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EWG's Tap Water Database — 2021 UPDATE

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Perfluorononanoic acid (PFNA)

Merrimack Village District

Perfluorononanoic acid, otherwise known as PFNA or C9, is a PFC similar in function and use to PFOA. These chemicals were used in the production of non-stick, stain repellent and chemically inert coatings. Click here to read more about perfluorinated chemicals.

 

340

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND70ND
2015ND10ND
20160.0520 ppt2173ND - 7.30 ppt
20170.0530 ppt171ND - 0.900 ppt
20180.453 ppt4433ND - 0.980 ppt
20190.488 ppt5439ND - 1.20 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 perfluorononanoic acid 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
2016-03-09K1602447-004ND
2016-03-09K1602447-002ND
2016-03-09K1602447-003ND
2016-03-09K1602447-001ND
2016-03-31K1603194-005ND
2016-03-31K1603194-001ND
2016-03-31K1603194-004ND
2016-03-31K1603194-002ND
2016-03-31K1603194-006ND
2016-03-31K1603194-003ND
2016-04-07K1603528-002ND
2016-04-07K1603528-003ND
2016-04-07K1603528-004ND
2016-04-07K1603528-001ND
2016-04-07K1603528-005ND
2016-04-14K1603866-003ND
2016-04-14K1603866-006ND
2016-04-14K1603866-002ND
2016-04-14K1603866-004ND
2016-04-14K1603866-005ND
2016-04-14K1603866-001ND
2016-04-21K1604106-005ND
2016-04-21K1604106-001ND
2016-04-21K1604106-004ND
2016-04-21K1604106-006ND
2016-04-21K1604106-003ND
2016-04-21K1604106-002ND
2016-04-28K1604467-005ND
2016-04-28K1604467-001ND
2016-04-28K1604467-002ND
2016-04-28K1604467-006ND
2016-04-28K1604467-003ND
2016-04-28K1604467-004ND
2016-05-05K1604775-004ND
2016-05-05K1604775-006ND
2016-05-05K1604775-001ND
2016-05-05K1604775-002ND
2016-05-05K1604775-003ND
2016-05-05K1604775-005ND
2016-05-12K1604985-001ND
2016-05-12K1604985-003ND
2016-05-12K1604985-004ND
2016-05-12K1604985-005ND
2016-05-12K1604985-006ND
2016-05-12K1604985-002ND
2016-05-191605251-04BND
2016-05-191605251-06ND
2016-05-191605251-03ND
2016-05-191605251-04ND
2016-05-191605251-02BND
2016-05-191605251-03BND
2016-05-191605251-02ND
2016-05-191605251-01ND
2016-05-191605251-05BND
2016-05-191605251-01BND
2016-05-191605251-05ND
2016-05-191605251-06BND
2016-05-261605393-01BND
2016-05-261605390-01ND
2016-05-261605392-01ND
2016-05-261605389-01BND
2016-05-261605391-01BND
2016-05-261605394-012.00 ppt
2016-05-261605392-01BND
2016-05-261605389-01ND
2016-05-261605390-01BND
2016-05-261605391-01ND
2016-05-261605393-01ND
2016-05-261605394-01B2.00 ppt
2016-06-021606075-01ND
2016-06-021606080-01ND
2016-06-021606079-01BND
2016-06-021606078-01ND
2016-06-021606076-01ND
2016-06-021606077-01ND
2016-06-021606075-01BND
2016-06-021606078-01BND
2016-06-021606079-01ND
2016-06-021606076-01BND
2016-06-021606077-01BND
2016-06-021606080-01BND
2016-06-091606179-01BND
2016-06-091606178-01ND
2016-06-091606177-01BND
2016-06-091606179-01ND
2016-06-091606178-01BND
2016-06-091606180-01ND
2016-06-091606177-01ND
2016-06-091606180-01BND
2016-06-161606252-01BND
2016-06-161606252-01ND
2016-06-161606252-02BND
2016-06-161606252-04BND
2016-06-161606252-04ND
2016-06-161606252-03BND
2016-06-161606252-02ND
2016-06-161606252-03ND
2016-06-231606352-01ND
2016-06-231606349-01ND
2016-06-231606350-01ND
2016-06-231606349-01BND
2016-06-231606351-01ND
2016-06-231606351-01BND
2016-06-231606352-01BND
2016-06-231606350-01BND
2016-06-301607019-01ND
2016-06-301607019-01BND
2016-06-301607022-01ND
2016-06-301607022-01BND
2016-06-30K1607569-002ND
2016-06-30K1607569-003ND
2016-06-301607020-01BND
2016-06-301607020-01ND
2016-06-301607021-01ND
2016-06-30K1607569-001ND
2016-06-301607021-01BND
2016-06-30K1607569-004ND
2016-07-071607089-01BND
2016-07-07K1607624-002ND
2016-07-07K1607624-005ND
2016-07-07K1607618-002ND
2016-07-07K1607618-003ND
2016-07-07K1607621-001ND
2016-07-07K1607621-003ND
2016-07-071607090-01ND
2016-07-071607090-01BND
2016-07-071607087-01BND
2016-07-071607091-01BND
2016-07-07K1607624-003ND
2016-07-071607091-01ND
2016-07-071607092-01BND
2016-07-07K1607624-004ND
2016-07-07K1607621-004ND
2016-07-071607088-01BND
2016-07-07K1607618-001ND
2016-07-07K1607618-004ND
2016-07-071607087-01ND
2016-07-071607088-01ND
2016-07-071607089-01ND
2016-07-071607086-01BND
2016-07-07K1607624-001ND
2016-07-07K1607624-006ND
2016-07-071607086-01ND
2016-07-071607092-01ND
2016-07-07K1607624-007ND
2016-07-141607212-01BND
2016-07-141607213-01ND
2016-07-141607215-01ND
2016-07-141607213-01BND
2016-07-141607215-01BND
2016-07-141607214-01BND
2016-07-141607212-01ND
2016-07-141607214-01ND
2016-07-211607277-01BND
2016-07-211607278-01BND
2016-07-211607278-01ND
2016-07-211607279-01BND
2016-07-211607276-01ND
2016-07-211607276-01BND
2016-07-211607277-01ND
2016-07-211607279-01ND
2016-07-281607344-01BND
2016-07-281607344-01ND
2016-07-281607345-01ND
2016-07-281607346-01ND
2016-07-281607343-01BND
2016-07-281607346-01BND
2016-07-281607343-01ND
2016-07-281607345-01BND
2016-08-041608075-02BND
2016-08-041608075-01BND
2016-08-041608075-04BND
2016-08-041608075-03BND
2016-08-18K1609928-003ND
2016-08-18K1609928-004ND
2016-08-18K1609928-001ND
2016-08-18K1609928-002ND
2016-09-01K1610468-001ND
2016-09-01K1610468-002ND
2016-09-01K1610468-003ND
2016-09-07K1610695-001ND
2016-09-15K1611036-003ND
2016-09-15K1611036-001ND
2016-09-15K1611036-002ND
2016-09-15K1611036-004ND
2016-09-29K1611858-0047.30 ppt
2016-09-29K1611858-002ND
2016-09-29K1611858-003ND
2016-09-29K1611858-001ND
2016-10-13K1612679-003ND
2016-10-13K1612679-002ND
2016-10-13K1612679-004ND
2016-10-13K1612679-001ND
2016-10-27K1613253-002ND
2016-10-27K1613253-003ND
2016-10-27K1613253-004ND
2016-10-27K1613253-001ND
2016-11-10K1613978-002ND
2016-11-10K1613978-001ND
2016-11-10K1613978-003ND
2016-11-10K1613978-004ND
2016-11-16K1614222-001ND
2016-11-16K1614222-004ND
2016-11-16K1614222-002ND
2016-11-16K1614222-003ND
2016-12-01K1614633-001ND
2016-12-01K1614633-003ND
2016-12-01K1614633-002ND
2016-12-01K1614633-004ND
2016-12-15K1615281-004ND
2016-12-15K1615281-001ND
2016-12-15K1615281-003ND
2016-12-15K1615281-002ND
2016-12-28K1615500-004ND
2016-12-28K1615500-001ND
2016-12-28K1615500-003ND
2016-12-28K1615500-002ND
2017-01-12K1700420-001ND
2017-01-12K1700420-002ND
2017-01-12K1700420-004ND
2017-01-12K1700420-003ND
2017-01-26K1700898-003ND
2017-01-26K1700898-002ND
2017-01-26K1700898-004ND
2017-01-26K1700898-001ND
2017-02-09K1701387-002ND
2017-02-09K1701387-004ND
2017-02-09K1701387-003ND
2017-02-09K1701387-001ND
2017-03-098888465ND
2017-03-0988884640.900 ppt
2017-05-10AB67121ND
2017-05-10AB67111ND
2017-05-10AB67112ND
2018-02-1594635960.500 ppt
2018-02-159463598ND
2018-02-159463595ND
2018-02-1594635970.700 ppt
2018-03-2295207930.800 ppt
2018-03-229520791ND
2018-03-229520794ND
2018-03-2295207920.500 ppt
2018-04-199569128ND
2018-04-1995691290.430 ppt
2018-04-199569131ND
2018-04-1995691300.560 ppt
2018-05-299633894ND
2018-05-299633891ND
2018-05-2996338920.570 ppt
2018-05-2996338930.820 ppt
2018-06-2196744000.800 ppt
2018-06-2196744020.380 ppt
2018-06-2196743990.500 ppt
2018-06-2196744010.670 ppt
2018-07-1997143480.390 ppt
2018-07-199714345ND
2018-07-1997143460.680 ppt
2018-07-1997143470.640 ppt
2018-08-2397711690.980 ppt
2018-08-2397711710.490 ppt
2018-08-2397711680.480 ppt
2018-08-2397711700.920 ppt
2018-09-1998124730.910 ppt
2018-09-1998124710.500 ppt
2018-09-1998124720.760 ppt
2018-09-199812474ND
2018-10-2598703390.440 ppt
2018-10-2598703410.690 ppt
2018-10-2598703400.600 ppt
2018-10-2598703420.410 ppt
2018-11-2099097470.570 ppt
2018-11-2099097460.360 ppt
2018-11-209909749ND
2018-11-2099097480.580 ppt
2018-12-2099528480.410 ppt
2018-12-2099528450.540 ppt
2018-12-2099528460.660 ppt
2018-12-2099528470.680 ppt
2019-01-179970058ND
2019-01-1799700560.610 ppt
2019-01-1799700570.610 ppt
2019-01-1799700550.360 ppt
2019-02-279995195ND
2019-02-2799951930.660 ppt
2019-02-2799951940.700 ppt
2019-02-279995192ND
2019-03-211015516ND
2019-03-2110155180.710 ppt
2019-03-2110155170.640 ppt
2019-03-2110155190.360 ppt
2019-04-181039206ND
2019-04-1810392040.650 ppt
2019-04-1810392050.640 ppt
2019-04-181039203ND
2019-05-2310661790.680 ppt
2019-05-2310661780.820 ppt
2019-05-231066180ND
2019-05-231066177ND
2019-06-1410819240.380 ppt
2019-06-141081921ND
2019-06-1410819220.940 ppt
2019-06-1410819230.710 ppt
2019-07-2511120561.20 ppt
2019-07-251112055ND
2019-07-251112058ND
2019-07-2511120570.680 ppt
2019-08-2911417640.430 ppt
2019-08-2911417610.460 ppt
2019-08-2911417620.800 ppt
2019-08-2911417630.590 ppt
2019-09-2611631040.650 ppt
2019-09-2611631050.860 ppt
2019-09-2611631060.750 ppt
2019-09-261163107ND
2019-10-2211831180.680 ppt
2019-10-221183119ND
2019-10-2211831200.920 ppt
2019-10-2211831210.580 ppt
2019-10-2211831220.510 ppt
2019-11-2112103560.540 ppt
2019-11-2112103570.920 ppt
2019-11-2112103580.650 ppt
2019-11-211210359ND
2019-11-2112103600.480 ppt
2019-12-0412158630.880 ppt
2019-12-0412158640.600 ppt
2019-12-0412158650.520 ppt
2019-12-1912284610.700 ppt
2019-12-1912284621.20 ppt
2019-12-1912284630.780 ppt
2019-12-191228464ND
2019-12-1912284650.520 ppt