Map of spills displays the location of unconventional oil and gas spills. Click on a spill for more information. Click on the map overlay icon in the upper right corner of the map to see all unconventional wells, shale plays and tight plays.
Annual Spill Rate shows the spill rate for each calendar year (red line) and the cumulative number of wells (black line).
Spill Rate by Life Year shows the rate of spills based on the age of the well. Younger wells — drilling, fracturing, and highest production — have more spills than more mature wells.
Annual Spill Rate
Spill Rate by Life Year
Boxplot of Spills presents the volume of reported spills based on plot selection. You can zoom in or out (select autoscale symbol in topright of the chart). Hover over a box plot to see volumes at selected quantiles. Points to the left are individual spills.
Boxplot of Spills
This chart shows which causes and pathways tend to result in smaller or larger spills. States with higher reporting thresholds for spills (Colorado and New Mexico) tend to have larger volumes than states with a smaller reporting threshold (North Dakota and Pennsylvania).
Spills by Pathway shows the percent of spills by pathway (hover over chart).
Pathway Details shows more details about spills with more frequent events having larger text. For example, select the "Tank" pathway shows valves to be the most common problem. "Unknown" may not show up because it is so common (text size is too large).
Causal Mechanism shows the cause behind a spill: equipment failure, human error, environmental conditions, and unknown.