data california.. _california_housing_dataset: California Housing dataset ----- **Data Set Characteristics:** :Number of Instances: 20640 :Number of Attributes: 8 numeric, predictive attributes andThe PFAS in Drinking Water Maps (PFAS Maps) are an interactive series of maps for exploring both the US EPA Unregulated Contaminant Monitoring Rule (UCMR) 3 (2013-2015) Data