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EWG's Tap Water Database — 2021 UPDATE

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1,2-Dichloropropane

Horsham Water&sewer Authority

1,2-Dichloropropane is a volatile carcinogenic solvent discharged from chemical factories and landfills. It also contaminates farmland due to its former use as a soil fumigant. Read More.

The insecticide and fumigant uses of 1,2-dichloropropane were discontinued in the 1980s, but it is still used as an industrial solvent. The California public health goal of 0.5 parts per billion, set to protect against cancer, is 10 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion. 1,2-Dichloropropane can also damage the nervous system, liver, kidneys, and digestive and respiratory systems.

Click here to read more about carcinogenic VOCs.

MORE ABOUT THIS CONTAMINANT

 

106

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND230ND
2015ND240ND
2016ND220ND
2017ND160ND
2018ND80ND
2019ND130ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for 1,2-dichloropropane 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) 5 ppb

The legal limit for 1,2-dichloropropane, 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.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-09AE19948ND
2014-01-09AE19956ND
2014-01-09AE19959ND
2014-01-24AE21287ND
2014-02-19AE24091ND
2014-02-19AE24093ND
2014-02-19AE24094ND
2014-02-19AE24099ND
2014-02-19AE24100ND
2014-02-20AE24092ND
2014-04-16AE29642ND
2014-04-16AE29643ND
2014-04-16AE29635ND
2014-04-16AE29638ND
2014-04-16AE29639ND
2014-07-23AE41288ND
2014-07-23AE41289ND
2014-08-13AE43999ND
2014-08-13AE44001ND
2014-08-13AE44009ND
2014-10-08AE51808ND
2014-10-09AE51797ND
2014-10-09AE51805ND
2015-01-1612286577ND
2015-01-1612286595ND
2015-01-1612286608ND
2015-03-0412514939ND
2015-03-0412514960ND
2015-03-0412514981ND
2015-03-0412515002ND
2015-03-0412515023ND
2015-03-0412515044ND
2015-03-0412515065ND
2015-03-0412515086ND
2015-03-0412515107ND
2015-04-1612632991ND
2015-04-1612633033ND
2015-04-1612633054ND
2015-04-2312633012ND
2015-07-1513012143ND
2015-07-1513012185ND
2015-07-1713012122ND
2015-07-1713012164ND
2015-10-1313388716ND
2015-10-1413388653ND
2015-10-1413388674ND
2015-10-1413388695ND
2016-01-1213752678ND
2016-01-1213752699ND
2016-01-1213752720ND
2016-02-1613869800ND
2016-03-1613985444ND
2016-03-1613985465ND
2016-03-1613985501ND
2016-03-1613985528ND
2016-03-1613985549ND
2016-03-1613985570ND
2016-03-1713985423ND
2016-03-1713985486ND
2016-04-2614102747ND
2016-05-1714250261ND
2016-05-1714250282ND
2016-05-1714250303ND
2016-07-1914569339ND
2016-07-1914569360ND
2016-07-1914569381ND
2016-10-2615075521ND
2016-10-2615075542ND
2016-10-2615075563ND
2017-01-0515517124ND
2017-01-0515517082ND
2017-01-2515517103ND
2017-02-1415655271ND
2017-02-1415655292ND
2017-02-1415655313ND
2017-02-1415655250ND
2017-03-3015795472ND
2017-04-0515936821ND
2017-04-0515936842ND
2017-04-0515936863ND
2017-04-1815936800ND
2017-08-0916565748ND
2017-08-1616565706ND
2017-08-1616565727ND
2017-10-1016880017ND
2018-01-30AF74814ND
2018-01-30AF74813ND
2018-02-13AF75932ND
2018-03-23AF79016ND
2018-06-22AF86999ND
2018-08-30AF94269ND
2018-10-03AF96985ND
2018-12-27AG04620ND
2019-02-11AG07771ND
2019-02-11AG07772ND
2019-02-11AG07773ND
2019-02-11AG07775ND
2019-02-27AG09179ND
2019-04-11AG13046ND
2019-04-11AG13047ND
2019-05-09AG16016ND
2019-05-09AG16019ND
2019-05-23AG16891ND
2019-08-21AG28299ND
2019-09-18AG31924ND
2019-09-18AG31925ND