Know Your Environment. Protect Your Health.

Dalapon

Harris County MUD 490

NOTE: Harris County MUD 490 purchases water from Harris County Municipal Utility District 418 which is required to test for dalapon. Sample information shown below was taken by Harris County Municipal Utility District 418.

The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND10ND
2020ND10ND
2021ND20ND
2022ND40ND
2023ND40ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 200 ppb

The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.

ppb = parts per billion

All test results

NOTE: Harris County MUD 490 purchases water from Harris County Municipal Utility District 418 which is required to test for dalapon. Sample information shown below was taken by Harris County Municipal Utility District 418.

Date Lab ID Result
2018-03-27AE20263ND
2018-06-26AE31420ND
2019-06-03AE68849ND
2020-06-10AF14769ND
2021-02-01AF41960ND
2021-06-30AF60101ND
2022-06-01AF98993ND
2022-06-01AF99149ND
2022-07-12AG04351ND
2022-10-24AG18130ND
2023-01-26AG26548ND
2023-07-10AG47525ND