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EWG's Tap Water Database — 2021 UPDATE

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Perchlorate

Camp Pendleton (South)

Perchlorate, a component of rocket fuel, occurs both naturally and as a synthetic chemical. Ingested perchlorate interferes with thyroid function. Exposure to perchlorate during pregnancy and childhood can impair cognitive development. Read More.

According to the EPA, perchlorate likely contaminates the water of more than 16 million Americans. Perchlorate interferes with iodine uptake in the thyroid, which can result in reduced thyroid hormones and an impact on metabolism, physical development and cognitive development. Children and developing fetuses are the most at risk from perchlorate contamination.

Perchlorate is the only unregulated contaminant for which the EPA has attempted to set a federal drinking water standard since 1996. However, the agency has yet to propose a draft limit for this contaminant. Perchlorate in drinking water is regulated in Arizona, California, Massachusetts, New Jersey, New York and Texas. California set a public health goal of 1 part per billion for perchlorate in 2015.

Click here to read more about perchlorate.

MORE ABOUT THIS CONTAMINANT

 

150

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND260ND
2015ND270ND
2016ND210ND
2017ND230ND
2018ND280ND
2019ND250ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 1 ppb

The EWG Health Guideline of 1 ppb for perchlorate was defined by the 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 hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-279590-039-1100ND
2014-01-299590-032-1115ND
2014-01-309590-037-1115ND
2014-02-139590-030-1115ND
2014-03-139590-043-1045ND
2014-03-139590-044-1126ND
2014-04-239590-009-0944ND
2014-04-239590-034-1115ND
2014-04-249590-022-1115ND
2014-04-259590-014-1150ND
2014-04-259590-036-1115ND
2014-04-289590-035-1210ND
2014-05-219590-030-1015ND
2014-05-219590-039-1050ND
2014-05-239590-049-1030ND
2014-06-119590-043-1140ND
2014-06-129590-044-1220ND
2014-06-249590-037-1100ND
2014-07-099590-049-1030ND
2014-07-149590-039-1120ND
2014-07-179590-030-1140ND
2014-08-219590-043-1155ND
2014-10-289590-030-1115ND
2014-11-059590-044-1245ND
2014-11-069590-049-1155ND
2014-11-209590-039-1255ND
2015-01-169590-030-1035ND
2015-01-219590-049-1315ND
2015-01-269590-039-1210ND
2015-01-269590-044-1136ND
2015-03-139590-043-1336ND
2015-03-139590-044-1310ND
2015-03-169590-020-1220ND
2015-03-169590-037-1250ND
2015-03-189590-019-1050ND
2015-03-189590-034-1242ND
2015-03-199590-018-0800ND
2015-03-249590-022-1105ND
2015-04-019590-036-1025ND
2015-04-099590-014-0945ND
2015-05-119590-039-1145ND
2015-05-129590-049-1135ND
2015-05-209590-030-1000ND
2015-05-209590-044-1035ND
2015-07-249590-030-1020ND
2015-07-279590-039-1300ND
2015-08-139590-035-1046ND
2015-08-249590-049-1145ND
2015-08-249590-051-1230ND
2015-10-149590-039-1230ND
2015-10-149590-049-1120ND
2015-10-159590-030-1215ND
2015-11-169590-051-1030ND
2016-01-139590-049-1230ND
2016-02-059590-039-1115ND
2016-02-199590-030-1050ND
2016-04-219590-034-1236ND
2016-04-219590-035-1205ND
2016-04-269590-022-1105ND
2016-04-269590-037-1220ND
2016-04-279590-019-1248ND
2016-04-289590-043-1145ND
2016-04-289590-044-1102ND
2016-04-299590-014-1130ND
2016-04-299590-036-1048ND
2016-05-039590-030-1200ND
2016-05-059590-039-1115ND
2016-05-059590-051-1045ND
2016-05-129590-020-1130ND
2016-08-039590-039-1200ND
2016-08-089590-030-1130ND
2016-10-279590-044-1120ND
2016-11-019590-030-1115ND
2016-11-219590-039-1325ND
2017-01-099590-030-1140ND
2017-02-159590-039-1120ND
2017-03-079590-036-1110ND
2017-03-089590-014-1105ND
2017-03-099590-020-1115ND
2017-03-099590-035-1150ND
2017-03-099590-051-1230ND
2017-03-179590-019-1146ND
2017-03-179590-034-1240ND
2017-03-179590-037-1115ND
2017-03-239590-022-1250ND
2017-03-309590-043-1135ND
2017-03-309590-044-1115ND
2017-05-109590-039-1215ND
2017-05-119590-030-1245ND
2017-07-139590-030-1300ND
2017-07-219590-049-1310ND
2017-07-249590-039-1030ND
2017-11-019590-039-1200ND
2017-11-179590-032-1045ND
2017-12-049590-030-1245ND
2017-12-209590-018-0722ND
2017-12-289590-049-1110ND
2018-01-099590-032-1320ND
2018-01-259590-039-1120ND
2018-02-059590-030-1315ND
2018-02-089590-014-1235ND
2018-02-129590-036-1335ND
2018-02-129590-049-1110ND
2018-02-149590-018-0740ND
2018-03-149590-051-1242ND
2018-03-159590-020-1130ND
2018-03-159590-035-1200ND
2018-03-219590-034-1245ND
2018-03-229590-043-1125ND
2018-03-229590-044-1020ND
2018-03-269590-022-1340ND
2018-03-299590-019-1225ND
2018-03-299590-037-1302ND
2018-04-249590-039-1220ND
2018-04-259590-030-1300ND
2018-05-019590-049-1300ND
2018-05-169590-032-1230ND
2018-07-239590-039-1145ND
2018-07-259590-030-1152ND
2018-07-279590-032-0822ND
2018-07-279590-049-0930ND
2018-11-069590-030-1245ND
2018-11-139590-032-1245ND
2018-11-139590-049-1230ND
2018-11-199590-039-1100ND
2019-01-099590-030-1230ND
2019-01-239590-039-1200ND
2019-01-289590-032-0945ND
2019-01-289590-049-1040ND
2019-01-309590-020-1052ND
2019-01-319590-034-1100ND
2019-02-219590-014-1320ND
2019-02-289590-051-1042ND
2019-03-019590-035-1102ND
2019-03-159590-043-1035ND
2019-03-159590-044-1120ND
2019-03-219590-019-1136ND
2019-03-219590-037-1100ND
2019-05-079590-032-0835ND
2019-05-079590-049-1025ND
2019-05-089590-039-1215ND
2019-05-099590-030-1100ND
2019-07-249590-039-1200ND
2019-07-309590-032-0730ND
2019-07-309590-049-0830ND
2019-09-199590-030-0638ND
2019-10-309590-030-1045ND
2019-11-129590-039-1220ND
2019-11-149590-032-0710ND
2019-11-149590-049-0810ND