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National Drinking Water Database


Isopropylbenzene in California


Isopropylbenzene is an intermediate in industrial chemical production, and is also used as a thinner for paints and enamels and a component of fuel; it is released from petroleum refining, evaporation and combustion.

The Most Polluted Communities in California

7 water utilities reported detecting Isopropylbenzene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Isopropylbenzene level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Delta Shores Resort
Isleton, CA
2501 of 20.49 ppb
(0 to 0.97 ppb)
2California Water Service Co. - Herm/Redo
Torrance, CA
97,9441 of 50.11 ppb
(0 to 0.55 ppb)
3Montara Water and Sanitary District
Montara, CA
5,4121 of 260.01 ppb
(0 to 0.3 ppb)
4Calam - Parkway
Sacramento, CA
43,9961 of 113< 0.01 ppb
(0 to 0.7 ppb)
5San Gabriel Valley WC - Fontana
Fontana, CA
102,5991 of 77< 0.01 ppb
(0 to 0.25 ppb)
6Valley County Water Dist.
Baldwin Park, CA
55,0002 of 348< 0.01 ppb
(0 to 0.85 ppb)
7City of Modesto
Modesto, CA
190,1061 of 220< 0.01 ppb
(0 to 0.29 ppb)

Health Based Limits for Isopropylbenzene

StandardDescriptionLevel
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.700 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.4000 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.11000 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.11000 ppb

Violation Summary for Isopropylbenzene in California

There are no violations reported for this contaminant in California