Heptachlor

Rochester

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

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	32	ND
2015	N/A	0	N/A
2016	ND	43	ND
2017	ND	5	ND
2018	ND	14	ND
2019	N/A	0	N/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
2014-05-19	14E2396-02	ND
2014-05-19	14E2396-03	ND
2014-05-19	14E2400-03	ND
2014-05-19	14E2406-01	ND
2014-05-19	14E2406-02	ND
2014-05-19	14E2419-02	ND
2014-05-19	14E2394-01	ND
2014-06-02	14F0254-01	ND
2014-06-02	14F0261-02	ND
2014-06-02	14F0261-01	ND
2014-06-02	14F0260-01	ND
2014-06-02	14F0256-01	ND
2014-06-02	14F0243-02	ND
2014-06-02	14F0243-01	ND
2014-09-15	14I0882-01	ND
2014-09-15	14I0887-01	ND
2014-09-15	14I0885-01	ND
2014-09-15	14I0883-01	ND
2014-09-16	14I0880-03	ND
2014-09-16	14I0879-01	ND
2014-09-16	14I0880-01	ND
2014-09-16	14I0884-01	ND
2014-09-16	14I0879-03	ND
2014-09-16	14I0886-01	ND
2014-09-16	14I0886-02	ND
2014-09-16	14I0886-03	ND
2014-09-16	14I0879-02	ND
2014-09-16	14I0880-02	ND
2014-11-20	14K0986-02	ND
2014-11-20	14K0987-04	ND
2014-11-20	14K0987-02	ND
2014-11-20	14K0986-01	ND
2016-04-04	3424552	ND
2016-04-04	3424538	ND
2016-04-04	3424519	ND
2016-04-04	3424507	ND
2016-04-04	3424495	ND
2016-04-04	3424484	ND
2016-04-04	3424473	ND
2016-04-04	3424461	ND
2016-04-04	3424435	ND
2016-04-04	3424445	ND
2016-04-05	3425186	ND
2016-04-05	3425262	ND
2016-04-05	3425248	ND
2016-04-05	3425221	ND
2016-04-05	3425212	ND
2016-04-05	3425202	ND
2016-04-05	3425194	ND
2016-04-05	3425177	ND
2016-04-05	3425169	ND
2016-04-05	3425161	ND
2016-04-13	3430433	ND
2016-04-13	3430449	ND
2016-07-19	3497119	ND
2016-07-19	3497043	ND
2016-07-19	3497100	ND
2016-07-19	3497106	ND
2016-07-19	3497126	ND
2016-07-19	3497132	ND
2016-07-19	3497013	ND
2016-07-19	3497001	ND
2016-07-19	3496980	ND
2016-07-19	3496987	ND
2016-07-25	3502878	ND
2016-07-25	3502905	ND
2016-07-25	3502873	ND
2016-07-25	3502868	ND
2016-07-25	3502829	ND
2016-07-25	3502083	ND
2016-07-25	3502078	ND
2016-07-25	3502073	ND
2016-07-25	3502037	ND
2016-07-25	3502061	ND
2016-12-27	16L0919-01	ND
2017-03-09	17C0558-02	ND
2017-06-19	17F1297-01	ND
2017-09-26	17I1233-02	ND
2017-09-26	17I1233-01	ND
2017-09-26	17I1225-01	ND
2018-03-29	18C1134-01	ND
2018-06-19	18F1339-02	ND
2018-06-19	18F1351-02	ND
2018-06-19	18F1348-04	ND
2018-06-19	18F1348-02	ND
2018-06-19	18F1334-03	ND
2018-06-19	18F1334-02	ND
2018-09-25	18I1339-01	ND
2018-09-25	18I1339-02	ND
2018-09-25	18I1339-03	ND
2018-09-25	18I1341-02	ND
2018-09-25	18I1341-03	ND
2018-09-25	18I1341-04	ND
2018-12-27	18L0843-02	ND