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EWG's Tap Water Database — 2021 UPDATE

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Atrazine

Artesian Water Company

Atrazine is a herbicide commonly detected in drinking water that comes from cornfield and other agricultural runoff. It is a hormone disrupter that harms the male and female reproductive systems of people and wildlife. Read More.

Federal laws allow up to 3 parts per billion of atrazine in treated tap water. Water suppliers average atrazine measurements collected over a year, which means that the reported values underestimate intense spikes of elevated exposures during the periods in late spring and early summer when atrazine is applied in large amounts on farm fields.

Human epidemiological studies suggest that federal standards for atrazine are insufficient to protect public health. In 1999 the California Office of Environmental Health Hazard Assessment set a public health goal of 0.15 parts per billion for atrazine in drinking water, based on a study finding increased rates of breast cancer in rats exposed to the chemical. California’s legal maximum for atrazine in tap water is 1 ppb.

Click here to read more about atrazine.

MORE ABOUT THIS CONTAMINANT

 

189

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0147 ppb405ND - 0.133 ppb
20150.0165 ppb355ND - 0.129 ppb
20160.0153 ppb355ND - 0.117 ppb
2017ND270ND
2018ND330ND
2019ND190ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for atrazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water.. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

EPA Maximum Contaminant
Level (MCL) 3 ppb

The legal limit for atrazine, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. This limit does not fully protect against harm to the reproductive system, harm to the developing fetus, and hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-1814021630-525ND
2014-02-2014021627 - 525ND
2014-02-20L4799863-1 525ND
2014-02-25L4951899-1ND
2014-02-25L4951901-1ND
2014-02-25L4951903-1ND
2014-02-25L4951904-1ND
2014-02-27L4768585-525ND
2014-02-27L4805818-525ND
2014-02-27L4830599-1 525ND
2014-02-27L4830758-525ND
2014-02-27L4836771-525ND
2014-03-20L4836863-1 525ND
2014-03-20L4949104-525ND
2014-03-24L4949106-1 525ND
2014-03-24L4949108-525ND
2014-03-24L4949110-525ND
2014-03-24L4949113-525ND
2014-04-03L5006063-1 525ND
2014-04-03L5006064-1ND
2014-04-03L5006066-1ND
2014-04-15L5015387-1 525ND
2014-04-15L5015389-1 525ND
2014-04-15L5015391-1 5250.123 ppb
2014-04-16L5018984-1ND
2014-04-24L5024822-1 525ND
2014-04-24L5024826-1 525ND
2014-06-17L5110724-1ND
2014-07-01L5144326-1ND
2014-07-02L5144470-10.107 ppb
2014-09-03L5235055-1-525ND
2014-09-03L5235055-2-525ND
2014-10-06L5275099-10.106 ppb
2014-10-06L5275100-1ND
2014-11-05L5291674-10.117 ppb
2014-11-05L5315635-1ND
2014-11-05L5315635-2ND
2014-12-15L5359353-10.133 ppb
2014-12-15L5359597-1-525ND
2014-12-15L5359597-2-525ND
2015-01-09L5398026-1ND
2015-01-09L5398029-10.104 ppb
2015-01-26150122110 525ND
2015-01-2615012212-525ND
2015-01-2615012213 525ND
2015-01-2915012443-525ND
2015-01-2915012445 525ND
2015-01-2915012447 525ND
2015-01-2915012449-525ND
2015-01-3015020046 525ND
2015-01-3015020047 525ND
2015-01-3015020049 525ND
2015-02-26L5286929-1 5250.118 ppb
2015-03-02L5287047-1-525ND
2015-03-02L5293036-1 525ND
2015-03-02L5293104-1-525ND
2015-04-01L5513567-1-525ND
2015-04-01L5513690-1ND
2015-04-06L5527743-1ND
2015-04-06L5527752-1-525ND
2015-04-06L5527754-1-525ND
2015-04-15L5536818-1-525ND
2015-04-15L5536821-1-525ND
2015-04-15L5537210-1ND
2015-04-15L5537275-1-525ND
2015-04-16L5540963-1 525ND
2015-04-16L5540964-1-525ND
2015-04-16L5540965-1-525ND
2015-04-16L5541463-1-525ND
2015-04-16L5541466-1-5250.105 ppb
2015-07-10L5700000-10.129 ppb
2015-09-23L5534590-1 525ND
2015-10-02L5836564-10.120 ppb
2015-11-04L5902500-1ND
2015-12-10L5590066-1 525ND
2016-01-05L6006214-10.117 ppb
2016-01-15L5762486-1 525ND
2016-01-15L5820919-1 525ND
2016-01-15L5863869-1 525ND
2016-01-29L6019360-1 525ND
2016-01-29L6019361-1 525ND
2016-01-29L6019362-1 525ND
2016-02-17L6019363-1 525ND
2016-02-17L6019364-1 5250.109 ppb
2016-02-17L6019365-1 525ND
2016-02-23L6019366-1 525ND
2016-02-23L6019367-1 525ND
2016-02-23L6019368-1 525ND
2016-03-03L6111613-1 525ND
2016-03-08L6114129-1ND
2016-04-07L6170164-1 525ND
2016-04-07L6170166-1 525ND
2016-04-12L6175604-1 525ND
2016-04-13L6179210-1 525ND
2016-04-13L6179211-1 VOC0.110 ppb
2016-04-13L6179212-1 525ND
2016-04-13L6179213-1 525ND
2016-04-13L6179214-1 525ND
2016-04-15L6183101-1 525ND
2016-04-15L6183102-1 525ND
2016-04-15L6183103-1 525ND
2016-04-15L6183104-1 525ND
2016-05-20L6019372-1 525ND
2016-07-01L6342806-525ND
2016-07-11L6363785-5250.1000 ppb
2016-07-11L6363791 525ND
2016-08-05L6390073-525ND
2016-08-05L6410849-525ND
2016-10-05L6502152-5250.1000 ppb
2016-11-01L6527542- 525ND
2017-01-18L6547052 525ND
2017-01-20L6469070-1 525ND
2017-01-23L6485710-1 525ND
2017-01-23L6547102-1 525ND
2017-01-27L6650652 525ND
2017-01-27L6650653-525ND
2017-01-27L6650655 525ND
2017-01-27L6650656 525ND
2017-01-27L6650657 525ND
2017-01-31L6371963-1 525ND
2017-01-31L6372370-1 525ND
2017-01-31L6378581-1 525ND
2017-03-06L6485639ND
2017-03-09L6568580-525ND
2017-04-04L6752336-1 525ND
2017-04-04L6753812-1 525ND
2017-04-04L6762334-1 525ND
2017-04-05L6753802-1 525ND
2017-04-05L6753803-1 525ND
2017-04-05L6753806-1 525ND
2017-04-06L6754970-1 525ND
2017-04-13L676311-1 525ND
2017-04-13L6763126-1 525ND
2017-04-24L6771554-1 525ND
2017-04-24L6771555-1 525ND
2017-04-26L6775034-2 525ND
2017-11-28L6976731-1ND
2018-01-088011812-01ND
2018-01-268014291-01 525ND
2018-01-268014295-01 525ND
2018-02-238015062-01 525ND
2018-02-268015063-01 525ND
2018-02-268015064-01 525ND
2018-02-278030889-01 525ND
2018-03-018024104-01 525ND
2018-03-018030886-01 525ND
2018-03-018030887-01 525ND
2018-03-058030881-01 525ND
2018-03-058030882-01 525ND
2018-03-058030888-01 525ND
2018-03-068030883-01 525ND
2018-03-068030884-01 525ND
2018-03-168030879-01 525ND
2018-04-048034685-01ND
2018-04-168043156-01 525ND
2018-04-168043157-01 525ND
2018-04-168043158-01 525ND
2018-04-168043159-01 525ND
2018-04-168043163-01 525ND
2018-04-168043164-01 525ND
2018-04-168043165-01 525ND
2018-04-168043166-01 525ND
2018-04-168043167-01 525ND
2018-04-168043168-01 525ND
2018-05-238053616-01 525ND
2018-06-228043169-01 525ND
2018-07-068071562-01 525ND
2018-08-068082532-01 525ND
2018-10-098101738-01 525ND
2018-11-218105267-01 525ND
2019-01-048124606-01 525SND
2019-01-258122188-01 525SND
2019-01-258122189-01 525SND
2019-01-288122190-01 525SND
2019-01-308105269-01 525SND
2019-02-279020961-01 525SND
2019-03-079014984-01 525MND
2019-03-079020958-01 525SND
2019-03-129020956-01 525SND
2019-03-149020955-01 525SND
2019-03-159020957-01 525SND
2019-03-159020959-01 525SND
2019-03-159020960-01 525SND
2019-03-219033622-01 525SND
2019-03-219033623-01 525SND
2019-03-289033626-01 525SND
2019-03-289034331-01 525SND
2019-04-109042002-01 525SND
2019-09-169085950-01 525SND