We are a leading provider of total water solutions to the U.S. unconventional oil and gas industry. Within the major shale plays in the U.S., we believe we are a market leader in sourcing and transfer of water prior to its use in drilling and completion activities associated with fracking, which we refer to as "pre-frac water services." In most of our areas of operations, we provide complementary water-related services that support oil and gas well completion and production activities including containment, monitoring, treatment, flowback, hauling and disposal. Water and related services are increasingly important as oil and gas E&P companies have increased the complexity and completion intensity of horizontal wells (including the use of longer horizontal wellbore laterals, tighter spacing of frac stages in the laterals and increased water and proppant use per foot of lateral) in order to improve production and recovery of hydrocarbons. Historically, we have generated a substantial majority of our revenues through providing total water solutions to our customers. We provide our services to major integrated and large E&P companies, who typically represent the largest producers in each of our areas of operations.