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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Isopropylbenzene


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

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.

 
Detected
Found above
health guidelines
Found above
legal limit
States
17
-
-
Water utilities
52
-
-
People Served
721,208
-
-

Isopropylbenzene Exposure by State

Water utilities in 17 states have reported detecting Isopropylbenzene in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Isopropylbenzene contamination
SystemsPopulation
California7495,307
Rhode Island270,133
New Mexico256,070
Michigan238,143
Minnesota326,346
Massachusetts18,000
Nebraska27,387
New York84,602
Missouri33,853
Wisconsin53,513
Washington12,865
North Carolina101,582
Texas21,258
Virginia1924
Vermont1825
Montana1350
Maryland150
Total52721,208

The Most Polluted Communities

52 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)
1Collingwood Associates, L.P.
King Of Prussia, NY
3601 of 37 ppb
(0 to 21 ppb)
2Long Beach Water Department
Long Beach, WA
2,8651 of 111.73 ppb
(0 to 19 ppb)
3Woodbridge S/D
Mt Airy, NC
2722 of 101.08 ppb
(0 to 10 ppb)
4Jericho Underhill Water
Underhill, VT
8252 of 70.84 ppb
(0 to 5.1 ppb)
5The Market AT Meyer Park
Spring, TX
7001 of 20.73 ppb
(0 to 1.45 ppb)
6Dove Meadows S/D
Gastonia, NC
413 of 130.6 ppb
(0 to 4.4 ppb)
7East Branch Valley Inc
East Branch, NY
1331 of 20.6 ppb
(0 to 1.2 ppb)
8Parkwood Green
Sparta, MI
2702 of 30.5 ppb
(0 to 1.2 ppb)
9Bedford Hills/Taconic Corr. Facilities
Bedford Hills, NY
1,1001 of 10.5 ppb
(0.5 ppb)
10Delta Shores Resort
Isleton, CA
2501 of 20.49 ppb
(0 to 0.97 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

Testing Summary for Isopropylbenzene

Are tests routinely required for Isopropylbenzene by federal law?No
Water suppliers reporting tests for Isopropylbenzene (2004-2009):20,680 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.6 per year