Know Your Environment. Protect Your Health.

Perchlorate

Palm Ranch Irrigation District

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.

 

71

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND100ND
2019ND90ND
2020ND150ND
20211.21 ppb136ND - 3.20 ppb
20222.40 ppb97ND - 4.50 ppb
20231.52 ppb158ND - 3.60 ppb

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
2018-01-02CA1910103_013_013-201801020727ND
2018-01-02CA1910103_002_002-201801020726ND
2018-04-03CA1910103_013_013-201804030803ND
2018-04-03CA1910103_002_002-201804030800ND
2018-07-03CA1910103_002_002-201807030718ND
2018-07-03CA1910103_013_013-201807030719ND
2018-10-02CA1910103_002_002-201810020729ND
2018-10-02CA1910103_013_013-201810020726ND
2018-11-06CA1910103_007_007-201811060733ND
2018-11-06CA1910103_001_001-201811060802ND
2019-01-02CA1910103_002_002-201901020738ND
2019-01-02CA1910103_013_013-201901020739ND
2019-04-30CA1910103_002_002-201904300753ND
2019-06-04CA1910103_002_002-201906040635ND
2019-07-02CA1910103_013_013-201907020600ND
2019-07-02CA1910103_002_002-201907020600ND
2019-10-01CA1910103_013_013-201910010717ND
2019-10-01CA1910103_002_002-201910010715ND
2019-11-07CA1910103_015_015-201911070900ND
2020-01-07CA1910103_002_002-202001070728ND
2020-01-07CA1910103_013_013-202001070729ND
2020-04-07CA1910103_002_002-202004070729ND
2020-04-07CA1910103_013_013-202004070730ND
2020-06-16CA1910103_013_013-202006160617ND
2020-07-07CA1910103_001_001-202007070701ND
2020-07-07CA1910103_002_002-202007070640ND
2020-07-07CA1910103_013_013-202007070641ND
2020-07-07CA1910103_007_007-202007070727ND
2020-07-07CA1910103_015_015-202007070715ND
2020-10-06CA1910103_013_013-202010060507ND
2020-10-06CA1910103_002_002-202010060506ND
2020-12-08CA1910103_001_001-202012080741ND
2020-12-08CA1910103_015_015-202012080751ND
2020-12-08CA1910103_002_002-202012080732ND
2021-01-05CA1910103_002_002-202101050654ND
2021-01-05CA1910103_013_013-202101050651ND
2021-04-06CA1910103_013_013-202104060711ND
2021-04-06CA1910103_007_007-202104060739ND
2021-07-06CA1910103_002_002-2021070607072.40 ppb
2021-07-06CA1910103_013_013-2021070607102.00 ppb
2021-08-03CA1910103_007_007-202108030724ND
2021-09-28CA1910103_001_001-2021092807282.60 ppb
2021-09-28CA1910103_002_002-2021092807103.20 ppb
2021-09-28CA1910103_007_007-202109280804ND
2021-10-05CA1910103_002_002-2021100506383.20 ppb
2021-10-05CA1910103_013_013-2021100506372.30 ppb
2021-10-05CA1910103_007_007-202110050726ND
2022-04-04CA1910103_002_002-2022040408373.50 ppb
2022-04-04CA1910103_013_013-2022040408352.00 ppb
2022-07-12CA1910103_002_002-2022071206283.40 ppb
2022-07-12CA1910103_001_001-2022071206452.90 ppb
2022-07-12CA1910103_013_013-2022071206302.10 ppb
2022-10-04CA1910103_015_015-202210040701ND
2022-10-04CA1910103_013_013-2022100406343.20 ppb
2022-10-04CA1910103_002_002-2022100406334.50 ppb
2022-10-04CA1910103_007_007-202210040718ND
2023-01-03CA1910103_002_002-2023010308033.60 ppb
2023-01-03CA1910103_013_013-2023010308062.30 ppb
2023-01-10CA1910103_001_001-2023011008102.30 ppb
2023-01-10CA1910103_007_007-202301100752ND
2023-01-10CA1910103_015_015-202301100740ND
2023-01-17CA1910103_007_007-202301170653ND
2023-01-17CA1910103_015_015-202301170705ND
2023-01-17CA1910103_001_001-2023011707193.30 ppb
2023-01-17CA1910103_002_002-202301170728ND
2023-03-28CA1910103_002_002-2023032807302.70 ppb
2023-06-13CA1910103_002_002-2023061309153.30 ppb
2023-06-13CA1910103_007_007-202306130930ND
2023-06-13CA1910103_001_001-2023061309003.00 ppb
2023-06-13CA1910103_013_013-2023061309152.30 ppb
2023-06-13CA1910103_015_015-202306130920ND