Know Your Environment. Protect Your Health.

Diquat

Telford Borough Authority

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

 

30

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
2020ND190ND
2021ND10ND
2022N/A00N/A
2023ND100ND

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
2020-03-0321850254.00ND
2020-03-0321850194.00ND
2020-03-0321850224.00ND
2020-03-0321850164.00ND
2020-06-0122419227.00ND
2020-06-0122419347.00ND
2020-06-0122419256.00ND
2020-06-0122419317.00ND
2020-06-0122419287.00ND
2020-08-2423002168.00ND
2020-08-2423002288.00ND
2020-08-2423002198.00ND
2020-08-2423002228.00ND
2020-09-1423002258.00ND
2020-10-1223185463.00ND
2020-10-1223185403.00ND
2020-10-1223185433.00ND
2020-10-1223185373.00ND
2020-12-0123540094.00ND
2021-01-1323715277.00ND
2023-05-0328902821.00ND
2023-05-0328902820.00ND
2023-05-0328902822.00ND
2023-05-0328902819.00ND
2023-05-0328902823.00ND
2023-08-0229500026.00ND
2023-08-0229500029.00ND
2023-08-0229500028.00ND
2023-08-0229500030.00ND
2023-08-0229500027.00ND