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EWG's Tap Water Database — 2019 UPDATE

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Uranium

Marine Corps Base Hawaii

NOTE: Marine Corps Base Hawaii purchases water from Honolulu-Windward-Pearl Harbor which is required to test for uranium. Sample information shown below was taken by Honolulu-Windward-Pearl Harbor.

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.

 

89

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
20130.02 pCi/L611ND - 1.40 pCi/L
2014ND60ND
2015ND90ND
2016ND40ND
2017ND40ND

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

NOTE: Marine Corps Base Hawaii purchases water from Honolulu-Windward-Pearl Harbor which is required to test for uranium. Sample information shown below was taken by Honolulu-Windward-Pearl Harbor.

Date Lab ID Result
2012-03-28201204020020ND
2012-05-22201205240274ND
2012-08-06201208080477ND
2012-11-05201211070127ND
2012-11-20201211230301ND
2013-01-22201301250222ND
2013-01-22201301250223ND
2013-01-23201301250337ND
2013-01-23201301250336ND
2013-01-23201301250338ND
2013-01-28201301300278ND
2013-01-28201301300279ND
2013-01-29201301310279ND
2013-01-29201301310280ND
2013-01-29201301310281ND
2013-01-29201301310282ND
2013-01-30201302010147ND
2013-01-30201302010148ND
2013-01-30201302010149ND
2013-01-30201302010150ND
2013-01-30201302010145ND
2013-01-30201302010144ND
2013-02-04201302060256ND
2013-02-04201302060257ND
2013-02-04201302060253ND
2013-02-04201302060254ND
2013-02-05201302070307ND
2013-02-05201302070306ND
2013-02-05201302070304ND
2013-02-05201302070305ND
2013-02-06201302090246ND
2013-02-06201302090247ND
2013-02-06201302090243ND
2013-02-06201302090265ND
2013-02-06201302090242ND
2013-02-11201302140228ND
2013-02-11201302140229ND
2013-02-13201302150527ND
2013-02-19201302210752ND
2013-02-20201302230026ND
2013-02-20201302230012ND
2013-02-20201302230011ND
2013-02-25201302280066ND
2013-02-26201303010007ND
2013-02-27201303020216ND
2013-02-27201303020215ND
2013-03-06201303090039ND
2013-03-12201303150138ND
2013-03-18201303200216ND
2013-03-19201303210132ND
2013-03-19201303210133ND
2013-03-21201303250076ND
2013-03-27201303290320ND
2013-04-17201304190394ND
2013-04-23201304250517ND
2013-05-08201305100445ND
2013-06-04201306060273ND
2013-07-10201307130048ND
2013-07-31201308020180ND
2013-08-05201308071008ND
2013-08-12201308150011ND
2013-08-13201308160184ND
2013-08-142013081701041.40 pCi/L
2013-11-04201311060872ND
2013-11-06201311090062ND
2013-11-12201311140801ND
2014-01-17201401220230ND
2014-01-29201401310162ND
2014-02-19201402210438ND
2014-04-04201404080620ND
2014-04-07201404090485ND
2014-05-06201405080376ND
2015-02-09201502110395ND
2015-02-10201502120276ND
2015-05-04201505060108ND
2015-05-27201505290083ND
2015-08-12201508050470ND
2015-08-18201508200479ND
2015-10-06201510080305ND
2015-10-19201510140073ND
2015-12-28201512180363ND
2016-01-13ND
2016-02-09ND
2016-05-02ND
2016-10-28ND
2017-02-14ND
2017-04-03ND
2017-04-03ND
2017-05-22ND