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EWG's Tap Water Database — 2021 UPDATE

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Perfluorohexane sulfonate (PFHXS)

Merrimack Village District

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.

 

340

Samples

0

Samples exceeding legal limit (MCL)

61

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND10ND
20160.347 ppt21711ND - 32.0 ppt
20170.118 ppt172ND - 1.000 ppt
20181.08 ppt44440.560 ppt - 2.60 ppt
20191.06 ppt54540.490 ppt - 1.60 ppt

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.

ppt = parts per trillion

All test results

Date Lab ID Result
2014-04-1435134213003AMND
2014-04-1435134213001AMND
2014-04-2235135015001AMND
2014-07-1435146449001AMND
2014-10-0735158589005AMND
2014-10-0735158589001AMND
2014-10-0735158589003AMND
2015-06-1535193367001AMND
2016-03-09K1602447-003ND
2016-03-09K1602447-001ND
2016-03-09K1602447-002ND
2016-03-09K1602447-004ND
2016-03-31K1603194-001ND
2016-03-31K1603194-006ND
2016-03-31K1603194-003ND
2016-03-31K1603194-004ND
2016-03-31K1603194-005ND
2016-03-31K1603194-002ND
2016-04-07K1603528-005ND
2016-04-07K1603528-001ND
2016-04-07K1603528-003ND
2016-04-07K1603528-002ND
2016-04-07K1603528-004ND
2016-04-14K1603866-001ND
2016-04-14K1603866-004ND
2016-04-14K1603866-002ND
2016-04-14K1603866-005ND
2016-04-14K1603866-006ND
2016-04-14K1603866-0034.70 ppt
2016-04-21K1604106-002ND
2016-04-21K1604106-005ND
2016-04-21K1604106-003ND
2016-04-21K1604106-0068.20 ppt
2016-04-21K1604106-001ND
2016-04-21K1604106-004ND
2016-04-28K1604467-004ND
2016-04-28K1604467-001ND
2016-04-28K1604467-002ND
2016-04-28K1604467-003ND
2016-04-28K1604467-006ND
2016-04-28K1604467-005ND
2016-05-05K1604775-002ND
2016-05-05K1604775-001ND
2016-05-05K1604775-004ND
2016-05-05K1604775-005ND
2016-05-05K1604775-0036.80 ppt
2016-05-05K1604775-006ND
2016-05-12K1604985-003ND
2016-05-12K1604985-002ND
2016-05-12K1604985-005ND
2016-05-12K1604985-004ND
2016-05-12K1604985-001ND
2016-05-12K1604985-006ND
2016-05-191605251-01ND
2016-05-191605251-05BND
2016-05-191605251-05ND
2016-05-191605251-03BND
2016-05-191605251-04BND
2016-05-191605251-02BND
2016-05-191605251-06ND
2016-05-191605251-02ND
2016-05-191605251-01BND
2016-05-191605251-06BND
2016-05-191605251-03ND
2016-05-191605251-04ND
2016-05-261605392-01ND
2016-05-261605393-01ND
2016-05-261605394-01B3.00 ppt
2016-05-261605391-013.00 ppt
2016-05-261605394-013.00 ppt
2016-05-261605390-01ND
2016-05-261605391-01B3.00 ppt
2016-05-261605389-01BND
2016-05-261605389-01ND
2016-05-261605392-01BND
2016-05-261605390-01BND
2016-05-261605393-01BND
2016-06-021606075-01BND
2016-06-021606076-01ND
2016-06-021606078-01ND
2016-06-021606079-01ND
2016-06-021606077-01BND
2016-06-021606078-01BND
2016-06-021606080-01ND
2016-06-021606079-01BND
2016-06-021606080-01BND
2016-06-021606076-01BND
2016-06-021606075-01ND
2016-06-021606077-01ND
2016-06-091606177-01BND
2016-06-091606179-01BND
2016-06-091606178-01ND
2016-06-091606180-01ND
2016-06-091606177-01ND
2016-06-091606178-01BND
2016-06-091606179-01ND
2016-06-091606180-01BND
2016-06-161606252-02ND
2016-06-161606252-03ND
2016-06-161606252-02BND
2016-06-161606252-04BND
2016-06-161606252-01ND
2016-06-161606252-01BND
2016-06-161606252-03BND
2016-06-161606252-04ND
2016-06-231606351-01ND
2016-06-231606349-01BND
2016-06-231606352-01BND
2016-06-231606349-01ND
2016-06-231606350-01ND
2016-06-231606350-01BND
2016-06-231606352-01ND
2016-06-231606351-01BND
2016-06-301607022-01ND
2016-06-301607020-01BND
2016-06-301607019-01ND
2016-06-301607021-01BND
2016-06-30K1607569-002ND
2016-06-301607021-01ND
2016-06-30K1607569-003ND
2016-06-301607019-01BND
2016-06-301607022-01BND
2016-06-30K1607569-001ND
2016-06-301607020-01ND
2016-06-30K1607569-004ND
2016-07-071607087-01ND
2016-07-071607090-01ND
2016-07-071607088-01B3.00 ppt
2016-07-07K1607618-004ND
2016-07-07K1607621-003ND
2016-07-071607092-01ND
2016-07-071607092-01BND
2016-07-07K1607621-004ND
2016-07-07K1607624-003ND
2016-07-07K1607624-006ND
2016-07-07K1607618-001ND
2016-07-07K1607618-003ND
2016-07-071607091-01BND
2016-07-07K1607624-004ND
2016-07-07K1607624-007ND
2016-07-071607086-01ND
2016-07-071607087-01BND
2016-07-071607089-01BND
2016-07-07K1607624-001ND
2016-07-07K1607624-005ND
2016-07-07K1607621-001ND
2016-07-071607091-01ND
2016-07-071607090-01BND
2016-07-07K1607624-002ND
2016-07-071607088-013.00 ppt
2016-07-071607089-01ND
2016-07-071607086-01BND
2016-07-07K1607618-002ND
2016-07-141607215-01BND
2016-07-141607214-01ND
2016-07-141607212-01ND
2016-07-141607212-01BND
2016-07-141607214-01BND
2016-07-141607213-01ND
2016-07-141607213-01BND
2016-07-141607215-01ND
2016-07-211607277-01BND
2016-07-211607277-01ND
2016-07-211607278-01ND
2016-07-211607279-01ND
2016-07-211607276-01ND
2016-07-211607276-01BND
2016-07-211607278-01BND
2016-07-211607279-01BND
2016-07-281607344-01ND
2016-07-281607343-01ND
2016-07-281607345-01ND
2016-07-281607343-01BND
2016-07-281607344-01BND
2016-07-281607345-01BND
2016-07-281607346-01BND
2016-07-281607346-01ND
2016-08-041608075-03BND
2016-08-041608075-01BND
2016-08-041608075-02BND
2016-08-041608075-04BND
2016-08-18K1609928-001ND
2016-08-18K1609928-003ND
2016-08-18K1609928-002ND
2016-08-18K1609928-004ND
2016-09-01K1610468-003ND
2016-09-01K1610468-002ND
2016-09-01K1610468-001ND
2016-09-07K1610695-001ND
2016-09-15K1611036-004ND
2016-09-15K1611036-001ND
2016-09-15K1611036-002ND
2016-09-15K1611036-00332.0 ppt
2016-09-29K1611858-004ND
2016-09-29K1611858-002ND
2016-09-29K1611858-001ND
2016-09-29K1611858-003ND
2016-10-13K1612679-001ND
2016-10-13K1612679-003ND
2016-10-13K1612679-002ND
2016-10-13K1612679-004ND
2016-10-27K1613253-002ND
2016-10-27K1613253-004ND
2016-10-27K1613253-0015.50 ppt
2016-10-27K1613253-003ND
2016-11-10K1613978-002ND
2016-11-10K1613978-001ND
2016-11-10K1613978-003ND
2016-11-10K1613978-004ND
2016-11-16K1614222-002ND
2016-11-16K1614222-004ND
2016-11-16K1614222-003ND
2016-11-16K1614222-001ND
2016-12-01K1614633-001ND
2016-12-01K1614633-002ND
2016-12-01K1614633-003ND
2016-12-01K1614633-004ND
2016-12-15K1615281-001ND
2016-12-15K1615281-004ND
2016-12-15K1615281-003ND
2016-12-15K1615281-002ND
2016-12-28K1615500-004ND
2016-12-28K1615500-003ND
2016-12-28K1615500-001ND
2016-12-28K1615500-002ND
2017-01-12K1700420-002ND
2017-01-12K1700420-003ND
2017-01-12K1700420-001ND
2017-01-12K1700420-004ND
2017-01-26K1700898-001ND
2017-01-26K1700898-004ND
2017-01-26K1700898-002ND
2017-01-26K1700898-003ND
2017-02-09K1701387-001ND
2017-02-09K1701387-003ND
2017-02-09K1701387-004ND
2017-02-09K1701387-002ND
2017-03-0988884641.000 ppt
2017-03-0988884651.000 ppt
2017-05-10AB67112ND
2017-05-10AB67111ND
2017-05-10AB67121ND
2018-02-1594635971.000 ppt
2018-02-1594635950.600 ppt
2018-02-1594635981.000 ppt
2018-02-1594635960.700 ppt
2018-03-2295207920.600 ppt
2018-03-2295207941.000 ppt
2018-03-2295207910.800 ppt
2018-03-2295207932.00 ppt
2018-04-1995691311.20 ppt
2018-04-1995691290.600 ppt
2018-04-1995691280.960 ppt
2018-04-1995691301.40 ppt
2018-05-2996338931.60 ppt
2018-05-2996338920.870 ppt
2018-05-2996338910.890 ppt
2018-05-2996338941.30 ppt
2018-06-2196744021.20 ppt
2018-06-2196743990.860 ppt
2018-06-2196744000.720 ppt
2018-06-2196744011.50 ppt
2018-07-1997143471.30 ppt
2018-07-1997143481.10 ppt
2018-07-1997143460.720 ppt
2018-07-1997143450.620 ppt
2018-08-2397711681.10 ppt
2018-08-2397711690.810 ppt
2018-08-2397711701.90 ppt
2018-08-2397711711.50 ppt
2018-09-1998124731.80 ppt
2018-09-1998124720.640 ppt
2018-09-1998124711.000 ppt
2018-09-1998124742.60 ppt
2018-10-2598703411.50 ppt
2018-10-2598703421.10 ppt
2018-10-2598703390.830 ppt
2018-10-2598703400.560 ppt
2018-11-2099097460.690 ppt
2018-11-2099097470.690 ppt
2018-11-2099097490.960 ppt
2018-11-2099097481.10 ppt
2018-12-2099528460.730 ppt
2018-12-2099528450.670 ppt
2018-12-2099528471.40 ppt
2018-12-2099528481.20 ppt
2019-01-1799700560.520 ppt
2019-01-1799700581.10 ppt
2019-01-1799700571.40 ppt
2019-01-1799700550.630 ppt
2019-02-2799951941.20 ppt
2019-02-2799951951.10 ppt
2019-02-2799951931.30 ppt
2019-02-2799951920.640 ppt
2019-03-2110155191.10 ppt
2019-03-2110155160.650 ppt
2019-03-2110155170.490 ppt
2019-03-2110155181.20 ppt
2019-04-1810392051.60 ppt
2019-04-1810392061.20 ppt
2019-04-1810392040.600 ppt
2019-04-1810392030.840 ppt
2019-05-2310661791.40 ppt
2019-05-2310661780.630 ppt
2019-05-2310661801.20 ppt
2019-05-2310661770.820 ppt
2019-06-1410819220.780 ppt
2019-06-1410819210.820 ppt
2019-06-1410819231.40 ppt
2019-06-1410819241.30 ppt
2019-07-2511120560.780 ppt
2019-07-2511120551.30 ppt
2019-07-2511120581.40 ppt
2019-07-2511120571.50 ppt
2019-08-2911417611.30 ppt
2019-08-2911417641.10 ppt
2019-08-2911417631.50 ppt
2019-08-2911417620.670 ppt
2019-09-2611631051.20 ppt
2019-09-2611631041.10 ppt
2019-09-2611631071.20 ppt
2019-09-2611631061.50 ppt
2019-10-2211831181.30 ppt
2019-10-2211831191.000 ppt
2019-10-2211831200.630 ppt
2019-10-2211831211.000 ppt
2019-10-2211831221.10 ppt
2019-11-2112103560.910 ppt
2019-11-2112103570.820 ppt
2019-11-2112103581.40 ppt
2019-11-2112103591.000 ppt
2019-11-2112103601.20 ppt
2019-12-0412158630.730 ppt
2019-12-0412158640.980 ppt
2019-12-0412158651.20 ppt
2019-12-1912284610.890 ppt
2019-12-1912284620.880 ppt
2019-12-1912284631.20 ppt
2019-12-1912284641.20 ppt
2019-12-1912284651.20 ppt