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National Drinking Water Database

National Drinking Water Database - Chemical Contaminants


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

Pentane is a short, volatile hydrocarbon; it is a component of some fuels, specialty solvent, and a blowing agent used in production of polystyrene foam.

Found above
health guidelines
Found above
legal limit
Water utilities
People Served

Pentane Exposure by State

Water utilities in 1 states have reported detecting Pentane in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Pentane contamination

The Most Polluted Communities

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

Ranked by highest average Pentane level

RankSystem Population Served Positive test results of total reported tests Average Level
1Heatherloch Mud
Tomball, TX
6,1291 of 226 ppb
(0 to 52 ppb)
2Bluff Dale Wsc
Bluff Dale, TX
13 of 325.02 ppb
(1.67 to 51.01 ppb)
3Mesa Grande Wsc
Weatherford, TX
3513 of 417.43 ppb
(0 to 32.05 ppb)
4The Market AT Meyer Park
Spring, TX
7001 of 112.5 ppb
(12.5 ppb)
5North Harris County Regional Water Autho
01 of 211.25 ppb
(0 to 22.5 ppb)
6Lake Country Acres
Houston, TX
5882 of 38.13 ppb
(0 to 16 ppb)
7B F E Water Co
Weatherford, TX
92 of 24.42 ppb
(0.9 to 7.93 ppb)
8Harris County Mud 58
Houston, TX
1,5422 of 23.78 ppb
(1.65 to 5.9 ppb)
9Benbrook Village Mobile Home Park
Fort Worth, TX
1801 of 23.41 ppb
(0 to 6.81 ppb)
10Northwest Harris County Mud 23
Spring, TX
3,2761 of 11.55 ppb
(1.55 ppb)

Testing Summary for Pentane

Are tests routinely required for Pentane by federal law?No
Water suppliers reporting tests for Pentane (2004-2007):1,677 of 47,576
Average testing rate for water supplier reporting tests (2004-2007):0.3 per year