PFAS Sampling and Data Analysis in National Parks Across the United States

In response to requirements of the Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), the U.S. Department of the Interior tasked the National Park Service with sampling all NPS potable water sources regulated by the Safe Drinking Water Act for 29 per- and polyfluoroalkyl substances (PFAS). To accomplish this task, NPS needed to coordinate sampling at almost 1,000 locations across 182 parks, develop a new database to organize and analyze the data, and communicate results to parks, NPS regional points of contact, and NPS leadership. NPS selected ERG to support this effort.

ERG provided a wide range of support to help NPS respond to DOI’s sampling request. We began by inventorying all NPS water systems to create a master dataset of parks impacted by the DOI requirement. We also developed training resources for NPS staff to ensure consistent and proper sample collection. Next, we coordinated sampling across 1,000 locations at 182 parks, including in remote areas such as Alaska, Hawaii, and the Virgin Islands. We also worked with the laboratory to establish a sampling schedule designed to minimize project delays. To enable efficient processing and analysis of the sampling data, we developed a brand-new database capable of processing laboratory results and comparing data against evolving federal and state thresholds. To help NPS communicate results, we created a dashboard designed to quickly summarize sampling results for NPS leadership. We also worked with NPS leadership to develop a robust Communications and Corrective Action Plan to assist NPS Regional POCs as they respond to concerns about the sampling results in their regions.