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EWG's Tap Water Database — 2021 UPDATE

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Perfluorooctanoic acid (PFOA)

California Water Service (CWS) - Visalia

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

 

158

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND790ND
2015ND60ND
2016ND10ND
2017N/A00N/A
20187.10 ppt117.10 ppt
20190.585 ppt715ND - 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
2014-04-01A4C1081-09AND
2014-04-01A4C1081-01AND
2014-04-03A4C1081-13AND
2014-04-07A4C1253-05AND
2014-04-08A4C1253-01AND
2014-04-13A4C1476-13AND
2014-04-13A4C1476-01AND
2014-04-15A4C1476-09AND
2014-04-22A4C1796-05AND
2014-04-24A4C1796-01AND
2014-04-25A4C1796-09AND
2014-05-07A4C2018-01AND
2014-05-08A4C2018-05AND
2014-05-08A4C2018-21AND
2014-05-09A4C2018-25AND
2014-05-12A4D0061-17AND
2014-05-12A4D0061-05AND
2014-05-12A4D0061-13AND
2014-05-13A4D0061-01AND
2014-05-14A4D0061-09AND
2014-05-19A4D1188-05AND
2014-05-19A4D1188-13AND
2014-05-22A4D1188-09AND
2014-06-02A4D1544-01AND
2014-06-05A4D1544-09AND
2014-06-10A4E0756-01AND
2014-06-10A4E1527-05AND
2014-06-11A4E1527-01AND
2014-06-11A4E1527-03AND
2014-06-11A4F0325-01AND
2014-06-11A4D1544-13AND
2014-06-12A4E0756-05AND
2014-06-12A4E0756-13AND
2014-06-13A4E0756-09AND
2014-06-16A4E2267-01AND
2014-06-17A4E2264-01AND
2014-06-18A4E2262-01AND
2014-06-19A4E2265-01AND
2014-06-23A4F1344-01AND
2014-06-24A4F1344-05AND
2014-07-28A4G1966-01AND
2014-10-06A4I2143-01AND
2014-10-13A4J0085-01AND
2014-10-14A4J0086-01AND
2014-10-15A4J0088-01AND
2014-10-19A4J1139-01AND
2014-10-20A4J1142-01AND
2014-10-26A4J1756-01AND
2014-10-26A4J1758-01AND
2014-10-27A4J1140-01AND
2014-11-01A4J2319-01AND
2014-11-02A4J2327-01AND
2014-11-03A4J2325-01AND
2014-11-03A4J2329-01AND
2014-11-04A4J2323-01AND
2014-11-04A4J2321-01AND
2014-11-05A4J2330-01AND
2014-11-09A4J2695-01AND
2014-11-10A4J2697-01AND
2014-11-10A4J2699-01AND
2014-11-11A4J2692-01AND
2014-11-12A4J2693-01AND
2014-11-16A4K0480-01AND
2014-11-16A4K0484-01AND
2014-11-18A4K0485-01AND
2014-11-20A4K0483-01AND
2014-11-30A4K1839-01AND
2014-12-01A4K1842-01AND
2014-12-02A4K1841-01AND
2014-12-08A4K2207-01AND
2014-12-08A4K2083-01AND
2014-12-08A4K2085-01AND
2014-12-09A4K2214-01AND
2014-12-09A4K2212-01AND
2014-12-09A4K2208-01AND
2014-12-10A4K2211-01AND
2014-12-11A4K2209-01AND
2014-12-12A4K2210-01AND
2014-12-22A4L0701-01AND
2015-04-16201504170416AMND
2015-04-16201504170370AMND
2015-04-23201504240287AMND
2015-07-06201507070576AMND
2015-12-16201512170416AMND
2015-12-20201512230708AMND
2016-01-12201601130621AMND
2018-12-289590-087-09557.10 ppt
2019-06-285810-087-16259.40 ppt
2019-09-185810-087-111611.0 ppt
2019-11-155810-087-112010.00 ppt
2019-12-025810-026-1500ND
2019-12-025810-028-1430ND
2019-12-025810-040-1020ND
2019-12-025810-045-10353.30 ppt
2019-12-025810-065-0930ND
2019-12-025810-066-0935ND
2019-12-025810-092-1325ND
2019-12-025810-124-1030ND
2019-12-035810-027-1315ND
2019-12-035810-069-1420ND
2019-12-035810-094-1200ND
2019-12-035810-132-1320ND
2019-12-035810-147-1205ND
2019-12-045810-067-1345ND
2019-12-095810-015-0855ND
2019-12-095810-024-0925ND
2019-12-095810-036-0940ND
2019-12-095810-054-1020ND
2019-12-095810-058-1055ND
2019-12-095810-090-0805ND
2019-12-095810-179-1210ND
2019-12-105810-018-1132ND
2019-12-105810-030-1030ND
2019-12-105810-048-0953ND
2019-12-105810-056-1030ND
2019-12-105810-057-0845ND
2019-12-105810-081-1100ND
2019-12-105810-093-0825ND
2019-12-105810-118-0950ND
2019-12-115810-014-1224ND
2019-12-115810-029-0950ND
2019-12-115810-044-1630ND
2019-12-115810-055-0923ND
2019-12-115810-089-1245ND
2019-12-115810-142-1222ND
2019-12-115810-154-0915ND
2019-12-115810-155-0920ND
2019-12-115810-159-1124ND
2019-12-135810-010-0950ND
2019-12-135810-061-0915ND
2019-12-135810-098-0845ND
2019-12-145810-035-0825ND
2019-12-145810-064-1300ND
2019-12-165810-023-1520ND
2019-12-165810-046-1345ND
2019-12-165810-070-1612ND
2019-12-165810-136-1524ND
2019-12-165810-158-0945ND
2019-12-165810-178-1045ND
2019-12-175810-037-0935ND
2019-12-175810-047-1005ND
2019-12-175810-080-1500ND
2019-12-175810-119-1000ND
2019-12-175810-166-09157.80 ppt
2019-12-195810-003-1133ND
2019-12-195810-167-1520ND
2019-12-195810-182-1338ND
2019-12-195810-185-1455ND
2019-12-215810-049-1250ND
2019-12-215810-091-1245ND
2019-12-225810-031-1500ND
2019-12-225810-060-0840ND
2019-12-225810-128-1450ND
2019-12-265810-053-0855ND
2019-12-265810-059-0955ND
2019-12-265810-156-0815ND
2019-12-265810-161-0820ND
2019-12-305810-043-1020ND