Erdoğan AYTEKİN, Mark ELLIOTT

8010

Household Wastewater Discharges Into The Rural Alabama & Impact on Watershed Water Quality

Household Wastewater Discharges Into The Rural Alabama & Impact on Watershed Water Quality

In rural areas, untreated wastewater discharged from homes (commonly called “straight pipes”) can cause harmful effects on the region’s rivers, streams and lead to negative impacts on water quality and potentially ecological and human health. Determining and addressing the water quality and health of these aquatic ecosystems requires identification of the source of contamination. Surface water quality in Hale County was evaluated at least once a month at twenty sites in wet and dry seasons. Samples were analyzed for physical (turbidity), chemical (pH, conductivity, chloride, sulfate, calcium, iron, magnesium, potassium, sodium, ammonium, ortho-phosphorus, nitrite, nitrate, dissolved organic carbon, optical indices), and microbiological (E. coli) water quality parameters. Excitation-emission matrixes (EEMs) Parallel Factor Analysis (PARAFAC) was used to identify and classify fluorescence emitting organic substances based on fluorescence peak location. Principal component analysis (PCA) was used to identify analyte signatures associated with sewage contamination. In order to detect straight pipe wastewater impacts on water quality, three main sites were sampled upstream, midstream and downstream of the town of Newbern, Alabama over the three months of the drought period (i.e., from September to November 28th, 2016). Over 20 water quality parameters were analyzed and compared with the WHO, EPA, and ADEM standards. The results showed that E. coli values highly exceed water quality standards, particularly after the drought when peak E. coli concentrations downstream exceeded 100,000 per 100 mL. This study is one of the first to document the adverse impacts of straight pipe discharges on water quality in the United States.
Keywords:

water quality water management, wastewater,

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Türkiye Su Bilimi ve Yönetimi Dergisi-Cover
  • ISSN: 2536-474X
  • Başlangıç: 2017
  • Yayıncı: Tarım ve Orman Bakanlığı Su Yönetimi Genel Müdürlüğü
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