Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Polychlorinated biphenyls (PCBs)

Mission Springs WD

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.

 

30

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND200ND
2015N/A00N/A
2016N/A00N/A
2017ND100ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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

Date Lab ID Result
2014-02-043761-014-0830ND
2014-02-043761-011-1048ND
2014-02-043761-026-0920ND
2014-02-043761-025-0950ND
2014-02-043761-008-0750ND
2014-02-113761-013-1015ND
2014-02-113761-010-0730ND
2014-02-113761-015-0830ND
2014-02-113761-017-0950ND
2014-02-113761-030-0910ND
2014-07-073761-014-0911ND
2014-07-073761-026-0825ND
2014-07-083761-015-0849ND
2014-07-083761-010-0747ND
2014-07-083761-008-0817ND
2014-07-083761-030-0922ND
2014-07-093761-025-1118ND
2014-07-093761-017-1051ND
2014-07-093761-013-1035ND
2014-07-093761-011-1203ND
2017-06-013761-013-1108ND
2017-06-013761-015-1246ND
2017-06-053761-026-1200ND
2017-06-053761-014-1130ND
2017-06-063761-025-1300ND
2017-06-063761-017-1100ND
2017-06-063761-011-1200ND
2017-06-063761-010-0945ND
2017-06-073761-030-1200ND
2017-06-073761-008-1124ND