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 |