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EWG's Tap Water Database — 2019 UPDATE

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Caffeine

Status: No national drinking water standard exists

 

Caffeine, from coffee and other beverages, is a key indicator of water contamination from wastewater effluent.

2015-2017:

FOUND

2

states detected

21

utilities detected

2.7 million

people served

States reporting caffeine in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
Virginia21,289,422
California16784,961
District Of Columbia3648,882
MORE
LESS

Filtering technologies that reduce caffeine

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Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of caffeine, 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Monterey Park Water DepartmentMonterey Park, CA1 of 40.0700 ppb62,183
Washington Aqueduct Division*Washington, DC1 of 260.0308 ppb0
D.C. Water and Sewer Authority*Washington, DC1 of 260.0308 ppb632,323
Arlington County*Arlington, VA1 of 260.0308 ppb215,000
Elsinore Valley Municipal Water District*Lake Elsinore, CA1 of 20.0290 ppb142,264
Olivenhain Municipal Water DistrictEncinitas, CA1 of 30.0187 ppb63,000
Castaic Lake Water Agency*Santa Clarita, CA1 of 110.00546 ppb0
Cal-water Service Company - ChicoChico, CA1 of 130.00523 ppb100,435
Sacramento Suburban Water District*Sacramento, CA1 of 390.00133 ppb171,200

* 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 Caffeine, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Monterey Park Water DepartmentMonterey Park, CA1 of 40.0700 ppb62,183
D.C. Water and Sewer Authority*Washington, DC1 of 260.0308 ppb632,323
Arlington County*Arlington, VA1 of 260.0308 ppb215,000
Elsinore Valley Municipal Water District*Lake Elsinore, CA1 of 20.0290 ppb142,264
Olivenhain Municipal Water DistrictEncinitas, CA1 of 30.0187 ppb63,000
Cal-water Service Company - ChicoChico, CA1 of 130.00523 ppb100,435
Sacramento Suburban Water District*Sacramento, CA1 of 390.00133 ppb171,200

* 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 Caffeine, but it likely has the contaminant in its water supply.