Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Acid Rain in Washington vs Pennsylvania
Name: Collin
Status: Student
Grade: 4-5
Location: PA
Country: United States
Date: July 2006

Why is the pH in acid rain lower in Washington DC than it is in Lancaster, PA?


There is only a small difference in the pH of precipitation between Washington (4.6 on an annual basis) and Lancaster, PA (4.4 or 4.5 on an annual basis). The pH at Washington may be slightly higher because the weather is affected more by Atlantic Ocean air, which is sometimes cleaner than the air coming from the west and southwest over Lancaster.

David R. Cook
Climate Research Section
Environmental Science Division
Argonne National Laboratory

Click here to return to the Environmental and Earth Science Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory