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New maps show where wells were contaminated in Somerset County

PHOTO COURTESY OF RARITAN HEADWATERS ASSOCIATION
Raritan Headwaters Association has published interactive maps of water quality data from wells tests throughout the watershed.

The nonprofit Raritan Headwaters Association (RHA) is making it easier to find out what is in drinking water.

Four out of five households (80%) in the upper Raritan River watershed in Hunterdon, Somerset and Morris counties get drinking water from a private well on their property, according to information provided by RHA.

The only way for well owners to know if their water is safe and healthy is by testing it.

Since 1974, RHA has offered well testing at discounted rates through a certified laboratory. But it’s up to homeowners to choose exactly which substances to test for.

RHA has published interactive maps of water quality data from wells tests throughout the watershed, serving as a useful tool for residents considering testing options. By exploring test results in their immediate vicinity, residents are empowered to make more informed decisions around monitoring the health of their drinking water, according to the statement.

“Our goal is to educate residents about common well water pollutants and make testing easy so that everyone in our watershed has access to safe drinking water,” RHA Well Testing Manager Mara Tippett said in the statement.

The data generated through RHA’s Community Well Testing program are used to assess the quality of the water from residential wells throughout the watershed.

“We took 10 years of test results – from 2011 through 2020 – and mapped all the data points,” Tippett said in the statement. “Using our new maps, local residents can see what contaminants are most common in their neighborhoods, learn about sources and prevention, and get guidance on testing frequency.”

Common well water contaminants include coliform bacteria, nitrates, arsenic, gross alpha (naturally-occurring uranium and radium), radon, and volatile organic compounds. Lead is another potential drinking water contaminant in homes built before 1986, where it can lurk in pipes, solder or plumbing fixtures.

The new RHA maps – available at www.raritanheadwaters.org/well-water-map/ – divide the 470-square-mile watershed into a grid of one-square-mile areas. Each hexagon-shaped cell is color-coded to show what level of contamination was detected in well tests. A separate map was created for each common contaminant.

“It’s easy for people to zoom into their towns and neighborhoods and see what a decade’s worth of well test results have found,” Melissa Thomas, RHA’s director of Geographic Information Systems mapping, said in the statement. “For example, if the map shows that wells within a mile of your home have high levels of arsenic or volatile organic compounds, you’ll probably also want to test for those.”

The grid mapping system was chosen, Thomas noted, to protect the privacy of homeowners who have had their wells tested through RHA. Exact locations of wells that have been tested are not shown.

To test your well, you may either participate in an upcoming Community Well Testing event, in which local municipalities offer pickup and dropoff points for testing kits, or order a water sampling kit online for pickup at Raritan Headwaters offices in Bedminster or Flemington.

Following the instructions on the kits, collect samples of tap water and bring the samples back to RHA.

Test results will be emailed in about two weeks.

If contamination is found, the RHA well testing department can provide resources on water treatment options, such as filter systems for the home.

“Approximately 1,600 local households utilize our well test program each year to determine their drinking water quality,” Tippett said in the statement. “Testing every year is vital to ensuring a safe and secure water supply because conditions can change over time. Changes in water quality and potability may occur due to extreme weather events, structural condition of the well, or impact from nearby septic systems.”

For more information on well testing, visit www.raritanheadwaters.org/get-involved-2/groundwater-well-testing/ or email WellTesting@raritanheadwaters.org.

To find an upcoming Community Well Testing event, visit www.testmywell.org.

To learn more about Raritan Headwaters and its programs, visit www.raritanheadwaters.org or call 908-234-1852.

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