The Power of Information

National Drinking Water Database


Methyl ethyl ketone in California


Methyl ethyl ketone is a synthetic chemical used as a solvent for paints, coatings, adhesives, printing inks, and other industrial and consumer goods; it occurs naturally in some vegetation and forms during ozonation of drinking water.

The Most Polluted Communities in California

29 water utilities reported detecting Methyl ethyl ketone in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Methyl ethyl ketone level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Covelo Mobile Home Park
Covelo, CA
751 of 149 ppb
(49 ppb)
2Ramona Water Company
Anza, CA
2501 of 135 ppb
(35 ppb)
3Seafair Road and Water Company
Mendocino, CA
501 of 616.5 ppb
(0 to 99 ppb)
4Wallace Community Services District
Wallace, CA
2001 of 12.3 ppb
(2.3 ppb)
5Central Coast Water Authority
Buellton, CA
01 of 32.13 ppb
(0 to 6.4 ppb)
6Brooktrails Township Csd
Willits, CA
4,0001 of 11.9 ppb
(1.9 ppb)
7River Pines Pud
River Pines, CA
5001 of 31.43 ppb
(0 to 4.3 ppb)
8City of Modesto, DE Hillcrest
Modesto, CA
1,2001 of 21.43 ppb
(0 to 2.85 ppb)
9Soquel Creek Water District
Soquel, CA
45,0001 of 150.43 ppb
(0 to 6.4 ppb)
10Lower Lake County Water District
Lower Lake, CA
2,0251 of 50.3 ppb
(0 to 1.5 ppb)

Health Based Limits for Methyl ethyl ketone

StandardDescriptionLevel
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.4000 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.4000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.7500 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.20000 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.75000 ppb

Violation Summary for Methyl ethyl ketone in California

There are no violations reported for this contaminant in California