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Management of risk factors for breaking localised pathways of microbial contamination in tubewells with handpump: a case study from India

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Abstract

Microbial contamination of handpump (HP) is common in developing countries like India. The WHO recommends sanitary inspection (SI) to assess the risk of water source contamination. In SI, all risks are given equal weightage. However, different mathematical models have shown that risks associated with localised pathways have a relatively higher influence on microbial contamination. This study aims to assess the efficacy of eliminating four risks associated with localised pathways and have shown a higher positive association with microbial contamination of HP than others in bivariate frequency analysis and four binary logistic regressions applied on 324 HPs randomly selected from nine districts of Uttar Pradesh, India. Analysis showed the four risks: (i) HP loose at base: (ii) apron cracked: (iii) apron < 1 m an: (iv) drainage broken have a higher positive association than others. In this study, the above four risks were eliminated from 154 HPs (safe 48 and unsafe 106) through standard civil structures keeping other risks untouched. Post-intervention thermotolerant coliforms (TTC) tests were carried out and unsafe HPs were reduced from 106 to 3. Therefore, managing the four risks associated with localised pathways is highly effective in preventing microbial contamination of HP water.

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Acknowledgements

The authors acknowledge the support of UP Jal Nigam, Government of Uttar Pradesh, Panchayati Raj Department, Government of Uttar Pradesh, MNNIT, Allahabad and NIH, Roorkee for facilitation water quality and sanitary survey and risk management.

Funding

The work has been part of the Ph.D. Program for the first author, and has not been funded by any external funding agency.

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NPS: conceptualised the study, methodology, fieldwork, supervision, coordination, resource mobilisation, data analysis, data curation, writing original draft. MK: idea and conceptualisation, methodology refinement, writing—review and editing, technical supervision. NS: coordination, field support, literature review. VM: methodology, compilation of results, and statistical analysis. MK: mathematical analysis, review, and editing.

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Correspondence to Mukul Kulshrestha.

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The community and individuals involved in the collection of primary data were informed (in local language) about this study and their consent was sought and obtained from each respondent before data collection commenced. Confidentiality was assured by not using names and keeping respondents anonymous wherever necessary.

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Singh, N.P., Kulshrestha, M., Shukla, N. et al. Management of risk factors for breaking localised pathways of microbial contamination in tubewells with handpump: a case study from India. Model. Earth Syst. Environ. 8, 2513–2523 (2022). https://doi.org/10.1007/s40808-021-01242-0

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