Hexachlorocyclopentadiene
CTWC - Unionville System
Hexachlorocyclopentadiene was historically used for the manufacture of currently banned pesticides, such as endrin, dieldrin and chlordane. It’s still used for production of flame retardants, resins and plastics.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 8 | 0 | ND |
2015 | ND | 4 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 4 | 0 | ND |
2018 | N/A | 0 | 0 | N/A |
2019 | ND | 12 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 2 ppb
The EWG 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.
EPA Maximum Contaminant
Level (MCL) 50 ppb
The legal limit for hexachlorocyclopentadiene, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-01-21 | BG01716SOC5 | ND |
2014-01-21 | BG01717SOC5 | ND |
2014-01-21 | BG01713SOC5 | ND |
2014-01-22 | BG01714SOC5 | ND |
2014-01-22 | BG01715SOC5 | ND |
2014-01-22 | BG01718SOC5 | ND |
2014-01-22 | BG01719SOC5 | ND |
2014-02-14 | BG09385SOC5 | ND |
2015-03-03 | 3199324 | ND |
2015-06-03 | 3254573 | ND |
2015-07-13 | BJ46102SOC5 | ND |
2015-07-15 | BJ46999SOC5 | ND |
2017-08-29 | BY91937SOC5 | ND |
2017-08-29 | BY91939SOC5 | ND |
2017-08-29 | BY91938SOC5 | ND |
2017-11-21 | BZ45452SOC5 | ND |
2019-09-17 | SOC 200549386 | ND |
2019-09-17 | SOC 200549392 | ND |
2019-09-25 | SOC 200550426 | ND |
2019-09-25 | SOC 200550428 | ND |
2019-09-25 | SOC 200550427 | ND |
2019-10-02 | SOC 200551433 | ND |
2019-10-02 | SOC 200551434 | ND |
2019-10-09 | SOC 200552469 | ND |
2019-10-10 | SOC 200552468 | ND |
2019-10-10 | SOC 200552467 | ND |
2019-10-10 | SOC 200552466 | ND |
2019-10-10 | SOC 200552465 | ND |