Pennsylvania

How to read these graphs:

The graphs on the left show the rate of growth compared to the earliest year for which we have data -- in most cases 2003. The gray lines represent a theoretical constant annual rate of change.

The bar charts on the right show the actual values for each year we have data. For example, in 2008, Pennsylvania had 4,074 new wells drilled.

State Data

35 enforcement staff for 74,774 wells in 2008

Wells Drilled: Change Since 2003

Wells Drilled

2003	2004	2005	2006	2007	2008	2009
2,353 2353.0	2,757 2757.0	3,631 3631.0	4,134 4134.0	4,078 4078.0	4,074 4074.0	2,247 2247.0

Enforcement Actions: Change Since 2003

Enforcement Actions

2003	2004	2005	2006	2007	2008	2009
393 393.0	544 544.0	417 417.0	374 374.0	470 470.0	599 599.0	628 628.0

Enforcement Staff: Change Since 2003

Enforcement Staff

2003	2004	2005	2006	2007	2008	2009
35 35.0	35 35.0	35 35.0	35 35.0	35 35.0	35 35.0	76 76.0

Total Wells: Change Since 2003

Total Wells

2003	2004	2005	2006	2007	2008	2009
52,851 52851.0	58,728 58728.0	60,204 60204.0	69,367 69367.0	68,940 68940.0	74,774 74774.0	77,310 77310.0