Abstract
Groundwater is a vital and purest form of natural resource. In the recent years, various anthropogenic causes threat its natural quality. Therefore, its suitability for drinking, irrigation and other purposes make doubtful conditions of human well-being, especially in developing countries. In this present study, groundwater quality was evaluated for drinking, irrigation and human health hazard purposes particularly in Chotanagpur plateau fringe of India. In total, 58 water samples were collected from different locations in pre-monsoon (February–March 2020) and post-monsoon (October–November 2020) seasons to delineate seasonal variation of groundwater quality according to as reported by WHO (WHO guidelines for drinking-water quality, World Health Organization, Geneva, 2011) guidelines. Groundwater Quality Index (GWQI) and Heavy metal Pollution Index (HPI) have been applied to assess the suitability of drinking purposes. Irrigation parameters (SAR, SSP, MAR, PI, KR) showed the significant deterioration of water quality in pre-monsoon than post-monsoon period. Major cations (such as sodium, calcium) and major anions (such as bicarbonate, nitrate and fluoride) exceeded their standard limit in both the seasons. Non-carcinogenic health risk is found due to heavy metal contamination through drinking water. The health risk index was higher for children in comparison with adults. This research finding can definitely help to planners and administrators for immediate decision making regarding public health (for groundwater quality improvement).
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Introduction
In the pre-industrial era, surface and subsurface water was considered as safe for drinking and human welfare. No such significant negative impression of water quality and related environmental hazard was found during that period. After industrial revolution in eighteenth century, uncontrolled development of anthropogenic activities leads water resources vulnerable through contamination of various pollutants (Al-Sudani 2019). Population explosion, over-exploitation and inappropriate usages of chemicals in different sectors continuously threat the precious natural resource. Once groundwater (GW) was purest form of water resource, but today, the quality is being deteriorated day by day and exposed to human health risk due to improper knowledge and management. Generally, quality of GW depends on physiochemical properties of aquifer and its composition. This state is controlled by the properties of soil and rocks of aquifer media (Acheampong and Hess 1998; Foster et al. 2000; Raji and Alagbe 1997). Different hydrogeochemical process determines different physicochemical characteristics of GW particularly in the zone of saturation (Islam et al. 2017a; Ahmed et al. 2020; Bhuiyan et al. 2016). Chemical components of industrial, agricultural, urban sewage, mining extracts are the main causes of high pollutant contamination in GW (Amirabdollahian and Datta 2013; Carpenter et al. 1998; Simeonov et al. 2003). Many previous studies were conducted on assessment of GW pollution in different parts of the world and find significant deterioration in water quality for drinking and irrigation purposes in recent times (Al- Futaisi et al. 2007; Pritchard et al. 2008; Jalali 2006; Bhunia et al. 2018). Groundwater unsuitability for drinking and irrigation purposes in Volta River basin of Ghana was analyzed by Kaka et al. 2011. Jennings et al. (1997) showed the increased level of nitrates in GW and its negative impact on human health. Al- Sudani (2003) assessed GW quality of Debagah basin in Iran and found higher contamination of anions, nitrates and salinity from agricultural source. Kong et al (2004) analyzed GW quality of agricultural field in Hebei and Shandong, and it indicated the deterioration of quality of groundwater due to high mixing of pesticides in GW. Rapid water quality deterioration and unsuitability for drinking or irrigation is a burning issue in most of the developing countries. Rapid population explosion, high yielding varieties of crop cultivation, excessive application of chemical fertilizers, pesticides, fungicides and herbicides, urban and industrial effluents and improper management are the principal cases of groundwater pollution particularly in developing countries (Nagaraju et al. 2018; Shaji et al. 2018). Several studies reported that the magnitude of GWP has been amplified by both natural and anthropogenic sources in Bangladesh (Hasan et al. 2019; Kabir et al. 2021; Islam et al. 2020). In India, GW plays a significant role particularly in domestic and irrigation sectors. It has been reported that GW uses nearly 80% for domestic use in rural areas and approximately 50% in urban areas (Kundu and Nag 2018). In India, around 50% of agricultural lands depend on groundwater irrigation (Central Water Commission 2006). But in the recent years, this most valuable resource is going to vulnerable for human consumption. Many studies were conducted in this approach. Water quality of coastal aquifers in Tamil Nadu state, India, was assessed for its hydrochemical condition and suitability of human consumption (Chandrasekar et al. 2014). Similarly, groundwater quality of an agricultural region of Uttar Pradesh, India, was assessed for drinking suitability (Ashwini and Abhay 2014). Degree of GWP in rural areas of Telangana state was showed that major cations and anions along with their permissible limit were exceeded due to high activity of geogenic condition and anthropogenic contamination (Subba Rao et al. 2018). Gautam et al. 2015 analyzed GWQ of Subarnarekha River basin of Chotonagpur region and explained large-scale release of ions through weathering and agricultural practices. Satish Kumar et al. (2016) assessed GWQ of hard rock aquifer of Pudunagaram, Palakkad district of Kerala, and indicated most of water samples were suitable for drinking and irrigation purposes, though some samples were higher than their standard limit due to anthropogenic contribution. Groundwater quality (GWQ) of Bankura I and Bankura II blocks of West Bengal indicated moderately suitable for drinking and irrigation purposes except some places (Nag and Das 2017). The most warning problem related to GW pollution is its adverse impact on human health in developing countries. Regular intake of toxic elements (heavy metals) accelerates chronic non-carcinogenic or carcinogenic diseases of humans (Tasneem et al. 2021; Ahmed et al. 2021; Mridul et al. 2020). In developing countries, poor drinking water and unhealthy sanitary system are responsible for 80% water borne diseases reported by UNESCO 2007. Health risk assessment on an agricultural region of Nanganur, South India, showed higher health risk (non-carcinogenic) of children than adult by intake of nitrate in drinking water (Adimalla and Qian, 2019). Adimalla and Wu (2018) assessed non-carcinogenic health risk of central Telangana and showed that infant was most exposed to health risk by ingestion of nitrate and fluoride in drinking water. Therefore, it is highly required to assess the GWQ for drinking, irrigation and human health particularly in developing countries and it needs for implementation of sustainable development practice (Islam et al. 2020). As quality of groundwater depends on numerous physiochemical parameters, it is quite hard to deal with large dataset. In this case, it is revealed that Water Quality Index (WQI) is the most suitable technique to evaluate water quality standard. In this process, different weightage values are assigned for different parameters according to their relative importance on overall groundwater quality (Singh et al. 2018; Shahid et al. 2014). WQI is an appropriate technique to determine GWQ depending on physiochemical parameters for drinking purpose. Therefore, Heavy Metal Pollution Index (HPI) is necessary to assess drinking water quality on the basis of toxic metal contamination (Edet and Offiong 2002; Sultana et al. 2016; Rikta et al. 2016; Ojekunle et al. 2016; Karunanidhi et al. 2020). Many relevant studies on groundwater quality (GWQ) of irrigation suitability has been assessed by different indices such as sodium adsorption ratio (SAR), permeability index (PI), soluble sodium percentage (SSP), Kelly’s ratio (KR) and magnesium adsorption ratio (MAR) and along with using different ionic concentration in GW (Ashraf and Afzal 2011; Kundu and Nag 2018; Chakraborty et al. 2021a, b, c). In the recent years, modern scientific techniques are applied with the combination of traditional methods particularly in applied research. Application of remote sensing and spatial zonation by GIS techniques easily helped to identify the pollution pockets of GW and associated health risk (HR) (Taheri et al. 2015; Singh et al. 2015; Thapa et al. 2017).
Our present study area is located in Santuri block of Purulia district of West Bengal. It is situated at fringe area of Chotanagpur plateau, and geomorphologically, it is an undulating terrain with Precambrian granite gneiss residual hillocks. Some medium-sized iron-based industries and secondary activities have been grown in the recent decades. High demand of groundwater for drinking and agricultural purposes emerges severe water crisis in this area day by day. Prior study on groundwater quality of its adjacent block Neturia showed that anthropogenic sources are responsible for groundwater contamination along with some natural factors and study also identified magnitude of health hazard through consuming high amount of iron and fluoride in drinking water (Chakraborty et al. 2021a, b, c). But no such previous study was found on groundwater quality with an integrated approach in any part of the country, especially on eastern fringe of Chotanagpur region. Therefore, the principal objective of this study is to i) evaluate hydrochemical characteristics of groundwater and ii) assess the GWQ suitability for drinking, irrigation and non-carcinogenic health risk of humans using GIS techniques and research also highlights some sustainable remedial measures for regional planners and local people.
Materials and methods
Study area
Santuri Block is situated in the northeastern part of Purulia district within geographical extension 23°27′43″ N/ 86°45′50″N to 23°39′35″N/ 86°54′33″N with 179.69 km2 area (Fig. 1). Damodar River is the northern boundary of Santuri Block as well as Purulia district. Geological or more specifically lithology of this block is composed by Gondowana crystalline rock formation, granite gneiss, mica schist. Meta basic rocks are also found in some places along with lineaments. Geomorphologically, it is an undulating plateau with plain, and generally, slope of the land is toward east. Annual temperature is varying between 4 and 45 °C. Annual rainfall is recorded within the range 1100–1400 mm. Topsoil is characterized by weathered laterites along with sandy residue. Agriculture is mostly being practiced by the river water (Damodar) and dam. Groundwater is the main source of drinking water in this block. Pit well, dug well, bore well, etc. are common structural modes of extraction from groundwater aquifer.
Sample collection and procedures
Groundwater samples were collected from 29 bore wells of different location in pre-monsoon (February–March) and post-monsoon (October–November) of the year 2020 (Fig. 1). Sampling locations were recorded by portable GPS instrument (GARMIN GPS map 78 s). Each bottle of 500 ml was deionized by 1: 1 hydrochloric acid and thoroughly cleaned by sampling water of respective site. After sampling, all bottles were labeled accordingly and sealed with plastic coat for prevention of evaporation and carried to laboratory within 24 h. Similarly, pH and EC were measured by their portable meters in situ (Hanna). TDS was measured by multiplying EC with 0.64 (Hem 1991). All chemical parameters were analyzed by the recommended method of American Public Health Association (APHA 2012). TH and cations as Ca2+ and Mg2+ were measured by EDTA titration method (0.05 N and 0.01 N, respectively). Na2+ and K+ were measured by flame photometer method. Anions as Cl− and Hco3− were obtained by volumetric method. So4−, No3− and F− were estimated by spectrophotometric method (Chakraborty et al. 2021a, b, c). All concentrations were expressed in mg/l except pH and EC. Heavy metals like iron, chromium, manganese, cadmium, zinc, copper, lead and nickel were estimated by anodic stripping voltammetry (VA 797, Switzerland) using three types of pulse analyzer. Voltametric pulse peak was recorded in a window computer (Chakraborty et al. 2020). All heavy metals are expressed in µg/l.
Ionic balance was conducted for each groundwater samples in quality assurance of chemical analysis (Huh et al. 1998). In this process, ionic concentration of all chemicals was converted into meq/l and estimated ionic balance by the following equation
Groundwater quality index (GWQI)
Groundwater quality index or GWQI can easily determine overall groundwater quality on the basis of physicochemical parameters of water sample for drinking. GWQI has been conducted using the following formula (Vasanthavigar et al. 2010; Islam et al. 2017b).
Variables, their assigned weight and standard values of parameters for GWQI calculation are given in Table 1 (Vasanthavigar et al. 2010; Chakraborty et al. 2021a, b, c).
Heavy metal pollution index (HPI)
HPI has been used to evaluate water quality and its suitability for drinking (Rezaei et al. 2017). HPI has been calculated applying the formula.
where Wi indicates weightage of each metal, MAC indicates Maximum Allowable Concen tration of each metal as suggested by Bureau of Indian Standard (BIS 2012). ‘K’ is constant value, Qi shows quality rating of each metal, Mi denotes measured concentration of respective heavy metal, Ii is ideal value and Si is standard value of each metal as prescribed by BIS 2012. The critical value of heavy metal pollution index is 100. HPI > 1 indicates unsuitable for drinking purpose.
Irrigation water quality
Irrigation water quality of Santuri block was determined by various indices using certain chemical parameters which are as follows: (Richards 1954), (Todd 1980), (Doneen 1964), (Raghunath 1987), (Kelly 1976)
All ionic concentrations were calculated by meq/l.
Human health risk (HHR)
Human non-carcinogenic health risks (via oral consumption) of heavy metals in drinking water were evaluated for children and adult residents of Santuri block. Traditional USEPA (2011) method was applied using the following formulas.
where CDIoral is chronic daily dose intake via oral pathway and expressed in µg/kg/day. Cw is respective concentration in sample water (µg/l). IR is ingestion rate of water (0.70 lit for children and 2 lit for adult), EF is exposure frequency (365 days) for children and adult, respectively). BW denotes body weight of children (15 kg) and adult (70 kg), AT is average time (2190 days for children and 10,950 days for adult), and RfD (µg/kg/day) represents reference dose of heavy metals in drinking water suggested by USEPA (2011). HQ indicates Hazard Quotient (unitless) and HI signifies Hazard Index (unitless). HI value < 1 suggests no immediate health hazard, and HI > 1 shows possibilities of health hazard in the assessed area (Yang et al. 2012).
Statistical and spatial techniques
Descriptive statistics and index analysis were applied applying SPSS 16 software. Spatial mapping of water quality in pre- and post-monsoon season was performed using inverse distance weighted (IDW) method in ArcGIS 10.4 software. IDW is such useful technique which is used to interpolate of cell values by linear weighted combination of a sample point (Adhikary et al. 2011; Bhunia et al. 2018). In this method, best prediction of neighboring samples value was obtained from observed data and estimated data (Yao et al. 2013).
Results and discussion
General hydrochemistry of the groundwater
The statistical summary of groundwater samples in pre-monsoon season (Table 2) showed that the mean concentration of pH (7.66), EC (1100.00), TDS (704) stands acceptable limit according to WHO (2011) guidelines and indicated weak alkaline-type water. Total hardness (TH) exceeded its permissible limit in this season. During post-monsoon season, mean value of pH (7.46), EC (847.03) and TDS (542.10) also showed the permissible limit. In this period, TH was below permissible limit due to high availability of water supply in subsurface area. In both pre- and post-monsoon seasons, cation concentration of GW was in an order of Na2+ > Ca2+ > Mg2+ > K+ by their mean values. Anion was in their descending order of Hco3− > No3− > Cl− > So4− > F−. Na2+ and Ca2+ exceeded their permissible limit in groundwater. It can be due to higher ionic modification between these two cations and weathering of silicate minerals (Islam et al. 2017a). On the other hand, Hco3− (508.48), No3− (104.83) and F− (2.63) crossed their upper permissible limit because of agricultural fertilizer and pesticides contamination in groundwater. Geologically, the region is composed by fluoride-bearing host rocks and minerals. Therefore, natural concentration and contamination of F− has been increased in GW. The presence of Cl− and SO4− in the aquifer system was due to weathering of silicate minerals and gypsum (Fisher and Mullican Iii 1997). Mean concentration of heavy metals in groundwater of pre- and post-monsoon season showed their descending order of accumulation as Fe > Mn > Zn > Pb > Ni > Cr > Cu > Cd. Natural weathering of iron-rich minerals and mixing of agricultural, industrial effluents with subsurface water are the main causes of higher availability of heavy metals in this area. In both the seasons, all heavy metals exceeded their acceptable limit according to BIS (2012).
Ionic balance of 29 sample water in pre-monsoon showed that no sample was fresh type (value between −10% and + 10%) in this season. In post-monsoon season, 31.03% sample indicated fresh or good type water with low TDS value by their ionic concentration (Table 3).
Groundwater quality index
Groundwater quality of Santuri block showed the range from 132.19 to 210.63 with 171.22 mean value. In this season, 76.66% water samples were ‘poor’ quality and 23.33% were ‘very poor’ quality of groundwater (Table 3). On the other hand, GWQI of post-monsoon season showed the ranges from 79.92 to 123.28 with 96.49 mean value. 66.66% groundwater samples appeared as ‘good’ quality and 33.33% water samples appeared as ‘poor’ quality for drinking purpose in post-monsoon. In pre-monsoon, lowering down of groundwater quality is mainly due to increase in ionic exchange activities in aquifer zone. But in post-monsoon season, higher availability of water recharge helped to ameliorate water quality for drinking purpose. Similar results have been found in previous researches on groundwater quality of Purulia district (Kundu and Nag 2018; Chakraborty et al. 2021a, b, c). Spatial pattern of GWQI showed (Fig. 2) deterioration of water quality in industrial belt of northern part of Santuri block.
Heavy metal pollution index (HPI)
Drinking water suitability on the basis of heavy metal contamination of Santuri block by HPI method showed the ranges from 82.56 to 197.11 with 142.28 mean value in pre-monsoon season. Around 93.34% and 6.66% sample water was observed as highly and no pollution particularly in monsoon season (Table 3). In post-monsoon season, HPI was ranging from 32.31 to 113.80 with 58.43 mean value. In this season, 6.66% water sample indicated ‘high pollution’ and 93.34% samples indicated ‘no pollution’ (HPI < 100) for drinking purpose. In pre-monsoon season, higher leaching of heavy metals by irrigated water increased metal contamination than post-monsoon season. Spatial distribution of HPI was classified into three categories as no pollution (HPI < 100), medium pollution (HPI = 100–150) and high pollution (HPI > 150) and it showed that the northern and eastern part of this block was highly polluted by heavy metal contamination in pre-monsoon season (Fig. 2).
Assessment of irrigation water quality
Irrigation water is mixed with excess chemical components originated by either geogenic or anthropogenic factors which can negatively affect to the soil fertility, water permeability and crop production efficiency (Jalali 2009). Excess supply of irrigation water in agricultural field is generally responsible for existence of alkalis and salt on the top layer of soil and it provides salt to the crop roots (Jalali 2011). In this context, irrigation water quality of Santuri block has been assessed through SAR, SSP, PI, MAR, KR to determine chemical effects on crop production in this block (Liu et al. 2021).
Sodium adsorption ratio (SAR)
Excess concentration of sodium in GW produces alkaline-type soil. It increases soil compactness and lowered down percolation capacity of rain water into soil. Alkaline soil is considered as poor quality for agricultural production without irrigation. Cultivation is difficult in this type of soil particularly in dry period. In Santuri block, irrigation water quality by SAR showed the range from 4.53 to 13.04 with 7.12 mean value in pre-monsoon season. In post-monsoon season, SAR ranged from 0.87 to 11.77 with 3.83 mean value. In both the seasons, 93.10% samples were under ‘excellent’ quality and 6.89% ‘good’ quality samples were observed (Table 3). The increase in ionic interactions, climatic influence, leaching of fertilizer, pesticides from topsoil by irrigated water promotes SAR in groundwater in pre-monsoon season. Overall groundwater of Santuri block suggested water suitability for crop production (by SAR method). Spatial pattern of SAR in pre- and post-monsoon season is presented in Fig. 3.
Soluble sodium percentage (SSP)
Irrigation water is mixed with high sodium content which can be absorbed by clay minerals as a dispersing for calcium and magnesium ions. It makes soil harder, reduces the water infiltration rate and leads to low crop production capacity of soil (Singh et al. 2008). SSP analyzed the GW of pre-monsoon season that is ranged from 53.77 to 76.80 with 63.70 mean value. In this period, 20.68% samples showed ‘permissible’ water and 79.31% sample showed ‘doubtful’ for irrigation purpose (Table 3). In post-monsoon season, SSP is ranged from 19.02 to 74.58 with 42.82 mean value. In this period, 48.27% samples indicated ‘good’ for irrigation. 10.34% samples showed excellent for crop production while 41.37% samples presented ‘permissible’ for agricultural usages. Mean SSP of pre-monsoon was higher than post-monsoon season and it indicated lower suitability of groundwater for irrigation in pre-monsoon. Spatial distribution of SSP in pre- and post-monsoon season of Santuri block is presented in Fig. 3.
Permeability index (PI)
Sodium, calcium, bicarbonate and magnesium ions are the main controlling factors of permeability of soil. Permeability Index showed the quality of GW to soil permeability in any region. PI of pre-monsoon season showed the range from 79.66 to 114.80 with 94.59 mean value. 3.44% sample water showed ‘good’ for soil permeability. 72.41% sample showed ‘moderate’ for soil permeability and 24.13% sample indicated ‘poor’ for soil permeability (Table 3). In post-monsoon season, PI ranged from 49.06 to 152.25 with 95.94 mean value. 31.03% samples indicated ‘good’ quality while 31.03% samples showed ‘moderate’ quality and 37.93% sample indicated ‘poor’ quality for permeability. Spatial distribution of PI in the study area is presented in Fig. 3.
Magnesium adsorption ratio (MAR)
Suitable quantity of magnesium ion is very helpful for plant growth. But high availability of Mg2+ affects the plant health and reduces soil infiltration rate. High level of magnesium can decrease the presence of K+ in soil. Therefore, MAR is suggested for groundwater irrigation (Kacmaz and Nakoman 2009) in the study area. MAR of pre-monsoon is ranged from 17.39 to 37.43 with 26.92 mean value. In post-monsoon, MAR is ranged from 10.45 to 46.10 with 22.99 mean value. In both seasons, 100% sample water indicated suitability of GW in respect of magnesium content for irrigation purpose (Table 3). Spatial zonation of MAR in Santuri block is presented in Fig. 3.
Kelley’s ratio (KR)
Kelley’s ratio is based on sodium availability of groundwater for irrigation. Sodium mainly is originated from natural weathering of feldspar minerals. KR > 1 suggests higher sodium content and unsuitability for irrigation. In pre-monsoon season, KR is ranged from 1.13 to 3.26 with 1.78 mean value. 100% sample of this season indicated KR > 1, hence unsuitability for irrigation (Table 3). In post-monsoon season, KR is ranged from 0.21 to 2.92 with 0.95 mean value. 68.96% water samples showed KR > 1, i.e., ‘suitable’ and 31.03% sample showed KR < 1, i.e., ‘unsuitable’ for agricultural purpose. Spatial pattern of KR is presented in Fig. 4.
Assessment of human health risk (HHR)
Toxicity of groundwater on the basis of heavy metal consumption via oral ingestion of drinking water can give significant impact on human health (Rasool et al. 2017; Ahmed et al. 2019). Long-term ingestion of heavy metals can cause chronic non-carcinogenic or carcinogenic-type diseases (Islam et al. 2019). In the Santuri block, susceptibility of non-carcinogenic health risk by ingestion of groundwater was evaluated for both children and adult population. Heavy metal such as Fe, Cr, Cd, Zn, Mn, Cu and Pb were considered for health risk assessment. The total HI (Hazard Index) value of children in pre-monsoon and post-monsoon was ranged from 0.68 to 1.49 with 1.14 mean value and 0.28 to 1.21 with 0.50 mean value, respectively. Mean value of HI (children) of pre-monsoon was higher (HI > 1) than post-monsoon (HI < 1) which indicated more potentiality to health hazard during pre-monsoon season. In pre-monsoon, 27.58% samples indicated HI < 1 and suggested no immediate health risk in this region. 72.40% water sample showed HI > 1 and indicated health hazard of children during this period (Table 4). HI values of post-monsoon season indicated that 100% samples were safe for drinking and no possibilities of health risk of children in this season.
During pre-monsoon, HI values of adults ranged from 0.43 to 0.94 with 0.71 mean value. In post-monsoon, HI of adults ranged from 0.17 to 0.74 with 0.31 mean value. 100% samples of both seasons indicated safe for oral consume (HI < 1) for adult population. Children were found more susceptible to health hazard than adult in this block as indicated by their average values. This is because of children have lower body weight and low metabolism power than adults. Similar results have been found in previous studies also (Kabir et al. 2020; Ojekunle et al. 2016; Tiwari et al. 2015; Sharma et al. 2019; Chakraborty et al. 2021a, b, c). Spatial interpolation mapping showed that high health risk was found in industrially developed northern part of Santuri block (Fig. 4).
Remedial techniques
Safe and healthy groundwater is always desirable for people of green globe. It ensures human health and hygiene and also protects the environment. Good quality of groundwater helps to promote crop growth and it maintains soil quality. Therefore, appropriate monitoring and innovative measurement techniques are effective weapon for sustainable natural resource management. There are mainly two types of remediation techniques in this field, i.e., in situ and ex situ. In situ process is involved for groundwater treatment by different thermal, biological or chemical techniques within the aquifer. Ex situ process involves the water treatment by extracting contaminated groundwater from aquifer. Generally, two methods are highly expensive. Therefore, some cost-effective and efficient remediation will be more helpful for common people and government of developing countries.
Conclusion
The present study on groundwater quality of Santuri block of Purulia district has been analyzed for suitability of drinking, irrigation and human health s in different seasons. The analytical result of groundwater hydrochemistry showed that the GW is mainly low alkaline type with acceptable concentration of EC and TDS in both seasons. High concentration of Na2 + , Ca2 + in groundwater was due to weathering of silicate minerals. Agricultural activities lead to an increase in the level of Hco3-, No3- and F- in groundwater. Heavy metals like iron and manganese are found higher amount than their standard limit because of weathering of parent rocks in this region. Various ions are released from the weathered hillocks and these are being mixed in the soil and water. Drinking water suitability by GWQI and HPI showed the significant deterioration of water quality in pre-monsoon in comparison with post-monsoon. Irrigation water quality (by SAR, SSP, PI, MAR, KI) gives overall suitability of GW for agricultural practices. However, groundwater of pre-monsoon has low suitability than post-monsoon due to amplification of ionic activities in summer season. Human health risk of non-carcinogenic diseases suggested that children were more vulnerable than adult in this block and obvious health risk was found for children (HI > 1) particularly in pre-monsoon season. This applied research will assist to policy makers and government will take necessary steps for the improvement of public health applying emergency mitigation measures. There is a huge scope for scholars and researchers to find out a new innovative ideas and models considering the natural hydrogeomorphic diversity and modern societal integrity.
Data availability
The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors show their kind acknowledgment to the Department of Geography and Microbiology, Raja N. L. Khan Women’s College (Autonomous), Department of Geology & Geophysics, Indian Institute of Technology (IIT), Kharagpur, West Bengal, India, for their laboratory facilities and kind encouragement.
Funding
This research was supported by the Department of Geography, Raja N. L. Khan Women’s College (Autonomous), affiliated to Vidyasagar University, Midnapore, West Bengal, India. The author (P. K. Shit) grateful acknowledges West Bengal DSTBT for financial support through R&D Research Project Memo no. 104(Sanc.)/ST/P/S&T/ 10G-5/2018).
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P.K.Shit conceptualized and planned the study and reviewed and edited the manuscript. B. Chakraborty conducted the survey and water sampling, analyzed the data and interpreted the results. S.Roy conducted the survey, water sampling, prepared the maps. S. Bhattacharjee reviewed and edited the manuscript. P.P.Adhikary reviewed and edited the manuscript. B. Bera supervised the study and reviewed and edited the manuscript. D. Sengupta supervised the overall research, interpreted the results. All authors have read and approved the final manuscript.
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Chakraborty, B., Roy, S., Bera, B. et al. Evaluation of groundwater quality and its impact on human health: a case study from Chotanagpur plateau fringe region in India. Appl Water Sci 12, 25 (2022). https://doi.org/10.1007/s13201-021-01539-6
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DOI: https://doi.org/10.1007/s13201-021-01539-6