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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Oyster Bay Water District

Heptachlor is an insecticide used for termite control until 1988. It is linked to cancer, hormone disruption and neurotoxicity.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013N/A00N/A
2014ND50ND
2015ND50ND
2016ND50ND
2017ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.008 ppb

The EWG Health Guideline of 0.008 ppb for heptachlor 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 cancer.

EPA Maximum Contaminant
Level (MCL) 0.4 ppb

The legal limit for heptachlor, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to heptachlor exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-12-191212988-001-SOCSND
2012-12-191212988-002-SOCSND
2012-12-191212988-004-SOCSND
2012-12-191212988-003-SOCSND
2012-12-211212B33-001-SOCSND
2014-06-041406268-001-SOCSND
2014-06-041406268-003-SOCSND
2014-06-041406268-002-SOCSND
2014-06-041406268-004-SOCSND
2014-06-041406268-005-SOCSND
2015-05-201505E61-001-SOCSND
2015-05-201505E61-004-SOCSND
2015-05-201505E61-005-SOCSND
2015-05-201505E61-002-SOCSND
2015-05-201505E61-003-SOCSND
2016-06-281606Q85-001-SOCSND
2016-06-281606Q85-002-SOCSND
2016-06-281606Q85-003-SOCSND
2016-06-281606Q85-004-SOCSND
2016-06-291606S10-001-SOCSND
2017-06-277022481004ND
2017-06-277022481001ND
2017-06-277022481005ND
2017-06-277022481002ND
2017-06-277022481003ND