Know Your Environment. Protect Your Health.

Perchlorate

Yuima Municipal Water District Ida

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.

 

336

Samples

0

Samples exceeding legal limit (MCL)

91

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.780 ppb6510ND - 6.20 ppb
20191.51 ppb5115ND - 6.40 ppb
20201.44 ppb4914ND - 6.20 ppb
20211.57 ppb4816ND - 6.20 ppb
20221.35 ppb6117ND - 6.90 ppb
20231.57 ppb6219ND - 16.0 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
2018-01-09CA3700938_004_004-201801091040ND
2018-01-09CA3700938_005_005-2018010908305.20 ppb
2018-01-09CA3700938_006_006-201801090840ND
2018-01-09CA3700938_017_017-201801090820ND
2018-01-09CA3700938_012_012-2018010909204.10 ppb
2018-01-09CA3700938_020_020-201801090930ND
2018-01-09CA3700938_026_026-201801091110ND
2018-01-09CA3700938_047_047-2018010907454.50 ppb
2018-01-09CA3700938_025_025-201801090855ND
2018-01-09CA3700938_031_031-2018010910454.20 ppb
2018-01-09CA3700938_048_048-201801091045ND
2018-01-23CA3700938_011_011-201801230900ND
2018-02-13CA3700938_017_017-201802131000ND
2018-02-13CA3700938_025_025-201802130920ND
2018-02-13CA3700938_037_037-201802131045ND
2018-02-13CA3700938_026_026-201802131030ND
2018-03-13CA3700938_026_026-201803131045ND
2018-03-13CA3700938_025_025-201803130910ND
2018-03-13CA3700938_017_017-201803130945ND
2018-04-10CA3700938_026_026-201804100910ND
2018-04-10CA3700938_017_017-201804100900ND
2018-04-10CA3700938_020_020-201804101030ND
2018-04-10CA3700938_031_031-201804100940ND
2018-04-10CA3700938_006_006-201804100930ND
2018-04-10CA3700938_012_012-201804100800ND
2018-04-10CA3700938_025_025-201804100945ND
2018-04-10CA3700938_047_047-201804101100ND
2018-04-10CA3700938_005_005-201804101000ND
2018-05-08CA3700938_026_026-201805081145ND
2018-05-08CA3700938_025_025-201805080850ND
2018-05-08CA3700938_017_017-201805080800ND
2018-06-12CA3700938_025_025-201806121015ND
2018-06-12CA3700938_026_026-201806120840ND
2018-06-12CA3700938_017_017-201806120900ND
2018-07-10CA3700938_004_004-201807101105ND
2018-07-10CA3700938_012_012-201807100800ND
2018-07-10CA3700938_026_026-201807101000ND
2018-07-10CA3700938_031_031-2018071009505.40 ppb
2018-07-10CA3700938_005_005-2018071008306.20 ppb
2018-07-10CA3700938_020_020-201807101050ND
2018-07-10CA3700938_006_006-201807100850ND
2018-07-10CA3700938_017_017-201807101015ND
2018-07-10CA3700938_047_047-2018071011155.70 ppb
2018-07-10CA3700938_025_025-201807100910ND
2018-08-14CA3700938_025_025-201808140910ND
2018-08-14CA3700938_017_017-201808140820ND
2018-08-14CA3700938_026_026-201808140745ND
2018-09-11CA3700938_017_017-201809110910ND
2018-09-11CA3700938_025_025-201809110845ND
2018-09-11CA3700938_026_026-201809110800ND
2018-10-09CA3700938_020_020-201810090830ND
2018-10-09CA3700938_012_012-201810091105ND
2018-10-09CA3700938_026_026-201810091140ND
2018-10-09CA3700938_005_005-2018100909455.80 ppb
2018-10-09CA3700938_025_025-201810090940ND
2018-10-09CA3700938_006_006-201810090950ND
2018-10-09CA3700938_017_017-201810090915ND
2018-10-09CA3700938_047_047-2018100911405.50 ppb
2018-10-30CA3700938_031_031-2018103009154.10 ppb
2018-11-13CA3700938_017_017-201811130930ND
2018-11-13CA3700938_026_026-201811131000ND
2018-11-13CA3700938_025_025-201811130850ND
2018-12-11CA3700938_026_026-201812110945ND
2018-12-11CA3700938_017_017-201812110800ND
2018-12-11CA3700938_025_025-201812110815ND
2019-01-08CA3700938_012_012-2019010808154.60 ppb
2019-01-08CA3700938_005_005-2019010808455.80 ppb
2019-01-08CA3700938_006_006-201901080830ND
2019-01-08CA3700938_026_026-201901081000ND
2019-01-08CA3700938_048_048-201901081010ND
2019-01-08CA3700938_011_011-201901080800ND
2019-01-08CA3700938_031_031-2019010809454.40 ppb
2019-01-08CA3700938_037_037-201901081015ND
2019-01-08CA3700938_004_004-201901081015ND
2019-01-08CA3700938_017_017-201901080945ND
2019-01-08CA3700938_025_025-201901080900ND
2019-01-08CA3700938_047_047-2019010810305.50 ppb
2019-02-12CA3700938_026_026-201902121030ND
2019-02-12CA3700938_025_025-201902120830ND
2019-02-12CA3700938_017_017-201902121000ND
2019-03-12CA3700938_025_025-201903121015ND
2019-03-12CA3700938_048_048-201903121045ND
2019-04-09CA3700938_020_020-201904091005ND
2019-04-09CA3700938_031_031-2019040911005.90 ppb
2019-04-09CA3700938_012_012-2019040911254.60 ppb
2019-04-09CA3700938_006_006-201904091120ND
2019-04-09CA3700938_025_025-201904091105ND
2019-04-09CA3700938_026_026-201904090930ND
2019-04-09CA3700938_047_047-2019040910154.20 ppb
2019-04-09CA3700938_005_005-2019040911156.30 ppb
2019-04-09CA3700938_017_017-201904090950ND
2019-04-30CA3700938_020_020-201904300800ND
2019-06-11CA3700938_005_005-2019061112005.30 ppb
2019-06-11CA3700938_025_025-201906111120ND
2019-07-09CA3700938_006_006-201907090800ND
2019-07-09CA3700938_012_012-201907090845ND
2019-07-09CA3700938_017_017-201907091030ND
2019-07-09CA3700938_026_026-201907091100ND
2019-07-09CA3700938_047_047-2019070911305.10 ppb
2019-07-09CA3700938_025_025-201907090745ND
2019-07-09CA3700938_031_031-2019070907304.20 ppb
2019-07-09CA3700938_005_005-2019070908155.70 ppb
2019-07-09CA3700938_020_020-201907091130ND
2019-08-13CA3700938_025_025-201908130850ND
2019-09-10CA3700938_025_025-201909101000ND
2019-10-08CA3700938_005_005-2019100809406.40 ppb
2019-10-08CA3700938_025_025-201910081000ND
2019-10-08CA3700938_020_020-201910081045ND
2019-10-08CA3700938_031_031-201910080950ND
2019-10-08CA3700938_006_006-201910080930ND
2019-10-08CA3700938_012_012-2019100809004.20 ppb
2019-10-08CA3700938_017_017-201910080720ND
2019-10-08CA3700938_026_026-201910080755ND
2019-10-08CA3700938_047_047-2019100811004.80 ppb
2019-11-12CA3700938_025_025-201911121015ND
2019-12-03CA3700938_025_025-201912030945ND
2020-01-14CA3700938_048_048-202001140817ND
2020-01-14CA3700938_005_005-2020011410155.50 ppb
2020-01-14CA3700938_020_020-202001140810ND
2020-01-14CA3700938_025_025-202001141000ND
2020-01-14CA3700938_047_047-2020011408504.50 ppb
2020-01-14CA3700938_004_004-202001140800ND
2020-01-14CA3700938_011_011-202001141033ND
2020-01-14CA3700938_012_012-2020011410074.50 ppb
2020-01-14CA3700938_017_017-202001140900ND
2020-01-14CA3700938_026_026-202001140830ND
2020-01-14CA3700938_037_037-202001140815ND
2020-01-14CA3700938_031_031-2020011409505.10 ppb
2020-02-11CA3700938_025_025-202002110820ND
2020-03-10CA3700938_025_025-202003101020ND
2020-04-14CA3700938_017_017-202004140725ND
2020-04-14CA3700938_006_006-2020041409005.10 ppb
2020-04-14CA3700938_012_012-2020041408304.20 ppb
2020-04-14CA3700938_047_047-2020041410304.40 ppb
2020-04-14CA3700938_005_005-2020041409106.10 ppb
2020-04-14CA3700938_025_025-202004140945ND
2020-04-14CA3700938_031_031-2020041409304.90 ppb
2020-04-14CA3700938_020_020-202004141015ND
2020-04-14CA3700938_026_026-202004140710ND
2020-04-22CA3700938_005_005-2020042210006.20 ppb
2020-05-12CA3700938_025_025-202005120830ND
2020-06-09CA3700938_025_025-202006090800ND
2020-06-09CA3700938_037_037-202006090720ND
2020-07-14CA3700938_017_017-202007141050ND
2020-07-14CA3700938_031_031-202007141035ND
2020-07-14CA3700938_026_026-202007141140ND
2020-07-14CA3700938_005_005-2020071410205.40 ppb
2020-07-14CA3700938_006_006-202007141010ND
2020-07-14CA3700938_025_025-202007141025ND
2020-07-14CA3700938_047_047-2020071412155.30 ppb
2020-07-14CA3700938_012_012-202007141110ND
2020-08-11CA3700938_020_020-202008110814ND
2020-08-11CA3700938_025_025-202008110840ND
2020-09-10CA3700938_025_025-202009100740ND
2020-10-13CA3700938_005_005-2020101308304.20 ppb
2020-10-13CA3700938_026_026-202010130900ND
2020-10-13CA3700938_006_006-202010130920ND
2020-10-13CA3700938_017_017-202010130930ND
2020-10-13CA3700938_020_020-202010131000ND
2020-10-13CA3700938_047_047-2020101310305.30 ppb
2020-10-13CA3700938_012_012-202010131000ND
2020-10-13CA3700938_025_025-202010130820ND
2020-10-13CA3700938_031_031-202010130820ND
2020-11-18CA3700938_025_025-202011180745ND
2020-12-21CA3700938_025_025-202012210915ND
2021-01-12CA3700938_004_004-202101121000ND
2021-01-12CA3700938_011_011-202101120900ND
2021-01-12CA3700938_017_017-202101121120ND
2021-01-12CA3700938_031_031-2021011209554.00 ppb
2021-01-12CA3700938_037_037-202101121000ND
2021-01-12CA3700938_047_047-2021011210005.70 ppb
2021-01-12CA3700938_048_048-202101121000ND
2021-01-12CA3700938_005_005-2021011209406.20 ppb
2021-01-12CA3700938_006_006-202101120930ND
2021-01-12CA3700938_012_012-2021011209154.10 ppb
2021-01-12CA3700938_020_020-202101121000ND
2021-01-12CA3700938_026_026-202101121050ND
2021-01-21CA3700938_025_025-202101210825ND
2021-02-09CA3700938_025_025-202102090820ND
2021-03-09CA3700938_025_025-202103091200ND
2021-04-13CA3700938_047_047-2021041314005.60 ppb
2021-04-13CA3700938_020_020-202104131345ND
2021-04-13CA3700938_025_025-202104131245ND
2021-04-13CA3700938_031_031-2021041312504.50 ppb
2021-04-13CA3700938_006_006-202104131215ND
2021-04-13CA3700938_012_012-202104131230ND
2021-04-13CA3700938_017_017-202104131310ND
2021-04-13CA3700938_026_026-202104131330ND
2021-04-13CA3700938_005_005-2021041312006.00 ppb
2021-05-11CA3700938_025_025-202105111225ND
2021-06-08CA3700938_025_025-202106081100ND
2021-07-13CA3700938_047_047-2021071309205.20 ppb
2021-07-13CA3700938_006_006-202107130845ND
2021-07-13CA3700938_017_017-202107130740ND
2021-07-13CA3700938_020_020-202107130840ND
2021-07-13CA3700938_026_026-202107130800ND
2021-07-13CA3700938_012_012-2021071308253.50 ppb
2021-07-13CA3700938_031_031-2021071309153.00 ppb
2021-07-13CA3700938_005_005-2021071309304.70 ppb
2021-07-13CA3700938_025_025-202107130900ND
2021-08-10CA3700938_025_025-202108100800ND
2021-09-14CA3700938_025_025-202109141340ND
2021-10-18CA3700938_047_047-2021101812155.20 ppb
2021-10-18CA3700938_005_005-2021101809405.20 ppb
2021-10-18CA3700938_006_006-2021101809304.30 ppb
2021-10-18CA3700938_012_012-2021101811004.80 ppb
2021-10-18CA3700938_017_017-202110180930ND
2021-10-18CA3700938_025_025-202110180940ND
2021-10-18CA3700938_031_031-2021101809403.20 ppb
2021-10-18CA3700938_020_020-202110181030ND
2021-10-18CA3700938_026_026-202110181000ND
2021-11-08CA3700938_025_025-202111081120ND
2021-12-20CA3700938_025_025-202112201145ND
2022-01-10CA3700938_011_011-202201101015ND
2022-01-10CA3700938_012_012-2022011008004.50 ppb
2022-01-10CA3700938_017_017-202201100950ND
2022-01-10CA3700938_037_037-202201100820ND
2022-01-10CA3700938_047_047-2022011009205.40 ppb
2022-01-10CA3700938_020_020-202201100800ND
2022-01-10CA3700938_031_031-2022011009104.00 ppb
2022-01-10CA3700938_026_026-202201100930ND
2022-01-10CA3700938_005_005-2022011008555.70 ppb
2022-01-10CA3700938_025_025-202201100920ND
2022-01-10CA3700938_048_048-202201100810ND
2022-02-08CA3700938_025_025-202202081010ND
2022-02-08CA3700938_017_017-202202080940ND
2022-02-08CA3700938_004_004-202202080915ND
2022-02-08CA3700938_026_026-202202080900ND
2022-03-08CA3700938_025_025-202203081000ND
2022-03-08CA3700938_026_026-202203080905ND
2022-03-08CA3700938_017_017-202203080850ND
2022-03-09CA3700938_048_048-202203091320ND
2022-04-04CA3700938_017_017-202204041220ND
2022-04-04CA3700938_031_031-2022040412504.20 ppb
2022-04-04CA3700938_012_012-2022040412005.10 ppb
2022-04-04CA3700938_020_020-202204041120ND
2022-04-04CA3700938_026_026-202204041145ND
2022-04-04CA3700938_005_005-2022040412406.50 ppb
2022-04-04CA3700938_025_025-202204041300ND
2022-04-04CA3700938_047_047-2022040412005.00 ppb
2022-05-09CA3700938_017_017-202205091310ND
2022-05-09CA3700938_026_026-202205091315ND
2022-05-09CA3700938_025_025-202205091355ND
2022-06-14CA3700938_017_017-202206141315ND
2022-06-14CA3700938_025_025-202206141330ND
2022-06-14CA3700938_026_026-202206141300ND
2022-07-05CA3700938_020_020-202207051215ND
2022-07-05CA3700938_026_026-202207051300ND
2022-07-05CA3700938_047_047-2022070513105.60 ppb
2022-07-05CA3700938_017_017-2022070512002.00 ppb
2022-07-06CA3700938_005_005-2022070612506.90 ppb
2022-07-06CA3700938_025_025-202207061220ND
2022-07-12CA3700938_012_012-2022071213304.60 ppb
2022-08-09CA3700938_026_026-202208091010ND
2022-08-09CA3700938_025_025-202208090815ND
2022-08-09CA3700938_017_017-202208090955ND
2022-09-14CA3700938_017_017-202209141000ND
2022-09-14CA3700938_026_026-202209140950ND
2022-09-16CA3700938_025_025-202209160815ND
2022-10-12CA3700938_020_020-202210120836ND
2022-10-12CA3700938_025_025-202210120920ND
2022-10-12CA3700938_026_026-202210120800ND
2022-10-12CA3700938_005_005-2022101209105.90 ppb
2022-10-12CA3700938_017_017-202210120815ND
2022-10-12CA3700938_047_047-2022101209305.50 ppb
2022-10-12CA3700938_012_012-2022101208453.80 ppb
2022-10-12CA3700938_031_031-2022101209353.30 ppb
2022-11-15CA3700938_025_025-202211151400ND
2022-11-16CA3700938_017_017-202211161300ND
2022-11-16CA3700938_026_026-202211161325ND
2022-12-19CA3700938_017_017-202212191225ND
2022-12-19CA3700938_026_026-202212191230ND
2022-12-19CA3700938_025_025-202212191345ND
2022-12-20CA3700938_047_047-2022122013304.60 ppb
2023-01-09CA3700938_005_005-2023010912455.30 ppb
2023-01-09CA3700938_017_017-202301091220ND
2023-01-09CA3700938_031_031-2023010912553.90 ppb
2023-01-09CA3700938_025_025-2023010913154.40 ppb
2023-01-09CA3700938_026_026-202301091230ND
2023-01-10CA3700938_011_011-202301101240ND
2023-01-10CA3700938_020_020-202301101330ND
2023-01-10CA3700938_037_037-202301101345ND
2023-01-10CA3700938_012_012-2023011013004.40 ppb
2023-01-10CA3700938_047_047-2023011014004.00 ppb
2023-02-15CA3700938_017_017-202302151005ND
2023-02-15CA3700938_025_025-202302150945ND
2023-02-15CA3700938_026_026-202302151020ND
2023-02-15CA3700938_004_004-202302151035ND
2023-03-16CA3700938_017_017-202303161352ND
2023-03-16CA3700938_025_025-202303161340ND
2023-03-16CA3700938_026_026-202303161312ND
2023-03-16CA3700938_048_048-202303161300ND
2023-03-16CA3700938_031_031-2023031613454.80 ppb
2023-04-10CA3700938_025_025-202304101340ND
2023-04-10CA3700938_031_031-2023041013585.10 ppb
2023-04-10CA3700938_005_005-2023041013507.50 ppb
2023-04-10CA3700938_006_006-2023041014055.20 ppb
2023-04-11CA3700938_020_020-202304111230ND
2023-04-11CA3700938_047_047-2023041113204.90 ppb
2023-04-11CA3700938_017_017-202304111340ND
2023-04-11CA3700938_026_026-202304111352ND
2023-05-01CA3700938_017_017-202305010820ND
2023-05-01CA3700938_025_025-202305010930ND
2023-05-01CA3700938_026_026-202305010900ND
2023-06-05CA3700938_025_025-202306051010ND
2023-06-05CA3700938_017_017-202306050900ND
2023-06-05CA3700938_037_037-202306050930ND
2023-06-05CA3700938_026_026-202306050910ND
2023-07-11CA3700938_012_012-2023071109154.90 ppb
2023-07-11CA3700938_047_047-20230711084016.0 ppb
2023-07-11CA3700938_020_020-202307110750ND
2023-07-11CA3700938_031_031-2023071107303.80 ppb
2023-07-11CA3700938_017_017-202307110935ND
2023-07-11CA3700938_025_025-202307110700ND
2023-07-11CA3700938_026_026-202307110700ND
2023-08-07CA3700938_026_026-202308070830ND
2023-08-07CA3700938_017_017-202308070850ND
2023-08-07CA3700938_025_025-2023080709152.20 ppb
2023-09-06CA3700938_026_026-202309060850ND
2023-09-06CA3700938_005_005-2023090608005.40 ppb
2023-09-06CA3700938_017_017-202309060830ND
2023-09-06CA3700938_025_025-202309060800ND
2023-10-02CA3700938_026_026-202310020915ND
2023-10-02CA3700938_047_047-2023100210004.40 ppb
2023-10-02CA3700938_005_005-2023100208454.80 ppb
2023-10-02CA3700938_006_006-2023100208153.90 ppb
2023-10-02CA3700938_025_025-202310020800ND
2023-10-02CA3700938_017_017-202310020950ND
2023-10-02CA3700938_020_020-202310020820ND
2023-10-02CA3700938_031_031-2023100208302.70 ppb
2023-11-06CA3700938_017_017-202311060930ND
2023-11-06CA3700938_025_025-202311060920ND
2023-11-06CA3700938_026_026-202311060940ND
2023-12-04CA3700938_026_026-202312040755ND
2023-12-04CA3700938_017_017-202312040835ND
2023-12-04CA3700938_025_025-202312040855ND