Categories of water use
According to water legislation, all water bodies are strictly divided into two main categories depending on their intended purpose. This division determines the strictness of sanitary requirements for water quality.
- 1st category. Includes water bodies used to supply the population with drinking water (both via centralized water supply systems and through decentralized methods). This also includes water used in food industry enterprises for food production.
- 2nd category. Covers water bodies intended for recreational and cultural-domestic purposes. These are water bodies used for swimming, water sports, mass public recreation, as well as any water bodies located directly within the boundaries of populated areas.
Regulatory documentation and SanPiN
Current sanitary and epidemiological supervision of the state of water resources is carried out by Rospotrebnadzor laboratories. In their work, specialists rely on several key sanitary rules and norms (SanPiN):
- SanPiN 2.1.4.1110-02 — a document that directly regulates the organization of sanitary protection zones (SPZs) around water supply sources and drinking water pipelines.
- SanPiN 2.1.4.1074-01 — establishes hygienic requirements for the quality of drinking water supplied through centralized water supply systems, as well as rules for monitoring its safety.
- SanPiN 2.1.4.1175-02 — determines the quality requirements for water obtained from non-centralized sources (e.g., wells) and the rules for their sanitary protection.
Hygienic standardization of chemical substances
To ensure that water is safe for consumption and use, the content of any chemical compounds in it is strictly limited. The main tool for such control is the maximum permissible concentration (MPC).
MPC of a chemical substance in water bodies for household-drinking and cultural-domestic purposes is the maximum concentration of an element that, upon daily intake into the human body throughout their life, does not cause any negative consequences.
It is important that the MPC takes into account:
- Absence of direct or indirect impact on health.
- Safety for current and all future generations.
- Absence of negative effects in remote periods of life.
- Preservation of favorable hygienic conditions for water use.
Classification of pollution and supervision
All chemical substances that can enter water are classified according to the degree of threat to human health and the ecosystem. There are 4 hazard classes:
- 1st class: extremely hazardous substances;
- 2nd class: highly hazardous substances;
- 3rd class: moderately hazardous substances;
- 4th class: low-hazard substances.
In addition to controlling the water bodies themselves, a critical component of sanitary and epidemiological supervision is hygienic certification. Any products, materials, or equipment involved in the production, storage, and transportation of drinking water must undergo inspection and receive a corresponding safety certificate.
Briefly: answers to topical questions
How many belts are included in the sanitary protection zone (SPZ) of a water supply source?
The sanitary protection zone of a water supply source includes three belts.
- Belt I — the strict regime belt, located directly around the water intake point.
- Belt II — the restriction belt, covering the adjacent territory of the water basin and populated areas.
- Belt III — the restriction belt, where special regimes of economic activity are established.
What is the purpose of the first (strict regime) belt of the SPZ?
The purpose of the first strict regime belt is part of the overall goal of creating a sanitary protection zone: eliminating the possibility of pollution, a decrease in the quality of the source water at the water intake point, or a reduction in its yield (capacity).
What restrictions on economic activity apply in the second belt of the SPZ?
In the second belt of the sanitary protection zone, regimes restricting economic and other activities are established. Specific types of prohibited activities are not detailed, but it is known that this belt covers the adjacent territory of the water basin, including nearby populated areas. The restrictions are aimed at eliminating the possibility of pollution, a decrease in source water quality, or a reduction in its yield.
What is the purpose of the third belt of the sanitary protection zone?
The third belt of the sanitary protection zone is a restriction belt designed to regulate economic and other activities. Its main purpose coincides with the overall goal of establishing the entire sanitary protection zone — eliminating the possibility of pollution, preventing a decrease in the quality of the source water at the water intake point, and protecting against a reduction in its capacity.
Class and exam questions
What is the MAC (MPC) in the context of water quality?
This is the maximum concentration of a chemical substance which, when consuming water throughout one's life, does not harm human health or descendants, and does not deteriorate the conditions of water body use.
Which document regulates the creation of sanitary protection zones?
The organization and maintenance rules for such zones are regulated by SanPiN 2.1.4.1110-02.
How many hazard classes of chemical water pollution exist?
There are four classes: from extremely hazardous (1st class) to low-hazard substances (4th class).
What else to study on this topic
- Requirements for the water quality of centralized systems (SanPiN 2.1.4.1074-01)
- Features of sanitary protection of non-centralized sources (SanPiN 2.1.4.1175-02)
- Methods of laboratory control for MPC indicators in water
- Procedure for hygienic certification of water supply equipment
- Impact of highly hazardous chemical substances (classes 1 and 2) on the body
Master the entire topic in the "Hygiene" course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on the topic "Sanitary protection zones of water supply sources" and 530 more pages of the subject
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 95 video lessons for the subject
Other topics in "Chapter 2. Ecological and Hygienic Problems of the Hydrosphere and Water Supply"
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.