Federal Scientists Leak A Startling Climate Report To Keep Trump From Burying It

Chris D’Angelo, HuffPost      August 7, 2017

WASHINGTON — Government scientists agree that, contrary to President Donald Trump and his team’s repeated claims, climate change is already having a dramatic effect in the U.S., according to a new report.

The 543-page report, an unreleased draft published Monday by The New York Times, is written by scientists from 13 federal agencies, including the Environmental Protection Agency and the National Oceanic and Atmospheric Administration. It concludes that temperatures in the U.S. have risen sharply, by 1.6 degrees Fahrenheit, over the last 150 years and that it is “extremely likely that most of the global mean temperature increase since 1951 was caused by human influence on climate.”

“Evidence for a changing climate abounds, from the top of the atmosphere to the depths of the oceans,” the report states. “Thousands of studies conducted by tens of thousands of scientists around the world have documented changes in surface, atmospheric, and oceanic temperatures; melting glaciers; disappearing snow cover; shrinking sea ice; rising sea level; and an increase in atmospheric water vapor. Many lines of evidence demonstrate that human activities, especially emissions of greenhouse (heat-trapping) gases, are primarily responsible for recent observed climate changes.”

The report, completed this year and part of the National Climate Assessment, has already been approved by the National Academy of Sciences, according to the Times. Its release hinges on the Trump administration’s approval, and one scientist who worked on the report told the Times that he and others feared the president would withhold it.

The report also finds that the average annual temperature will continue to rise throughout the century. Even if humans ceased burning fossil fuels altogether, global temperatures would climb another half a degree Fahrenheit (0.30 degrees Celsius) over this century.

With “very high confidence,” the scientists concluded that “the magnitude of climate change beyond the next few decades depends primarily on the additional amount of greenhouse gases emitted globally.”

Also, the frequency of extreme weather events, including heavy rain and heat waves, have increased and are very likely to continue to do so. And since 1880, global sea levels have risen 8 to 9 inches — roughly 3 of those inches since 1990 — with human activity playing a substantial role, according to the report.

In a post to Twitter, Gavin Schmidt, a climate scientist and director of the NASA Goddard Institute for Space Studies, said that nothing in the report is surprising for people working in the field but that it may be “shocking to those that think [climate change] is just a future problem.”

The report delivers a strikingly different message than the one being pushed by Trump and his Cabinet members, who continue to downplay the urgency of the threat as they work toward “energy dominance.” Since taking office, Trump — who famously called climate change “bullshit” and a Chinese “hoax” — has moved quickly to derail America’s actions to combat climate change, including rolling back President Barack Obama’s Clean Power Plan, a policy limiting greenhouse gas emissions from power plants. Trump has pegged himself as a savior of America’s dying coal industry and has vowed to increase oil and gas production, opening now protected areas of the Arctic and Atlantic oceans to drilling.

In June he announced plans to pull the U.S. out of the historic Paris Agreement on climate change ― the international accord in which nearly 200 countries committed to slashing carbon emissions in an effort to prevent global temperatures from increasing 2 degrees Celsius above pre-industrial levels, the line scientists say the world must stay below to stave off the very worst effects of climate change.

Meanwhile, his Cabinet members have refused to say whether Trump believes climate change is real and continue to question how much the scientific community understands about the threat and the role humans play in observed changes.

In March, Environmental Protection Agency head Scott Pruitt told CNBC, “No, I would not agree that [carbon dioxide is] a primary contributor to the global warming that we see.” And in June, Energy Secretary Rick Perry echoed Pruitt’s comments, saying “no” when asked by CNBC whether he believes carbon dioxide “is the primary control knob for the temperature of the Earth and for climate.”

“Most likely the primary control knob is the ocean waters and this environment that we live in,” Perry said. “I mean, the fact is, this shouldn’t be a debate about, ‘Is the climate changing? Is man having an effect on it?’ Yeah, we are. The question should be, you know, just how much, and what are the policy changes that we need to make to affect that?”

Perry went on to defend his and others’ climate change denial, suggesting that those who question the scientific community’s findings are more intelligent.

Also in June, Interior Secretary Ryan Zinke said glaciers in Montana’s Glacier National Park started melting “right after the end of the Ice Age” and that it has “been a consistent melt.” He also dismissed the notion that government scientists can predict with certainty how much warming will occur by 2100 under a business-as-usual scenario.

This article originally appeared on HuffPost.

New York Times

Scientists Fear Trump Will Dismiss Blunt Climate Report

By Lisa Friedman       August 7, 2017

Photo

The coal-burning Plant Scherer in Juliette, Ga., is one of the top emitters of carbon dioxide in the United States. A draft report by government scientists concludes that Americans are feeling the effects of climate change right now. Credit Branden Camp/Associated Press

WASHINGTON — The average temperature in the United States has risen rapidly and drastically since 1980, and recent decades have been the warmest of the past 1,500 years, according to a sweeping federal climate change report awaiting approval by the Trump administration.

The draft report by scientists from 13 federal agencies, which has not yet been made public, concludes that Americans are feeling the effects of climate change right now. It directly contradicts claims by President Trump and members of his cabinet who say that the human contribution to climate change is uncertain, and that the ability to predict the effects is limited.

“Evidence for a changing climate abounds, from the top of the atmosphere to the depths of the oceans,” a draft of the report states. A copy of it was obtained by The New York Times.

The authors note that thousands of studies, conducted by tens of thousands of scientists, have documented climate changes on land and in the air. “Many lines of evidence demonstrate that human activities, especially emissions of greenhouse (heat-trapping) gases, are primarily responsible for recent observed climate change,” they wrote.

The report was completed this year and is a special science section of the National Climate Assessment, which is congressionally mandated every four years. The National Academy of Sciences has signed off on the draft report, and the authors are awaiting permission from the Trump administration to release it.

One government scientist who worked on the report, Katharine Hayhoe, a professor of political science at Texas Tech University, called the conclusions among “the most comprehensive climate science reports” to be published. Another scientist involved in the process, who spoke to The New York Times on the condition of anonymity, said he and others were concerned that it would be suppressed.

Document

Read the Draft of the Climate Change Report

A draft report by scientists from 13 federal agencies, which has not yet been made public but was obtained by The New York Times, concludes that Americans are feeling the effects of climate change right now.

OPEN Document

The White House and the Environmental Protection Agency did not immediately return calls or respond to emails requesting comment on Monday night.

The report concludes that even if humans immediately stopped emitting greenhouse gases into the atmosphere, the world would still feel at least an additional 0.50 degrees Fahrenheit (0.30 degrees Celsius) of warming over this century compared with today. The projected actual rise, scientists say, will be as much as 2 degrees Celsius.

A small difference in global temperatures can make a big difference in the climate: The difference between a rise in global temperatures of 1.5 degrees Celsius and one of 2 degrees Celsius, for example, could mean longer heat waves, more intense rainstorms and the faster disintegration of coral reefs.

Among the more significant of the study’s findings is that it is possible to attribute some extreme weather to climate change. The field known as “attribution science” has advanced rapidly in response to increasing risks from climate change.

The E.P.A. is one of 13 agencies that must approve the report by Aug. 18. The agency’s administrator, Scott Pruitt, has said he does not believe that carbon dioxide is a primary contributor to global warming.

“It’s a fraught situation,” said Michael Oppenheimer, a professor of geoscience and international affairs at Princeton University who was not involved in the study. “This is the first case in which an analysis of climate change of this scope has come up in the Trump administration, and scientists will be watching very carefully to see how they handle it.”

Scientists say they fear that the Trump administration could change or suppress the report. But those who challenge scientific data on human-caused climate change say they are equally worried that the draft report, as well as the larger National Climate Assessment, will be publicly released.

The National Climate Assessment “seems to be on autopilot” because of a lack of political direction, said Myron Ebell, a senior fellow at the Competitive Enterprise Institute.

The report says significant advances have been made linking human influence to individual extreme weather events since the last National Climate Assessment was produced in 2014. Still, it notes, crucial uncertainties remain.

It cites the European heat wave of 2003 and the record heat in Australia in 2013 as specific episodes where “relatively strong evidence” showed that a man-made factor contributed to the extreme weather.

In the United States, the authors write, the heat wave that broiled Texas in 2011 was more complicated. That year was Texas’ driest on record, and one study cited in the report said local weather variability and La Niña were the primary causes, with a “relatively small” warming contribution. Another study had concluded that climate change made extreme events 20 times more likely in Texas.

Based on those and other conflicting studies, the federal draft concludes that there was a medium likelihood that climate change played a role in the Texas heat wave. But it avoids assessing other individual weather events for their link to climate change. Generally, the report described linking recent major droughts in the United States to human activity as “complicated,” saying that while many droughts have been long and severe, they have not been unprecedented in the earth’s hydrologic natural variation.

Worldwide, the draft report finds it “extremely likely” that more than half of the global mean temperature increase since 1951 can be linked to human influence.

In the United States, the report concludes with “very high” confidence that the number and severity of cool nights have decreased since the 1960s, while the frequency and severity of warm days have increased. Extreme cold waves, it says, are less common since the 1980s, while extreme heat waves are more common.

Graphic: How Americans Think About Climate Change, in Six Maps

The study examines every corner of the United States and finds that all of it was touched by climate change. The average annual temperature in the United States will continue to rise, the authors write, making recent record-setting years “relatively common” in the near future. It projects increases of 5.0 to 7.5 degrees Fahrenheit (2.8 to 4.8 degrees Celsius) by the late century, depending on the level of future emissions.

It says the average annual rainfall across the country has increased by about 4 percent since the beginning of the 20th century. Parts of the West, Southwest and Southeast are drying up, while the Southern Plains and the Midwest are getting wetter.

With a medium degree of confidence, the authors linked the contribution of human-caused warming to rising temperatures over the Western and Northern United States. It found no direct link in the Southeast.

Additionally, the government scientists wrote that surface, air and ground temperatures in Alaska and the Arctic are rising at a frighteningly fast rate — twice as fast as the global average.

“It is very likely that the accelerated rate of Arctic warming will have a significant consequence for the United States due to accelerating land and sea ice melting that is driving changes in the ocean including sea level rise threatening our coastal communities,” the report says.

Human activity, the report goes on to say, is a primary culprit.

The study does not make policy recommendations, but it notes that stabilizing the global mean temperature increase to 2 degrees Celsius — what scientists have referred to as the guardrail beyond which changes become catastrophic — will require significant reductions in global levels of carbon dioxide.

Nearly 200 nations agreed as part of the Paris accords to limit or cut fossil fuel emissions. If countries make good on those promises, the federal report says, that will be a key step toward keeping global warming at manageable levels.

Mr. Trump announced this year that the United States would withdraw from the Paris agreement, saying the deal was bad for America.

AFP

Government report sees drastic climate change impact in US: NYT

AFP     August 7, 2017

Washington (AFP) – Average US temperatures have risen dramatically and fast, with recent decades the warmest of the past 1,500 years, according to a draft federal government report cited by The New York Times on Tuesday.

“Americans are feeling the effects of climate change right now,” said the report by 13 federal agencies not yet released or approved by President Donald Trump’s administration.

The report “directly contradicts claims by President Trump and members of his cabinet who say that the human contribution to climate change is uncertain and that the ability to predict the effects is limited,” the Times said.

The draft report, part of the United States National Climate Assessment, is done every four years. It has been signed by the National Academy of Sciences.

“How much more the climate will change depends on future emissions and the sensitivity of the climate system to those emissions,” the draft report states in the Times article.

The United States just announced Friday it would still take part in international climate change negotiations in order to protect its interests, despite its planned withdrawal from the Paris accord on global warming.

Two months after Trump announced the United States would abandon the 2015 global pact, his administration confirmed it had informed the United Nations of its “intent to withdraw from the Paris Agreement” — a process that will take at least until 2020.

The United States is the world’s second biggest producer of greenhouse gases after China and its withdrawal was a seen as a body blow to the Paris agreement.

The accord commits signatories to efforts to reduce greenhouse gas emissions that cause global warming, which is blamed for melting ice caps and glaciers, rising sea levels and more violent weather events.

They vowed steps to keep the worldwide rise in temperatures “well below” two degrees Celsius (3.6 degrees Fahrenheit) from pre-industrial times and to “pursue efforts” to hold the increase under 1.5 degrees Celsius.

EcoWatch

Costa Rica Wants to Become World’s First Country to Eliminate Single-Use Plastics

Lorraine Chow    August 7, 2017

Costa Rica wants to become the world’s first country to achieve a comprehensive national strategy to eliminate single-use plastics by 2021.

The Central American nation intends to replace these wasteful, ocean-clogging items—such as plastic store bags, straws, coffee stirrers, containers and plastic cutlery—for biodegradable or water-soluble alternatives, or products made of renewable materials (think plant starches).

The initiative is led by Costa Rica’s Ministries of Health and Environment and Energy with support from the United Nations Development Programme (UNDP) and from local governments, civil society and various private sector groups.

Costa Rican government officials announced the country’s ambitious plan on June 5, World Environment Day.

“Being a country free of single use plastics is our mantra and our mission,” according to a joint statement from Environment and Energy minister Edgar Gutiérrez, Health minister María Esther Anchía, and Alice Shackelford, resident representative for UNDP Costa Rica.

“It’s not going to be easy, and the government can’t do it alone,” the statement continues. “To promote these changes, we need all sectors—public and private—to commit to actions to replace single-use plastic through five strategic actions: municipal incentives, policies and institutional guidelines for suppliers; replacement of single-use plastic products; research and development—and investment in strategic initiatives.”

“We also need the leadership and participation of all: women, men, boys and girls,” the statement notes.

Costa Rica has emerged as an global environmental leader, with its frequent 100 percent renewable energy streaks and its 2021 goal of becoming carbon neutral—a deadline set a decade ago.

However, the officials point out in their statement that Costa Rica’s impressive environmental record still has room for improvement.

“Although the country has been an example to the world by reversing deforestation and doubling its forest cover from 26 percent in 1984 to more than 52 percent this year, today one fifth of the 4,000 tonnes of solid waste produced daily is not collected and ends up as part of the Costa Rican landscape, also polluting rivers and beaches,” they explain.

“Single-use plastics are a problem not only for Costa Rica but also for the whole world,” they add. “It is estimated that if the current consumption pattern continues, by 2050 there will be more plastic in our oceans than fish—measured by weight. For this reason, we began our journey to turn Costa Rica into a single-use plastic-free zone.”

“It’s a win-win for all: Costa Rica, the people and the planet.”

Washington Post-A flood of problems

Peru’s glaciers have made it a laboratory for adapting to climate change. It’s not going well.

Story by Nick Miroff, Photos by Jabin Botsford      August 7, 2017

An Andes mountain range and a cross headstone are seen from Cementerio Municipal De Huaraz in Huaraz, in the Ancash region of Peru, on July 13.

LAKE PALCACOCHA, Peru

After a day of bright sunshine, a chunk of ice the size of a dump truck broke off the glacier on Mount Pucaranra a few weeks ago. It plunged into the lake below and kicked up a wave nine feet high.

Victor Morales, a small, catlike man with a tattered ski cap who is the lake’s solitary watchman, scrambled up to a stone hut on the side of the mountain and got on the radio. The wave had damaged an emergency drainage system meant to reduce the volume of the lake. But to his great relief, the earthen dam holding back the water was intact.

Sources: National Snow and Ice Data Center, Google Earth

Above: An Andes mountain range and a cross headstone are seen from Cementerio Municipal De Huaraz in Huaraz, in the Ancash region of Peru, on July 13.

“It wasn’t a big avalanche,” Morales said.

Lake Palcacocha is a mile long and 250 feet deep, and the effect of a large avalanche would be similar to dropping a bowling ball in a bathtub. Modeling scenarios predict a 100-foot wave so powerful it would blow out the dam. Three billion gallons of ice water would go roaring down the mountain toward the city of Huaraz, burying its 200,000 residents under an Andean tsunami of mud, trees and bouldersSources: National Snow and Ice Data Center,  Google Earth

Lake Palcacocha is an example of the immediate threats Peru and other developing countries are facing from climate change. The country is especially vulnerable since it is home to 70 percent of the world’s “tropical glaciers” — small, high-altitude ice caps found at the earth’s middle latitudes. Their disappearance has made Peru something of a laboratory for human adaptation to climate change.

So far, it’s not going very well.

“For countries like Peru that are trying to climb out of poverty, there are major social, cultural and economic obstacles to adaptation,” said Nelson Santillán, a researcher at Peru’s national water authority. “Identifying risks is one thing, but doing something about them is another.”

In the weeks since President Trump announced the United States would renege on its commitment to the Paris climate accord, scientists have pointed to new signs the planet is edging closer to a precipice. Maximum temperature records continue falling. New cracks are opening at the polar ice caps.

Peru’s high-altitude glaciers are tiny by comparison, but millions of people depend on their runoff for water, food and hydroelectricity.

Some of Peru’s glaciers have lost more than 90 percent of their mass. While much of the water trickles harmlessly down the mountainside, in places like Lake Palcacocha, it is pooling in great big puddles of melted ice. Many of these new lakes are held back by glacial moraines, which are essentially mounds of compressed sediments. They may be structurally weak, and as the volume of water pushing on them increases, some will collapse.

“We have glaciers across 19 — no, 18 — mountain ranges,” said Marco Zapata, the head of Peru’s institute for glacier research, correcting himself to reflect the latest monitoring data.

“They’re all shrinking.”

For Peruvian authorities, this is becoming more of an engineering problem than an environmental lament. Without reliable glacial runoff, the country’s water and irrigation systems will need to be retooled. New dams and reservoirs will be needed to more effectively store water. Investments in agriculture and other water-intensive industries will need to be recalculated.

“The glacier used to come down to there,” said Tomás Rosario, 45, who farms in the shadow of 22,000-foot Huascaran, Peru’s highest peak. He pointed at a ridge above his village, where bare rock was exposed. “Now the snow is gone and we’re running out of water.”

Victor Morales, the solitary watchman whose job is to call the city of Huaraz to warn of potential floods, waits for breakfast in his stone hut near Lake Palcacocha, a swollen glacial lake in the Andes mountain range.

Drought’s dire impact

Last November, in the middle of a crippling drought, a rumor began to spread in Rosario’s tiny town of Soledad and in other Quechua-speaking villages whose residents grow potatoes and corn on the flanks of mountains here.

The rainy season was late, the fields were parched and livestock were dying. The government said global warming was making matters worse.

The villagers, not unlike climate-change skeptics in the United States, did not believe it.

Their suspicions fell instead on the strange machines that foreign scientists and aid workers from the nonprofit group CARE Peru had installed with great fanfare at Lago 513, another swollen glacial lake not far from Lake Palcacocha.

Alejandro Rosales, 61, talks about about his poor corn harvest this year because of low rainfall. He wants the regional government to complete an irrigation project that would grant his town access to more water from the glacial runoff in Yarush.

The $250,000 emergency warning system included a monitoring station to alert residents living downstream in the town of Carhuaz (population 13,000) in case of a dam rupture. A 2010 flood triggered by an icefall at Lago 513 destroyed dozens of homes.

But in the middle of a drought, no one was especially worried about flooding. Years of disappointing rainfall were sowing anxieties up and down the valley.

Then the rumors picked up. “Everyone was saying that the gringos’ machines were scaring away the rain,” said Feliciana Quito, who farms a small plot downstream from the lake.

Jesús Caballero, the Carhuaz mayor, said he wanted to set the villagers straight, so he offered to hike up to the lake one morning in November to show them the “gringo machines” were harmless.

But when Caballero arrived at the lake that day, he said, it was clear the villagers were not interested in a climate lecture. Some of the young men were carrying sticks. This was a lynch mob.

“I told them the equipment had nothing to do with the rain,” Caballero said. “But I was rowing against the current.”

The villagers attacked the monitoring station, tearing out the antennas and solar panels. They bludgeoned some of the instruments and carried the rest back down the mountain, triumphant, as if they had slayed a dragon.

The rains came three days later, ending the drought. The villagers were jubilant. Their climate science was vindicated.

But now the lake has no emergency warning system in case the dam bursts. The farmers say they will not allow the foreigners to put the equipment back in, let alone drive through their village. When CARE Peru sent a team to inspect the damage, they were stopped on the road by women carrying rocks, threatening to stone them.

“We’re not going to let anyone put anything up there that interferes with the rain,” said Rosario, who was one of the expeditionaries who went to the lake that day.

Caballero said the episode has demonstrated the need for greater sensitivity to the fears of rural villagers whose lives and traditions are upended by water shortages and extreme weather.

What is left of the old monitoring system is now locked in a storage room opposite the Carhuaz city hall. Caballero said he thinks he can get the villagers’ approval to put the equipment back in if there is another drought this fall, because it would prove his point that the machines have nothing to do with the rain.

Then again, he said, the villagers may direct their anger at the emergency monitoring systems installed at other nearby lakes, such as Lake Palcacocha. “If the rains don’t come, I worry they’ll march up there and tear the other equipment out, too,” he said.

A sheep joins a group of people as they sit at an overlook in Huaraz. Police officers cordon off streets during a drill to prepare for a potential flood triggered by a dam rupture at the swollen glacial lake upstream in Huaraz. People make their way through the market near Plaza de Armas in Carhuaz.

Population boom 

It would be especially unwise to attack the monitoring station at Lake Palcacocha.

A moraine dam at the lake collapsed in December 1941, and the flood it unleashed killed several thousand people in Huaraz. The city only had 17,000 residents at the time. Since then its population has exploded, as farmers in the surrounding hills have been lured to the city by jobs in mining and tourism.

Land was cheap along the riverbanks, and today the flood zone is the most heavily populated part of the Huaraz, with schools, hospitals and a stadium.

Siphon pipes lead up the mountain to Lake Palcacocha. The siphons were installed to reduce the lake’s volume and to prevent a dam rupture. Nonetheless, the siphons were damaged in the recent icefall, and only a pair remains in operation.

The Peruvian government launched dozens of flood control projects across the Andes after the 1941 disaster, adding an emergency spillway at Lake Palcacocha. When a 7.9 earthquake hit in 1970 and much of Huaraz was destroyed again, thousands died, but the dam held.

But since then the volume of the lake has increased 34-fold as glacial melting accelerates. Lake Palcacocha rose so high in 2011 that authorities declared an emergency, and soon after a series of flexible plastic pipes were installed to siphon off water from the surface like giant soda straws.

The siphons lowered the height of the lake by nearly 20 feet, but they were damaged in recent icefall, and only two are now working.

A major avalanche would toss the pipes from the lake like wet noodles, and the spillway tunnel that is the dam’s last safety valve would be quickly clogged with rock and ice.

Draining the lake to a safer level can be done with relatively simple engineering techniques that would cost only about $7 million, environment ministry officials say. In contrast, a dam failure and catastrophic flooding in Huaraz would inflict more than $2.5 billion in damage, in addition to causing thousands of deaths.

But fixing Palcacocha has become a source of fierce debate. The lake is inside a national park, where big engineering projects are not welcome. While the central government in Lima is eager to drain the lake, local farmers say they need the water, and want new reservoirs that would store it elsewhere and redistribute the load.

These proposals are muddied by deep distrust. The last three regional governors from Huaraz have been jailed on graft charges, and the reputation of the central government in Lima isn’t much better, as two former presidents are also under indictment for corruption.

While the threats of climate change are new, the shortcomings of the political system are not, said Jahir Anicama, head of the CARE Peru office in Huaraz. “In the end, it’s a matter of effective government,” he said.

Officials and aid groups have been focused on disaster prevention, but he said the latest conflicts show the need to address the full range of fears that will probably intensify as the glaciers vanish and water supplies grow more irregular.

“We’ve been focused on future flood risks, but that’s not the biggest worry for these farmers,” he said. “They want projects that give them access to water, and they want them now.”

The Environmental Working Group EWG

Drinking Water and Children’s Health

By Sonya Lunder, Senior Analyst     July 26, 2017

Toxic pollutants in drinking water are particularly hazardous for children. Compared to adults, children drink more water per pound of body weight, resulting in greater exposure and greater risk. They’re also more vulnerable to harmful contaminants because their bodies are still growing and toxic chemicals cause more harm to developing organs and tissues.

EWG set out to find which tap water contaminants pose the greatest risks for children in America today. We reviewed drinking water reports from nearly 50,000 water companies or utilities nationwide, collected between 2010 and 2015, and compared test results to science-based health guidelines.

According to EWG’s Tap Water Database, drinking water supplies for millions of American children and adults have higher amounts of 90 contaminants than scientists consider safe, even if the water gets a passing grade from the federal government. This number doesn’t account for the exposures of the more than 40 million people who drink water from private wells, which are not routinely monitored for contaminants.

Some drinking water contaminants are more harmful when exposure occurs during critical windows in a child’s development. These exposures can have serious effects on health that continue for a lifetime, or their impact on health may surface decades later. Overall, the data show:

• More than 250 detected contaminants – and the more we test the more we find;
• 93 chemicals linked to cancer;
• 78 chemicals linked to brain and nervous system problems;
• 63 contaminants that can harm development of the fetus or young child;
• 38 contaminants linked to human fertility problems; and
• At least 45 contaminants linked to hormone disruption.

For some chemicals, researchers don’t know if or how exposure can affect a child’s development or harm the finely balanced hormonal system because subtle alterations can be hard to detect. The data collected by EWG may be an underestimate of the full range of health concerns for drinking water contaminants.

Tap water and bottle-fed babies

Water contamination is especially concerning for bottle-fed infants.

A baby fed exclusively powdered formula mixed with tap water drinks the most water for its small size of any age group. Tap water can be 85 percent of a formula-fed baby’s diet, and this period of intense exposure can last four to six months, until parents start supplementing formula with food.

Here are five contaminants to watch out for:

Lead

A potent neurotoxin, lead is particularly harmful during pregnancy and early childhood. Old, corroded lead pipes and plumbing are common sources of lead in drinking water, and additional exposures come from paint, soil and contaminated household dust.

Under the federal Lead and Copper Rule, if lead concentrations exceed an action level of 15 parts per billion, or ppb, in more than 10 percent of sampled homes, the water utility must apply measures to control lead leaching from the pipes. However, there is no amount of lead exposure scientists consider safe.

Recent Environmental Protection Agency modeling suggests that lead concentrations in excess of 3.8 ppb could boost some children’s lead exposure above acceptable levels. Meanwhile, the Food and Drug Administration limits lead in bottled water to 5 ppb, and California has set a public health goal of 0.2 ppb lead in tap water to protect children’s’ brains and prevent the loss of IQ points.

The data collected by EWG show that more than 19,000 U.S. water utilities have reported some residences with lead levels exceeding 3.8 ppb between 2010 and 2015. Lead levels vary from house to house based on the presence of lead in pipes and solder. Tests performed in your city might not reflect specific lead risks in your home. If you are pregnant or have young children, consider having your tap water tested for lead.

Read more about lead in drinking water. 

Nitrate

The federal government allows up to 10 parts per million, or ppm, of nitrate in

water, but EWG recommends that nitrate levels should not exceed 5 ppm, based on emerging evidence that nitrate causes problems during pregnancy and could increase risks of cancer. In excess of 10 milligrams per liter, nitrate can block the blood’s ability to carry oxygen, which can severely harm bottle-fed infants.

EWG data show that in 2015, 7 million Americans drank water with nitrate levels at an average of 5 ppm or greater, exceeding the level the National Cancer Institute research shows increases the risk of cancer. Additionally, many Americans drink nitrate-contaminated water from private wells, which are not routinely monitored for contamination.

Read more about nitrate in drinking water.

Atrazine 

Atrazine, an herbicide linked to hormone disruption, is found in the water supplies of at least 30 million Americans. Federal laws allow up to 3 ppb of atrazine in treated tap water, but human epidemiological studies suggest that federal standards for atrazine are inadequate to protect public health.

In agricultural areas, atrazine and nitrate are frequently present together in drinking water, and the mixture of the chemicals could have a cumulative effect. Researchers from the University of Illinois reported a statistically significant association between the presence of atrazine in drinking water and preterm births. The average concentration of atrazine in the study was one-seventh of the federal legal limit. The same research team found that the effect may be exacerbated by the simultaneous presence of nitrate.

Scientists don’t know exactly how atrazine affects the developing fetus or infant, but the risks from even low levels of exposure are clear. In 1999, scientists in California Office of Environmental Health Hazard Assessment set a public health goal of 0.15 ppb for atrazine in drinking water. EWG recommends people filter drinking water if it contains atrazine concentrations above this amount.

Read more about atrazine in drinking water.

Manganese 

Manganese is a naturally occurring metal, found in food and water, and may be added to food supplements. It leaches from rocks and soil into drinking water. Several recent studies show lower IQ scores, and lower verbal and behavioral performance scores in children who live in areas with higher concentrations of manganese in water. Scientists remain puzzled by the fact that manganese also occurs naturally in food, but food doesn’t seem to be associated with the same harmful effects.

EWG supports the state of Minnesota’s guideline that formula-fed babies not drink water with more than 100 ppb of manganese. Manganese in excess of this level is found in water served to more than 10 million Americans.

Read more about manganese in drinking water.

Fluoride 

Unlike other chemicals monitored by water systems, fluoride is intentionally added to drinking water, even though research clearly shows that fluoride is most effective when used topically in toothpaste and not ingested.

In 2011, responding to a lawsuit by EWG and other advocacy groups, the Department of Health and Human Services recommended that water utilities reduce the amount of fluoride added to water to 0.7 ppm – down from the previous federal recommendation allowing up to 1.2 ppm fluoride in drinking water. This new recommendation took effect in 2015.

The Centers for Disease Control and Prevention state that if infant formula is mixed with fluoridated water, the baby’s teeth might be affected by dental fluorosis, which appears as white spot markings on the teeth.

EWG recommends that baby formula be mixed with fluoride-free water, especially for infants whose diet is exclusively powdered baby formula.

Federal drinking water regulations do not protect children

EWG believes that federal drinking water regulations must give special consideration to the exposure and toxicity of drinking water contaminants for young children. Yet, many existing national drinking water standards have been developed for an adult weighing 70 kilograms, or 154 pounds – not for a child or an infant. That’s why we published our own EWG Standards, which are limits drawn from the best scientific research that put children’s health first.

What can I do to protect my kids from tap water contaminants?

The best way to reduce your children’s exposures to harmful chemicals in drinking water is to install an effective in-home filter. Look to the EWG Water Filter Guide to find the right filter to remove the specific contaminants in your water and fit your budget.

For atrazine and lead: Even a simple countertop pitcher with a carbon filter can work.

• See filters for atrazine.
• See filters for lead.

For fluoride, manganese and nitrate: Reverse osmosis is the most reliable system for removing these contaminants. Click here to see reverse osmosis filters.

And after you get a filter for your home, don’t stop there. Reach out to local, state and federal officials to ask them hard questions about water quality, and hold them accountable for making sure all American children have safe water in their homes. Click here to see EWG guide, “7 Questions to Ask Your Elected Officials About Tap Water.”

Look out for future research from EWG on tap water

In the coming months, EWG will publish a series of reports for parents, future parents, and everyone interested in children’s health and drinking water. Look for advice on drinking water during pregnancy and nursing, information on contaminants to avoid, the latest research on chemicals in water such as hormones and hormonal disruptors, and how we can make children’s health a priority in national drinking water policy.