Comparison of percent of sites showing changes in pH and alkalinity, 2011-2014 
2011 All sites Ponds Streams
  pH ANC pH ANC pH ANC
Increased 28% 19% 22% 17% 35% 22%
Decreased 2% 1% 1% 0% 3% 3%
No Change 70% 79% 76% 83% 62% 75%
2012 All sites Ponds Streams
  pH ANC pH ANC pH ANC
Increased 29% 21% 28% 33% 34% 23%
Decreased 2% 2% 1% 0% 4% 3%
No Change 69% 78% 71% 67% 62% 75%
2013 All sites Ponds Streams
  pH ANC pH ANC pH ANC
Increased 35% 23% 38% 33% 32% 13%
Decreased 0% 2% 0% 0% 0% 4%
No Change 65% 75% 62% 67% 68% 82%
2014 All sites Ponds Streams
  pH ANC pH ANC pH ANC
Increased 34% 35% 30% 39% 37% 31%
Decreased 3% 1% 0% 0% 6% 1%
No Change 63% 64% 70% 61% 57% 58%
SOURCE: ACID RAIN MONITORING PROJECT ANNUAL REPORT