Diquat
California Water Service (CWS) - Salinas
Diquat is a herbicide used on potato crops and aquatic weeds.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 13 | 0 | ND |
2015 | ND | 7 | 0 | ND |
2016 | ND | 21 | 0 | ND |
2017 | ND | 5 | 0 | ND |
2018 | ND | 22 | 0 | ND |
2019 | ND | 43 | 0 | ND |
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 |
---|---|---|
2014-02-12 | 9590-102-1313 | ND |
2014-02-12 | 9590-103-1400 | ND |
2014-02-12 | 9590-123-0927 | ND |
2014-02-19 | 9590-106-1135 | ND |
2014-05-07 | 9590-102-1415 | ND |
2014-05-07 | 9590-103-1458 | ND |
2014-05-13 | 9590-123-1023 | ND |
2014-08-04 | 9590-102-0905 | ND |
2014-08-04 | 9590-103-1413 | ND |
2014-08-04 | 9590-123-0935 | ND |
2014-11-12 | 9590-102-1022 | ND |
2014-11-12 | 9590-103-0956 | ND |
2014-11-12 | 9590-123-1403 | ND |
2015-02-07 | 9590-102-1102 | ND |
2015-02-07 | 9590-103-1048 | ND |
2015-02-07 | 9590-123-1136 | ND |
2015-04-21 | 9590-008-1358 | ND |
2015-05-14 | 9590-102-1552 | ND |
2015-05-14 | 9590-103-1508 | ND |
2015-05-14 | 9590-123-1433 | ND |
2016-01-07 | 9590-009-1044 | ND |
2016-01-07 | 9590-020-1006 | ND |
2016-01-20 | 9590-018-1242 | ND |
2016-02-04 | 9590-027-0944 | ND |
2016-02-09 | 9590-104-1216 | ND |
2016-02-10 | 9590-006-1206 | ND |
2016-02-22 | 9590-024-1517 | ND |
2016-03-01 | 9590-037-1250 | ND |
2016-03-03 | 9590-015-1424 | ND |
2016-04-05 | 9590-022-1342 | ND |
2016-04-27 | 9590-041-1037 | ND |
2016-05-03 | 9590-026-1256 | ND |
2016-05-04 | 9590-017-1422 | ND |
2016-06-28 | 9590-023-1350 | ND |
2016-08-02 | 9590-019-1100 | ND |
2016-09-14 | 9590-106-0907 | ND |
2016-09-20 | 9590-046-1104 | ND |
2016-10-05 | 9590-029-1002 | ND |
2016-10-05 | 9590-030-0903 | ND |
2016-12-07 | 9590-043-1443 | ND |
2016-12-29 | 9590-008-1413 | ND |
2017-01-19 | 9590-014-1048 | ND |
2017-03-02 | 9590-132-1100 | ND |
2017-04-05 | 9590-005-1428 | ND |
2017-11-21 | 9590-131-1240 | ND |
2017-12-14 | 9590-132-1456 | ND |
2018-02-01 | 9590-102-0955 | ND |
2018-02-01 | 9590-103-1043 | ND |
2018-02-06 | 9590-024-1030 | ND |
2018-03-19 | 9590-123-1200 | ND |
2018-03-20 | 9590-132-0953 | ND |
2018-05-01 | 9590-019-0943 | ND |
2018-05-01 | 9590-103-1010 | ND |
2018-05-02 | 9590-102-0858 | ND |
2018-05-03 | 9590-123-0928 | ND |
2018-06-07 | 9590-132-1033 | ND |
2018-08-02 | 9590-019-1056 | ND |
2018-09-04 | 9590-132-1034 | ND |
2018-10-02 | 9590-009-0928 | ND |
2018-10-09 | 9590-018-1140 | ND |
2018-10-29 | 9590-020-1318 | ND |
2018-11-06 | 9590-104-0936 | ND |
2018-11-07 | 9590-006-1026 | ND |
2018-11-08 | 9590-024-1201 | ND |
2018-11-20 | 9590-027-1346 | ND |
2018-12-06 | 9590-037-1016 | ND |
2018-12-06 | 9590-132-1148 | ND |
2018-12-18 | 9590-015-0944 | ND |
2019-01-03 | 9590-009-1359 | ND |
2019-01-03 | 9590-022-1009 | ND |
2019-01-23 | 9590-041-1311 | ND |
2019-01-29 | 9590-018-1411 | ND |
2019-02-05 | 9590-017-1431 | ND |
2019-02-05 | 9590-026-1409 | ND |
2019-02-06 | 9590-027-0924 | ND |
2019-02-20 | 9590-006-1031 | ND |
2019-02-20 | 9590-019-0921 | ND |
2019-02-20 | 9590-104-1139 | ND |
2019-03-14 | 9590-015-1443 | ND |
2019-03-19 | 9590-037-1414 | ND |
2019-03-21 | 9590-023-1310 | ND |
2019-03-21 | 9590-132-1440 | ND |
2019-04-01 | 9590-008-0915 | ND |
2019-04-01 | 9590-022-1120 | ND |
2019-04-02 | 9590-005-1406 | ND |
2019-04-11 | 9590-041-1206 | ND |
2019-05-01 | 9590-017-1232 | ND |
2019-05-01 | 9590-026-1411 | ND |
2019-05-08 | 9590-014-1433 | ND |
2019-05-08 | 9590-019-1004 | ND |
2019-06-12 | 9590-046-1030 | ND |
2019-06-18 | 9590-023-1321 | ND |
2019-06-18 | 9590-106-1107 | ND |
2019-06-18 | 9590-132-0948 | ND |
2019-07-02 | 9590-008-1020 | ND |
2019-07-10 | 9590-029-0937 | ND |
2019-07-16 | 9590-005-1130 | ND |
2019-07-18 | 9590-020-1120 | ND |
2019-07-18 | 9590-030-1340 | ND |
2019-08-01 | 9590-014-1129 | ND |
2019-09-12 | 9590-046-1045 | ND |
2019-09-12 | 9590-106-1057 | ND |
2019-09-12 | 9590-132-1442 | ND |
2019-09-17 | 9590-131-1340 | ND |
2019-09-25 | 9590-043-1242 | ND |
2019-10-01 | 9590-029-1125 | ND |
2019-10-03 | 9590-030-0940 | ND |
2019-10-08 | 9590-020-0949 | ND |
2019-12-03 | 9590-131-1013 | ND |
2019-12-03 | 9590-132-0946 | ND |
2019-12-05 | 9590-043-1357 | ND |