Know Your Environment. Protect Your Health.

Heptachlor epoxide

Arizona Water Company - Sierra Vista

Heptachlor epoxide is a breakdown product of heptachlor, a highly toxic and carcinogenic pesticide banned in the U.S. since the 1980s.

 

29

Samples

1

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND140ND
2019N/A00N/A
2020N/A00N/A
20210.0289 ppb152ND - 0.350 ppb
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.006 ppb

The EWG Health Guideline of 0.006 ppb for heptachlor epoxide 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): 0.2 ppb

The legal limit for heptachlor epoxide, 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.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-23201801240105SND
2018-01-23201801240106SND
2018-01-23201801240107SND
2018-01-23201801240108SND
2018-01-23201801240109SND
2018-01-23201801240110SND
2018-01-23201801240104SND
2018-07-25201807250636SND
2018-07-25201807250647SND
2018-07-25201807250646SND
2018-07-25201807250645SND
2018-07-25201807250644SND
2018-07-25201807250643SND
2018-07-25201807250635SND
2021-05-2021E2311-01 SOCND
2021-05-2021E2311-07SOCND
2021-05-2021E2311-06SOCND
2021-05-2021E2311-05SOCND
2021-05-2021E2311-03 SOCND
2021-05-2021E2311-02 SOCND
2021-11-1621K2237-010.350 ppb
2021-11-1621K2237-02ND
2021-11-1621K2237-030.0840 ppb
2021-11-1721K2431-01ND
2021-11-1721K2431-02ND
2021-11-1721K2431-03ND
2021-11-1721K2431-04ND
2021-12-0821L1169-01ND
2021-12-2221L2776-01ND