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Hexachlorocyclopentadiene

Fairview Union Water System

Hexachlorocyclopentadiene was historically used for the manufacture of currently banned pesticides, such as endrin, dieldrin and chlordane. Itís still used for production of flame retardants, resins and plastics.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.0255 ppb42ND - 0.0510 ppb
2011ND40ND
20120.0685 ppb42ND - 0.137 ppb
20130.141 ppb440.136 ppb - 0.145 ppb
2014ND40ND
20150.0645 ppb440.0580 ppb - 0.0710 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 2 ppb

The health guideline of 2 ppb for hexachlorocyclopentadiene 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 harm to the stomach and intestines.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)50.0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-06-07AD398020.0510 ppb
2010-06-07AD398020.0510 ppb
2010-12-281012024-10ND
2010-12-281012024-10ND
2011-05-16AD53431ND
2011-05-16AD53431ND
2011-11-08AD61716ND
2011-11-08AD61716ND
2012-03-19AD644200.137 ppb
2012-03-19AD644200.137 ppb
2012-10-22AD72495ND
2012-10-22AD72495ND
2013-03-25AD763530.145 ppb
2013-03-25AD763530.145 ppb
2013-08-12AD822700.136 ppb
2013-08-12AD822700.136 ppb
2014-04-14AD90605ND
2014-04-14AD90605ND
2014-09-15AD97160ND
2014-09-15AD97160ND
2015-03-09351788830010.0580 ppb
2015-03-09351788830010.0580 ppb
2015-10-12352117030010.0710 ppb
2015-10-12352117030010.0710 ppb