Know Your Environment. Protect Your Health.

Dalapon

Patterson Water System

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

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
20191.25 ppb84ND - 3.10 ppb
2020ND40ND
2021ND20ND
20220.285 ppb21ND - 0.570 ppb
20230.270 ppb21ND - 0.540 ppb

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

Date Lab ID Result
2018-01-2535370415002ND
2018-01-2535370415002ND
2018-07-0935403035001ND
2018-07-0935403035001ND
2019-01-1535442674001ND
2019-01-1535442674001ND
2019-07-0935480730001ND
2019-07-0935480730001ND
2019-07-24354848560011.90 ppb
2019-07-24354848560011.90 ppb
2019-10-22355073440013.10 ppb
2019-10-22355073440013.10 ppb
2020-01-0735522572001ND
2020-01-0735522572002ND
2020-04-1435544199001ND
2020-09-2835581278001ND
2021-03-2535621782001ND
2021-11-3035681445001ND
2022-01-0635688920001ND
2022-07-28357355060010.570 ppb
2023-09-2735830712001ND
2023-10-09358333830010.540 ppb