Know Your Environment. Protect Your Health.

Pentachlorophenol

The Mountain Water System

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

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND20ND
2020ND30ND
2021ND30ND
20220.0387 ppb32ND - 0.0580 ppb
2023ND30ND

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
2019-02-26680-165148-1ND
2019-02-26680-165152-1ND
2020-03-18481645ND
2020-09-02497125ND
2020-12-15506069ND
2021-03-161034274-01ND
2021-05-111053573-01ND
2021-08-181085286-01ND
2022-09-20FWH0472-01ND
2022-09-20FWJ01740.0580 ppb
2022-12-13FWJ0174-010.0580 ppb
2023-02-16FXB0443-01ND
2023-04-05FXC0477ND
2023-08-03FXF0558ND