Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Polychlorinated biphenyls (PCBs)

City of Mesa

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.

 

101

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND630ND
2013ND50ND
2014ND20ND
2015ND290ND
2016ND20ND
2017N/A00N/A

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
2012-01-11201201110239PND
2012-01-11201201110240PND
2012-01-112012011110241PND
2012-01-11201201120251PND
2012-01-12201201120255PND
2012-01-12201201120256PND
2012-01-12201201120257PND
2012-01-12201201120259PND
2012-01-1220120112058PND
2012-01-18201201180247PND
2012-01-18201201180248PND
2012-01-18201201180249PND
2012-01-18201201180250PND
2012-01-19201201190190PND
2012-01-19201201190191PND
2012-01-19201201190192PND
2012-01-23201201230037PND
2012-01-23201201230038PND
2012-01-23201201230039PND
2012-01-23201201230040PND
2012-01-24201201240277PND
2012-01-24201201240278PND
2012-01-24201201240279PND
2012-01-24201201240280PND
2012-03-06201203070318PND
2012-03-07201203070322PND
2012-04-09201204090008PND
2012-04-09201205070059PND
2012-04-16201204160112PND
2012-04-17201204170458ND
2012-04-17201204170459PND
2012-05-08201205080126PND
2012-08-06201208060115PND
2012-08-06201208060116PND
2012-08-06201208060117PND
2012-08-07201208070366PND
2012-08-07201208070367PND
2012-08-08201208080563PND
2012-08-08201208080564PND
2012-08-08201208080565PND
2012-08-13201208130183PND
2012-08-13201208130184PND
2012-08-13201208130185PND
2012-08-14201208140227PND
2012-08-14201208140228PND
2012-08-14201208140229PND
2012-08-15201208150501PND
2012-08-15201208150502PND
2012-08-15201208150503PND
2012-08-22201208220599PND
2012-08-22201208220600PND
2012-08-22201208220601PND
2012-08-27201208270027PND
2012-08-27201208270028PND
2012-08-27201208270029PND
2012-08-28201208280357PND
2012-08-28201208280358PND
2012-09-24201209240094PND
2012-10-01201210010105PND
2012-11-19201211190081PND
2012-11-19201211190082PND
2012-11-19201211190083PND
2012-11-20201211200157PND
2013-03-05201303050107PND
2013-03-05201303050108PND
2013-05-09201305100036PND
2013-07-16201307170487PND
2013-10-15201310150513PND
2014-02-12201402120615PND
2014-04-14201404140044SND
2015-02-04201502050419PND
2015-02-04201502050428PND
2015-02-09201502090089PND
2015-02-09201502090114PND
2015-02-09201502090116PND
2015-02-11201502120371PND
2015-04-01201504010555PND
2015-04-07201504070448PND
2015-04-07201504080338PND
2015-04-07201504080340PND
2015-04-14201504150237PND
2015-04-14201504150242PND
2015-04-21201504220401PND
2015-04-21201504220403PND
2015-04-29201504290425PND
2015-07-07201507070352PND
2015-07-07201507070354PND
2015-07-14201507150044PND
2015-07-21201507210313PND
2015-07-21201507210315PND
2015-10-06201510060338PND
2015-10-06201510060339PND
2015-10-06201510060340PND
2015-10-12201510130288PND
2015-10-12201510130289PND
2015-10-14201510150131PND
2015-10-19201510200133PND
2015-10-21201510220130PND
2015-10-21201510220131PND
2016-06-08201606090223PND
2016-10-17201610180304PND