Contamination by lead of water supply in Flint, Michigan
The Flint water crisis was a 2010s public health crisis which involved the drinking water for the city of Flint, Michigan, being contaminated with lead and possibly "Legionella" bacteria. In April 2014, during a financial crisis, state-appointed emergency manager Darnell Earley changed Flint's water source from the Detroit Water and Sewerage Department (sourced from Lake Huron and the Detroit River) to the Flint River. Residents complained about the taste, smell, and appearance of the water. Officials failed to apply corrosion inhibitors to the water, which resulted in lead from aging pipes leaching into the water supply, exposing around 100,000 residents to elevated lead levels. A pair of scientific studies confirmed that lead contamination was present in the water supply. The city switched back to the Detroit water system on October 16, 2015. It later signed a 30-year contract with the new Great Lakes Water Authority (GLWA) on November 22, 2017.
On January 5, 2016, Michigan Governor Rick Snyder declared a state of emergency in Genesee County, of which Flint is the major population center. Shortly thereafter, President Barack Obama declared a federal state of emergency, authorizing additional help from the Federal Emergency Management Agency and the Department of Homeland Security.
Between 6,000 and 14,000 children were exposed to drinking water with high levels of lead. Children are particularly at risk from the long-term effects of lead poisoning, which can include a reduction in intellectual functioning and IQ, increased issues with mental and physical health, and an increased chance of Alzheimer's disease. The water supply change was considered a possible cause of an outbreak of Legionnaires' disease in the county that killed 12 people and affected another 87, but the original source of the bacteria was never found.
Four government officials—one from the city of Flint, two from the Michigan Department of Environmental Quality (MDEQ), and one from the Environmental Protection Agency (EPA)—resigned over the mishandling of the crisis, and one additional MDEQ staff member was fired. In January 2021, former Michigan Governor Rick Snyder and eight other officials were charged with 34 felony counts and seven misdemeanors—41 counts in all—for their role in the crisis. Two officials were charged with involuntary manslaughter. Fifteen criminal cases have been filed against local and state officials, but only one minor conviction has been obtained, and all other charges have been dismissed or dropped. On August 20, 2020, the victims of the water crisis were awarded a combined settlement of $600 million, with 80% going to the families of children affected by the crisis. By November, the settlement grew to $641 million.
An extensive lead service pipe replacement effort has been underway since 2016. In early 2017, some officials asserted that the water quality had returned to acceptable levels, but in January 2019, residents and officials expressed doubt about the cleanliness of the water. There were an estimated 2,500 lead service pipes still in place as of April 2019. As of December 8, 2020, fewer than 500 service lines still needed to be inspected. As of July 16, 2021, 27,133 water service lines had been excavated and inspected, resulting in the replacement of 10,059 lead pipes. After $400 million in state and federal spending, Flint has secured a clean water source, distributed filters to all who want them, and laid modern, safe, copper pipes to nearly every home in the city. "Politico" declared that its water is "just as good as any city's in Michigan." However, a legacy of distrust remains, so residents often refuse to drink the tap water.
Timeline.
The following is a sequence of events related to the Flint water crisis.
Background.
Some water service lines in Flint were installed between 1901 and 1920. As with many other municipalities at the time, all of the service lines from the cast iron water mains to end users' homes were constructed of lead, because it was relatively inexpensive and easy to work. Lead from the pipes can leach into the water, especially if certain contaminants are present. However, the water from the Detroit Water and Sewerage Department, where Flint had obtained its water since 1967, had been treated well enough that the leaching from the lead pipes was at levels considered acceptable by state and federal environmental protection agencies. There are an estimated 43,000 service lines in the city; when the crisis began, these included 3,500 lead lines, 9,000 known galvanized steel lines, and 9,000 unknown service lines.
Lead exposure across the U.S. has fallen dramatically since the 1980s, but no blood-lead level is considered completely safe. Children under age five, and especially infants and unborn children, bear the greatest risk of deleterious and irreversible health outcomes. From 2012 to 2016, the CDC set a "reference level" of 5 micrograms per deciliter (μg/dL), in order to target for case management the 2.5% of young American children with the highest blood-lead levels. At 45 μg/dL, chelation therapy is considered. Among the many ways lead can enter a modern American's bloodstream is through lead plumbing. Acidic water makes it easier for the lead found in pipes, leaded solder, and brass faucets to dissolve and to enter a home's drinking water. Therefore, public water treatment systems are legally required to use control measures to make water less acidic. Plumbing that contains lead is often found in buildings constructed in the 1980s and earlier.
Financial emergency.
From 2011 to 2015, Governor Snyder appointed four emergency managers to control Flint's finances. After 2015, the city continued to receive financial guidance under the lesser oversight of a Receivership Transition Advisory Board.
Transition to a new water source.
In 2011, Genesee County initiated the switch to the Karegnondi Water Authority (KWA); the KWA would supply water to both Genesee County and Flint. On March 25, 2013, the purchase of per day from the KWA was approved by the Flint City Council. The KWA informed the council that they could dig to Lake Huron (the new water supply) in 30 months using a bored tunnel. Ed Kurtz, Flint's emergency manager, along with Mayor Dayne Walling and Flint City Council, approved the action and awaited the State Treasurer's approval. Following this decision, the Detroit Water and Sewerage Department (DWSD) negotiated with Flint officials by offering to restructure water payments. Flint declined, preferring to use KWA.
On April 1, 2013, DWSD demanded that the state deny Flint's request, as it would start a water war, which would hurt DWSD. Drain Commissioner Wright of Genesee County accused the DWSD of media negotiation and then replied, "It would be unprecedented for the state to force one community to enter into an agreement with another, simply to artificially help one community at the other's expense ... this is exactly what the [Detroit Water and Sewerage Department] is arguing".
On April 15, 2013, State Treasurer Andy Dillon approved the water purchase contract with the KWA. Emergency Manager Kurtz signed the KWA water purchase agreement the following day. On April 17, the DWSD delivered its one-year termination notice after Flint rejected their last offer. The DWSD expected that Flint would reimburse the investments for the water system that benefited regional customers. Flint and Genesee County rejected such responsibility but indicated their willingness to purchase pipelines.
In April 2014, to save about $5 million in two years, Flint started treating water from the Flint River instead of purchasing Lake Huron water from Detroit. Previously, the Flint River was the backup water source. In June 2014, Flint's Emergency Manager Darnell Earley finalized the sale of a section of water pipeline to Genesee County for $3.9 million. This pipeline fed DWSD water into the county, and after the KWA pipeline was active, would service the eastern part of the county as well. By December 2014, the city had invested $4 million into its water plant. On July 1, 2014, Earley gave operational authority to Mayor Dayne Walling over two city departments, including Public Works. It was later reported that by not adding a corrosion inhibitor, Flint was going to save about $140 per day.
Early water contamination.
After the permanent switch to the Flint River, city residents began complaining about the color, taste, and odor of their water. In August and September 2014, city officials detected levels of coliform bacteria, so residents were advised to boil their water. MDEQ determined that cold weather, aging pipes, and a population decline were the cause of these bacteria. According to Stephen Busch, an MDEQ district supervisor, the city took appropriate measures to limit a recurrence. General Motors (GM) made the first complaint about the corrosivity of the water. GM stopped using Flint water in October 2014, after reporting that the water was corroding car parts. General Motors requested to switch back to the DWSD water source, which was later approved by city officials.
Prior to August 2014, additional chlorine had been added to eliminate bacteria from the Flint River. This is likely the cause of a spike in trihalomethanes, unsafe chlorine byproducts, in one of eight water locations. Long-term exposure to these chemicals has been linked to cancer and other diseases. Following this test, the MDEQ placed Flint on violation notice but did not reveal the information to residents until January 2015. The employees of the Flint Public Library declared the water undrinkable after noticing that it was discolored, despite the city's claim that the water was safe. Since 2014, the library has provided safe water for the public alongside the state's most prominent bottled water provider. January and February 2015 tests showed that the city water met all health and safety standards. Nevertheless, the DWSD offered to reconnect Flint, waiving a $4 million connection fee, but was declined by Emergency Manager Jerry Ambrose. MDEQ officials indicated that there is no "imminent threat to public health", as the nature of the issue was "communicated poorly".
Return to Detroit water.
In March 2015, Flint voted to switch back to the DWSD. This vote was motivated by residential complaints and recommendations from Veolia North America to prevent the city from further violating the Safe Drinking Water Act. Ambrose disagreed with the reintroduction of the Detroit water source. Ambrose argued, "Flint water today is safe by all Environmental Protection Agency and Michigan Department of Environmental Quality standards, and the city is working daily to improve its quality." In August 2015, it was found that local organizations observed that high concentrations of chloride caused the water to be orange and that the water contained high levels of lead. The lead levels were caused by the omission of orthophosphate treatments, which led to excessive pipe corrosion. Consequently, the three organizations "delivered more than 26,000 online petition signatures to Mayor Dayne Walling, demanding the city end its use of the Flint River and reconnect to the Detroit water system." Flint's water supply was switched back to DWSD in October 2015. Subsequently, Flint started adding additional orthophosphate to the water to rebuild the pipe lining.
On October 8, 2015, Snyder requested that Michigan legislators contribute $6 million of the $12 million for Flint to return to Lake Huron water. The city of Flint would pay $2 million, and the Flint-based Charles Stewart Mott Foundation would pay $4 million. Jim Ananich, the State Senator representing Flint, demanded that the state refund the $2 million to the city. Ananich also requested further emergency funding from the state and long-term funding to address the effects of the lead contamination. On March 2, 2016, Michigan declared that returning to the Detroit water system must be approved by the state. When approved, the city was granted an emergency loan of $7 million. On September 27, 2016, Flint officials announced that the city will continue to use Detroit water until a new stretch of pipeline is constructed and the Flint River is tested and treated by the KWA.
From August 2015 to November 2016, median water lead levels began to go down again depending on the type of water service pipes each home had. In homes with copper pipes, the median water lead level dropped from 3.0 micrograms per liter (μg/L) to ;1 μg/L; galvanized steel service lines dropped from a median water lead level of 7.2 μg/L to 1.9 μg/L, and lead service lines dropped from a median water lead level of 9.9 μg/L to 2.3 μg/L. 1 μg/L is equivalent to 1 part per billion. On December 9, 2016, the MDEQ reported that more than 96 percent of water samples in Flint residencies were