11 cities with the worst tap water in the US

dirty tap water
  • Millions of people are exposed to unsafe drinking water every year in the US.
  • Industrial towns like Pittsburgh and Detroit have discovered unsafe levels of lead in their water, which can lead to permanent brain damage in children.
  • Other cities are reeling from the aftermath of chemical spills, which have released toxic substances into their main water supplies.

Imagine turning on the tap in the morning to find an unpleasant brown sludge that tastes like metal. Then imagine that state officials told you that water was safe to drink.

That was the reality for residents of Flint, Michigan in 2014, when lead from aging pipes seeped into their water system, effectively poisoning an entire community.

The scandal was one of the most egregious instances of water contamination in the US, but it wasn't an isolated occurrence. Every year from1982 to 2015, between 9 million and 45 million Americans got their drinking water from a source that violated the standards of the Environmental Protection Agency (EPA).


While rural areas are the most contaminated, a few major cities have struggled to renovate their aging pipes and enforce safe standards among local jurisdictions. Here are some of the cities with the worst tap water in the US.

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In 2017, the Pittsburgh Water and Sewer Authority issued a warning to residents to boil their tap water before drinking it. Even basic activities like brushing teeth or washing dishes should be done with boiled water, they said.

The alert went out after Pennsylvania's environmental regulators discovered low levels of chlorine in the water system, which could potentially expose residents to a parasite called giardia that causes diarrhea, cramps, and nausea.

The city has also struggled to combat high levels of lead in drinking water, with the EPA reporting that there are not enough state officials to perform mandatory inspections. A 2017 audit revealed that health officials in Pittsburgh may have misled residents into thinking that their drinking water was safe.


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Milwaukee has also been mired in scandal when it comes to safe drinking water. In 2018, the city's health commissioner, Bevan Baker, resigned amid news that public health officials failed to warn families whose children tested positive for elevated lead levels from 2015 to 2017.

Residents were previously told to install water filters if they lived in a home built prior to 1951 due to concerns about lead contamination. In 2018, environmental activists called upon Milwaukee's mayor , Tom Barrett, to resign over the crisis.


Reuters/Rebecca Cook

Flint residents may no longer be encountering the same odorous brown sludge they discovered in 2014, but local politicians are still worried about whether the tap water is contaminated.

In 2017, after three years of distributing bottled water to local residents, Flint officials declared the water safe to consume. But Michigan congressman Dan Kildee has said that the city can't trust its water supply until all of the lead service pipes had been replaced. Flint is currently working to replace its old pipes by 2020.


Kimberly P. Mitchell/Detroit Free Press/TNS/Getty Images

Michigan's aging infrastructure has posed a similar problem in Detroit, which began testing water supplies in schools in the wake of the Flint crisis.

In September 2018, at least 57 out of86Detroit public schools tested positive for elevated levels of copper or lead. Children exposed to lead can suffer from permanent brain damage, which often results in learning disabilities and increased violent behavior.

The results prompted Detroit's school district to shut off water fountains in public schools across the city and replace them with temporary water coolers. The city is now working to install filtration systems in every public school.


Julio Cortez/AP Images

Newark's lead-contaminated drinking water has reached crisis levels.

In January, New Jersey state monitors revealed that lead contamination in the city was at an all-time high over the last 17 years. From July 2018 to December 2018, around 100 out of 240 samples from Newark's water system showed lead levels above the EPA's safety threshold.

Officials have also discovered high levels of haloacetic acids (HAAs), which can form during the water disinfecting process, cause skin irritation, and potentially increase cancer risk . Nine of the city's dozen testing sites have shown high levels of HAAs.


The city is now distributing tens of thousands of water filters to local residents. It's also working to replace its lead service lines , a process that could take eight years.

Astrid Riecken/The Washington Post/Getty Images

DC's legacy of contamination dates back to the early 2000s, when Marc Edwards the same man who sounded the alarm on the Flint water crisis warned residents of elevated levels of lead in their drinking water.


By 2016, around 12,000 DC buildings were still getting their water from lead pipes. Many of the homes at risk of contamination are located in older, less affluent neighborhoods. On average, homeowners will have to pay around $2,500 to have their lead pipes removed.

Billy Hathorn/Wikimedia Commons

Texas has the most widespread water violations in the US, due in large part to the presence of radium a radioactive substance that's been linked to bone cancer in its water supply.


The small city of Brady, Texas, has encountered radium levels that are nine times higher than the EPA limit. Local residents report that the tap water can be orange, brown, or even green in color, and many have resorted to drinking bottled water instead.

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Baltimore's water samples don't contain nearly as much lead as samples in Newark or Detroit, but at least two dozen schools have been found to have elevated levels of lead in their drinking water.


The city's Druid Lake reservoir is also clouded with particles that can carry viruses, bacteria, or parasites. Officials are now embarking on a $140 million project to bring the reservoir up to safety standards.

Scott Smith/AP Images

Like Texas, California has a statewide water sanitation problem . At least one water supplier in 38 of California's 58 counties violates state water standards.


Many Central Valley cities have been hit hard by the California drought , which dried up wells and prompted excessive groundwater pumping that leached toxic levels of arsenic into the water supply.

In the city of Dos Palos, residents have switched over to bottled water after it was discovered that their water supply contained trihalomethanes , a group of chemicals that's been linked to kidney problems and increased cancer risk. From 2013 to 2018, the city's well failed at least 22 safety tests.

Jerry Pennington/Shutterstock


In 2014, residents of Charleston, West Virginia, noticed the smell of licorice wafting through their city. As it turns out, the odor hailed from a massive spill of MCHM, a chemical foam that's used to wash coal. If the chemical is inhaled or comes in contact with skin, it could cause vomiting or irritation such as itching or burning.

As late as 2017, officials continued to express concern about the safety of the city's drinking water. That same year, the nonprofit Environmental Working Group found multiple contaminants in the city's water supply.

Mike Groll/AP Images


In 2016, a 1.3 billion-gallon reservoir in Newburgh, New York, tested positive for a dangerous pollutant called perfluorooctane sulfonate (PFOS), which has been linked to cancer and chronic kidney disease. Back in 1990, the New York Air National Guard spilled fire-fighting foam , which contains PFOS, into a stream that's connected to the reservoir.

The discovery of PFOS prompted Newburgh to declare a state of emergency in 2016. The city has since installed a new filtration system, but residents are concerned that the only way to obtain safe drinking water is to have the reservoir cleaned up.

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