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EWG's Tap Water Database — 2021 UPDATE

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Perfluorohexane sulfonate (PFHXS)

Derry Water Department

NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for perfluorohexane sulfonate (pfhxs). Sample information shown below was taken by Manchester Water Works.

Perfluorohexane sulfonate is a member of a group of perfluorinated chemicals used in many consumer products. Perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND30ND

ppt = parts per trillion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppt

The EWG Health Guideline of 1 ppt for perfluorohexane sulfonate was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline applies to the entire class of PFAS detected in water.

EPA Maximum Contaminant
Level (MCL) 10 ppt

ppt = parts per trillion

All test results

NOTE: Derry Water Department purchases water from Manchester Water Works which is required to test for perfluorohexane sulfonate (pfhxs). Sample information shown below was taken by Manchester Water Works.

Date Lab ID Result
2014-03-26201403270197AMND
2014-06-18201406190252AMND
2014-09-09201409100994AMND
2014-12-16201412170480AMND
2019-10-311910-04121-001ND
2019-10-311910-04121-002ND
2019-10-311910-04121-003ND