• The Texas White House

    Lyndon B Johnson

    National Historical Park Texas

Water Quality

A park ranger conducts tests of the Pedernales River

A park ranger conducting water testing on the Pedernales River

Lyndon B. Johnson National Historical Park has been engaged in water quality monitoring at two sites on the Pedernales River since 1996. The monitoring was initiated in response to park concerns related to nutrient and bacterial contamination from livestock grazing on lands upstream from the ranch. The monitoring is conducted by park staff as part of the Colorado River Watch Network, which is sponsored by the Lower Colorado River Authority (LCRA). Water quality measurements are taken once a month for the following parameters: water temperature, pH, dissolved oxygen, total dissolved solids, nitrate nitrogen, phosphates, and fecal coliform bacteria.

Other water quality monitoring efforts in the park have addressed potential effects on drinking water wells from pesticide treatment of the nearby pecan grove.

Did You Know?

Pres Johnson confers with Gen. William Westmoreland, May 30, 1968

President Johnson flew home to his Texas ranch 74 times during his 5 years in office, living and working for 490 days—or about one-fourth of his presidency—at the Texas White House. Here he confers with Gen. William Westmoreland on May 30, 1968. Lyndon B. Johnson National Historical Park