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EWG's Tap Water Database — 2021 UPDATE

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Atrazine

City of Sacramento Main

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

 

110

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND30ND
2016ND420ND
2017ND120ND
2018N/A00N/A
2019ND400ND

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
2014-02-052706-042-1140ND
2014-02-192706-022-1045ND
2014-02-212706-055-1200ND
2014-02-262706-029-1020ND
2014-03-060007-023-1210ND
2014-04-112706-015-0930ND
2014-04-172706-038-1310ND
2014-06-252706-055-0745ND
2014-07-242706-015-0800ND
2014-07-242706-038-0924ND
2014-07-282706-052-1000ND
2014-12-022706-017-1050ND
2014-12-032706-054-1045ND
2015-02-102706-032-1025ND
2015-02-192706-016-1014ND
2015-02-192706-017-1035ND
2016-04-195810-051-1115ND
2016-06-135810-010-1110ND
2016-07-214790-010-1220ND
2016-07-214790-051-1030ND
2016-08-095810-002-1052ND
2016-08-095810-008-0900ND
2016-09-085810-032-1239ND
2016-09-085810-034-1210ND
2016-09-085810-035-1107ND
2016-09-085810-037-1040ND
2016-09-085810-038-1115ND
2016-09-085810-040-1210ND
2016-09-085810-041-1135ND
2016-09-085810-056-1145ND
2016-09-125810-009-1035ND
2016-09-125810-018-1045ND
2016-09-125810-027-1145ND
2016-09-125810-030-1238ND
2016-09-125810-045-1308ND
2016-09-125810-052-1125ND
2016-09-125810-054-1153ND
2016-09-125810-055-1233ND
2016-09-195810-028-1207ND
2016-11-025810-002-0904ND
2016-11-025810-008-1145ND
2016-12-015810-027-1117ND
2016-12-015810-028-1138ND
2016-12-015810-030-1228ND
2016-12-015810-032-1031ND
2016-12-015810-034-1020ND
2016-12-015810-035-1100ND
2016-12-015810-037-0915ND
2016-12-015810-038-0945ND
2016-12-015810-040-1005ND
2016-12-015810-041-1045ND
2016-12-015810-045-1054ND
2016-12-015810-056-1005ND
2016-12-065810-009-0840ND
2016-12-065810-018-0920ND
2016-12-065810-052-1000ND
2016-12-065810-054-1015ND
2016-12-065810-055-0935ND
2017-03-075810-023-1112ND
2017-03-075810-042-0950ND
2017-03-205810-022-1122ND
2017-03-205810-029-1240ND
2017-04-035810-015-1025ND
2017-04-195810-017-1045ND
2017-06-055810-022-1134ND
2017-06-055810-023-1108ND
2017-06-055810-029-1204ND
2017-06-055810-042-1034ND
2017-07-185810-015-1122ND
2017-07-185810-017-1052ND
2019-02-209590-009-0920ND
2019-02-209590-017-0925ND
2019-02-209590-018-1020ND
2019-02-209590-027-1040ND
2019-02-209590-030-1115ND
2019-02-209590-040-1155ND
2019-02-209590-045-1155ND
2019-02-209590-051-1241ND
2019-02-209590-054-1330ND
2019-02-209590-056-1400ND
2019-02-219590-032-1000ND
2019-02-219590-034-1150ND
2019-02-219590-035-1310ND
2019-02-219590-037-1000ND
2019-02-219590-038-1050ND
2019-02-219590-041-1200ND
2019-02-219590-052-1250ND
2019-03-059590-042-1100ND
2019-05-079590-027-1255ND
2019-05-079590-032-1455ND
2019-05-079590-034-1340ND
2019-05-079590-035-1137ND
2019-05-079590-040-0955ND
2019-05-079590-041-1228ND
2019-05-079590-042-0940ND
2019-05-079590-045-1342ND
2019-05-079590-051-1041ND
2019-05-079590-052-1052ND
2019-05-079590-054-1150ND
2019-05-099590-008-1120ND
2019-05-099590-009-1026ND
2019-05-099590-017-1210ND
2019-05-099590-018-1251ND
2019-05-099590-030-1356ND
2019-05-099590-037-1230ND
2019-05-099590-038-1320ND
2019-05-299590-002-1402ND
2019-05-299590-056-1043ND
2019-08-149590-002-1055ND
2019-08-149590-008-0945ND