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EWG's Tap Water Database — 2019 UPDATE

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Fluoride

Marine Corps Base Hawaii

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

Fluoride occurs naturally in surface and groundwater and is also added to drinking water by many water systems. Read More.

Fluoride has been promoted as a chemical that reduces dental cavities. Yet it is now well-established that fluoride primarily exerts its protective effects through topical mechanisms, such as sodium fluoride in toothpaste and mouthwash. In contrast, long-term ingestion of fluoride in water increases dental fluorosis, which includes mottling, pitting and weakening of the teeth. EPA's maximum legal limit is set at 4 parts per million (ppm) to prevent skeletal fluorosis, a condition where bones become brittle and more susceptible to fractures, although these effects may occur at lower doses.

Even fluoride levels of 0.7 ppm, the amount of fluoride in drinking water recommended by the U.S. Public Health Service, can result in too much fluoride for bottle-fed babies. EWG recommends that caregivers mix baby formula with fluoride-free water. The National Toxicology Program is investigating the potential for low doses of fluoride to alter thyroid function and childhood brain development.

 

308

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.00918 ppm508ND - 0.0690 ppm
20130.00590 ppm515ND - 0.0700 ppm
20140.0103 ppm498ND - 0.0730 ppm
20150.00987 ppm559ND - 0.0710 ppm
20160.0112 ppm509ND - 0.0760 ppm
20170.0264 ppm5322ND - 0.0840 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 4 ppm

ppm = parts per million

All test results

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

Date Lab ID Result
2012-02-28201203010150ND
2012-02-28201203010151ND
2012-02-282012030101520.0520 ppm
2012-03-072012030900960.0570 ppm
2012-03-07201203090097ND
2012-03-07201203090098ND
2012-03-072012030900990.0550 ppm
2012-03-072012030901000.0500 ppm
2012-03-12201203130101ND
2012-03-13201203140571ND
2012-03-13201203140602ND
2012-03-13201203140603ND
2012-03-13201203140604ND
2012-03-14201203160156ND
2012-03-14201203160157ND
2012-03-14201203160158ND
2012-03-142012031601770.0550 ppm
2012-03-14201203160178ND
2012-03-202012032102310.0530 ppm
2012-03-27201203280585ND
2012-03-28201203290067ND
2012-03-28201203290068ND
2012-03-28201203290069ND
2012-04-02201204030331ND
2012-04-02201204030332ND
2012-04-03201204040372ND
2012-04-03201204040373ND
2012-04-042012040505340.0690 ppm
2012-04-042012040505350.0680 ppm
2012-04-04201204050536ND
2012-04-09201204110263ND
2012-04-09201204110264ND
2012-04-10201204110656ND
2012-04-11201204120257ND
2012-04-11201204120258ND
2012-04-16201204170142ND
2012-04-17201204180459ND
2012-04-17201204180460ND
2012-04-24201204250263ND
2012-05-01201205030178ND
2012-05-21201205230261ND
2012-05-21201205230262ND
2012-05-22201205240274ND
2012-05-23201205260001ND
2012-05-29201205300591ND
2012-05-29201205300592ND
2012-06-18201206200496ND
2012-06-20201206210297ND
2012-09-19201209250002ND
2012-11-05201211070127ND
2013-03-27201303290135ND
2013-04-17201304190131ND
2013-04-23201304250001ND
2013-05-08201305100443ND
2013-06-04201306050265ND
2013-07-31201308010552ND
2013-08-052013080601520.0550 ppm
2013-10-08201310090427ND
2013-10-21201310220076ND
2013-10-21201310220077ND
2013-10-22201310230533ND
2013-10-22201310230534ND
2013-10-222013102305360.0500 ppm
2013-10-22201310230537ND
2013-10-23201310240478ND
2013-10-23201310240479ND
2013-10-28201310290327ND
2013-10-28201310290328ND
2013-10-29201310300250ND
2013-10-29201310300251ND
2013-10-29201310300252ND
2013-10-29201310300253ND
2013-10-29201310300254ND
2013-10-29201310300255ND
2013-10-30201310310231ND
2013-10-30201310310232ND
2013-10-30201310310233ND
2013-10-30201310310234ND
2013-10-31201311010207ND
2013-10-31201311010208ND
2013-10-31201311010230ND
2013-10-31201311010231ND
2013-11-042013110502690.0700 ppm
2013-11-042013110502700.0700 ppm
2013-11-042013110608710.0560 ppm
2013-11-05201311060814ND
2013-11-05201311060815ND
2013-11-05201311060818ND
2013-11-05201311060819ND
2013-11-06201311090058ND
2013-11-06201311090059ND
2013-11-06201311090060ND
2013-11-06201311090061ND
2013-11-07201311090013ND
2013-11-07201311090014ND
2013-11-13201311140849ND
2013-11-13201311140850ND
2013-11-13201311140856ND
2013-12-02201312041344ND
2013-12-02201312041345ND
2013-12-05201312060204ND
2014-04-03201404040384ND
2014-04-03201404040385ND
2014-04-03201404040386ND
2014-04-032014040403870.0710 ppm
2014-04-032014040403880.0720 ppm
2014-04-03201404040389ND
2014-04-032014040403900.0600 ppm
2014-04-03201404040391ND
2014-04-03201404040392ND
2014-04-03201404040393ND
2014-04-03201404040394ND
2014-04-10201404120292ND
2014-04-102014041202930.0540 ppm
2014-04-102014041202940.0500 ppm
2014-04-10201404120295ND
2014-04-102014041202960.0530 ppm
2014-04-17201404180245ND
2014-04-17201404180246ND
2014-04-17201404180247ND
2014-04-17201404180248ND
2014-04-17201404180249ND
2014-04-17201404180250ND
2014-04-17201404180251ND
2014-04-17201404180252ND
2014-04-17201404180253ND
2014-04-17201404180254ND
2014-04-21201404220329ND
2014-04-21201404220330ND
2014-04-21201404220331ND
2014-04-22201404230610ND
2014-04-22201404230611ND
2014-04-22201404230612ND
2014-04-22201404230613ND
2014-04-23201404240254ND
2014-04-23201404240255ND
2014-04-23201404240256ND
2014-04-23201404240257ND
2014-04-24201404250325ND
2014-04-24201404250326ND
2014-04-24201404250327ND
2014-04-24201404250328ND
2014-04-24201404250329ND
2014-04-28201404290638ND
2014-04-28201404290639ND
2014-04-29201404300628ND
2014-04-29201404300629ND
2014-05-072014050803770.0700 ppm
2014-07-222014072306700.0730 ppm
2014-08-20201408220169ND
2015-02-09201502110395ND
2015-02-10201502120276ND
2015-04-072015040804500.0510 ppm
2015-04-07201504080451ND
2015-04-08201504090111ND
2015-04-08201504090112ND
2015-04-13201504140136ND
2015-04-13201504140137ND
2015-04-14201504150251ND
2015-04-15201504160351ND
2015-04-15201504160352ND
2015-04-15201504160358ND
2015-04-15201504160359ND
2015-04-15201504160360ND
2015-04-16201504170065ND
2015-04-16201504170068ND
2015-04-20201504210281ND
2015-04-20201504210282ND
2015-04-20201504210283ND
2015-04-212015042202410.0710 ppm
2015-04-212015042202420.0540 ppm
2015-04-212015042202430.0700 ppm
2015-04-21201504220244ND
2015-04-212015042202450.0570 ppm
2015-04-22201504230303ND
2015-04-22201504230304ND
2015-04-27201504280099ND
2015-04-27201504280100ND
2015-04-28201504290318ND
2015-04-28201504290319ND
2015-04-28201504290320ND
2015-04-28201504290321ND
2015-04-28201504290322ND
2015-04-28201504290338ND
2015-04-28201504290339ND
2015-04-29201504300056ND
2015-04-29201504300057ND
2015-04-30201505010074ND
2015-05-04201505050069ND
2015-05-052015050601110.0550 ppm
2015-05-05201505060137ND
2015-05-052015050601410.0510 ppm
2015-05-05201505060143ND
2015-05-05201505060144ND
2015-05-06201505070239ND
2015-05-06201505070240ND
2015-05-06201505070241ND
2015-05-11201505120636ND
2015-05-11201505120637ND
2015-05-12201505130586ND
2015-05-18201505190239ND
2015-05-27201505290083ND
2015-08-192015082004810.0660 ppm
2015-10-19201510140073ND
2015-12-292015123002170.0680 ppm
2016-02-10ND
2016-04-060.0540 ppm
2016-04-070.0680 ppm
2016-04-070.0590 ppm
2016-04-07ND
2016-04-07ND
2016-04-120.0760 ppm
2016-04-120.0760 ppm
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-13ND
2016-04-13ND
2016-04-130.0560 ppm
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-140.0520 ppm
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-18ND
2016-04-18ND
2016-04-18ND
2016-04-19ND
2016-04-19ND
2016-04-20ND
2016-04-20ND
2016-04-21ND
2016-04-21ND
2016-04-21ND
2016-04-21ND
2016-04-25ND
2016-04-26ND
2016-04-260.0510 ppm
2016-05-02ND
2016-05-04ND
2016-05-04ND
2016-05-04ND
2016-05-05ND
2016-06-20ND
2016-06-20ND
2016-07-070.0690 ppm
2016-10-28ND
2017-02-140.0730 ppm
2017-04-03ND
2017-04-030.0510 ppm
2017-04-050.0580 ppm
2017-04-050.0570 ppm
2017-04-120.0650 ppm
2017-04-12ND
2017-04-120.0590 ppm
2017-04-120.0500 ppm
2017-04-18ND
2017-04-18ND
2017-04-19ND
2017-04-19ND
2017-04-20ND
2017-04-200.0780 ppm
2017-04-200.0840 ppm
2017-04-200.0830 ppm
2017-04-20ND
2017-04-20ND
2017-04-20ND
2017-04-270.0710 ppm
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-030.0590 ppm
2017-05-04ND
2017-05-040.0800 ppm
2017-05-040.0730 ppm
2017-05-04ND
2017-05-04ND
2017-05-10ND
2017-05-10ND
2017-05-100.0570 ppm
2017-05-11ND
2017-05-110.0690 ppm
2017-05-110.0620 ppm
2017-05-17ND
2017-05-17ND
2017-05-180.0520 ppm
2017-05-22ND
2017-05-23ND
2017-05-230.0520 ppm
2017-05-23ND
2017-05-230.0550 ppm
2017-05-23ND
2017-05-24ND
2017-05-25ND
2017-05-310.0570 ppm
2017-06-05ND
2017-06-07ND
2017-06-08ND
2017-06-140.0540 ppm
2017-11-07ND