Three Lower Yakima Valley dairies have made progress in controlling sources of nitrogen to a drinking water aquifer in the three years since reaching a legal agreement with the U.S. Environmental Protection Agency, the EPA says. The dairies have made “important progress” and “will continue this work as required by the consent order,” said Lucy Edmondson, director of EPA’s Washington state office. The Cow Palace, owned by the Dolsen family, George DeRuyter & Son Dairy, and Henry Bosma Dairy and Liberty Dairy, both owned by the Bosma family, have improved field manure application and irrigation practices, the EPA said in a public update.