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EWG's Tap Water Database — 2019 UPDATE

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Heptachlor

Town of Princess Anne

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013N/A00N/A
2014N/A00N/A
2015ND20ND
2016ND100ND
2017N/A00N/A

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
2012-09-110190002_07_00126ND
2012-09-110190002_08_00126ND
2015-09-22E16001238001ND
2015-12-28L5979291_1_BND
2016-03-30E16003648004ND
2016-03-30E16003648002ND
2016-08-05E17000501005ND
2016-08-05E17000501002ND
2016-10-19E17001766001ND
2016-12-21L6605660_3_AND
2016-12-21L6605660_2_AND
2016-12-21L6605660_1_AND
2016-12-21L6605660_4_AND
2016-12-29L6609497ND