Know Your Environment. Protect Your Health.

Methoxychlor

Regional Water Authority

Methoxychlor is an endocrine-disrupting, neurotoxic insecticide similar to DDT. Banned in the U.S. in 2002, methoxychlor was historically used on farm animals and in animal feed, lumber, gardens and agricultural crops.

 

78

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND260ND
2020ND40ND
2021ND40ND
2022ND360ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.09 ppb

The EWG Health Guideline of 0.09 ppb for methoxychlor 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 hormone disruption.

EPA Maximum Contaminant
Level (MCL): 40 ppb

The legal limit for methoxychlor, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-05SOCR 200489130ND
2018-03-05SOCR 200489131ND
2018-03-05SOCR 200489152ND
2018-11-29SOCR 200514127ND
2019-03-04SOCR 200523153ND
2019-03-04SOCR 200523178ND
2019-03-04SOCR 200523152ND
2019-03-04SOCR 200523177ND
2019-05-08SOC 200531300ND
2019-05-28SOC 200533720ND
2019-05-28SOC 200533719ND
2019-05-28SOC 200533803ND
2019-05-28SOC 200533804ND
2019-05-28SOC 200533660ND
2019-05-28SOC 200533659ND
2019-05-29SOC 200533881ND
2019-05-29SOC 200533880ND
2019-05-29SOC 200533867ND
2019-05-29SOC 200533868ND
2019-08-26SOC 200546200ND
2019-08-26SOC 200546197ND
2019-08-26SOC 200546198ND
2019-08-27SOC 200546267ND
2019-08-27SOC 200546268ND
2019-08-27SOC 200546302ND
2019-08-27SOC 200546303ND
2019-08-28SOC 200546738ND
2019-08-28SOC 200546737ND
2019-08-28SOC 200546736ND
2019-08-28SOC 200546553ND
2020-03-02SOCR 200567667ND
2020-03-02SOCR 200567641ND
2020-03-02SOCR 200567666ND
2020-03-02SOCR 200567642ND
2021-03-08SOCR 200608803ND
2021-03-08SOCR 200608888ND
2021-03-08SOCR 200608887ND
2021-03-09SOCR 200608923ND
2022-03-07H300153409 300153414ND
2022-03-07H300153416 300153417ND
2022-03-07H300153331 300153332ND
2022-03-07H300153334 300153335ND
2022-07-11S300210822 300210824ND
2022-07-11S300210156 300210158ND
2022-07-11S300210164 300210166ND
2022-07-11S300210651 300210653ND
2022-07-11S300210659 300210661ND
2022-07-12S300211086 300211088ND
2022-07-12S300211068 300211070ND
2022-07-12S300211076 300211078ND
2022-07-13S300212413 300212415ND
2022-07-13S300212421 300212423ND
2022-07-14S300212957 300212959ND
2022-10-17S300258850 300258852ND
2022-10-17300258850 300258852BND
2022-10-17300258858 300258860BND
2022-10-17S300258858 300258860ND
2022-10-18S300258921 300258923ND
2022-10-18300258921 300258923BND
2022-10-18300259350 300259352BND
2022-10-18300259358 300259360BND
2022-10-18S300259350 300259352ND
2022-10-18300258913 300258915BND
2022-10-18S300258913 300258915ND
2022-10-18S300259358 300259360ND
2022-10-19S300260499 300260501ND
2022-10-19S300260507 300260509ND
2022-10-19300260507 300260509BND
2022-10-19300260499 300260501BND
2022-10-19S300259940 300259942ND
2022-10-19300259940 300259942BND
2022-10-19300259930 300259934BND
2022-10-19S300259930 300259934ND
2022-12-06S300281400 300281402ND
2023-04-10H300330392 300330393ND
2023-04-10H300329920 300329921ND
2023-04-10H300330395 300330396ND
2023-04-10H300329917 300329918ND