results and calculated characteristics, etc. Results and their significance: In the field of public health risk, pollution of reservoirs that are sources of household drinking water supply and recreational water use, the continuing necessary high deterioration of water supply networks, their accident rate, as a result of low level of operation, failures in the operation of treatment facilities. Hygienic assessment of reservoirs according to complex indicators indicates the continuing high degree of water pollution in places of water use. The water quality indicators of the surface reservoirs of the region remain low in terms of sanitary and chemical (primarily organoleptic and general sanitary), as well as microbiological indicators. According to toxicological indicators, the level of water pollution in places of water use is estimated as moderate. The main pollutants of the Irtysh River in Pavlodar are industrial enterprises and housing and communal facilities that discharge untreated or insufficiently treated wastewater into reservoirs. A complex of causes of drinking water pollution has been identified: high deterioration of water supply networks, their accident rate, because of a low level of operation, failures in the operation of treatment facilities, unfair treatment of industrial wastewater by industrial enterprises of Pavlodar, etc. Priority preventive directions for improving the quality of water as a source of life are the implementation of long-term targeted planning of measures for the modernization of water supply and sewerage networks and facilities in Pavlodar. The state of water supply necessary and measures to improve it should be constantly monitored and considered at meetings of sanitary and anti-epidemic commissions.

sing themselves» as domestic producers of goods, works and services, received preferences and used government support measures, won government and other purchases, while not having enough equipment for production. The article is devoted to current problems and prospects for the application of the Industrial Certificate in the Republic of Kazakhstan. The dynamics of the development of the sphere of public procurement of the Republic of Kazakhstan is considered, depending on the specific requirements for certain areas of production of goods, works and services. The material in this article is important from the point of view of ensuring fair competition between competing enterprises in the same industry. Analysis and Deduction. The complex of transformations in the system of standardization, certification and quality management has been carried out since the first years of independence of the Republic of Kazakhstan. These transformations have been observed over the years, vivid examples of which are: the application of the European model of technical regulation to the modern realities of the economic situation in the Republic of Kazakhstan, accession to the Customs Union, the adoption of unified technical regulations of the Customs Union, the introduction of new regulations and legal acts defining the share of local content in products and services, as well as the potential of domestic industries. The results of these transformations have proved that the system of technical regulation of the Republic of Kazakhstan is an effective tool for the development of the economy. The development of new Kazakhstani normative legal acts and normative documents introduced to support the domestic producer of goods and services will contribute to the transformation of the old system and the creation of a new one that is fundamentally different from the previous one. The article discusses problematic issues in the field of industrial certification, namely: lack of qualified personnel; unregulated pricing system for work carried out in this area; the complexity of the industrial certification procedure; lack of automation of processes of the industrial certification mechanism. Analyzing the practice of industrial certification, this article offers recommendations for solving the above problematic issues. New edition of amendments and additions to the «Rules for the formation and maintenance of the register of domestic manufacturers of goods, works and services, as well as the issuance of an Industrial certificate» approved. by the decision of the Presidium of the National Chamber of Entrepreneurs of the Republic of Kazakhstan «Atameken» dated 28.12.2018. No. 28 is designed to reconstruct the process of obtaining the Industrial Certificate. The process should become more transparent, understandable and highly efficient. Also, with the introduction of changes, the problems that hindered the receipt of the Industrial certificate by individual enterprises should be resolved