Know Your Environment. Protect Your Health.

Perchlorate

Coast Springs - Cal. Water Service (puc)

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND110ND
2019ND100ND
2020ND90ND
2021ND110ND
2022ND100ND
2023ND90ND

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
2018-01-17CA2110007_016_016-201801171155ND
2018-07-13CA2110007_010_010-201807131230ND
2018-07-16CA2110007_006_006-201807161125ND
2018-07-16CA2110007_007_007-201807161155ND
2018-07-16CA2110007_008_008-201807161220ND
2018-07-19CA2110007_001_001-201807191310ND
2018-07-19CA2110007_016_016-201807191215ND
2018-07-19CA2110007_005_005-201807191220ND
2018-07-23CA2110007_003_003-201807231140ND
2018-07-23CA2110007_002_002-201807231215ND
2018-07-23CA2110007_004_004-201807231200ND
2019-07-23CA2110007_010_010-201907231045ND
2019-08-12CA2110007_001_001-201908121145ND
2019-08-12CA2110007_005_005-201908121030ND
2019-08-12CA2110007_016_016-201908121025ND
2019-08-13CA2110007_003_003-201908131100ND
2019-08-13CA2110007_002_002-201908131035ND
2019-08-13CA2110007_004_004-201908131050ND
2019-08-15CA2110007_007_007-201908151200ND
2019-08-15CA2110007_008_008-201908151210ND
2019-08-15CA2110007_006_006-201908151145ND
2020-06-22CA2110007_016_016-202006221145ND
2020-06-22CA2110007_005_005-202006221200ND
2020-06-24CA2110007_002_002-202006241245ND
2020-06-24CA2110007_001_001-202006241345ND
2020-06-24CA2110007_008_008-202006241010ND
2020-06-24CA2110007_003_003-202006241145ND
2020-06-24CA2110007_007_007-202006241050ND
2020-06-24CA2110007_004_004-202006241200ND
2020-07-14CA2110007_010_010-202007141050ND
2021-02-26CA2110007_006_006-202102261345ND
2021-06-14CA2110007_001_001-202106141110ND
2021-06-14CA2110007_006_006-202106141225ND
2021-06-14CA2110007_004_004-202106141210ND
2021-06-14CA2110007_002_002-202106141155ND
2021-06-22CA2110007_016_016-202106221100ND
2021-06-22CA2110007_005_005-202106221035ND
2021-06-22CA2110007_008_008-202106221010ND
2021-07-01CA2110007_007_007-202107011155ND
2021-07-06CA2110007_010_010-202107060900ND
2021-07-06CA2110007_003_003-202107060950ND
2022-06-13CA2110007_001_001-202206131150ND
2022-06-14CA2110007_016_016-202206141225ND
2022-06-14CA2110007_007_007-202206141050ND
2022-06-14CA2110007_002_002-202206141145ND
2022-06-14CA2110007_006_006-202206141010ND
2022-06-14CA2110007_005_005-202206141215ND
2022-06-28CA2110007_008_008-202206281130ND
2022-07-19CA2110007_004_004-202207191045ND
2022-07-19CA2110007_003_003-202207191100ND
2022-07-19CA2110007_010_010-202207191210ND
2023-06-06CA2110007_001_001-202306061140ND
2023-06-19CA2110007_016_016-202306191000ND
2023-06-19CA2110007_005_005-202306190930ND
2023-06-21CA2110007_007_007-202306210930ND
2023-06-21CA2110007_006_006-202306210900ND
2023-06-22CA2110007_008_008-202306221130ND
2023-06-27CA2110007_004_004-202306270930ND
2023-06-28CA2110007_002_002-202306280945ND
2023-07-18CA2110007_010_010-202307181140ND