The PWTA test result information that is submitted to the NJDEP provides not only the NJDEP, but county and local health agencies, and other groups with an understanding of groundwater quality throughout New Jersey since the sample results submitted are of untreated water. For example, the Monmouth County Health Department has used PWTA data for tracking volatile organic compound (VOC) plumes in groundwater in Monmouth County, and the United States Geological Survey (USGS) is planning to use PWTA data to study nitrate contamination in the Highlands region of New Jersey.
Some results have confirmed expectations about ground water quality; in those counties requiring arsenic testing, the results have shown that arsenic is detected in the Piedmont region of New Jersey at a greater frequency than other areas of the State that are required to test for arsenic. Other results are leading us to a better understanding of ground water quality; the fecal coliform results have shown that the wells in the bedrock aquifers of New Jersey are more likely to have fecal coliform contamination than wells in the Coastal Plain. These analyses can be used by the NJDEP to further refine the PWTA analytical requirements throughout the State so that those wells located in specific geological formations are testing for the appropriate parameters.