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EWG's Tap Water Database — 2021 UPDATE

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Perfluorooctanoic acid (PFOA)

Cal-water Service Company - Chico

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.

MORE ABOUT THIS CONTAMINANT

 

143

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND230ND
2014ND520ND
2015ND10ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
20191.21 ppt6719ND - 11.0 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 proposed 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 protects against cancer.

EPA Maximum Contaminant
Level (MCL) 4 ppt

ppt = parts per trillion

All test results

Date Lab ID Result
2013-07-08201307090266AMND
2013-07-10201307110726AMND
2013-07-10201307110717AMND
2013-07-23201307240452AMND
2013-07-24201307250296AMND
2013-08-05201308060207AMND
2013-08-05201308060172AMND
2013-08-07201308080295AMND
2013-08-14201308150417AMND
2013-08-14201308150374AMND
2013-08-14201308150517AMND
2013-08-20201308210543AMND
2013-08-20201308210529AMND
2013-08-21201308220194AMND
2013-08-21201308220226AMND
2013-08-27201308290351AMND
2013-09-17201309180768AMND
2013-09-17201309180758AMND
2013-09-18201309200060AMND
2013-10-08201310090469AMND
2013-10-08201310090666AMND
2013-10-08201310090478AMND
2013-10-15201310160274AMND
2014-01-07201401080519AMND
2014-01-07201401080500AMND
2014-01-08201401090453AMND
2014-01-14201401150421AMND
2014-01-21201401220304AMND
2014-01-22201401230436AMND
2014-01-28201401290597AMND
2014-02-11201402120763AMND
2014-02-11201402120781AMND
2014-02-11201402120772AMND
2014-02-12201402130425AMND
2014-02-12201402130416AMND
2014-02-12201402130406AMND
2014-02-19201402200381AMND
2014-02-26201402270251AMND
2014-02-26201402270200AMND
2014-02-28201403010103AMND
2014-03-04201403050605AMND
2014-03-04201403050446AMND
2014-03-04201403050467AMND
2014-03-05201403060272AMND
2014-03-17201403180361AMND
2014-03-17201403180310AMND
2014-03-18201403190840AMND
2014-03-18201403190855AMND
2014-04-08201404090694AMND
2014-04-09201404100737AMND
2014-04-09201404100814AMND
2014-04-09201404100715AMND
2014-04-09201404100765AMND
2014-04-22201404230619AMND
2014-04-22201404230454AMND
2014-04-23201404240399AMND
2014-04-23201404240506AMND
2014-06-18201406190419AMND
2014-07-09201407100536AMND
2014-07-14201407150439AMND
2014-08-05201408060340AMND
2014-08-05201408060374AMND
2014-08-06201408070482AMND
2014-09-09201409110343AMND
2014-09-09201409110322AMND
2014-09-10201409110684AMND
2014-09-10201409110778AMND
2014-09-23201409240607AMND
2014-09-24201409250614AMND
2014-10-07201410080533AMND
2014-10-07201410080452AMND
2014-10-08201410090317AMND
2014-10-15201410160405AMND
2014-10-27201410290064AMND
2014-12-09201412100748AMND
2015-01-13201501140881AMND
2019-05-299590-030-07547.00 ppt
2019-05-299590-052-1041ND
2019-05-299590-054-0840ND
2019-05-299590-057-0710ND
2019-05-299590-064-0948ND
2019-05-309590-034-1245ND
2019-05-309590-061-1052ND
2019-05-309590-069-1128ND
2019-05-309590-075-1159ND
2019-06-049590-018-0852ND
2019-06-049590-035-1035ND
2019-06-129590-033-1154ND
2019-06-129590-050-1219ND
2019-06-129590-140-1125ND
2019-06-139590-017-09253.50 ppt
2019-06-139590-026-0755ND
2019-06-139590-143-1215ND
2019-06-189590-027-0850ND
2019-06-189590-028-07503.30 ppt
2019-06-189590-077-0827ND
2019-06-189590-134-0810ND
2019-06-199590-013-05585.70 ppt
2019-06-199590-029-07533.50 ppt
2019-06-199590-036-08252.10 ppt
2019-06-199590-041-0800ND
2019-06-199590-074-0900ND
2019-07-029590-049-13003.40 ppt
2019-08-059590-063-10582.00 ppt
2019-08-279590-018-1120ND
2019-08-279590-023-0815ND
2019-08-279590-038-1322ND
2019-08-279590-057-1000ND
2019-08-279590-064-0815ND
2019-08-289590-010-09452.30 ppt
2019-08-289590-011-07303.90 ppt
2019-08-289590-020-0840ND
2019-08-289590-035-1020ND
2019-08-289590-043-1000ND
2019-08-289590-048-07317.00 ppt
2019-08-289590-061-0906ND
2019-08-299590-005-0900ND
2019-08-299590-037-0730ND
2019-08-299590-062-0715ND
2019-08-299590-076-0805ND
2019-09-112920-071-0705ND
2019-11-069590-010-08232.40 ppt
2019-11-069590-011-07004.00 ppt
2019-11-069590-018-0937ND
2019-11-069590-035-1232ND
2019-11-129590-005-10402.60 ppt
2019-11-129590-023-0837ND
2019-11-129590-038-1140ND
2019-11-129590-061-1015ND
2019-11-129590-064-0917ND
2019-11-129590-076-1110ND
2019-11-199590-037-0827ND
2019-11-199590-043-1015ND
2019-11-199590-048-075511.0 ppt
2019-11-199590-057-1059ND
2019-11-219590-020-0800ND
2019-11-219590-062-08302.00 ppt
2019-12-049590-049-0835ND
2019-12-049590-059-1020ND
2019-12-109590-017-11314.00 ppt
2019-12-119590-019-10146.40 ppt
2019-12-119590-028-09365.00 ppt
2019-12-179590-056-1130ND