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EWG's Tap Water Database — 2021 UPDATE

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Heptachlor

Prescott Valley WD Upper

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

MORE ABOUT THIS CONTAMINANT

 

61

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND200ND
2017N/A00N/A
2018ND30ND
2019ND380ND

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
2016-02-09201602100057SND
2016-02-09201602100056SND
2016-02-09201602100055SND
2016-02-10201602110035SND
2016-02-10201602110034SND
2016-02-10201602110033SND
2016-02-10201602110032SND
2016-02-10201602110031SND
2016-02-10201602110030SND
2016-02-10201602110029SND
2016-08-03201608040050SND
2016-08-03201608040051SND
2016-08-03201608040052SND
2016-08-03201608040054SND
2016-08-03201608040053SND
2016-08-04201608050124SND
2016-08-04201608050123SND
2016-08-04201608050122SND
2016-08-04201608050121SND
2016-08-04201608050120SND
2018-05-09201805100262SND
2018-07-25201807250680SND
2018-10-11201810120161SND
2019-02-05201902060078SND
2019-02-05201902060085SND
2019-02-05201902060084SND
2019-02-05201902060083SND
2019-02-05201902060082SND
2019-02-05201902060081SND
2019-02-05201902060080SND
2019-02-05201902060079SND
2019-02-06201902070484SND
2019-02-06201902070483SND
2019-02-06201902070482SND
2019-02-06201902070481SND
2019-02-06201902070480SND
2019-02-06201902070479SND
2019-02-06201902070478SND
2019-02-06201902070477SND
2019-05-07201905080060SND
2019-05-07201905080058SND
2019-05-07201905080059SND
2019-05-07201905080061SND
2019-05-07201905080062SND
2019-05-07201905080064SND
2019-05-07201905080066SND
2019-05-07201905080067SND
2019-05-07201905080063SND
2019-05-08201905090396SND
2019-05-08201905090387SND
2019-05-08201905090394SND
2019-05-08201905090395SND
2019-05-08201905090397SND
2019-05-08201905090398SND
2019-05-08201905090399SND
2019-06-1919F2188-01ND
2019-08-2819H3349-01ND
2019-08-2819H3342-01ND
2019-09-1619I1769-05ND
2019-11-2019K2301-01ND
2019-11-2019K2302-01ND