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EWG's Tap Water Database — 2019 UPDATE

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Perchlorate

Naval Station, Newport

NOTE: Naval Station, Newport purchases water from City of Newport which is required to test for perchlorate. Sample information shown below was taken by City of Newport.

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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013ND40ND
2014ND10ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A

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

NOTE: Naval Station, Newport purchases water from City of Newport which is required to test for perchlorate. Sample information shown below was taken by City of Newport.

Date Lab ID Result
2013-04-241301163-09_WL52ND
2013-04-241301163-05_WL52ND
2013-04-241301163-03_WL52ND
2013-04-241301163-04_WL52ND
2013-04-241301163-02_WL52ND
2013-04-241301163-06_WL52ND
2013-04-241301163-08_WL52ND
2013-04-241301163-07_WL52ND
2013-04-241301163-01_WL52ND
2013-04-241301163-10_WL52ND
2013-10-311304024-03_WL52ND
2013-10-311304024-04_WL52ND
2013-10-311304024-02_WL52ND
2013-10-311304024-06_WL52ND
2013-10-311304024-08_WL52ND
2013-10-311304024-07_WL52ND
2013-10-311304024-01_WL52ND
2013-10-311304024-10_WL52ND
2013-10-311304024-09_WL52ND
2013-10-311304024-05_WL52ND
2013-12-111304437-09_WL52ND
2013-12-111304437-05_WL52ND
2013-12-111304437-03_WL52ND
2013-12-111304437-04_WL52ND
2013-12-111304437-02_WL52ND
2013-12-111304437-06_WL52ND
2013-12-111304437-08_WL52ND
2013-12-111304437-07_WL52ND
2013-12-111304437-01_WL52ND
2013-12-111304437-10_WL52ND
2014-03-191401905-03_WL52ND
2014-03-191401905-04_WL52ND
2014-03-191401905-02_WL52ND
2014-03-191401905-06_WL52ND
2014-03-191401905-08_WL52ND
2014-03-191401905-07_WL52ND
2014-03-191401905-01_WL52ND
2014-03-191401905-10_WL52ND
2014-03-191401905-09_WL52ND
2014-03-191401905-05_WL52ND