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EWG's Tap Water Database — 2021 UPDATE

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Diquat

City of Sacramento Main

Diquat is a herbicide used on potato crops and aquatic weeds.

MORE ABOUT THIS CONTAMINANT

 

112

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND150ND
2015ND30ND
2016ND420ND
2017ND120ND
2018N/A00N/A
2019ND400ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 6 ppb

The EWG Health Guideline of 6 ppb for diquat 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 cataracts.

EPA Maximum Contaminant
Level (MCL) 20 ppb

The legal limit for diquat, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-052706-042-1140ND
2014-02-062706-023-1330ND
2014-02-192706-022-1045ND
2014-02-212706-055-1200ND
2014-02-262706-029-1020ND
2014-03-202706-052-1015ND
2014-03-252706-050-1030ND
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
2015-01-202706-016-0955ND
2015-02-102706-032-1025ND
2015-02-192706-017-1035ND
2016-04-195810-051-1115ND
2016-06-135810-010-1110ND
2016-08-095810-002-1052ND
2016-08-095810-008-0900ND
2016-08-115810-010-1310ND
2016-08-115810-051-1128ND
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
2019-06-069590-002-1330ND
2019-06-069590-056-1233ND
2019-08-149590-002-1055ND
2019-08-149590-008-0945ND