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

  • Floods are an annual phenomenon in Assam. They are as integral to the state as the Brahmaputra River is, and each monsoon, we are reminded that Assam exists (or is drowning). As I write this piece, Assam is slowly recovering from the first wave of flood this monsoon. For several weeks, the entire st...
    priyadposted 1 day 19 hours agoread more
  •  The East Kolkata Wetlands (EKW) are a truly unique ecosystem, presenting a very different sight from the normal urban landscape in India. What is so unique and different about them, and how have they survived the aggressive growth of Kolkata city? The credit goes to Dr. Dhrubajyoti Ghosh, a...
    aarti kelkar kh...posted 1 week 5 days agoread more
  • Alia, 15, cannot move or talk. “She is totally dependent on me,” said her father Mohammad Asad, an electrician. “Her mother passed away almost nine years back. I have to remain with her most of the time”. Even 35 years after the world’s worst industrial disaster that claimed 3787 lives in...
    priyadposted 1 week 6 days agoread more
  • Centre for Science and Environment (CSE), a New Delhi based non-profit has rated the country’s fertilizer sector on several parameters, in a first of its kind study. The rating, done over an 18-month-long process, covered 28 of the 32 functional fertilizer units in the country. The findings of thi...
    Amita Bhaduriposted 2 weeks 17 hours agoread more
  • Himalayan states demand green bonus and separate ministry from Centre At the recent Conclave of Himalayan States, a separate ministry was demanded to deal with problems endemic to the mountain states, as well as a green bonus in recognition of their contribution to environmental conservation. ...
    swatiposted 2 weeks 6 days agoread more
  • This summer I had the incredible opportunity, to work with the Tata Trusts and their Tata Water Mission (TWM) initiative, exploring avenues to provide scalable water access to stakeholders in rural communities. TWM is one of the Trusts’ flagship initiatives in India, at the forefront of ensuring...
    priyadposted 3 weeks 5 days agoread more
  • Offline iron remover installed for borewell water. After one year, black water comes often. When we cleaned the tank, we found sandy coal like black substance. Could it be due to the wear out of the iron remover or contaminated water.
    Anonymous (not verified)posted 4 weeks 1 day agoread more
  • A Future Earth Conference Opening new frontiers in water system diagnostics and innovative solutions to mitigate the 21st-century global water crisis The Sustainable Water Future Programme (Water Future) of Future Earth is organizing its first international conference in partnership with Divecha C...
    priyadposted 4 weeks 1 day agoread more
  • Chikkaballapur is a district in the state of Karnataka, just north of the capital Bengaluru. A peri-urban area that was once an agricultural centre for this region, today Chikkaballapur is facing a unique problem.  Decreasing rainfall has meant increasing periods of drought for this area, wh...
    priyadposted 1 month 1 week agoread more
  • Prime Minister Modi pitches for a collective effort to overcome water crisis in the country Taking note of the looming water crisis in the country, Prime Minister Narendra Modi has made three requests to the nation during his Mann Ki Baat radio address this past Sunday. He urged all Indians to crea...
    swatiposted 1 month 2 weeks agoread more
  • Hello, I stay at a housing at Doltala, Madhyamgram. There are white deposits on utensils, bottles and the washroom walls and floor and on the taps.Despite regular cleaning the deposits are difficult to remove and develop into scaly deposit with time. The filter that I use, too has deposits. I am no...
    Anonymous (not verified)posted 1 month 2 weeks agoread more
  • The threat of desertification increases in 26 of 29 states As per the State of India's Environment (SoE) 2019 in Figures, between 2003-05 and 2011-13, India has witnessed an increase in the level of desertification in 26 of 29 states. More than 80 percent of the country's degraded land lies in just...
    swatiposted 2 months 3 days agoread more
  • THE ORGANIZATION Splash is an international charitable organization headquartered in Seattle, WA, founded in 2007. Our mission is simple: “We clean water for kids.” Small, young and growing, Splash is in a unique position to be groundbreaking in the global health and WASH sectors, able to try n...
    priyadposted 2 months 1 week agoread more
  • Can STP water after aeration and filtration be used for groundwater recharging?
    Anonymous (not verified)posted 2 months 2 weeks agoread more
  • Jal Shakti ministry formed by merging water ministry and drinking water ministry The government has launched the new Jal Shakti ministry by merging the Ministry of Water Resources, River Development and Ganga Rejuvenation and Ministry of Drinking Water and Sanitation. Gajendra Singh Shekhawat has b...
    swatiposted 2 months 2 weeks agoread more
  • RO water is causing vitamin D deficiency epidemic. What are the healthier alternatives?
    Anonymous (not verified)posted 2 months 2 weeks agoread more
  • At most inter-state boundaries, Ganga's faecal coliform level exceeds limit As per the data released by the Central Pollution Control Board (CPCB), the faecal coliform level in the Ganga river is found to be three to 12 times higher than the permissible level at most inter-state boundaries. At 12 t...
    swatiposted 2 months 3 weeks agoread more
  • Tamil Nadu is one of the most water-vulnerable states in India that depends heavily on groundwater for irrigation. As high as 56 percent of land in the state is currently irrigated by groundwater and the remaining by tanks and canals. The provision of subsidies by the state government for irrigation...
    aarti kelkar kh...posted 2 months 4 weeks agoread more
  • I will be shifting to a building soon, where the TDS of water ranges from 300 to 400. There is no municipal connection and the community has a water treatment plant. The water coming in the taps is softened to some extent. In such a scenario do I need a RO system or should I get a water filter? Most...
    Anonymous (not verified)posted 3 months 3 days agoread more
  • In our industry, we are having RO system and 30 percent of wastewater is being produced by this system. I checked the TDS of wastewater and it was 3200 ppm. Now I would like to use this wastewater for growing plants. Could you suggest a few varieties that would be able to thrive at this level of TDS...
    Anonymous (not verified)posted 3 months 5 days agoread more

Pages

Mitul Baruah from Ashoka University narrates personal experiences of people affected by floods in Majuli, Assam.

Floods are an annual phenomenon in Assam. They are as integral to the state as the Brahmaputra River is, and each monsoon, we are reminded that Assam exists (or is drowning). As I write this piece, Assam is slowly recovering from the first wave of flood this monsoon.

Topics

Sub-Categories

Regions

A real estate boom is tightening its grip on the East Kolkata Wetlands, a unique waste processing ecosystem. Cooperation and coproduction, not conflict are needed to save them.

 The East Kolkata Wetlands (EKW) are a truly unique ecosystem, presenting a very different sight from the normal urban landscape in India.

Topics

Sub-Categories

Regions

Bhopal Gas Leak: Long Term Impact

Alia, 15, cannot move or talk. “She is totally dependent on me,” said her father Mohammad Asad, an electrician. “Her mother passed away almost nine years back. I have to remain with her most of the time”.

Topics

Sub-Categories

Regions

A recent report by CSE rates fertilizer plants on how green the sector is.

Centre for Science and Environment (CSE), a New Delhi based non-profit has rated the country’s fertilizer sector on several parameters, in a first of its kind study. The rating, done over an 18-month-long process, covered 28 of the 32 functional fertilizer units in the country. The findings of this green rating project were shared during the release of this rating report on 29th July, 2019 in New Delhi.

Topics

Sub-Categories

Regions

News this week

Himalayan states demand green bonus and separate ministry from Centre

Topics

Sub-Categories

Regions

A young college graduate shares his experience working with Tata Trusts in Assam on water issues.

Topics

Sub-Categories

Regions

Offline iron remover installed for borewell water. After one year, black water comes often. When we cleaned the tank, we found sandy coal like black substance. Could it be due to the wear out of the iron remover or contaminated water.

Topics

Sub-Categories

Regions

A Future Earth Conference

Opening new frontiers in water system diagnostics and innovative solutions to mitigate the 21st-century global water crisis

September 24, 2019 9:00AM - September 27, 2019 6:00PM
August 31, 2019 12:00PM

Topics

Sub-Categories

Regions

INREM Foundation and The Fluoride Network have worked in Chikkaballapur extensively, to battle the problem of fluoride contamination in groundwater.

Chikkaballapur is a district in the state of Karnataka, just north of the capital Bengaluru. A peri-urban area that was once an agricultural centre for this region, today Chikkaballapur is facing a unique problem. 

Decreasing rainfall has meant increasing periods of drought for this area, which in turn has caused residents to dig deeper and deeper in search of water. In this pursuit for groundwater, they have found water… but it is contaminated with fluoride.

Topics

Sub-Categories

Regions

News this week

Prime Minister Modi pitches for a collective effort to overcome water crisis in the country

Topics

Sub-Categories

Regions

Pages

Subscribe to RSS - Quality, Standards and Testing