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
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)
Assessing acute Gastroenteritis risks associated with water quality and sanitation in Hyderabad city - A paper by the Institute of Health Systems (IHS)
The quality of drinking water is a vital element of public health and well-being. The most effective means of consistently ensuring the safety of a drinking-water supply is through the use of a comprehensive risk assessment and risk management approach that encompasses all steps in water supply from catchment to consumer. Posted on 19 Apr, 2011 11:35 PM

The quality of drinking water is a vital element of public health and well-being. The most effective means of consistently ensuring the safety of a drinking-water supply is through the use of a comprehensive risk assessment and risk management approach that encompasses all steps in water supply from catchment to consumer.

WHO guidelines on water quality term these approaches as water safety plans (WSPs), developed to organize, systematize and apply management practices in drinking-water quality.

“Reddy” remedies - A look at the Satwant Reddy Committee report on the issue of pesticide residues in packaged drinking water and packaged natural mineral water - Article from Down to Earth magazine
BIS should have a core group of scientists from various fields to keep track of recent scientific and technical developments in critical areas. Posted on 14 Apr, 2011 10:28 AM

Satwant Reddy committee: Report of the committee on the pesticide residue in packaged drinking water and packaged natural mineral water.

Setting standards

Groundwater use in Aurangabad – A survey and analysis of social significance and policy implications for a medium-sized Indian city by GW MATE and World Bank (2008)
Aurangabad, a city in central Maharashtra is in a drought prone region, and being a rapidly urbanising town, is facing a lot of pressure on ots water resources. Besides importing water there has been an increasing trend of ground water extraction. Posted on 12 Apr, 2011 01:17 AM

Aurangabad, a city in central Maharashtra is in a drought prone region, and being a rapidly urbanising town, is facing a lot of pressure on ots water resources. Besides importing water there has been an increasing trend of ground water extraction.

In this context, a survey of groundwater use was conducted as part of a World Bank study on Indian groundwater management. The study was a collaboration between GW MATE(Groundwater Management Advisory Team) and GRASP (Grass Roots Action for Social Participation), an Aurangabad-based civil society organization working on community-based natural resource management.

Indian standard code of practice for installation of septic tanks (IS: 2470) - Bureau of Indian Standards (1986)
Treating the Sewage and Maintaining health: the IS Code defines the requirements to be met for minimum standards Posted on 11 Apr, 2011 03:46 AM

This IS Code provides various requirements that have to be met while constructing a septic tank, so that it meets minimum standards. This Code is dictated by the Bureau of Indian Standards, and ensures that the sewage is treated in a way that maintains health and hygiene of the community.

While the first standard for small septic tanks was first printed in 1963 and then revised in 1968, the standard for disposal of effluent from septic tanks was published later in 1964 and revised in 1971.

This code has been sourced through City Managers' Association Karnataka (CMAK), a non profit that provides technical expertise to urban local bodies.

Techno-economic feasibility study of sanitation and sewage management for Pandharpur town, Maharashtra - Ecosan Services Foundation (2009)
Solving Pandharpur's Sanitation Crisis. A study into the Maharashtra's holy town rings out interventions to combat its growing problem of water and sanitation Posted on 10 Apr, 2011 02:15 AM

This study provides interventions to solving the sanitation crisis in the holy town of Pandharpur, situated on the banks of the Chandrabagha/Bhima river, in the state of Maharashtra, which receives more than 1.5 crore devotees annually. On any given day there are approximately 20,000 pilgrims in this Class B town. This vast floating population creates massive sanitation problems leading to environmental and hygiene issues.  The study forms part of the Maharashtra State Pollution Control Board's 'Environmental Improvement Programme at Religious Places in Maharashtra' project.

Hoshangabad - Towards city wide sanitation - A draft report by Hoshangabad Nagar Palika Parishad and WSP
This proposal with two-pronged approach ensures sanitation in every household and at the other end, enables a city-wide programme to ensure collection and treatment of waste Posted on 10 Apr, 2011 01:57 AM

 This proposal prepared by Hoshangabad Nagar Palika Parishad, Government of Madhya Pradesh and Water and Sanitation Programme South Asia, is meant to ensure that every household in this town adopts safe sanitation practices and is to help enable the urban local body, implement a city wide sanitation programme that finally ensures collection and treatment of waste.

This document is the tenth mile stone in the process of achieving the goal of city-wide sanitation for Hoshangabad.

Geo-hydrological studies for augmentation of spring discharge in the Western Himalaya – Final technical report by the MOWR
This study examines the geomorphological and anthropogenic influence in the spring recharge zones on spring water quality and discharge Posted on 23 Jan, 2011 04:39 PM

 It is an attempt to understand the effect of rainfall, physiography, lithology, slope and aspect, land use practices, vegetation, altitude, soil type and anthropogenic interference (e.g., road construction and settlement etc.) and other characteristics in the spring recharge zone on the water yield and water quality of the selected springs in the mid-altitudinal belt (lesser Himalaya) in western Himalaya (Uttaranchal).

World Water Monitoring Day, 2010 - Neer Foundation organises water testing program in the northern states of India
NEER Foundation has lifted the torch, to spread the light of knowledge, making people aware about the water quality and its importance. Posted on 21 Jan, 2011 08:17 PM

India is often referred as “The land of rivers”. For generations India has had a strong tradition of preserving water judiciously. Our forefathers were visionaries who had the wisdom of thinking ahead of future. They anticipated the growing population which would lead to an increased demand for water in the future. Like today we have civil engineers, hydrologists and architects, who have acquired knowledge through lesser known or prestigious Institutions, our ancestors carried with them the same inborn talent to preserve water, that too without any formal degrees. They were people of intellect and had great sense of developing natural water resources. In a total of about 6.5 lakh villages of the country, approximately 50 lakh ponds and other similar structures exist. Unfortunately, during the past two decades the water quality has deteriorated at a rapid pace. One of the major reasons for this is the untreated waste water reaching the water sources, turning them to be a dirty drain. The Ganga and the Yamuna, the two most sacred rivers of our country are no exception to it.NEER Foundation This has been achieved though an association with the World Water Monitoring Day program last year.

24th national convention of IPHE (India) on "Water & sanitation utility services in India and their health implications" held in Bhubaneshwar
The 24th National Convention of Institution of Public Health Engineers (India) on the theme “Water & Sanitation Utility Services in India and their health implications” Posted on 18 Jan, 2011 11:49 PM

The 24th National Convention of Institution of Public Health Engineers (India) on the theme “Water & Sanitation Utility Services in India and their health implications” will be organised by IPHE(I), Regional Centre, Bhubaneswar during 12th -13th  February,2011.

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