Hello, better to check ion composition and microbiological parameters before use. For more exact answer please provide information about water temperature on surface.

Please have a look at this old RG discussion thread.

https://www.researchgate.net/post/Is_water_that_had_been_drawn_from_a_800_ft_in_bore_well_safe_for_drinking_purpose

It depends upon from which area you are going to collect the ground water not on depth of the area as ground water pollution is very common these due to rampant use of many harmful chemicals in the form of pesticides or in the form of waste.

Its proven that water from deeper than 400 feet has a high level of poisonous metals.

Hello, better to check ion composition and microbiological parameters before use. For more exact answer please provide information about water temperature on surface.

Only depth cannot be provided whether groundwater is useful or not. Therefore, it is most essential to analyze the all chemical elements including microbiological parameters and heavy metals, then only it may be concluded that this deep groundwater is suitable or unfit for drinking or any other purposes.

General gelogy, Topography, Aquifer charecteristic, recharge potential, land use pattern of the geographical area and other physical factors are responsible for the chemical composition of groundwater. I would like to suggest you should idnetify the geology of the area with mineralogical composition, type of the aquifer, major source and recharge time of aquifer by help of geological data base. Additionally, you have to oversed the manmade activities like mining, agriculture practices, type and depth of sanitry tank, nearness of duping sites and effluent bearing water because these are important anthropenic source of groundwater pollution.

Searching literature may help you up to certain extent, however, Validity should be verified based on the regional geological and geochemical settings in addition to anthropocentric activities as suggested by Balwant Kumar, Adimalla Narsimha and Sandyarani.

Shankar Karuppannan the suitability of water depends on its quality and agreement of its quality parameters with those defined by WHO, US-EPA or other regulatory bodies.

Considering the depth, there are cases where you find cleaner, healthier potable water at greater depths up to 1200 meters as the effect of surface pollutants percolating through the soil is less or have no effect. But at places we don't have fresh water aquifers on such great depths and have connate water or formation water which have high salinity and ions, which is even not good for irrigation purpose.

So on a broader context water quality depends on the host rock it is stored in, as it dissolves almost all elements (universal solvent). Secondly, the depth of fresh water aquifer and formation water in an area. Thirdly, the surface pollutants and their concentration.

Quality of water is important. If water quality is within permissible limit (safe to drink) , than depth may not be considered.

Thank you every body for answering the question. I've got some effective answer. Thank you again for going through the question and answer.

Your welcome!

Balwant kumar saying is correct. The groundwater in salem district many places TDS have with in WHO limits but particular ions have higher concentration above the recommended limits (example Fluoride, Magnesium). So the qulity of groundwater depends on Geology, Topography, Aquifer charecteristic, recharge potential, land use pattern of the area are responsible for the chemical composition of groundwater.

After analysis of all water parameters, microbiological analysis, mainly arsenic, heavy metals, then we can confirm that it is suitable for drinking. Sometimes bad smell come from water, that also hinder its drinking suitability, although it safe on other respect.

Groundwater safety is not necessarily a function of depth but a function of the chemical, microbial, biochemical and physical compositions of water bearing units as well as the underlying and overlying geologic formations. Water units at 1000ft or above may be safe or unsafe depending on the above factors. High concentration of the of the chemical, physical, biochemical or microbial species renders the groundwater unsafe irrespective of the depth. It is therefore necessary to do regular analysis of water samples drawn from different depths in order to determine its safety.

Better assess the quality of water and study the surrounding source before drinking the water.

THE DEPTH, IS NOT, IN ITSELF, THE ONLY DETERMINANT TO GIVE YOU SAFETY THAT THE WATER IS SUITABLE TO DRINK, THEN CAN HAVE WATER IN LOWER DEPTHS AND NOT BE SUITABLE, TO DETERMINE THIS, IT IS NECESSARY TO MAKE AN ANALYSIS OF WATER QUALITY, THE MINIMUM PARAMETERS TO BE ANALYZED WILL DEPEND ON THE OBSERVATION OF POSSIBLE NATURAL OR INDUCED SOURCES OF CONTAMINATION ON THE SITE WHERE THE WATER IS COLLECTED, AS WELL AS ITS GEOHIDROLOGICAL ENVIRONMENT.

Yes , Is it safe to drink groundwater from more than 1000 feet , because the soil permeability is affected by long term use of irrigation water. It is influenced by sodium, calcium, magnesium and bicarbonate contents of soils. Doneen has evolved a criterion for assessing the suitability of water for irrigation based ions in groundwater are with in the permissible limits for drinking except in some places.

Yes, if it is in line with the health standards for safe drinking water.

Groundwater is normally of high quality when the well is located upstream from population centers. The ground acts like a filter to remove microbial contaminants. Chemical constituents such as calcium and manesium could be an issue depending on the underlying geology.

Salem has been known for high fluoride in groundwater. However, the potability of a tube well depends on several factors. It will be free of pathogen but may not be from chemical pollution

I would test the water and not make assumptions (alone) that refer to the depth of the groundwater source....