Environmental Science
8 years ago

Acidification Threatens Water Quality in Tennessee Valley Watersheds.

Review of water quality data in acid-sensitive watersheds within the Tennessee Valley
D.L. Meinert, F. Miller, R. Ruane, H. Olem

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The report looked at water quality data in acid-sensitive areas of the Tennessee Valley. They studied pH and alkalinity levels in streams since the 1940s. Data from 19 sites showed decreasing pH and alkalinity over time. Historical data from the 1940s compared to the 1970s showed pH declines at over 70% of sites. Hydrogen ion concentrations increased by 100% at 30 sites. Water treatment plant data in certain watersheds showed no clear trends. Recent heavy rainfall may have influenced pH and alkalinity changes in surface streams.