Water Quality InformationWritten By Actual Experts

Emma Schultz, M.S.  |  Scientific Contributor

There has recently been a spate of schools testing positive for lead contamination in drinking water across the country, at dangerously high levels. Since the Flint, Michigan water crisis brought lead contamination and lead poisoning into the spotlight in 2015, there has been a push to increase water testing in schools - and rightly so. It’s not likely that high test results are new; it is unfortunately instead likely that this has been an ongoing undetected problem. EPA estimates that 90,000 public schools, as well as half a million child care facilities, are not regulated under the Safe Drinking Water Act due to utilizing a municipal water utility. While these statistics are dated (2002), they are still referenced by EPA. Since the utility is the responsible party for testing water, the school itself is not required to test, unless there are more stringent local laws or they voluntarily choose to do so. Most do not, or if they do, their results may not be reflective of normal lead levels. Water frequently stagnates in school pipes, due to nights, weekends, and summers where water usage is drastically diminished. That stagnation leads to leaching of lead in the school's water, and therefore lead accumulation, when there are lead pipes or lead-containing valves and fittings.

It is important to note that there is no such thing as a safe level of lead in drinking water. It bears repeating: no level of lead is safe, especially when it comes to children, who are most sensitive to lead poisoning. The EPA limit of 15 parts per billion, set in 1991, is much higher than EPA and CDC have admitted is safe (they agree, there is no safe level of lead). In addition, 10% of samples are legally allowed to exceed the 15 ppb threshold without resulting in any utility violations. In contrast, The American Academy of Pediatrics proposes that lead in school drinking water should not exceed 1 ppb.

Lead Contamination In Nashville, Tennessee Schools

One city that recently made headlines for lead contamination in public schools is Nashville, Tennessee. Schools were tested for lead during the summer of 2017. Examples of frighteningly high lead levels are as follows (note, these are individual tap results):

• Park Avenue Elementary: 170 ppb
• Spectrum Academy: 349 ppb
• Chadwell Elementary: 272 ppb
• Cole Elementary: 106 ppb
• Neelys Bend Elementary: 115 ppb

In addition, 11 fountains exceeded 5 ppb of lead at McMurray Middle’s annex, and 13 fountains at Hattie Cotton Elementary had greater than 5 ppb. Haywood Elementary had very high lead averages, with 26 drinking fountains testing greater than 5 ppb of lead, 9 of which were over 15 ppb.

Metro Nashville Public Schools (MNPS) reported that any tap showing lead levels above 15 ppb was subsequently disconnected, but shutting off one tap does not solve the problem. Public schools are often old, and old schools tend to have an old infrastructure, which includes lead-based plumbing. While MNPS does not state the age of their school buildings, several of the schools also made headlines this winter for being unable to heat their classrooms during a prolonged cold spell, with classroom temperatures dipping down to a frigid 46°. This aging infrastructure is putting students at risk in multiple way. Regarding lead in drinking water, MNPS has remained in the news because of a leaked recording where Executive Director of Facilities Dennis Neal plotted with staff to bypass the filtration systems on several dozen lead-filtering “filtration stations” that were installed in some of the more affluent schools (courtesy of parent donations) following the lead scare. Neal was concerned about the high cost of continuously filtering water across schools with high lead levels, and stated “People keep wanting these bottle fillers, but they are adamant about them being filtered. I’m saying we cannot support it.”

After the recording was leaked, Neal was put on administrative leave while MNPS investigated; he has since resigned. Issues remain with lead levels in schools though, and parents have every right to be concerned. MNPS District Spokesperson Michelle Michaud, in an interview with CBS This Morning, stated that filters aren’t actually needed, because the school district has reduced lead levels to under 15 ppb, and then claimed that filters can reduce the amount of lead in water no further than that. "Those filters are doing a good thing," Michaud said. "They are making the water taste better, but they are not filtering out more lead." This is in contrast to the fact sheet from one of their filtration providers, which states that lead levels will be reduced to 10 ppb or less. Hydroviv filters, in comparison, have treated water with 200 ppb of lead, reducing the lead in water to an output of 0 ppb.

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Emma Schultz, M.S.

Many schools across the country have recently made the news for lead contamination in water, often at dangerously high levels. Since the Flint, Michigan water crisis brought lead contamination and lead poisoning into the spotlight in 2015, there has been a push to increase water testing in schools, for good reason. It’s unlikely that these high test results are new; it is much more likely that this has been an ongoing undetected problem. The U.S. Environmental Protection Agency (EPA) estimates that 90,000 public schools (as well as half a million child care facilities) are not regulated under the Safe Drinking Water Act due to utilizing a municipal water utility. While these statistics are dated (2002), they are still referenced by EPA. Since the utility is the responsible party for testing water, the school itself is not required to test, unless there are more stringent local laws or they voluntarily choose to do so. Most do not, or if they do, their results may not be reflective of normal lead levels. Water frequently stagnates in school pipes, due to nights, weekends, and summers where water usage is drastically diminished. That stagnation leads to leaching of lead, and therefore lead accumulation, when there are lead pipes or lead-containing valves and fittings. Many public schools across the country have an aging infrastructure, and with age comes the increased likelihood of lead-containing plumbing.

It is important to note that there is no such thing as a safe level of lead in drinking water. No level of lead is safe, especially when it comes to children, who are most sensitive to lead poisoning. The EPA limit of 15 parts per billion, set in 1991, is much higher than EPA and CDC have admitted is safe (they agree, there is no safe level of lead). In addition, 10% of samples are legally allowed to exceed the 15 ppb threshold without resulting in any utility violations. In contrast, The American Academy of Pediatrics proposes that lead in school drinking water should not exceed 1 ppb.

Lead Contamination In Montgomery County, Maryland Schools

Maryland’s governor, Larry Hogan, signed legislation in May 2017 mandating occasional testing of drinking water faucets in the state’s public and private schools. Montgomery County Public Schools (MCPS) began testing their 205 schools in February 2018, with an anticipated finish date of June 30th. Of their 205 facilities, drinking water test reports have been released so far for 21 schools.

While the nationwide Action Level for lead in municipal drinking water, as established by EPA, is 15 parts per billion, the Action Level for faucets in Maryland’s schools is set at 20 ppb. This is an amount agreed to by EPA and the Maryland Department of the Environment, and it is also the amount recommended under EPA’s voluntary guidance for schools utilizing their own water supply per the 1991 Lead and Copper Rule.

Of the 21 MCPS schools with released results, 12 have test results with lead levels higher than 20 ppb. Some of these violations come from faucets that students do not normally interact with, though several may be used during food preparation. Test results, broken down by school, are as follows:

While the remaining schools tested thus far are considered “safe” from high lead levels according to protocol, 19 of the 21 schools had test results above 10 ppb. For example, a water fountain in the Kindergarten area of Rosemont Elementary tested at 10.9 ppb, and a fountain in the music area of Washington Grove Elementary tested at 19.8 ppb.

Laytonsville Elementary, constructed in 1951 (and renovated in 1989, prior to the 1991 Lead and Copper Rule) had the following test results, which are perhaps most concerning of the schools technically considered to be “safe.” Several classroom faucets were found to have 15.7, 17.7, and 19.6 ppb of lead, while there were water fountains that tested at 13.9, 12.3, and 11.1 ppb. The average amount of lead across all Laytonsville Elementary faucets was over 5 ppb, while the average across all water fountains was 4.27 ppb. This suggests that the drinking water at Laytonsville Elementary may be more harmful to children than several of the schools that have made the news following the release of these test results. Also harmful to these children and their parents are news sources who have reported misleadingly on the story that “nine schools’ water tests did not show any elevated level of lead [including] Laytonsville E.S.” Once again, that there is no safe level of lead in drinking water, especially for children.

More test results should be released from MCPS soon.

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Why are so many schools testing positive for lead?
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Updated 5/17/2018 To Include Video

Cover image is screenshot of map taken from http://www.wnyc.org/story/wnyc-map-lead-contamination-water-fountains-nyc-public-schools/ taken at 23:59 on April 2.

Over the last several weeks and months, parents that send their children to New York City Public Schools have received letters notifying them that water from certain points of use in the schools (e.g. drinking fountains, hose bibs, faucets) have tested positive for high levels of lead. We recently wrote a more detailed article  that focuses specifically on why so many schools have such high levels of lead in their water.

Even though there is no safe level of lead for children, New York City is quick to point out that their tap water meets all federal standards, despite over 100 points of use in schools testing over 15 parts per billion, more than 30 having measurements over 400 parts per billion, and some measurements over 6500 parts per billion. This interactive map (updated regularly) shows the levels as the data are coming in.

While WNYC is doing a fantastic job assembling data, we encourage people to lean on Hydroviv's water quality experts for questions about water quality. Our water quality experts will answer your questions, even if you have no intention of buying a Hydroviv Water Filter. 

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