Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Polychlorinated biphenyls (PCBs)

Town of Gilbert

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.

 

65

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND180ND
2013ND140ND
2014ND20ND
2015ND210ND
2016ND80ND
2017ND20ND

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
2012-02-08PVB0608-01AND
2012-02-09PVB0701-01BND
2012-02-28PVB1867-01DND
2012-03-01PVC0073-01DND
2012-03-15PVC1257-01SND
2012-04-02PVD0064-01SND
2012-04-09PVD0611-01SND
2012-04-18PVD1294-01BND
2012-07-02PVG0068-01CND
2012-07-02PVG0062-01ND
2012-07-02PVG0068-01RE1DND
2012-07-02PVG0062-01RE1SND
2012-07-26PVG1876-01SND
2012-08-28PVH2122-01SND
2012-10-01PVJ0064-01SND
2012-10-01PVJ0070-01SND
2012-10-01PVJ0072-01SND
2012-12-31PVL1787-01ND
2013-01-16PWA1119-01ND
2013-01-17PWA1115-01ND
2013-04-15550-735-1SND
2013-04-24550-1401-1ND
2013-07-01550-5830-1ND
2013-07-30550-7716-1ND
2013-07-31550-7810-1SND
2013-07-31550-7815-1ND
2013-08-26550-9435-1SND
2013-08-27550-9504-1ND
2013-10-23201310230679PND
2013-11-23201311260347PND
2013-11-23201311260349PND
2013-11-26201311260351PND
2014-01-27201401270066PND
2014-10-07201410070504PND
2015-01-13201501130297PND
2015-01-14201501140577PND
2015-01-27201501270263PND
2015-01-28201501280356PND
2015-01-28201501280360PND
2015-02-03201502030358PND
2015-02-05201502050484PND
2015-02-10201502100324PND
2015-02-17201502170339PND
2015-02-18201502108276PND
2015-02-24201502240342PND
2015-02-24201502240346PND
2015-02-24201502240348PND
2015-05-13201505130231PND
2015-07-08201507080265PND
2015-07-21201507220486PND
2015-07-28201507280234PND
2015-08-17201506170183PND
2015-09-10201509100490PND
2015-09-10201509100491PND
2015-09-10201509100492PND
2016-01-05201601070012PND
2016-01-06201601070016PND
2016-01-26201601260359PND
2016-05-13201605310476PND
2016-07-06201607060594PND
2016-07-06201607060612PND
2016-07-20201607200605PND
2016-10-18201610180285PND
2017-01-04201701040825PND
2017-07-27201707280101SND