MONTANA: The pH average for precipitation in Glacier National Park was 4.9.
IDAHO: The 1980-81 pH average at Craters of the Moon National Monument was 4.8. All these Rocky Mountain averages are for wet deposition only.
NEW MEXICO: Acid precipitation with a pH often in the 4s and occasionally in the 3s has been reported for the Teseque Watersheds in the Santa Fe National Forest.
ARIZONA: The 1980 pH average for Tombstone was 5.2.
WASHINGTON: Twenty-four of 68 lakes sampled in the Olympic Mountains and the Cascades by Drs. Eugene B. Welch and William H. Chamberlain, of the University of Washington, had a pH of less than 6. Seven lakes had a pH of less than 5.5; they all were located in the Alpine Lakes Wilderness, due east of Seattle. In a report submitted to the National Park Service, Welch and Chamberlain noted that 70% of the rainfall monitored in Seattle ranged in pH from 5.2 to 4.2.
CALIFORNIA: Dr. Doug Lawson, a researcher for the state Air Resources Board, says, "The state has levels of acid precipitation as high as or higher than any place in the country, and we do have areas that are very susceptible in the Sierra Nevada and around Los Angeles where there are exposed granitic surfaces." The pH of drizzle measured by Dr. James Morgan of Cal Tech in 1978 was 2.9. Recently, when scientists flew through smog over Los Angeles, they were unable to conduct tests because acids had corroded their instruments.