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EWG's Tap Water Database — 2021 UPDATE

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tert-Butyl alcohol

Status: No national drinking water standard exists

 

tert-Butyl alcohol is an industrial chemical and a gasoline additive. It can also form as a breakdown product of the common drinking water contaminant MTBE.

2017-2019:

FOUND

3

states detected

44

utilities detected

2.5 million

people served

States reporting tert-butyl alcohol in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California352,449,868
Massachusetts11,650
New Hampshire8976
MORE
LESS

Filtering technologies that reduce tert-butyl alcohol

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Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of tert-butyl alcohol, 2017-2019

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Newfound Acres Mobile Home ParkBedford, NH1 of 618.2 ppb26
Longwoods Mobile Home ParkSeabrook, NH3 of 312.3 ppb245
Peu/farmstead AcresMerrimack, NH1 of 211.0 ppb95
Mansfield WoodsLunenburg, NH1 of 79.71 ppb6
Yosemite Westlake Mobile EstatesGreeley Hill, CA1 of 27.85 ppb75
Lakeside Park AssociationZephyr Cove, CA1 of 17.20 ppb1,000
Peu/pinehaven Water TrustMerrimack, NH1 of 46.00 ppb88
Peu/ministerial HillsMerrimack, NH1 of 45.75 ppb163
Glen Ridge DevMerrimack, NH1 of 35.67 ppb253
Kern County Water Agency*Bakersfield, CA7 of 174.70 ppb0
Villages At Chester CondosMerrimack, NH1 of 63.83 ppb100
Bishop, City OfBishop, CA2 of 22.85 ppb3,879
Garlen Court WsSalinas, CA1 of 21.90 ppb69
Cutler Public Utility DistrictCutler, CA1 of 51.54 ppb6,200
Rancho Borromeo MwsPrunedale, CA1 of 21.50 ppb100
Bakman Water CompanyFresno, CA2 of 61.48 ppb8,866
Sierra Highland Community Services DistrictBishop, CA1 of 31.43 ppb530
Rubidoux Community SDRubidoux, CA3 of 391.28 ppb26,150
Trailer Haven Mobile Home ParkSan Leandro, CA1 of 21.10 ppb240
San Diego County Water Authority*Escondido, CA1 of 61.08 ppb0
Valley Center MWD*Valley Center, CA1 of 61.08 ppb25,450
Ramona Municipal WDRamona, CA1 of 61.08 ppb40,000
Rincon Del Diablo MWD(ID-1)Escondido, CA1 of 61.08 ppb24,545
Rainbow Municipal WDFallbrook, CA1 of 61.08 ppb19,611
City of CarlsbadCarlsbad, CA1 of 61.08 ppb84,838
Vallecitos Water DistrictSan Marcos, CA1 of 61.08 ppb94,871
El Dorado Mutual Water CompanyPalmdale, CA1 of 21.05 ppb648
Yuima Municipal Water District IdaPauma Valley, CA1 of 21.000 ppb400
Harvard Water DepartmentHarvard, MA1 of 130.923 ppb1,650
Sierra Cedars Community Services DistrictClovis, CA1 of 30.867 ppb875
San Miguel Ws #01Royal Oaks, CA1 of 30.800 ppb100
City Of CorningCorning, CA1 of 90.756 ppb7,663
Nevada ID - Loma RicaGrass Valley, CA1 of 60.700 ppb11,778
Plumas LakeOlivehurst, CA1 of 40.700 ppb6,600
Pleasant ValleyPahrump, NV1 of 40.625 ppb110
Nevada Id - Lake WildwoodGrass Valley, CA1 of 60.617 ppb7,090
Esparto Community Services DistrictEsparto, CA1 of 80.475 ppb2,600
Nevada Id - North AuburnGrass Valley, CA1 of 60.367 ppb6,410
Fair Oaks Water DistrictFair Oaks, CA1 of 80.275 ppb40,000
Woodland-davis Clean Water AgencyDavis, CA1 of 120.183 ppb0
Fcsa #39 A&bFresno, CA28 of 1,8320.153 ppb465
City of Fresno*Fresno, CA28 of 1,8320.153 ppb522,352
City of LivingstonLivingston, CA1 of 160.150 ppb14,894
California Water Service Company - DominguezSan Jose, CA1 of 360.0889 ppb142,111
City of Davis*Davis, CA1 of 610.0885 ppb67,298
Florin County Water DistrictSacramento, CA1 of 310.0806 ppb7,652
Carmichael Water DistrictCarmichael, CA1 of 850.0729 ppb40,000
Fruitridge Vista Water CompanySacramento, CA2 of 970.0629 ppb15,000
City of ClovisClovis, CA1 of 1110.0306 ppb103,871
Hillview Water Company-oakhurst/sierra Lakes*Oakhurst, CA1 of 930.0290 ppb2,805

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report tert-Butyl alcohol, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Rubidoux Community SDRubidoux, CA3 of 391.28 ppb26,150
Valley Center MWD*Valley Center, CA1 of 61.08 ppb25,450
Ramona Municipal WDRamona, CA1 of 61.08 ppb40,000
Rincon Del Diablo MWD(ID-1)Escondido, CA1 of 61.08 ppb24,545
Rainbow Municipal WDFallbrook, CA1 of 61.08 ppb19,611
City of CarlsbadCarlsbad, CA1 of 61.08 ppb84,838
Vallecitos Water DistrictSan Marcos, CA1 of 61.08 ppb94,871
Nevada ID - Loma RicaGrass Valley, CA1 of 60.700 ppb11,778
Fair Oaks Water DistrictFair Oaks, CA1 of 80.275 ppb40,000
City of Fresno*Fresno, CA28 of 1,8320.153 ppb522,352
City of LivingstonLivingston, CA1 of 160.150 ppb14,894
California Water Service Company - DominguezSan Jose, CA1 of 360.0889 ppb142,111
City of Davis*Davis, CA1 of 610.0885 ppb67,298
Carmichael Water DistrictCarmichael, CA1 of 850.0729 ppb40,000
Fruitridge Vista Water CompanySacramento, CA2 of 970.0629 ppb15,000
City of ClovisClovis, CA1 of 1110.0306 ppb103,871
City of GilroyGilroy, CA1 of 1460.0247 ppb39,050
Irvine Ranch Water District*Irvine, CA1 of 2790.00789 ppb370,000
Santa MonicaSanta Monica, CA2 of 1,2610.00460 ppb92,185

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report tert-Butyl alcohol, but it likely has the contaminant in its water supply.