Know Your Environment. Protect Your Health.

Diquat

Crestwood Mobile Home Park

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

 

7

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
20225.00 ppb31ND - 15.0 ppb
2023ND40ND

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
2022-07-2081031323115.0 ppb
2022-08-09810336851ND
2022-10-19O202837-QUA-1ND
2023-01-24O205549-QUA-1ND
2023-05-16O209211-QUA-1ND
2023-07-18O210824-QUA-1ND
2023-10-17O213131-QUA-1ND