Which onsite septic system effluent components of wastewater are helpful or harmful to soils or nearby waterways?
POST a QUESTION or COMMENT about the effects of wastewater ingredients on soil and water in the environment
Effects of septic or sewage wastewater on soils:
This article includes a table describing the effects of common wastewater constituents on arid soil, tropical and temperate soil, and on both ocean water and fresh water bodies.
These effects of eleven principal septic tank efflent constituents on soil and water bodies vary widely from beneficial to very harmful and highly undesirable.
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Effects of Septic Effluent Components on Soil & Water in the Environment
The chart below, discussion, and nearly forty research reference citations address the effects on soil or land and water environments of the discharge of nitrogen, organic compounds, water discharged in onsite wastewater disposal systems such as common septic tanks, drainfields, seepage pits, drywells, and soakaway beds disposing of both graywater and blackwater or sewage effluent.
Biocompatibility Chart of the Effects of Septic / Wastewater Ingredients on Soil & Water
Wastewater Constituent
Effects on Soils
Effects on Water
Comments & References
Arid Land Soils
Wet, Temperate & Tropical Soils
Ocean Water
Fresh Water
Boron
in wastewater
Highly toxic to plants at typical wastewater concentrations
at sufficient concentrations chlorine may kill off or reduce the level of septic tank bacteria that are needed for effective wastewater processing. At normal home usage levels we do not expect to see an effect. Some septic systems require disinfection of wastewater before it is discharged to the environment.
2. Industrial toxins in ocean water:
Even though diluted, may bio-concentrate in various life forms, moving up food chain to humans
3. Organic compounds:
at a particulate level such as food waste, organic material in wastewater may add to septic tank volume and require more frequent pumping to avoid disposal field clogging where private septic systems are involved. Grease discharged into septic systems and sewers can cause clogging and failures.
4. Nitrogen impact on water:
Nitrogen is potentially harmful in ocean water by encouraging growth of algae, but dilution in ocean envrionment probably means there is no measurable effect
5. Pathogenic microorganism discharge in wastewater impact on wastewater, septic tanks, soils:
"harmlessly biodegrade" in soils is probably accurate in general but may not be in septic tanks and wastewater treatments connected to health care facilities. A corrolary problem is the high concentration of antibiotics in wastewater produced by health care facilities, nursing homes etc., - at levels that can damage or destroy essential bacteria in septic tanks and in the soils receiving wastewater.
6. Phosporous impact on ocean water:
Phosphorous is potentially harmful in ocean water by encouraging growth of algae, but dilution in ocean envrionment probably means there is no measurable effect
7. Salt impact on soils & waterways:
Burks & Minnis (1994) and others have researched the impact of salt on septic system failure.
8. Water impact on soils:
although water volume discharge may be beneficial in general, water discharge in a volume sufficient to flood a septic disposal field is highly undesirable as results include septic system failure, sewage backups even into the building, and the discharge of un-treated wastewater into the environment.
Original source: Adapted from "Table 6: Biocompatibility Chart", p. 38 of unidentified document - citation needed. Also see the research citations found atReferences or Citations
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"Biocompatibility Chart", "The chart below summarizes the biocompability of common wastewater constituents with the four most common disposal environments. Table 6: Biocompatibility chart[ - adapted and expanded by InspectApedia.com editor, with additional citations below [source unknown, under further research, apparently page 28 of a document, presentation or textbook]
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Abstract: The authors obtained 50 vegetable samples from various regions in Morocco and examined them to determine the micro biological quality of these products. Aerobic count, coliform, enterococci, and Staphylococcus areus were evaluated. This analysis revealed high levels of enterococci, fecal coliforms, and total coliforms. No coagulase-positive Staphylococcus aureas was detected in any of the samples analyzed. Biochemical identification of Enterobacteriaceae showed the presence of Citrobacter freundii (28 percent), Enterobacter cloacae (27 percent), Escherichia coli (16 percent), Enterobacter sakazakii (12 percent), Klebsiella pneamoniae (17 percent), Serratia liquefaciens (11 percent), and Salmonella arizonae (0.7 percent). The results clearly demonstrate that vegetables irrigated with untreated wastewater have a high level of microbiological contamination. Consequently, these vegetables may be a threat for the Moroccan consumer and may be considered a serious risk to Moroccan public health. ABSTRACT FROM AUTHOR Copyright of Journal of Environmental Health is the property of National Environmental Health Association and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. Contact Us to request a copy of this article stored as BacterialPathogens.pdf if you have difficulty obtaining a copy of this full article for private use.
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Treatment. $49.95, Hogarth House, Ltd., 800-993-2665 x327 or order by telephone 800 -993-2665 x327 (Univ. Wisc. Bookstore)
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In addition to citations & references found in this article, see the research citations given at the end of the related articles found at our suggested
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