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EWG's Tap Water Database — 2021 UPDATE

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Perfluoroheptanoic acid (PFHPA)

City of Orange

Perfluoroheptanoic acid 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.

MORE ABOUT THIS CONTAMINANT

 

59

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND120ND
20140.460 ppt251ND - 11.5 ppt
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
20194.21 ppt2217ND - 7.90 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 perfluoroheptanoic 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
2013-03-043010027826ND
2013-03-053010027827ND
2013-03-063010027824ND
2013-06-103010027827-2ND
2013-06-103010027826-2ND
2013-06-113010027824-2ND
2013-09-033010027827-3ND
2013-09-033010027826-3ND
2013-09-113010027824-3AND
2013-12-093010027826-4ND
2013-12-093010027827-4ND
2013-12-093010027824-4ND
2014-05-133010027804-1ND
2014-05-133010027805-1ND
2014-05-133010027816-1ND
2014-05-133010027803-1ND
2014-05-133010027817-1ND
2014-05-143010027808-1ND
2014-05-143010027806-1ND
2014-05-143010027812-1ND
2014-05-143010027825-1ND
2014-05-143010027813-1ND
2014-05-143010027802-1ND
2014-05-143010027809-111.5 ppt
2014-10-1314100371ND
2014-10-1314100370ND
2014-10-1314100374ND
2014-10-1314100375ND
2014-10-1314100373ND
2014-10-1314100376ND
2014-10-1314100372ND
2014-10-1414100429ND
2014-10-1414100428ND
2014-10-1414100430ND
2014-10-1414100431ND
2014-10-1414100426ND
2014-10-1414100427ND
2019-04-234417-008-12154.50 ppt
2019-04-234417-009-12305.00 ppt
2019-04-234417-017-11454.10 ppt
2019-04-234417-023-1045ND
2019-06-044417-008-10454.20 ppt
2019-06-044417-017-1125ND
2019-06-044417-022-10154.70 ppt
2019-06-044417-023-1200ND
2019-06-044417-009-11054.70 ppt
2019-06-054417-020-11107.30 ppt
2019-09-034417-020-10207.90 ppt
2019-09-034417-008-11555.50 ppt
2019-09-034417-023-1050ND
2019-09-034417-009-12105.70 ppt
2019-09-034417-017-12405.10 ppt
2019-09-194417-022-11305.90 ppt
2019-11-054417-022-09055.50 ppt
2019-11-054417-008-12355.40 ppt
2019-11-054417-009-12206.00 ppt
2019-11-054417-017-12055.00 ppt
2019-11-054417-020-10106.20 ppt
2019-11-054417-023-1115ND