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EWG's Tap Water Database — 2019 UPDATE

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Polychlorinated biphenyls (PCBs)

Prescott Valley WD Upper

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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND140ND
2014N/A00N/A
2015N/A00N/A
2016ND200ND
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
2012-03-15201203160214PND
2012-07-25201207260390PND
2012-11-262111802-01SND
2013-02-14201302150323PND
2013-02-14201302150325PND
2013-02-14201302150327PND
2013-02-14201302150329PND
2013-02-14201302150330PND
2013-02-14201302150331PND
2013-02-14201302150332PND
2013-07-25201307250251PND
2013-07-25201307250257PND
2013-07-25201307250256PND
2013-07-25201307250255PND
2013-07-25201307250254PND
2013-07-25201307250253PND
2013-07-25201307250252PND
2016-02-09201602100057PND
2016-02-09201602100056PND
2016-02-09201602100055PND
2016-02-10201602110029PND
2016-02-10201602110030PND
2016-02-10201602110031PND
2016-02-10201602110032PND
2016-02-10201602110033PND
2016-02-10201602110034PND
2016-02-10201602110035PND
2016-08-03201608040051PND
2016-08-03201608040054PND
2016-08-03201608040053PND
2016-08-03201608040052PND
2016-08-03201608040050PND
2016-08-04201608050120PND
2016-08-04201608050121PND
2016-08-04201608050122PND
2016-08-04201608050123PND
2016-08-04201608050124PND