Know Your Environment. Protect Your Health.

Diquat

Elizabethtown Area Water

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
2020-05-2622567520.00ND
2020-05-2622567550.00ND
2020-05-2622567430.00ND
2020-05-2622567490.00ND
2020-05-2622567400.00ND
2020-05-2622567460.00ND
2020-08-0322957760.00ND
2020-08-0322957730.00ND
2020-08-0322957640.00ND
2020-08-0322957700.00ND
2020-08-0322957610.00ND
2020-08-0322957670.00ND
2023-04-2429061663.00ND
2023-04-2429061666.00ND
2023-04-2429061668.00ND
2023-04-2429061665.00ND
2023-04-2429061667.00ND
2023-04-2429061664.00ND
2023-08-2829849144.00ND
2023-08-2829849143.00ND
2023-08-2829849142.00ND
2023-08-2829849145.00ND
2023-08-2829849141.00ND
2023-08-2829849140.00ND