Know Your Environment. Protect Your Health.

Diquat

Altoona Water Authority

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

 

22

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
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
2020-05-1822286928.00ND
2020-05-1822286901.00ND
2020-05-1822286955.00ND
2020-05-2122483930.00ND
2020-05-2122483984.00ND
2020-05-2122483956.00ND
2020-07-1522676311.00ND
2020-07-1522676338.00ND
2020-07-1522676144.00ND
2020-07-1622869585.00ND
2020-07-1622676392.00ND
2020-07-1622676365.00ND
2023-04-2728974672.00ND
2023-04-2728974652.00ND
2023-05-0328974812.00ND
2023-05-0328974779.00ND
2023-05-0428974717.00ND
2023-08-0229571008.00ND
2023-08-0229571029.00ND
2023-08-0329571068.00ND
2023-08-0329571089.00ND
2023-08-1029571120.00ND