Purged (1)
A Frontier Investigation

Purged: Oklahoma’s Toxic Wastewater

Oilfield wastewater, polluted wells and the people living with the consequences in Oklahoma.

A cross Oklahoma, oilfield wastewater has continued to surface from the ground — even as regulators failed to contain it. This investigation examines how oversight fell short, how contamination spread and how families were left to navigate the consequences.

What Our Reporting Found

  • Toxic purges
    The state has tracked over 150 incidents of wastewater injected by oil and gas companies pouring from the ground and blasting out of old wells across Oklahoma.
  • Few consequences
    State regulators have repeatedly declined to penalize oil and gas companies for the purges. An agency spokesperson told The Frontier that they prefer to “lead with a handshake instead of a hammer.
  • Tainted water
    Families that rely on private wells have reported salty, oily drinking water. Water samples show salt levels that make water undrinkable, toxic metals and chemicals that can cause cancer.

The Investigation

These stories and conversations document how oilfield wastewater surfaced across Oklahoma, how regulators responded and what the contamination has meant for the people who rely on the state’s groundwater.

How We Reported This

This investigation is built on public records requests, regulatory filings, environmental data and on-the-ground reporting in communities affected by oilfield activity. Our reporters reviewed agency correspondence, inspection records and enforcement documents to understand what regulators knew, what they did — and what they failed to do.

We interviewed residents who rely on private wells, along with state officials and others involved in oversight, to trace how contamination concerns emerged and why some questions about groundwater impacts remain unanswered.

As the series continues, we’ll keep publishing new reporting and conversations — and documenting the public response.

Impact & Response

Reporting from this investigation has already prompted legislative action and renewed scrutiny of Oklahoma’s oversight of oilfield wastewater.

  • New bills seek to rein in oil companies’ pollution of Oklahoma groundwater

    Lawmakers introduced legislation aimed at tightening oversight of oilfield wastewater and protecting groundwater after Frontier reporting documented persistent purges and contamination concerns.

    The legislation comes after The Frontier found over 150 incidents where oilfield wastewater had gushed from the earth, releasing toxic chemicals — including some that cause cancer — near homes and farms and into drinking water sources.

Support This Investigation

Investigations like Purged take months of reporting, public records requests and on-the-ground interviews. The Frontier is donor-supported and free to read. If this work matters to you, your support helps keep it going — and keeps it independent.

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