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EWG's Tap Water Database — 2021 UPDATE

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Uranium

Winslow Township DMU

Uranium is a known human carcinogen. The federal legal limit for uranium is set at 30 micrograms per liter (corresponding to parts per billion), but utilities can also report uranium in picocuries per liter (pCi/L), which is a measure of radioactivity in water. EWG translated all uranium results to pCi/L using a conversion factor developed by the EPA. With this conversion approach, the limit of 30 ppb corresponds to 20 pCi/L. Drinking water with this much uranium would cause more than 4.6 cancer cases in a population of 100,000. California set a public health goal for uranium of 0.43 pCi/L. Read More.

Multiple forms of uranium can be detected in water, including uranium-234, uranium-235 and uranium-238. Uranium-234 is the most toxic form of uranium for human health.

MORE ABOUT THIS CONTAMINANT

 

75

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND140ND
2015ND110ND
2016ND120ND
2017ND140ND
2018ND120ND
2019ND120ND

pCi/L = picocuries per liter

State and national drinking water standards and health guidelines

EWG Health Guideline 0.43 pCi/L

The EWG Health Guideline of 0.43 pCi/L for uranium 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. Three most common uranium isotopes are U-234, U-235 and U-238. All isotopes of uranium are radioactive, and the total radioactivity depends on the ratio of isotopes. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 20 pCi/L

pCi/L = picocuries per liter

All test results

Date Lab ID Result
2014-01-2840126ND
2014-01-2840125-2ND
2014-02-1040172-2ND
2014-02-2540222ND
2014-02-2540223-2ND
2014-04-0140356-2ND
2014-04-2240469-2ND
2014-05-2240599-2ND
2014-07-0140747-2ND
2014-07-0140746-2ND
2014-08-1240950-2ND
2014-10-0141160-2ND
2014-10-0141159-2ND
2014-10-1641242-2ND
2015-01-0541569ND
2015-01-0541570ND
2015-02-1141730-2ND
2015-04-0141909-2ND
2015-04-0141910-2ND
2015-07-0642565-2ND
2015-07-0642566-2ND
2015-08-0542670-2ND
2015-10-0630161709001ND
2015-10-0630161706001ND
2015-10-0630161704001ND
2016-01-0530170091001ND
2016-01-0530170093001ND
2016-01-0530170095001ND
2016-04-0430179151001ND
2016-04-0430179148001ND
2016-04-0430179146002ND
2016-07-0530189155001ND
2016-07-0530189159001ND
2016-07-0530189158001ND
2016-10-03381610744ND
2016-10-03381610740ND
2016-10-03381610736ND
2017-01-04381700118ND
2017-01-04381700105ND
2017-01-04381700110ND
2017-01-04381700124ND
2017-01-04381700126ND
2017-04-06781700621ND
2017-04-06781700619ND
2017-04-06781700617ND
2017-07-26781702361ND
2017-07-26781702357ND
2017-07-26781702359ND
2017-10-04781703497ND
2017-10-04781703493ND
2017-10-04781703495ND
2018-01-10781800107ND
2018-01-10781800105ND
2018-01-10781800109ND
2018-04-02781801449ND
2018-04-02781801447ND
2018-04-02781801445ND
2018-07-05781803183ND
2018-07-05781803179ND
2018-07-05781803181ND
2018-10-03011808256ND
2018-10-03011808259ND
2018-10-03011808261ND
2019-01-03011900096ND
2019-01-03011900099ND
2019-01-03011900101ND
2019-04-04011903863-0002ND
2019-04-04011903862-0002ND
2019-04-04011903861-0002ND
2019-07-01011908122-0002ND
2019-07-01011908116-0002ND
2019-07-01011908121-0002ND
2019-10-01011912428-0001ND
2019-10-01011912424-0001ND
2019-10-01011912445-0001ND