Letter Health Consultation: Evaluation of Chromium in Private Wells. West County Road 112. Midland, Midland County, Texas

摘要

Groundwater at the site is currently used for food preparation, bathing, and for commercial businesses purposes. At least one resident has used the water to fill a swimming pool. Most residents reportedly stopped drinking the well water when they noticed the change in color. Sampling data indicate that water from private wells have hexavalent chromium in excess of current drinking water standards. Residents can be exposed to contaminants that enter the home in potable water via multiple pathways. These include direct ingestion of the water, inhalation of the contaminant due to volatilization (when the contaminant enters the air), and absorption of the contaminant through the skin during bathing or swimming. Thus, we would consider these all to be past completed exposure pathways. Currently, filtration systems on the private drinking wells have reduced contaminant concentrations to levels below analytical detection limits.