Know Your Environment. Protect Your Health.

Perchlorate

Fcwwd #41/shaver Lake

Perchlorate, a component of rocket fuel, occurs both naturally and as a synthetic chemical. Ingested perchlorate interferes with thyroid function. Exposure to perchlorate during pregnancy and childhood can impair cognitive development. Read More.

According to the EPA, perchlorate likely contaminates the water of more than 16 million Americans. Perchlorate interferes with iodine uptake in the thyroid, which can result in reduced thyroid hormones and an impact on metabolism, physical development and cognitive development. Children and developing fetuses are the most at risk from perchlorate contamination.

Perchlorate is the only unregulated contaminant for which the EPA has attempted to set a federal drinking water standard since 1996. However, the agency has yet to propose a draft limit for this contaminant. Perchlorate in drinking water is regulated in Arizona, California, Massachusetts, New Jersey, New York and Texas. California set a public health goal of 1 part per billion for perchlorate in 2015.

Click here to read more about perchlorate.

 

70

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND170ND
2019ND140ND
2020ND30ND
2021ND200ND
2022ND130ND
2023ND30ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 1 ppb

The EWG Health Guideline of 1 ppb for perchlorate 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.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-12CA1010017_005_005-201803121119ND
2018-03-12CA1010017_008_008-201803121200ND
2018-03-12CA1010017_033_033-201803121239ND
2018-03-12CA1010017_001_001-201803121055ND
2018-03-12CA1010017_015_015-201803121341ND
2018-03-12CA1010017_014_014-201803121310ND
2018-03-14CA1010017_034_034-201803140320ND
2018-03-14CA1010017_062_062-201803141234ND
2018-03-16CA1010017_036_036-201803161304ND
2018-03-16CA1010017_012_012-201803161225ND
2018-03-16CA1010017_011_011-201803161212ND
2018-03-16CA1010017_035_035-201803161334ND
2018-03-16CA1010017_006_006-201803161041ND
2018-03-19CA1010017_002_002-201803190815ND
2018-03-19CA1010017_009_009-201803191332ND
2018-03-19CA1010017_042_042-201803191207ND
2018-04-09CA1010017_004_004-201804091113ND
2019-06-19CA1010017_057_057-201906190910ND
2019-06-19CA1010017_041_041-201906191120ND
2019-06-19CA1010017_058_058-201906190855ND
2019-06-19CA1010017_040_040-201906191115ND
2019-06-19CA1010017_066_066-201906190957ND
2019-06-19CA1010017_056_056-201906190926ND
2019-06-19CA1010017_059_059-201906190955ND
2019-06-19CA1010017_043_043-201906191310ND
2019-06-19CA1010017_037_037-201906191030ND
2019-06-19CA1010017_044_044-201906191320ND
2019-06-19CA1010017_046_046-201906191000ND
2019-06-19CA1010017_065_065-201906190940ND
2019-06-26CA1010017_066_066-201906261230ND
2019-12-18CA1010017_038_038-201912180933ND
2020-05-06CA1010017_047_047-202005061050ND
2020-05-06CA1010017_049_049-202005061025ND
2020-05-06CA1010017_048_048-202005060920ND
2021-03-08CA1010017_001_001-202103081300ND
2021-03-08CA1010017_009_009-202103081140ND
2021-04-05CA1010017_006_006-202104050900ND
2021-04-05CA1010017_004_004-202104051120ND
2021-04-05CA1010017_008_008-202104051100ND
2021-04-06CA1010017_012_012-202104061300ND
2021-04-06CA1010017_011_011-202104061245ND
2021-04-06CA1010017_042_042-202104061230ND
2021-04-12CA1010017_014_014-202104121400ND
2021-04-12CA1010017_015_015-202104121345ND
2021-04-13CA1010017_034_034-202104131155ND
2021-04-13CA1010017_062_062-202104131300ND
2021-04-14CA1010017_005_005-202104141326ND
2021-04-14CA1010017_033_033-202104141300ND
2021-04-19CA1010017_036_036-202104191055ND
2021-04-19CA1010017_035_035-202104191045ND
2021-04-27CA1010017_004_004-202104271330ND
2021-04-27CA1010017_002_002-202104271300ND
2021-04-27CA1010017_008_008-202104271150ND
2021-04-27CA1010017_006_006-202104271220ND
2022-04-04CA1010017_043_043-202204041045ND
2022-04-04CA1010017_040_040-202204041105ND
2022-04-04CA1010017_044_044-202204041030ND
2022-04-04CA1010017_037_037-202204041135ND
2022-04-19CA1010017_046_046-202204191300ND
2022-04-19CA1010017_038_038-202204191030ND
2022-06-24CA1010017_041_041-202206241150ND
2022-06-24CA1010017_059_059-202206241320ND
2022-06-24CA1010017_058_058-202206241355ND
2022-06-24CA1010017_057_057-202206241410ND
2022-06-24CA1010017_056_056-202206241415ND
2022-06-24CA1010017_065_065-202206241310ND
2022-06-24CA1010017_066_066-202206241330ND
2023-04-24CA1010017_049_049-202304241210ND
2023-04-24CA1010017_048_048-202304241140ND
2023-04-24CA1010017_047_047-202304241125ND