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EWG's Tap Water Database — 2021 UPDATE

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Diquat

Fort Rucker - American Water

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

MORE ABOUT THIS CONTAMINANT

 

33

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016ND140ND
2017N/A00N/A
2018N/A00N/A
2019ND190ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2016-01-21160121041-3ND
2016-01-21160121041-1ND
2016-01-21160121041-2ND
2016-01-21160121041-5ND
2016-01-21160121041-7ND
2016-01-21160121041-4ND
2016-01-21160121041-6ND
2016-04-21160421053-3ND
2016-04-21160421053-7ND
2016-04-21160421053-6ND
2016-04-21160421053-1ND
2016-04-21160421053-2ND
2016-04-21160421053-4ND
2016-04-21160421053-5ND
2019-01-292019-19010699-00ND
2019-01-292019-19010699-00ND
2019-01-2919010699-004HND
2019-01-292019-19010699-00ND
2019-01-292019-19010699-00ND
2019-01-292019-19010699-00ND
2019-01-2919010699-003HND
2019-01-2919010699-002HND
2019-01-2919010699-005HND
2019-01-2919010699-001HND
2019-05-2820105785004_ISOCND
2019-05-2820105785001_ISOCND
2019-05-2820105785006_ISOCND
2019-05-2820105785005_ISOCND
2019-05-2820105785003_ISOCND
2019-05-2820105785002_ISOCND
2019-05-2820105785007_ISOCND
2019-07-2920114664002_ISOCND
2019-07-2920114664001_ISOCND