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Environmental Science and Pollution Research

, Volume 26, Issue 3, pp 2132–2144 | Cite as

Contamination of estuaries from failing septic tank systems: difficulties in scaling up from monitored individual systems to cumulative impact

  • Phillip GearyEmail author
  • Steven Lucas
Groundwater under threat from diffuse contaminants: improving on-site sanitation, agriculture and water supply practices

Abstract

Aquaculture in many coastal estuaries is threatened by diffuse sources of runoff from different land use activities. The poor performance of septic tank systems (STS), as well as runoff from agriculture, may contribute to the movement of contaminants through ground and surface waters to estuaries resulting in oyster contamination, and following their consumption, impacts to human health. In monitoring individual STS in sensitive locations, it is possible to show that nutrients and faecal contaminants are transported through the subsurface in sandy soils off-site with little attenuation. At the catchment scale however, there are always difficulties in discerning direct linkages between failing STS and water contamination due to processes such as effluent dilution, adsorption, precipitation and vegetative uptake. There is often substantial complexity in detecting and tracing effluent pathways from diffuse sources to water bodies in field studies. While source tracking as well as monitoring using tracers may assist in identifying potential pathways from STS to surface waters and estuaries, there are difficulties in scaling up from monitored individual systems to identify their contribution to the cumulative impact which may be apparent at the catchment scale. The processes which may be obvious through monitoring and dominate at the individual scale may be masked and not readily discernible at the catchment scale due to impacts from other land use activities.

Keywords

Septic tank systems Contamination Wastewater management Aquaculture Groundwater Water pollution Catchment 

Notes

Acknowledgements

The assistance of the NSW Department of Local Government, The University of Newcastle, Port Stephens Council and residents in Salt Ash, NSW in this project work is gratefully acknowledged. Thanks also to Olivier Rey-Lescure who drafted Figs. 2, 3 and 4.

References

  1. Australian/New Zealand Standard 1547 (2012) On-site domestic wastewater management. SAI Global, SydneyGoogle Scholar
  2. Beal CD, Gardner EA, Menzies NW (2005) Process, performance and pollution potential: a review of septic tank-soil absorption systems. Aust J Soil Res 43(7):781–802.  https://doi.org/10.1071/SR05018 CrossRefGoogle Scholar
  3. Bierkens MFP, Finke PA, De Willigen P (2000) Upscaling and downscaling methods for environmental research. Kluwer Academic Publishers, DordrechtGoogle Scholar
  4. Gardner EA, Vieritz A, Beal CD (2006) Are on-site systems environmentally sustainable? Water 33(1):38–41Google Scholar
  5. Geary PM (2005) Effluent tracing and the transport of contaminants from a domestic septic system. Water Sci Technol 51(10):283–290CrossRefGoogle Scholar
  6. Geary PM, Davies CM (2003) Bacterial source tracking and shellfish contamination in a coastal catchment. Water Sci Technol 47(7–8):95–100CrossRefGoogle Scholar
  7. Geary PM, Evans CA, Maswabi MT, Lee C, Zammit A, Webster G, Hunter M (2015) Monitoring and tracking contaminant sources in catchments and estuaries. Water Pract Technol 10(3):601–608.  https://doi.org/10.2166/wpt.2015.070 CrossRefGoogle Scholar
  8. Gerritse RG, Adeney JA, Dimmock GM, Oliver YM (1995a) Retention of nitrate and phosphate in soils of the Darling Plateau in Western Australia: implications for domestic septic tank systems. Aust J Soil Res 33(2):353–367.  https://doi.org/10.1071/SR9950353 CrossRefGoogle Scholar
  9. Gerritse RG, Adeney JA, Hosking J (1995b) Nitrogen losses from a domestic septic tank system on the Darling Plateau in Western Australia. Water Res 29(9):2055–2058.  https://doi.org/10.1016/0043-1354(95)00023-E CrossRefGoogle Scholar
  10. Kardamanidis K, Corbett SJ, Zammitt AP (2009) Hepatitis A: Wallis Lake revisited. NSW Public Health Bull 20(1–2):29–30.  https://doi.org/10.1071/NB08057 CrossRefGoogle Scholar
  11. Kresjl J, Harrison R, Henry C, Turner N, Tone D (1994) Comparison of lysimeter types in collecting microbial constituents from sewage effluent. Soil Sci Soc Am J 58:131–133CrossRefGoogle Scholar
  12. Leeming R, Ball A, Ashbolt NJ, Nichols PD (1996) Using faecal sterols from humans and animals to distinguish faecal pollution in receiving waters. Water Res 30(12):2893–2900.  https://doi.org/10.1016/S0043-1354(96)00011-5 CrossRefGoogle Scholar
  13. Lucas SA, Geary PM, Coombes PJ, Dunstan RH (2007) Evaluation of nutrient/microbial contributions from an unsewered area to the Tilligerry Creek Estuary. Unpublished Final Report to Port Stephens Council, June 2007Google Scholar
  14. Meeroff DE, Morin FJ, Bloetscher F (2007) Coastal pollutant loading from on-site treatment & disposal systems. Florida Water Res J 42–53. Presented as a technical paper at the Florida Water Resources Conference in April 2006Google Scholar
  15. Meeroff DE, Bloetscher F, Long S, Bocca T (2014) The use of multiple tracers to evaluate the impact of sewered and non-sewered development on the coastal water quality in a rural area of Florida. Water Environ Res 86(5):445–456.  https://doi.org/10.2175/106143013X13807328848135 CrossRefGoogle Scholar
  16. Morrissey PJ, Johnston PM, Gill LW (2015) The impact of on-site wastewater from high density cluster developments on groundwater quality. J Contam Hyd 182:36–50.  https://doi.org/10.1016/j.jconhyd.2015.07.008 CrossRefGoogle Scholar
  17. Nasri B, Fouché O, Ramier D (2015) Monitoring infiltration under a real on-site treatment system of domestic wastewater and evaluation of soil transfer function (Paris Basin, France). Environ Earth Sci 73:7435–7444CrossRefGoogle Scholar
  18. Pang L, Close M, Goltz M, Sinton L, Davies H, Hall C, Stanton G (2003) Estimation of septic tank setback distances based on transport of E. coli and F-RNA phages. Environ Int 29:907–921CrossRefGoogle Scholar
  19. Robertson JB, Edberg SC (1997) Natural protection of spring and well drinking water against surface microbial contamination. I Hydrogeological parameters. Crit Rev Microbiol 23(2):143–178.  https://doi.org/10.3109/10408419709115134 CrossRefGoogle Scholar
  20. Robertson WD, Schiff SL (2008) Persistent elevated nitrate in a riparian zone aquifer. J Environ Qual 37(2):669–679.  https://doi.org/10.2134/jeq2007.0102 CrossRefGoogle Scholar
  21. Robertson WD, Cherry JA, Sudicky EA (1991) Ground-water contamination from two small septic systems on sand aquifers. Ground Wat 29(1):82–92.  https://doi.org/10.1111/j.1745-6584.1991.tb00500.x CrossRefGoogle Scholar
  22. Schneeberger CL, O’Driscoll M, Humphrey C, Henry K, Deal N, Seiber K, Hill VR, Zarate-Bermudez M (2015) Fate and transport of enteric microbes from septic systems in a coastal watershed. J Environ Health 77(9):22–30Google Scholar
  23. Sowah R, Zhang H, Radcliffe D, Bauske E, Habteselassie MY (2014) Evaluating the influence of septic systems and watershed characteristics on stream faecal pollution in suburban watersheds in Georgia, USA. J App Micro 117(5):1500–1512.  https://doi.org/10.1111/jam.12614 CrossRefGoogle Scholar
  24. Valiela I, Collins G, Kremer J, Lajtha K, Geist M, Seely B, Brawley J, Sham CH (1997) Nitrogen loading from coastal watersheds to receiving estuaries: new method and application. Ecol Appl 7(2):358–380.Google Scholar
  25. Whitehead JH, Geary PM (2000) Geotechnical aspects of domestic on-site effluent management systems. Aust J Earth Sci 47(1):75–82.  https://doi.org/10.1046/j.1440-0952.2000.00769.x CrossRefGoogle Scholar
  26. Withers PJA, Jordan P, May L, Jarvie HP, Deal NE (2014) Do septic systems pose a hidden threat to water quality? Front Ecol Environ 12(2):123–130.  https://doi.org/10.1890/130131 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Environmental and Life SciencesUniversity of NewcastleCallaghanAustralia
  2. 2.The Tom Farrell Institute for the EnvironmentUniversity of NewcastleCallaghanAustralia

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