Know Your Environment. Protect Your Health.

Polychlorinated biphenyls (PCBs)

Nash Forreston Water Supply Corporation

NOTE: Nash Forreston Water Supply Corporation purchases water from City of Waxahachie which is required to test for polychlorinated biphenyls (pcbs). Sample information shown below was taken by City of Waxahachie.

PCBs are synthetic chemicals banned in the U.S. since the 1970s because of their toxicity. PCBs contaminate water by leaching from landfills and hazardous waste clean-up sites. PCBs increase the risk of cancer. Read More.

Up until the late 1970s, PCBs were used widely as coolants and lubricants in transformers, capacitors and other electrical equipment. Currently, PCBs are widely detected in the general population. They build up and are stored in fatty tissues and fluids such as breast milk, and can be passed on to fetuses and infants during pregnancy and breast-feeding. In human epidemiological studies, PCBs have been associated with an elevated risk of breast and prostate cancers. Infants and children with higher PCB exposures during development score lower on measures of neurological function, ranging from decreased IQ scores to� reduced hearing sensitivity. PCBs also affect hormones and damage the immune system.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.09 ppb

The EWG Health Guideline of 0.09 ppb for PCBs 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): 0.5 ppb

The legal limit for PCBs, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to PCB exposure.

ppb = parts per billion

All test results

NOTE: Nash Forreston Water Supply Corporation purchases water from City of Waxahachie which is required to test for polychlorinated biphenyls (pcbs). Sample information shown below was taken by City of Waxahachie.

Date Lab ID Result
2018-01-25Q1802982003ND
2018-01-25Q1802982012ND
2019-04-29Q1916965001ND
2019-04-29Q1916965004ND
2020-08-17Q2032738001ND
2020-08-17Q2032738006ND
2021-09-16Q2125453001ND
2021-09-16Q2125453006ND
2022-01-12Q2201052001ND
2022-01-12Q2201052005ND
2023-09-05Q2338122001ND
2023-11-20Q2349758005ND