Quality, Standards and Testing

Water needed for human consumption, industrial purposes or other requirements must cater to certain minimum standards. The quality of any water is defined by its physical and chemical properties (characteristics). Physical properties include its appearance (colour, clarity and odour, perhaps also its taste) while the chemical properties refer to the constituents dissolved in it. Some of the physical properties are measurable and can be expressed in units of measurement while others like appearance, odour or taste are clearly subjective. However, all the chemical constituents can be measured accurately.

Drinking water must meet certain quality standards to safeguard the health of the people. The permissible and desirable limits of various parameters in drinking water have been detailed as per the Bureau of Indian Standards (BIS) standard specifications for potable water. These parameters are included in BIS-10500-1991. The various parameters covered include colour, odour, pH, total dissolved solids, hardness, alkalinity, elemental compounds such as iron, manganese, sulphate, nitrate, chloride, fluoride, arsenic, chromium, copper, cyanide, lead, mercury, zinc and coliform bacteria. The tolerance limits for inland surface waters for various classes of water use have been published by the Central Water Commission. Per ISI-IS: 2296-1982, the tolerance limits of parameters are specified as per classified use of water depending on various uses of water ranging from Class A to Class E.

What does the water that one drinks contain, what substances are dissolved in it and what are their safe limits? What are the issues that affect water quality? For more detailed information on all this, please read our FAQs on Rules, Regulations & Standards concerning water and Equipments used to measure water quality and quantity

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Featured Articles
September 2, 2024 Recommendations made by an expert committee, the NGT's subsequent orders, and a critical analysis of these developments
Drum screens at Bharwara sewage treatment plant (Image: India Water Portal)
January 30, 2024 The workshop provided inputs into the newly formed committee for “Standard Operation Procedure for Quality Testing of Drinking Water Samples at Sources and Delivery Points”
Sector partners come together to supplement the efforts of the government on water quality and surveillance (Image: Barefoot Photographers of Tilonia)
October 4, 2023 वैज्ञानिकों को पहली बार बादलों में सूक्ष्म प्लास्टिक (माइक्रोप्लास्टिक) की मौजूदगी के सबूत मिले हैं। शोधकर्ताओं का भी मानना है कि इसका जलवायु और समुद्री पारिस्थितिकी तंत्र पर गंभीर प्रभाव पड़ सकता है।
बादलों में प्लास्टिक के कण
July 8, 2022 Indian rivers are experiencing rising temperatures, which can lower the oxygen carrying capacity of their waters and spell doom for living organisms, small and large living in the waters.
The Karamana river in Thiruvanathapuram, Kerala (Image Source: India Water Portal)
June 22, 2021 Nonylphenol and its ethoxylates in drinking water: A health challenge
Water treatment facilities are incapable of removing many chemical compounds and need to be upgraded (Image: PxHere)
Access of the poor to water supply and sanitation in India - Salient concepts, issues and cases by the International Policy Centre for Inclusive Growth
This paper by the International Policy Centre for Inclusive Growth deals with access of the poor to water supply and sanitation in India. Posted on 20 Dec, 2010 10:04 PM

This paper by the International Policy Centre for Inclusive Growth deals with access of the poor to water supply and sanitation in India. It argues that economic, technical, institutional as well as social factors constrain access to safe drinking water and proper sanitation in India for both the urban and rural poor, and that coverage figures do not reflect this restricted access. It finds that, increasingly, communities are being required to manage their own water and sanitation schemes, not just in rural areas but in urban ones as well.

The paper deals with domestic water supply and sanitation and presents a historical overview of the phenomenon in rural and urban India. This is followed by a critique of available figures for coverage which, it is contended, seem exaggerated because they do not account for the several constraints to access. It addresses the specific institutional problems faced in the public sector delivery of these two utilities in India apart from dealing with the parallel yet thus far limited presence of the private sector in these twin arenas.

Mining - An increasing threat to our rivers - Article by Nitya Jacob
Mining constitutes a major, and largely unrecognized, threat to our rivers. It takes away what we have and also destroys whatever is left of it. Posted on 20 Dec, 2010 12:29 AM

Content Courtesy: Solution Exchange and Nitya Jacob
Author: Nitya Jacob

India’s arteries are choking. Her rivers, the lifeline of hundreds of millions, are over-taxed, polluted and encroached. They are being mined, dammed and emptied of water. Save for the four monsoon months, most rivers are streams of drains, depending on how many cities they pass through. This year people gaped in awe at the River Yamuna (I am sure they were over-awed by other rivers elsewhere too) as for the first time since 1978 looked like a river and not a drain.

Groundwater quality in shallow aquifers of India – A report by the Central Ground Water Board
Summarizing various aspects of Ground water quality with a special reference to six parameters - salinity, chloride, arsenic, fluoride, iron and nitrate. Posted on 14 Dec, 2010 07:54 AM

This report by the Central Ground Water Board entitled ‘Ground Water Quality in Shallow Aquifers of India’ is an outcome of the follow up of one of the important recommendations of the second meeting of the Advisory Council on Artificial Recharge to Ground Water during September 2007. It attempts to summarize various aspects of groundwater quality in the shallow aquifers in the country with special reference to six parameters viz. salinity, chloride, arsenic, fluoride, iron and nitrate.

Uniform protocol on water quality monitoring by Ministry of Environment and Forests (2005)
Uniformity in procedure for water quality monitoring mechanism by all monitoring agencies, and agencies in order to draw water related Action Plans Posted on 13 Dec, 2010 07:32 PM

This deals with the Central Government’s order on “Uniform Protocol on Water Quality Monitoring Order” in June 2005 in exercise of the powers conferred by section 3 of the Environment (Protection) Act, 1986. Due to the deterioration of the river water quality, health and livelihood of the downstream people are being severely affected and concerns are raised time and again. 

Community participation in ground water management
The article is about the knowledge of groundwater level and quality monitoring for sustainable management of ground water. Posted on 07 Dec, 2010 12:29 PM

Knowledge of ground water monitoring is pre-requisite for sustainable management of ground water in an area. Water level monitoring as well as understanding about its quality need to be exercised at community level enabling them to take decision on common resource.

Water treatment - Extended user testing of water treatment devices in Andhra Pradesh - A research paper by PATH
A key to good health is safe and clean drinking water. This is not available to everyone equally. How do society's poorer sections adapt and use water treatment devices in their daily life? Posted on 16 Nov, 2010 12:12 AM

In this research paper, PATH hopes to identify, adapt and develop water treatment devices and business models for water treatment devices for the ecnomically weaker sections of society.

Urban local initiatives and government responses: A case of Dev Nadi in Pune
Most of the rivers and streams in urban India are dead. Race to urbanisation has cost us these once-beautiful water bodies. One story from many - Pune's Dev Nadi Posted on 21 Oct, 2010 01:26 PM

Most of the rivers and streams in urban India are dead. With a very few and rare exceptions, these once-beautiful water bodies have been encroached upon, sources dried up or converted into sewage drains all over the country.Water is being sourced or pumped from sites upstream of the city for its needs or from long distances and the city administration has little incentive for cleaning its own muck. The dismal figures of urban sewage treated by sewage treatment plants, their installed capacity and efficiency stand testimony to this.

Environmental Pollution and Management - A Civil Engineering Course under the National Programme on Technology Enhanced Learning
enhancing the quality of education through specially designed and interactive courses on environmental pollution and management Posted on 13 Oct, 2010 10:32 PM

This Civil Engineering Course under the National Programme on Technology Enhanced Learning (NPTEL) on the broad subject of Environmental Pollution and Management is being carried out by Indian Institute of Technology’s and the Indian Institute of Science, Bangalore as a collaborative project supported by the Ministry of Human Resource Development (Government of India) to enhance the quality of engineering education in the country, by developing curriculum based video and web courses. In these web based lectures, the authors have developed the subject in detail and in stages in a student-friendly manner. The broad group of Environmental Pollution and Management is structured into modules on the following topics: