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EWG's Tap Water Database — 2019 UPDATE

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Trichloroethylene

City of Nampa

Trichloroethylene, an industrial solvent and common groundwater pollutant, damages the immune system, harms the developing fetus and causes cancer. Read More.

Trichloroethylene was once commonly used to remove grease from metal parts, such as steel pipes and engines, and as a solvent in dry cleaning and carpet cleaning products. Drinking trichloroethylene-contaminated drinking water has been linked with birth defects, leukemia, and liver and kidney damage. Trichloroethylene is highly volatile and can enter indoor air through water in pipes. If trichloroethylene is present, people can inhale it while bathing, washing dishes and doing other household activities that involve water.

Click here to read more about carcinogenic VOCs.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND50ND
2014N/A00N/A
2015N/A00N/A
2016ND130ND
2017ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.4 ppb

The EWG Health Guideline of 0.4 ppb for trichloroethylene was defined by the state of Minnesota as health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the developing fetus and damage to the immune system.

EPA Maximum Contaminant
Level (MCL) 5 ppb

The legal limit for trichloroethylene, established in 1987, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppb = parts per billion

All test results

Date Lab ID Result
2012-02-29V58591ND
2013-12-04V1351135ND
2013-12-05V1351273ND
2013-12-12V1352283ND
2013-12-19V1353252ND
2013-12-19V1353246ND
2016-04-20V1616221ND
2016-07-20V1632285ND
2016-10-07V1646180ND
2016-11-17V1652977ND
2016-11-17V1652982ND
2016-11-17V1652993ND
2016-11-17V1652971ND
2016-11-17V1652973ND
2016-11-17V1652975ND
2016-11-17V1652985ND
2016-11-17V1652987ND
2016-11-17V1652991ND
2016-11-17V1652995ND
2017-01-31V1703805ND
2017-01-31V1703804ND
2017-04-11V1714411ND
2017-08-09V1735777ND
2017-10-18V1748770ND