The Impact Of Mexico's Worst Mining Disaster, 5 Years Later

By Kendal Blust
Published: Monday, August 5, 2019 - 7:18am
Updated: Monday, August 5, 2019 - 7:48am

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Martha Velarde
Kendal Blust/KJZZ
Martha Velarde stands on a hill overlooking the Rio Sonora valley near her home in Baviácora on July 30, 2019.

Willows and cottonwoods sway on the banks of the Rio Sonora as it flows through the little Sonoran pueblo Baviácora. Nearby, cows graze lazily in lush green pastures on the westernmost edge of Sonora’s Sierra Madre mountain range.

Even in the sticky summer heat, it’s an idyllic scene.

But local Martha Velarde said nothing has been the same in this quiet river valley since Aug. 6, 2014, when Mexico’s largest mining company spilled nearly 11 million gallons of copper sulfate acid solution carrying heavy metals into the Bacanuchi and Sonora rivers.

“The water was running orange, red, a coppery color through the entire Rio Sonora,” Velarde remembered.

Neighbors started getting sick. Animals were dying. And at first, nobody knew why.

It took more than 24 hours for Grupo México’s Buenavista copper mine to notify authorities about the spill and stop the leak. Then several more days for environmental officials to close wells carrying contaminated water into people's homes.

“Which meant that everyone, absolutely everyone living here, was in direct contact with contaminated water,” Velarde said.

Unaware of spill, some people waded through the river. Many others used contaminated tap water for bathing, cooking and drinking.

Contamination map Rio Sonora
PODER
Map of the affected areas along the Rio Sonora.

The spill at the Buenavista mine in Cananea is thought to have affected more than 22,000 people living in seven riverside towns downstream of the mine.

“And it caused problems not only to our physical health, but emotionally as well,” Velarde said, tearing up as she recalled the last five years.

The spill caused health problems, economic struggles and environmental damage in the community.

Velarde and her husband had to send their grandchildren away after blood tests showed the children had high levels of heavy metals like lead and aluminum in their bodies.

“So many people had to leave, for their health or to find work, when we lived here so comfortably before,” she said. “That’s what we want: the life we had before the company took it away with it’s great irresponsibility.”

But in the five years since the spill, rancher Jesús López said in many ways things have gotten worse.

“Everything fell apart with the spill,” he said.

The fields, flooded by heavy rains just a month after the spill, are less productive than they used to be.

López said he didn’t sow peanut crops this year because he can’t make a profit anymore.

Other families struggle to grow the beans, chilies, garlic and other staples they used to eat and sell. Local cheese makers say their cows don’t produce as much milk.

But the worst part, López said, is the fear.

“This is pure cancer. Everyone who has died here has died of cancer. There’s no illness more horrible than that,” he said. “And in reality, I am afraid.”

Like so many others, he worries about the long-term consequences of the contamination he and his family have been exposed to.

Government officials have reopened the wells and said tap water in the Rio Sonora valley is safe now. But most people are still buying bottled water for cooking and drinking. Some won’t even use tap water to bathe their children.

Beyond The Rio Sonora

That sense of distrust only grew last month when Grupo México spilled 3,000 liters of sulfuric acid from its installations at the Port of Guaymas, Sonora into the Sea of Cortez.

Protesters took to the streets demanding the government hold the mining company accountable for the damage it’s caused. And Mexico’s environmental regulator temporarily shut down the facilities responsible for the recent spill after finding it didn’t have proper environmental impact permits.

Buenavista mine spill
PODER
The Bacanuchi River, a tributary of the Rio Sonora, after nearly 11 million gallons of copper sulfate acid solution flowed into the water on Aug. 6, 2014.

“With the case in Guaymas, it’s interesting but it’s emblematic,” said Benjamin Cokelet, founder and co-director of Project on Organizing, Development, Education and Research (PODER), a nonprofit working to improve corporate transparency and accountability in Latin America.

PODER is helping the local Sonora River Basin Committees gain redress for the affects of the spill through through the legal system.

Cokelet said after the 2014 spill Mexican investigators found 55 irregularities at the Buenavista mine. In fact, the toxic spill was caused by a failure on pipe seal in a leachate pond in mining installations that were not yet finished and were not operating with necessary permits.

Grupo México was fined about $2 million after the spill. And the company, through Mexico’s environmental agency SEMARNAT set up a trust fund of about $100 million — under the current exchange rate — to alleviate harm to people and the environment.

But residents say they never saw many of the promised remediations.

“Basically nothing that the trust fund promised to do did it actually do,” said Cokelet. “So as you can imagine this is really insult to injury.”

A medical clinic was partially built and abandoned. Only two of 36 promised water purification plants are operating. And some say they received less than $20 compensation from the $100 million trust.

Jesús López
Kendal Blust/KJZZ
Rancher Jesús López with his dogs near the Rio Sonora on July 30, 2019.

Grupo México did not respond to KJZZ’s requests for comment.

Blanca Mendoza, Mexico’s environmental protection prosecutor, said the agency is currently looking into whether the government and the mining company lived up to their obligations after the spill.

“We’re working really hard on that analysis,” she said, adding that she’s aware of complaints that Grupo México didn’t live up to it’s promises.

In July, Mexican environmental officials said the mining company was being investigated for 22 cases of environmental damage.

Grupo México has also faced scrutiny for hazardous waste pollution in the United States. In 2009, it had to pay the U.S. government nearly $1.8 billion in clean-up costs to settle issues at more than 80 sites in 19 states contaminated by its Tucson-based subsidiary Asarco.

In the last five years, Cokelet said PODER and the Sonora River Basin Committees have filed 21 constitutional level lawsuits related to the toxic spill in the Rio Sonora, five of which are waiting to be heard by Mexico’s Supreme Court. One case, is expected to be heard on Aug. 7, the day after the fifth anniversary of the spill.

And last September, the Supreme Court ruled in favor of residents opposed the mine’s tailings pond. Cokelete said the ruling affirms the community’s right to be informed about and participate in the permitting process, and sets an important legal precedent.

Staying In The River Valley

Cradling her 1-year-old son, Francisca Garcia talked about the ways life has changed in her home town of Aconchi since the spill in the Rio Sonora.

“You can’t live the way you used to,” she said. “It used to be that everything revolved around the river. But not anymore."

Garcia joined the Sonora River Basin Committees to help local residents have a voice in the remediation process, and she’s excited to see their legal successes over the last five years. But she said there’s a long way to go before life on the Rio Sonora will be back to normal.

“I for one won’t get into that water,” she said, describing the river before the spill as a part of everyday life, from getting to work to recreation. “And I have a son, and he won’t have that experience that the rest of us did growing up in the Rio Sonora valley.”

But while the aftermath of the contamination has caused many people to leave the little towns along the river, Garcia and many others are staying put.

“I don’t want to leave. It’s where I was born. It’s where I grew up,” she said.

The Sonora River valley is her home. And she wants to stay.

water cistern from Grupo México
Kendal Blust/KJZZ
Many homes in the Rio Sonora valley have water cisterns provided by Grupo México after the toxic waste spill from its Buenavista de cobre mine in Cananea, Sonora.
Fields near the Rio Sonora
Kendal Blust/KJZZ
Cattle pastures near the Rio Sonora are bright green after the summer rains in Baviácora, Sonora on July 30, 2019.
Rio Sonora Valley
Kendal Blust/KJZZ
A view of the Rio Sonora valley from a hillside in Baviácora, Sonora on July 30, 2019.
Rio Sonora
Kendal Blust/KJZZ
The Rio Sonora flows through the town of Baviácora, Sonora on July 30, 2019.
Cow
Kendal Blust/KJZZ
A cow grazes in the pastures abutting the Rio Sonora in Bavi.
Jose Luis Salazar and Martha Velarde
Kendal Blust/KJZZ
Martha Velarde and her husband Jose Luis Salazar in their home in Baviácora, Sonora on July 30, 2019.
Baviácora
Kendal Blust/KJZZ
The church towers in Baviácora's main square seen from north of the city on July 30, 2019.

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