Know Your Environment. Protect Your Health.

4,4'-dde

Nob Hill Water Association

 

7

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023ND30ND

ppb = parts per billion

All test results

Date Lab ID Result
2018-06-06ND
2018-06-06ND
2019-05-14ND
2019-05-14ND
2023-06-064527330ND
2023-06-064468549ND
2023-06-064468551ND