City of Ann ArborThe city has long tested for Per- and polyfluoroalkyl substances (PFAS) in its water supply, both in the river and well sources and the finished drinking water. This dashboard shares all of our sampling data in both tabular and graph form.pfas-monitoringengAnn Arbor Data CatalogPublicEnvironmentInfrastructurePFAS MonitoringDatasetsMichigan--Ann ArborMichiganLast Modified: 2025-07-18