Know Your Environment. Protect Your Health.

Diquat

Horsham Water&sewer Authority

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
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023ND240ND

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
2023-02-0828520594.00ND
2023-02-0828520525.00ND
2023-02-1528520571.00ND
2023-02-1528520548.00ND
2023-03-0128520620.00ND
2023-03-0128520648.00ND
2023-04-1828899758.00ND
2023-04-1828899629.00ND
2023-04-1828900331.00ND
2023-04-1828899702.00ND
2023-04-1829107837.00ND
2023-04-1828899730.00ND
2023-07-2029496809.00ND
2023-07-2729496867.00ND
2023-07-2729496895.00ND
2023-08-1029699518.00ND
2023-08-1029699490.00ND
2023-08-2429496864.00ND
2023-10-2630071330.00ND
2023-10-2630071302.00ND
2023-10-2630070795.00ND
2023-10-2630071386.00ND
2023-10-2630070823.00ND
2023-10-2630071358.00ND