Metro Schools' Lead Testing Program

In 2016, Metro Nashville Public Schools (MNPS) embarked on an ambitious, first-ever, voluntary water testing program in the wake of the lead crisis in Flint, MI and other areas of the country. We wanted to make sure water in our schools is safe for students and staff.

What began as a two-year, two-phase water quality testing program at MNPS, has now expanded into a dynamic and comprehensive water quality testing and remediation program encompassing installation of new water fixtures, replacement of water lines,  quarterly random water quality testing, monthly maintenance testing and flushing water lines after long breaks.

Here’s a look back at what we’ve accomplished since 2016.


Phase I

Summer 2016

Sampling and laboratory analysis of drinking water collected from 49 MNPS schools and administrative buildings identified by MNPS, prioritized based on relative ages of facilities (older) and ages of student bodies (younger).  Based on initial Phase I results, additional sampling and analysis was performed as part of Phase I, and MNPS implemented corrective measures addressing drinking water taps where elevated lead concentrations were reported.

Phase II

Summer/Fall 2017*

Sampling and laboratory analysis of drinking water collected from additional MNPS schools and administrative buildings also based on older age of facilities and younger ages of student bodies.

Phase III

July/early August 2017

Sampling and laboratory analysis of drinking water collected from 143 MNPS schools and administrative buildings. Based on results from previous phases of sampling and on initial Phase III results, additional sampling and analysis was performed and MNPS implemented corrective measures addressing drinking water taps where elevated concentrations were observed. 

Phase IV

Ongoing

Phase IV was initiated March 2018 and includes monthly sampling of water from taps that have previously shown concentrations of lead between 5 and 15 parts per billion (ppb) and annual maintenance sampling of select taps that have previously shown less than 5ppb. The objective of these programs is to help achieve a district-set goal of 5 ppb or less of lead in drinking water at MNPS facilities. It should be noted that U.S. Environmental Protection Agency (U.S .EPA) guidance indicates the current action level for schools is 20 ppb, which is considerably higher (less stringent) than the MNPS goal of 5 ppb. 


* Phase II plans were incorporated into the accelerated Phase III testing


As mentioned above, the monthly sampling program focuses on water from taps where lead levels tested at concentrations between 5 and 15 ppb during the previous Phase III sampling. An estimated 150 sampling locations out of 4,200 are in this range of lead concentrations based on previous results and many of those were only marginally above 5 ppb according to the lab analyzing the samples. This current program includes monthly collection and analysis of water samples over a one-year period.  Twenty-eight samples were recently collected as part of this program and lead concentrations in 20 of these samples were found to be less than 5 ppb.    

Annual maintenance sampling focuses on randomly selected taps where lead concentrations were less than 5 ppb during previous Phase III activities. Based on review of historical sampling activities, more than 4,000 sampling locations are in this range of lead concentrations.  

Annual maintenance sampling involves collection and analysis of water from approximately 10 percent of the taps where these concentrations were previously reported. Random generator software is being used to select the taps to be sampled at each of the schools.  Sixty-five samples were recently collected as part of this program, and lead concentrations in 63 of the 65 remained less than 5 ppb, considerably below the U.S. EPA action level of 20 ppb.

MNPS knows continued testing and remediation is the right thing to do to provide the best water quality possible in our schools, even though there are no federal, state or local requirements to test. We continue to work with Metro Water Services, Metro Public Health Department, the EPA, the Tennessee Department of Environment and Conservation and our outside expert, ENSAFE, in this work to develop and implement a process that meets all requirements for water quality sampling of public water systems.  Water in all MNPS schools tested is safe and meets all guidelines standards for public water systems. 

There is no federal law requiring testing of drinking water in schools and childcare facilities; however, EPA has developed a guidance manual to assist schools with lead in drinking water prevention programs. Click here to see the manual.

EPA Validates Metro Schools' LEad Testing Protocol

“In response to your inquiry, the attached memorandum refers to regulated public water systems (PWS). Schools are served by PWSs, but are not regulated under the Lead and Copper Rule, thus the attached memorandum does not apply. The 3 T’s guidance document contains recommendations for sampling and flushing of fixtures within schools and daycares." - EPA Region 4, Grants and Drinking Water Protection Branch, Drinking Water Section

Refer to the 3 T's guidance here.


Most Recent Tracking Spreadsheets

Past Tracking Spreadsheets

Date Random Sampling Routine Monthly Sampling
June 18, 2018 PDF PDF
May 17, 2018 PDF PDF
April 17, 2018 PDF PDF