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EWG's Tap Water Database — 2021 UPDATE

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Perfluorooctanoic acid (PFOA)

Merrimack Village District

Perfluorooctanoic acid (PFOA) is a member of a group of perfluorinated chemicals used in many consumer products. PFOA and other 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.

 

338

Samples

0

Samples exceeding legal limit (MCL)

331

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20147.00 ppt61ND - 42.0 ppt
2015N/A00N/A
201625.1 ppt217215ND - 130.0 ppt
201719.9 ppt171712.0 ppt - 30.0 ppt
201817.9 ppt44447.10 ppt - 28.0 ppt
201919.5 ppt54547.50 ppt - 30.0 ppt

ppt = parts per trillion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.007 ppt

The EWG Health Guideline of 0.007 ppt for PFOA was defined by California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline cancer.

ppt = parts per trillion

All test results

Date Lab ID Result
2014-04-1435134213003AMND
2014-04-1435134213001AM42.0 ppt
2014-04-2235135015001AMND
2014-10-0735158589005AMND
2014-10-0735158589001AMND
2014-10-0735158589003AMND
2016-03-09K1602447-00290.0 ppt
2016-03-09K1602447-00117.0 ppt
2016-03-09K1602447-00452.0 ppt
2016-03-09K1602447-00354.0 ppt
2016-03-31K1603194-00126.0 ppt
2016-03-31K1603194-00356.0 ppt
2016-03-31K1603194-00490.0 ppt
2016-03-31K1603194-0028.50 ppt
2016-03-31K1603194-00527.0 ppt
2016-03-31K1603194-0069.70 ppt
2016-04-07K1603528-00394.0 ppt
2016-04-07K1603528-00452.0 ppt
2016-04-07K1603528-00528.0 ppt
2016-04-07K1603528-00128.0 ppt
2016-04-07K1603528-0028.60 ppt
2016-04-14K1603866-00131.0 ppt
2016-04-14K1603866-00232.0 ppt
2016-04-14K1603866-00467.0 ppt
2016-04-14K1603866-00530.0 ppt
2016-04-14K1603866-00394.0 ppt
2016-04-14K1603866-00610.00 ppt
2016-04-21K1604106-00226.0 ppt
2016-04-21K1604106-00126.0 ppt
2016-04-21K1604106-00525.0 ppt
2016-04-21K1604106-0069.90 ppt
2016-04-21K1604106-00456.0 ppt
2016-04-21K1604106-00393.0 ppt
2016-04-28K1604467-00124.0 ppt
2016-04-28K1604467-00385.0 ppt
2016-04-28K1604467-0069.20 ppt
2016-04-28K1604467-00225.0 ppt
2016-04-28K1604467-00521.0 ppt
2016-04-28K1604467-00457.0 ppt
2016-05-05K1604775-00245.0 ppt
2016-05-05K1604775-00527.0 ppt
2016-05-05K1604775-003130.0 ppt
2016-05-05K1604775-00466.0 ppt
2016-05-05K1604775-0069.60 ppt
2016-05-05K1604775-00133.0 ppt
2016-05-12K1604985-00118.0 ppt
2016-05-12K1604985-00479.0 ppt
2016-05-12K1604985-00229.0 ppt
2016-05-12K1604985-00375.0 ppt
2016-05-12K1604985-00525.0 ppt
2016-05-12K1604985-00613.0 ppt
2016-05-191605251-058.00 ppt
2016-05-191605251-02B20.0 ppt
2016-05-191605251-0441.0 ppt
2016-05-191605251-04B48.0 ppt
2016-05-191605251-03B12.0 ppt
2016-05-191605251-0311.0 ppt
2016-05-191605251-0219.0 ppt
2016-05-191605251-0115.0 ppt
2016-05-191605251-06B17.0 ppt
2016-05-191605251-0617.0 ppt
2016-05-191605251-05B8.00 ppt
2016-05-191605251-01B16.0 ppt
2016-05-261605391-01B42.0 ppt
2016-05-261605389-0113.0 ppt
2016-05-261605391-0135.0 ppt
2016-05-261605394-01B10.00 ppt
2016-05-261605389-01B15.0 ppt
2016-05-261605393-01B14.0 ppt
2016-05-261605394-018.00 ppt
2016-05-261605390-01B39.0 ppt
2016-05-261605390-0134.0 ppt
2016-05-261605392-0113.0 ppt
2016-05-261605393-0112.0 ppt
2016-05-261605392-01B15.0 ppt
2016-06-021606080-01B6.00 ppt
2016-06-021606076-0125.0 ppt
2016-06-021606077-01B26.0 ppt
2016-06-021606076-01B25.0 ppt
2016-06-021606078-01B9.00 ppt
2016-06-021606080-015.00 ppt
2016-06-021606077-0121.0 ppt
2016-06-021606079-016.00 ppt
2016-06-021606075-01B14.0 ppt
2016-06-021606079-01B7.00 ppt
2016-06-021606075-0114.0 ppt
2016-06-021606078-018.00 ppt
2016-06-091606177-01B14.0 ppt
2016-06-091606179-01B7.00 ppt
2016-06-091606180-016.00 ppt
2016-06-091606179-016.00 ppt
2016-06-091606178-019.00 ppt
2016-06-091606178-01B10.00 ppt
2016-06-091606180-01B7.00 ppt
2016-06-091606177-0112.0 ppt
2016-06-161606252-02B16.0 ppt
2016-06-161606252-01B18.0 ppt
2016-06-161606252-03B12.0 ppt
2016-06-161606252-0310.00 ppt
2016-06-161606252-0214.0 ppt
2016-06-161606252-04B10.00 ppt
2016-06-161606252-0117.0 ppt
2016-06-161606252-049.00 ppt
2016-06-231606349-01B14.0 ppt
2016-06-231606349-0113.0 ppt
2016-06-231606350-01B15.0 ppt
2016-06-231606350-0113.0 ppt
2016-06-231606352-019.00 ppt
2016-06-231606352-01B10.00 ppt
2016-06-231606351-019.00 ppt
2016-06-231606351-01B10.00 ppt
2016-06-301607022-019.00 ppt
2016-06-301607021-01B6.00 ppt
2016-06-301607019-01B10.00 ppt
2016-06-301607022-01B9.00 ppt
2016-06-30K1607569-00127.0 ppt
2016-06-301607019-0110.00 ppt
2016-06-301607020-0113.0 ppt
2016-06-30K1607569-00418.0 ppt
2016-06-301607020-01B13.0 ppt
2016-06-30K1607569-00226.0 ppt
2016-06-301607021-016.00 ppt
2016-06-30K1607569-00314.0 ppt
2016-07-071607092-0114.0 ppt
2016-07-071607091-01B21.0 ppt
2016-07-07K1607624-00577.9 ppt
2016-07-07K1607621-00324.0 ppt
2016-07-07K1607621-00417.0 ppt
2016-07-07K1607624-007ND
2016-07-07K1607618-00113.0 ppt
2016-07-07K1607618-00221.0 ppt
2016-07-07K1607624-00449.3 ppt
2016-07-071607088-0161.0 ppt
2016-07-071607091-0119.0 ppt
2016-07-071607089-01B68.0 ppt
2016-07-07K1607624-00322.3 ppt
2016-07-07K1607624-00625.2 ppt
2016-07-07K1607618-00494.0 ppt
2016-07-071607090-0137.0 ppt
2016-07-071607090-01B42.0 ppt
2016-07-07K1607624-001ND
2016-07-07K1607621-00153.0 ppt
2016-07-071607089-0159.0 ppt
2016-07-071607087-01B17.0 ppt
2016-07-071607088-01B69.0 ppt
2016-07-07K1607624-00291.7 ppt
2016-07-07K1607618-00385.0 ppt
2016-07-071607086-0110.00 ppt
2016-07-071607087-0115.0 ppt
2016-07-071607086-01B11.0 ppt
2016-07-071607092-01B15.0 ppt
2016-07-141607214-01B11.0 ppt
2016-07-141607212-0114.0 ppt
2016-07-141607215-0113.0 ppt
2016-07-141607213-01B20.0 ppt
2016-07-141607213-0118.0 ppt
2016-07-141607212-01B16.0 ppt
2016-07-141607215-01B14.0 ppt
2016-07-141607214-019.00 ppt
2016-07-211607276-01B14.0 ppt
2016-07-211607277-01B21.0 ppt
2016-07-211607279-01B13.0 ppt
2016-07-211607278-018.00 ppt
2016-07-211607278-01B10.00 ppt
2016-07-211607279-0112.0 ppt
2016-07-211607276-0113.0 ppt
2016-07-211607277-0119.0 ppt
2016-07-281607346-01B17.0 ppt
2016-07-281607343-0116.0 ppt
2016-07-281607344-01B26.0 ppt
2016-07-281607345-01B11.0 ppt
2016-07-281607344-0124.0 ppt
2016-07-281607346-0115.0 ppt
2016-07-281607345-0110.00 ppt
2016-07-281607343-01B16.0 ppt
2016-08-041608075-03B9.00 ppt
2016-08-041608075-01B14.0 ppt
2016-08-041608075-04B16.0 ppt
2016-08-041608075-02B23.0 ppt
2016-08-18K1609928-00118.0 ppt
2016-08-18K1609928-00232.0 ppt
2016-08-18K1609928-00314.0 ppt
2016-08-18K1609928-00421.0 ppt
2016-09-01K1610468-00318.0 ppt
2016-09-01K1610468-00212.0 ppt
2016-09-01K1610468-00130.0 ppt
2016-09-07K1610695-00119.0 ppt
2016-09-15K1611036-00117.0 ppt
2016-09-15K1611036-00233.0 ppt
2016-09-15K1611036-00422.0 ppt
2016-09-15K1611036-00323.0 ppt
2016-09-29K1611858-00234.0 ppt
2016-09-29K1611858-00119.0 ppt
2016-09-29K1611858-00314.0 ppt
2016-09-29K1611858-00423.0 ppt
2016-10-13K1612679-00122.0 ppt
2016-10-13K1612679-00232.0 ppt
2016-10-13K1612679-00313.0 ppt
2016-10-13K1612679-00421.0 ppt
2016-10-27K1613253-00125.0 ppt
2016-10-27K1613253-00429.0 ppt
2016-10-27K1613253-00236.0 ppt
2016-10-27K1613253-00312.0 ppt
2016-11-10K1613978-00122.0 ppt
2016-11-10K1613978-00232.0 ppt
2016-11-10K1613978-00313.0 ppt
2016-11-10K1613978-00420.0 ppt
2016-11-16K1614222-00238.0 ppt
2016-11-16K1614222-00422.0 ppt
2016-11-16K1614222-00123.0 ppt
2016-11-16K1614222-00315.0 ppt
2016-12-01K1614633-00232.0 ppt
2016-12-01K1614633-00122.0 ppt
2016-12-01K1614633-00313.0 ppt
2016-12-01K1614633-00423.0 ppt
2016-12-15K1615281-00432.0 ppt
2016-12-15K1615281-00121.0 ppt
2016-12-15K1615281-00221.0 ppt
2016-12-15K1615281-00311.0 ppt
2016-12-28K1615500-00129.0 ppt
2016-12-28K1615500-00425.0 ppt
2016-12-28K1615500-00237.0 ppt
2016-12-28K1615500-00317.0 ppt
2017-01-12K1700420-00125.0 ppt
2017-01-12K1700420-00419.0 ppt
2017-01-12K1700420-00214.0 ppt
2017-01-12K1700420-00315.0 ppt
2017-01-26K1700898-00125.0 ppt
2017-01-26K1700898-00228.0 ppt
2017-01-26K1700898-00314.0 ppt
2017-01-26K1700898-00418.0 ppt
2017-02-09K1701387-00312.0 ppt
2017-02-09K1701387-00416.0 ppt
2017-02-09K1701387-00230.0 ppt
2017-02-09K1701387-00126.0 ppt
2017-03-09888846422.0 ppt
2017-03-09888846516.0 ppt
2017-05-10AB6711123.0 ppt
2017-05-10AB6711214.0 ppt
2017-05-10AB6712122.0 ppt
2018-02-1594635958.00 ppt
2018-02-15946359816.0 ppt
2018-02-15946359614.0 ppt
2018-02-15946359722.0 ppt
2018-03-22952079323.0 ppt
2018-03-22952079212.0 ppt
2018-03-22952079418.0 ppt
2018-03-2295207918.00 ppt
2018-04-19956912913.0 ppt
2018-04-19956913019.0 ppt
2018-04-19956913116.0 ppt
2018-04-1995691287.10 ppt
2018-05-29963389223.0 ppt
2018-05-2996338919.80 ppt
2018-05-29963389420.0 ppt
2018-05-29963389328.0 ppt
2018-06-21967440218.0 ppt
2018-06-21967440020.0 ppt
2018-06-21967440121.0 ppt
2018-06-21967439913.0 ppt
2018-07-19971434618.0 ppt
2018-07-19971434818.0 ppt
2018-07-1997143458.20 ppt
2018-07-19971434720.0 ppt
2018-08-23977117026.0 ppt
2018-08-23977116814.0 ppt
2018-08-23977116924.0 ppt
2018-08-23977117122.0 ppt
2018-09-19981247423.0 ppt
2018-09-19981247327.0 ppt
2018-09-19981247117.0 ppt
2018-09-19981247219.0 ppt
2018-10-25987033916.0 ppt
2018-10-25987034022.0 ppt
2018-10-25987034122.0 ppt
2018-10-25987034217.0 ppt
2018-11-20990974612.0 ppt
2018-11-20990974725.0 ppt
2018-11-20990974916.0 ppt
2018-11-20990974819.0 ppt
2018-12-20995284816.0 ppt
2018-12-20995284720.0 ppt
2018-12-20995284512.0 ppt
2018-12-20995284627.0 ppt
2019-01-17997005719.0 ppt
2019-01-17997005815.0 ppt
2019-01-1799700559.30 ppt
2019-01-17997005625.0 ppt
2019-02-27999519419.0 ppt
2019-02-27999519322.0 ppt
2019-02-27999519515.0 ppt
2019-02-2799951928.40 ppt
2019-03-21101551819.0 ppt
2019-03-21101551918.0 ppt
2019-03-2110155167.50 ppt
2019-03-21101551721.0 ppt
2019-04-18103920423.0 ppt
2019-04-18103920522.0 ppt
2019-04-18103920618.0 ppt
2019-04-1810392039.90 ppt
2019-05-2310661779.80 ppt
2019-05-23106618017.0 ppt
2019-05-23106617921.0 ppt
2019-05-23106617827.0 ppt
2019-06-14108192230.0 ppt
2019-06-1410819219.90 ppt
2019-06-14108192323.0 ppt
2019-06-14108192419.0 ppt
2019-07-25111205623.0 ppt
2019-07-25111205723.0 ppt
2019-07-25111205819.0 ppt
2019-07-25111205518.0 ppt
2019-08-29114176123.0 ppt
2019-08-29114176219.0 ppt
2019-08-29114176418.0 ppt
2019-08-29114176321.0 ppt
2019-09-26116310521.0 ppt
2019-09-26116310719.0 ppt
2019-09-26116310625.0 ppt
2019-09-26116310424.0 ppt
2019-10-22118311822.0 ppt
2019-10-22118311918.0 ppt
2019-10-22118312024.0 ppt
2019-10-22118312121.0 ppt
2019-10-22118312221.0 ppt
2019-11-21121035619.0 ppt
2019-11-21121035725.0 ppt
2019-11-21121035824.0 ppt
2019-11-21121035918.0 ppt
2019-11-21121036021.0 ppt
2019-12-04121586321.0 ppt
2019-12-04121586417.0 ppt
2019-12-04121586518.0 ppt
2019-12-19122846118.0 ppt
2019-12-19122846225.0 ppt
2019-12-19122846322.0 ppt
2019-12-19122846418.0 ppt
2019-12-19122846522.0 ppt