Know Your Environment. Protect Your Health.

Pentachlorophenol

Western Hills Water System

Pentachlorophenol is a carcinogenic chemical used as a wood preservative. It harms developing fetuses, and causes immune suppression and hormone disruption.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.3 ppb

The EWG Health Guideline of 0.3 ppb for pentachlorophenol 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 cancer.

EPA Maximum Contaminant
Level (MCL): 1 ppb

The legal limit for pentachlorophenol, established in 1991, was based on analytical detection limits at the time that the standard was set.

ppb = parts per billion

All test results

Date Lab ID Result
2018-09-18AE40838ND
2019-06-17AE71195ND
2020-06-15AF15249ND
2020-06-15AF15250ND
2020-06-15AF15251ND
2020-06-15AF15252ND
2021-08-03AF64550ND
2022-10-04AG15960ND
2023-07-12AG48286ND
2023-07-12AG48287ND
2023-07-12AG48288ND
2023-07-12AG48289ND