How Water Quality Varies Across Indian Cities and What You Can Do About It
Introduction
Drinking water is essential for all Indian households. But water quality varies across cities & neighborhoods within a city. Differences in water sources, groundwater quality, seasons, infrastructure, and local pollution levels influence the quality of water at your tap. A reason why brands or technology alone should not decide your choice of a water purifier.
Knowing the water quality at the household level can help consumers select the most appropriate purifier.
How does water quality differ between Indian cities?
Indian urban areas have several sources of drinking water-public supplies, groundwater, borewells, lakes and rivers, all of which can vary regionally. For example, some areas have high saline and mineral content in groundwater, while surface supplies may require tertiary treatment for bacteria and other organisms.
In addition, Aging of pipeline networks or storage tanks may also influence the water quality before it supplies to your home.
These differences can be amplified by seasonal effects, for instance, heavy precipitation can cause increased turbidity, and low precipitation can lead to increased dependence on groundwater. Thus, there is no single technology that will necessarily be suitable for all Indian households.
Water Quality in Major Indian Cities
Bengaluru
Households in Bengaluru are served by municipal water, supplemented by borewells or private water sources.
If most of the family is using borewells, then there can be high mineral content and hardness. Choose a water purification system depending on your water source and water quality, for example:
Chennai
Chennai is fed by groundwater, and municipal sources.
Changes from neighborhood to neighborhood may be common, particularly where groundwater or other sources of alternative resources are involved.
Water that is low in dissolved solids can be filtered by purification systems that retain good minerals and eliminate organisms, depending on source.
Delhi
In Delhi, households receive city water mixed with groundwater which could be different from area to area. Hardness, solids, and aging piping might be an issue. Home testing can show what might need to be filtered.
Mumbai
Mumbai relies heavily on surface supplies for their drinking water.
However, storage conditions and household plumbing and tanks can affect the water quality at the point of use. Proper maintenance of storage and purification systems is crucial for consumers.
Hyderabad
Hyderabad uses surface supplies and ground water.
Depending upon the location groundwater could be high in minerals and heavily hard. It helps to know the source of water when selecting a purifier.
Kolkata
Various sources of water can be treated for surface and groundwater.
Distribution systems and household tanks may influence the quality of water delivered to the tap.
The source of your water will determine the type of purifier you should purchase.
Pune
Pune neighborhoods receive municipal water, groundwater or even both. Variable parameters may alter water quality in the neighborhood, including when borewell water is involved. Testing can highlight main issues like dissolved solids, hardness, microbial pollution etc.
What are common water quality concerns?
Water quality is not always expressed as “clarity”. Some problems can’t be seen or tasted. Typical problems to look for are:
- Too high Dissolved Content:– The minerals and salts dissolved in the water can affect taste, can be a sign of treatment needs
- Hard Water:– Heavy calcium and magnesium concentrations can build up scale within your home water system
- Microbial Contamination:– The presence of bacteria, virus and microbes can be a serious health risk
- Turbidity:– the cloudy condition of the water can be a sign of filtration needs
- Excess Iron and Minerals:– The Ground Water with high mineral concentrations can impact on the taste and appearance of water and can cause scale within the home water system.
- Bacterial and microbial contamination:– Distribution system and storage tanks can recontaminate water after treatment
For this reason, it is much more valuable to identify the problem than simply go for a popular water purifier technology.
What should I look for in a water purifier
First, identify your source of water.
Is it municipal, borewell, groundwater, tanker, or combination?
Next, you may want to have your water tested.
Analysis of factors such as TDS, hardness, pH, turbidity and microbiological load can provide valuable information about what might be in your water.
Your potential technology can then be matched to your targeted purification needs.
RO purifiers
RO technology deploys a semi-permeable membrane to block dissolved content and is often used for water with high dissolved content.
UV Purifiers
Ultraviolet treatment utilizes UV light to kill microorganisms.
The technology may be suggested when the issue is microbial as opposed to dissolved.
UF Purifiers
The ultrafiltration system employs a membrane to remove microbes and suspended particles. It can be integrated into a purification system.
Multi-stage purification
Sometimes a multi-stage system is preferable for a home – combining sediment filtration, activated carbon, RO, UV, or other methods.
But be aware that more filtration does not necessarily equate to better water – the method of filtration should relate to your source water quality.
Do not select a purifier on TDS alone
TDS is a useful indicator of water quality but it should not be the sole measure you consider when choosing a purifier. A TDS meter can give the level of dissolved solids but not what organics or inorganics are there and if the water is microbiologically safe.
Two households with the same TDS reading may even need to adopt two totally different approaches to water purification.
Thus, it is preferable to take measurements of a water source for example, rather than just a number.
Regular maintenance – a necessity
A good system may not operate effectively if not maintained. Routine cleaning of all components including filters and membranes is necessary for long term operation. Storage tanks and household plumbing should also be checked if water quality remains poor following treatment.
Conclusion
The diverse landscapes, water sources, and infrastructure across India mean that water quality can vary significantly from one city to another and even between neighborhoods. Choosing the right water purifier should therefore depend on the quality and source of your water rather than simply following a popular purification technology.
Understanding your water quality, knowing the limits of different purification methods, and considering your household’s specific needs can help you make a more informed choice. DrinkPrime focuses on helping households choose water purification solutions based on their water quality and requirements, making it easier to find a suitable approach for cleaner and safer drinking water at home.