YAKIMA, Wash. (AP) — The federal government has completed a second round of groundwater sampling in Eastern Washington’s lower Yakima Valley.
The goal of the sampling is to link high levels of nitrates in groundwater and private wells to potential sources of contamination.
EPA sampled over 330 residential drinking water wells in the first sampling effort. Those results helped officials identify locations for the next round of sampling, which included crop fields, dairies, 29 wells and wastewater treatment plants.
The agency sent more than 1,000 samples to laboratories for analysis. EPA said Monday the results are expected later this summer.
