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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.

Butanal (also called Butyraldehyde) is a high production volume chemical used in chemical industry; over one billion pounds of butanal were produced in 2006.

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

Butanal Exposure by State

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

StateWater Suppliers with Butanal contamination

The Most Polluted Communities

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

Ranked by highest average Butanal level

RankSystem Population Served Positive test results of total reported tests Average Level
1White Oak Manor Mobile Home Park
Houston, TX
6481 of 13.7 ppb
(3.7 ppb)
2Northwest Harris County Mud 23
Spring, TX
3,2761 of 12.55 ppb
(2.55 ppb)
3Bilma Pud
Spring, TX
2,8861 of 12.5 ppb
(2.5 ppb)
4Louetta Road Utility District
Spring, TX
1,3231 of 12.3 ppb
(2.3 ppb)
5Timberlane Utility District
Houston, TX
10,5031 of 12.3 ppb
(2.3 ppb)
6North Channel Water Authority
Houston, TX
251 of 11.9 ppb
(1.9 ppb)
7Horseshoe Bend Village
Houston, TX
4951 of 11.8 ppb
(1.8 ppb)
8City of China
China, TX
1,6441 of 11.6 ppb
(1.6 ppb)
9Pine Meadows Subdivision
Shepherd, TX
901 of 11.5 ppb
(1.5 ppb)
10Cedar Bayou Park Water Supply Inc
Baytown, TX
5671 of 11.1 ppb
(1.1 ppb)

Testing Summary for Butanal

Are tests routinely required for Butanal by federal law?No
Water suppliers reporting tests for Butanal (2005-2006):14 of 47,576
Average testing rate for water supplier reporting tests (2005-2006):0.5 per year