Cited by 431Fecal contamination and water qualityWastewater Treatment and ReuseWater Quality and Pollution Assessment

Pit Latrines and Their Impacts on Groundwater Quality: A Systematic Review

Open access
Graham, Jay P., Polizzotto, Matthew L.·2013·Environmental Health Perspectives

Abstract

Background: Pit latrines are one of the most common human excreta disposal systems in low-income countries, and their use is on the rise as countries aim to meet the sanitation-related target of the Millennium Development Goals. There is concern, however, that discharges of chemical and microbial contaminants from pit latrines to groundwater may negatively affect human health. Objectives: Our goals were to a) calculate global pit latrine coverage, b) systematically review empirical studies of the impacts of pit latrines on groundwater quality, c) evaluate latrine siting standards, and d) identify knowledge gaps regarding the potential for and consequences of groundwater contamination by latrines. Methods: We used existing survey and population data to calculate global pit latrine coverage. We reviewed the scientific literature on the occurrence of contaminants originating from pit latrines and considered the factors affecting transport of these contaminants. Data were extracted from peer-reviewed articles, books, and reports identified using Web of ScienceSM, PubMed, Google, and document reference lists. Discussion: We estimated that approximately 1.77 billion people use pit latrines as their primary means of sanitation. Studies of pit latrines and groundwater are limited and have generally focused on only a few indicator contaminants. Although groundwater contamination is frequently observed downstream of latrines, contaminant transport distances, recommendations based on empirical studies, and siting guidelines are variable and not well aligned with one another. Conclusions: In order to improve environmental and human health, future research should examine a larger set of contextual variables, improve measurement approaches, and develop better criteria for siting pit latrines.

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  • Some field studies suggest that pit latrines may be less likely to contaminate underlying groundwater when they are lined, particularly in rainy conditions.

    “Some field studies suggest that pit latrines, which are the most typical type of sanitation infrastructure in urban informal settlements, may be less likely to contaminate underlying groundwater when they are lined, particularly in rainy conditions 105 .”

    From Urban informal settlements as hotspots of antimicrobial resistance and the need to curb environmental transmission. (2020) · cites this paper as [105]

    The Results (page not provided) report less fecal-coliform contamination beside peat-lined pits than unlined pits, and the Discussion says liners can minimize seepage to groundwater. The paper does not show that lining is particularly protective in rainy conditions; its seasonal findings concern contamination without a lined-versus-unlined comparison. (LLM, conf=0.87)

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  • An estimated 1.77 billion people worldwide use some form of pit latrine as their primary means of excreta disposal.

    “Of the 2.7 billion people using on-site sanitation worldwide [6], an estimated 1.77 billion use some form of pit latrine as their primary means of excreta disposal [12].”

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Research works printed but not linked: 2

  1. Padmasiri JP, Jayatilake GM, Kotuwegedara JPK 1992 Groundwater pollution from double pit latrines. In: Water, Environment and Management: Proceedings of the 18th WEDC Conference, 30 August–3 September 1992, Kathmandu, Nepal. 239–241 Loughborough, UK Water, Engineering and Development Centre, Loughborough University of Technology
  2. Still DA, Nash SR 2002 Groundwater contamination due to pit latrines located in a sandy aquifer: a case study from Maputaland. In: Water Institute of Southern Africa Biennial Conference. Durban, South Africa:Water Institute of Southern Africa, 1–6. Available: http://www.sswm.info/sites/default/files/reference_attachments/STILL%20and%20NASH%202002%20Groundwater%20contamination%20due%20to%20pit%20latrines%20located%20in%20a%20sandy%20aquifer.pdf [accessed 29 March 2013]

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Authors
Graham, J. P., & Polizzotto, M. L.
Affiliations
  • George Washington University (US)
  • North Carolina State University (US)
Corresponding author
Graham, Jay P.
Venue
Environmental Health Perspectives
Published
2013-03-22
Volume
121
Issue
5
Pages
521-530
ISSN
  • 0091-6765 (ISSN-L)
  • 1552-9924
OpenAlex
W2084155931
Cited by
431
References
71
Citations by year
2026: 41 · 2025: 20 · 2024: 36 · 2023: 44 · 2022: 37 · 2021: 49 · 2020: 42 · 2019: 34 · 2018: 35 · 2017: 44 · 2016: 20 · 2015: 15 · 2014: 11 · 2013: 3
FWCI
1.60
Type
journal article
Language
en
Open access
Locations
  • Environmental Health Perspectives (publishedVersion, public-domain)
  • Europe PMC (PubMed Central) (publishedVersion, public-domain)
  • PubMed Central (publishedVersion, public-domain)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion, public-domain)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Fecal contamination and water quality
  • Physical Sciences › Environmental Science › Waste Management and Disposal › Wastewater Treatment and Reuse
  • Physical Sciences › Environmental Science › Water Science and Technology › Water Quality and Pollution Assessment
Keywords
pit latrines, groundwater contamination, sanitation, microbial contaminants, chemical contaminants, contaminant transport, latrine coverage, low-income countries
MeSH terms
Ammonia, Chlorides, Humans, Nitrates, Sanitation, Toilet Facilities, Water Microbiology, Water Pollutants, Chemical, Water Pollution, Groundwater

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