Know Your Environment. Protect Your Health.

Diquat

Swta - Main System

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

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND140ND
2021N/A00N/A
2022N/A00N/A
2023ND140ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2020-04-0722080435.00ND
2020-04-0722080465.00ND
2020-04-0722080525.00ND
2020-04-0722080405.00ND
2020-04-0722080495.00ND
2020-04-0722080375.00ND
2020-04-0722080345.00ND
2020-07-2822854596.00ND
2020-07-2822854656.00ND
2020-07-2822854746.00ND
2020-07-2822854626.00ND
2020-07-2822854566.00ND
2020-07-2822854686.00ND
2020-07-2822854716.00ND
2023-05-0228960645.00ND
2023-05-0228960644.00ND
2023-05-0228960647.00ND
2023-05-0228960643.00ND
2023-05-0228960646.00ND
2023-05-0228960642.00ND
2023-06-2729166826.00ND
2023-08-0829556329.00ND
2023-08-0829556331.00ND
2023-08-0829556332.00ND
2023-08-0829556328.00ND
2023-08-0829556333.00ND
2023-08-0829556327.00ND
2023-08-0829556330.00ND