Know Your Environment. Protect Your Health.

Diquat

Newberry System

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

 

24

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
2020ND120ND
2021N/A00N/A
2022N/A00N/A
2023ND120ND

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
2020-04-2322184196.00ND
2020-04-2322184160.00ND
2020-04-3022184222.00ND
2020-05-1922383223.00ND
2020-05-1922383187.00ND
2020-05-1922383259.00ND
2020-08-1322969991.00ND
2020-08-1322969950.00ND
2020-08-2722970413.00ND
2020-08-2722970339.00ND
2020-08-2722970377.00ND
2020-08-2722970301.00ND
2023-04-0428871728.00ND
2023-04-0428871758.00ND
2023-04-0428871788.00ND
2023-04-1228872012.00ND
2023-04-1228872042.00ND
2023-04-1228871979.00ND
2023-07-1329467489.00ND
2023-07-1329467641.00ND
2023-07-1329467592.00ND
2023-07-1829467519.00ND
2023-07-1829467580.00ND
2023-07-1829467550.00ND