Knowledge Resource Center for Ecological Environment in Arid Area
| Analysis of Oregon's Domestic Well Testing Act data for use in a sentinel surveillance system for private well contaminants | |
| Hoppe;Brenda O. | |
| 出版年 | 2012 |
| 英文摘要 | The Safe Drinking Water Act ensures that public systems provide water that meets health standards. However, no such protection exists for millions of Americans who obtain water from private wells. Concern for safety is warranted as most wells draw from underground aquifers, and studies demonstrate that groundwater is affected by a range of contaminants, most often nitrate. Oregon's Domestic Well Testing Act (DWTA) links well testing to property sales, enabling continuous data collection by the State. This research addresses a need for identifying datasets for characterizing exposure to private well contaminants by evaluating DWTA data for use in a sentinel surveillance system. Validation of DWTA data was accomplished by developing a land use regression (LUR) model based on agricultural nitrogen inputs and soil leachability to predict nitrate concentrations in well water. Geographic information systems (GIS) were used to advance methods for high resolution spatial modeling of fertilizer and manure nitrogen with statewide coverage. Hazard mapping with these datasets suggests that nearly half of recently drilled wells are susceptible to nitrate contamination. Spearman's rank correlation demonstrated a significant correlation between LUR-predicted nitrate levels and levels reported in the DWTA dataset. These results suggest that DWTA data is valid for use in a sentinel surveillance system, such that evidence of nitrate contamination in a single well may indicate an area-wide health hazard. However, a low fraction of variance explained by the LUR model highlighted the need for specific improvements to datasets crucial for understanding nitrate contamination in well water, including the DWTA. Graduation date: 2012 |
| 英文关键词 | Private wells Domestic wells Nitrate Drinking water Groundwater contamination Public health surveillance Well water -- Oregon -- Testing Well water -- Quality -- Oregon Groundwater -- Pollution -- Oregon Nitrates -- Oregon Agricultural pollution -- Oregon Drinking water -- Oregon -- Testing Drinking water -- Quality -- Oregon |
| 语种 | 英语 |
| URL | http://hdl.handle.net/1957/29310 |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/247031 |
| 推荐引用方式 GB/T 7714 | Hoppe;Brenda O.. Analysis of Oregon's Domestic Well Testing Act data for use in a sentinel surveillance system for private well contaminants[D],2012. |
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