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New Mexico weighs options for reusing oil and gas wastewater

With drought a constant consideration for New Mexico, state and federal officials are warning that decisions about water are growing more complicated and opportunities to tap untraditional sources should be considered.

The state, with the help of the U.S. Environmental Protection Agency, has drafted a document that outlines areas where regulations can be streamlined to encourage the treatment and reuse of wastewater that comes from oil and natural gas operations.

The white paper released late last week says oil and gas production in New Mexico generated nearly 38 billion gallons (143 billion liters) of wastewater in 2017. As the boom in oil production continues in the Permian Basin’s well fields along the Texas-New Mexico border, officials say so will the amount of wastewater.

State energy secretary Ken McQueen said New Mexico in 2018 became the third largest oil-producing state in the U.S. and along with that has come more wastewater – known in the industry as produced water.

“Our effort to clarify the state and federal regulatory landscape dealing with produced water will facilitate greater produced water reuse and recycling and in turn help relieve the growing demand on the state’s water resources,” McQueen said in a statement.

Aside from highlighting the uptick in oil and gas development in recent years, the document outlines the arid state’s challenges with drought.

Receiving an average of just under 15 inches of rainfall a year, New Mexico is already the fifth driest state in the nation, according to the National Oceanic and Atmospheric Administration. That aridness was exacerbated this year as runoff along the Rio Grande and Pecos rivers marked some of the lowest levels in decades. Water managers were forced to broker deals to keep the Rio Grande flowing through the state’s most populous city.

“While conservation plays an important role in managing the state’s limited water resources, it is not enough,” the authors of the white paper wrote.

In New Mexico and other parts of the West, some stakeholders are asking whether production water from the oil and gas industry should continue to be treated as wastewater.

The water usually contains chemicals, metals and other dissolved solids. Most of it is disposed of by injecting it deep underground, where it can no longer be accessed or used. In some cases, it can be reused in the oilfield for other drilling processes.

For every barrel of oil, it’s estimated four or five barrels of produced water are generated.

The state and the EPA are looking at what steps would be needed to treat and renew it for other purposes, acknowledging that there are still health and environmental questions that need to be answered if the water were to be used for other purposes outside the industry.

State and federal officials began working on the white paper in July in hopes of clarifying existing regulatory and permitting rules related to the way produced water can be reused and recycled.

The state is accepting comments on the document so it can be finalized before the end of the year.

(Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)

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