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EWG's Tap Water Database — 2019 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.

2015-2017:

FOUND

2

states detected

52

utilities detected

2.7 million

people served

States reporting tert-butyl alcohol in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California462,681,174
New Hampshire6944
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, 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Peu/farmstead AcresMerrimack, NH1 of 122.0 ppb95
Longwoods Mobile Home ParkSeabrook, NH1 of 111.0 ppb245
Glen Ridge DevMerrimack, NH1 of 28.50 ppb253
Peu/pinehaven Water TrustMerrimack, NH1 of 38.00 ppb88
Peu/ministerial HillsMerrimack, NH1 of 37.67 ppb163
Villages At Chester CondosNashua, NH1 of 37.67 ppb100
Kern County Water Agency*Bakersfield, CA4 of 95.89 ppb0
Bishop, City OfBishop, CA2 of 22.85 ppb3,879
Cutler Public Utility DistrictCutler, CA1 of 32.57 ppb6,200
Trailer Haven Mobile Home ParkSan Leandro, CA1 of 12.20 ppb240
Rincon Del Diablo MWD(ID-1)Escondido, CA1 of 32.17 ppb24,545
Vallecitos Water DistrictSan Marcos, CA1 of 32.17 ppb94,871
City of CarlsbadCarlsbad, CA1 of 32.17 ppb84,838
Rainbow Municipal WDFallbrook, CA1 of 32.17 ppb19,611
Ramona Municipal WDRamona, CA1 of 32.17 ppb40,000
Valley Center MWD*Valley Center, CA1 of 32.17 ppb25,450
San Diego County Water Authority*Escondido, CA1 of 32.17 ppb0
Sierra Highland Community Services DistrictBishop, CA1 of 22.15 ppb530
El Dorado Mutual Water CompanyPalmdale, CA1 of 12.10 ppb648
Yuima Municipal Water District IdaPauma Valley, CA1 of 12.00 ppb400
Nevada Id - Lake WildwoodGrass Valley, CA2 of 41.68 ppb7,090
Nevada ID - Loma RicaGrass Valley, CA1 of 31.40 ppb11,778
Sierra Cedars Community Services DistrictClovis, CA1 of 21.30 ppb875
Esparto Community Services DistrictEsparto, CA1 of 31.27 ppb2,600
Fair Oaks Water DistrictFair Oaks, CA1 of 21.10 ppb40,000
Nevada Id - North AuburnGrass Valley, CA1 of 30.733 ppb6,410
Woodland-davis Clean Water AgencyDavis, CA1 of 70.314 ppb0
City of Fresno*Fresno, CA26 of 9570.287 ppb522,352
Fcsa #39 A&bFresno, CA26 of 9570.287 ppb465
City of LivingstonLivingston, CA1 of 90.267 ppb14,894
City of Davis*Davis, CA1 of 310.174 ppb67,298
Florin County Water DistrictSacramento, CA1 of 170.147 ppb7,652
Fruitridge Vista Water CompanySacramento, CA2 of 450.136 ppb15,000
Carmichael Water DistrictCarmichael, CA1 of 490.127 ppb40,000
City of Clovis*Clovis, CA1 of 510.0667 ppb103,871
Broadview Terrace Mutual Water CompanyOakhurst, CA1 of 460.0587 ppb510
Hillview Water Company-oakhurst/sierra Lakes*Oakhurst, CA1 of 460.0587 ppb2,805
City of GilroyGilroy, CA1 of 1090.0330 ppb39,050
California American Water Company - MontereyMonterey, CA1 of 820.0280 ppb96,754

* 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
Vallecitos Water DistrictSan Marcos, CA1 of 32.17 ppb94,871
Rainbow Municipal WDFallbrook, CA1 of 32.17 ppb19,611
Rincon Del Diablo MWD(ID-1)Escondido, CA1 of 32.17 ppb24,545
Ramona Municipal WDRamona, CA1 of 32.17 ppb40,000
Valley Center MWD*Valley Center, CA1 of 32.17 ppb25,450
City of CarlsbadCarlsbad, CA1 of 32.17 ppb84,838
Nevada ID - Loma RicaGrass Valley, CA1 of 31.40 ppb11,778
Fair Oaks Water DistrictFair Oaks, CA1 of 21.10 ppb40,000
City of Fresno*Fresno, CA26 of 9570.287 ppb522,352
City of LivingstonLivingston, CA1 of 90.267 ppb14,894
City of Davis*Davis, CA1 of 310.174 ppb67,298
Fruitridge Vista Water CompanySacramento, CA2 of 450.136 ppb15,000
Carmichael Water DistrictCarmichael, CA1 of 490.127 ppb40,000
City of Clovis*Clovis, CA1 of 510.0667 ppb103,871
City of GilroyGilroy, CA1 of 1090.0330 ppb39,050
California American Water Company - MontereyMonterey, CA1 of 820.0280 ppb96,754

* 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.