 As of 1984 , the mean annual precipitation for the Loyalsock Creek watershed ( which Plunketts Creek is part of ) was 42 to 48 inches ( 1067 to 1219 mm ) . Pennsylvania receives the greatest amount of acid rain of any state in the United States . Because Plunketts Creek is in a sandstone and shale mountain region , it has a relatively low capacity to neutralize added acid . This makes it especially vulnerable to increased acidification from acid rain , which poses a threat to the long term health of the plants and animals in the creek . The total alkalinity ( TA ) is a measure of the capacity of water to neutralize acid , with a larger TA corresponding to a greater capacity . In 2007 , the TA of two subtributaries was known : Engle Run , a 4 @.@ 9 @-@ mile ( 7 @.@ 9 km ) tributary of King Run , had a TA of 5 , and the Noon Branch , a 1 @.@ 9 @-@ mile ( 3 @.@ 1 km ) tributary of Wolf Run , had a TA of 9 . 
 As of 1984 , the mean annual precipitation for the Loyalsock Creek watershed ( which Plunketts Creek <a href='drop_aux' title='1'><mark>is</mark></a>part of ) was 42 to 48 inches ( 1067 to 1219 mm ) . Pennsylvania <a href='uninflect' title='2'><mark>receives</mark></a> the greatest amount of acid rain of any state in the United States . Because Plunketts Creek is in a sandstone and shale mountain region , it <a href='got' title='3'><mark>has</mark></a> a relatively low capacity to neutralize added acid . This <a href='uninflect' title='4'><mark>makes</mark></a> it especially vulnerable to increased acidification from acid rain , which <a href='uninflect' title='5'><mark>poses</mark></a> a threat to the long term health of the plants and animals in the creek . The total alkalinity ( TA ) <a href='drop_aux' title='6'><mark>is</mark></a>a measure of the capacity of water to neutralize acid , with a larger TA corresponding to a greater capacity . In 2007 , the TA of two subtributaries was known : Engle Run , a 4 @.@ 9 @-@ mile ( 7 @.@ 9 km ) tributary of King Run , had a TA of 5 , and the Noon Branch , a 1 @.@ 9 @-@ mile ( 3 @.@ 1 km ) tributary of Wolf Run , had a TA of 9 . 
As of 1984 , da mean annual precipitation for the Loyalsock Creek watershed ( which Plunketts Creek part of ) was 42 to 48 inches ( 1067 to 1219 mm ) . Pennsylvania receive tdagreatest amount of acid rain of any state in the United States . Because Plunketts Creek is in a sandstone and shale mountain region , it got a relatively low capacity to neutralize added acid . This make it especially vulnerable to increased acidification from acid rain , which pose a threat to thdaong term health of the plants and animals in the creek . Thedatal alkalinity ( TA ) a measure of the capacity of water to neutralize acid , wid a larger TA corresponding to a greater capacity . In 2007 , the TA of 2 subtributaries was known : Engle Run , a 4 @.@ 9 @-@ mile ( 7 @.@ 9 km ) tributary of King Run , had a TA of 5 , and the Noon Branch , a 1 @.@ 9 @-@ mile ( 3 @.@ 1 km ) tributary of Wolf Run , had a TA of 9 .