Know Your Environment. Protect Your Health.

Perchlorate

Terra Bella Irrigation District - Tbt

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND20ND
2020ND70ND
2021ND40ND
2022ND10ND
2023ND60ND

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
2018-09-17CA5410038_001_001-201809171140ND
2018-09-24CA5410038_027_027-201809241445ND
2018-09-24CA5410038_032_032-201809241300ND
2018-09-24CA5410038_024_024-201809241415ND
2019-08-29CA5410038_001_001-201908291400ND
2019-11-21CA5410038_025_025-201911211301ND
2020-08-27CA5410038_001_001-202008271300ND
2020-08-31CA5410038_020_020-202008311215ND
2020-08-31CA5410038_002_002-202008311202ND
2020-08-31CA5410038_016_016-202008311150ND
2020-11-30CA5410038_025_025-202011301235ND
2020-11-30CA5410038_009_009-202011301205ND
2020-12-29CA5410038_028_028-202012291250ND
2021-08-23CA5410038_001_001-202108231210ND
2021-09-13CA5410038_032_032-202109131219ND
2021-09-13CA5410038_024_024-202109131244ND
2021-09-13CA5410038_027_027-202109131310ND
2022-08-15CA5410038_001_001-202208151150ND
2023-09-12CA5410038_025_025-202309121230ND
2023-09-12CA5410038_009_009-202309121158ND
2023-09-12CA5410038_016_016-202309121138ND
2023-09-12CA5410038_020_020-202309121147ND
2023-09-12CA5410038_002_002-202309121152ND
2023-09-18CA5410038_001_001-202309181330ND