National Drinking Water Database
National Drinking Water Database - Chemical Contaminants
Acetaldhyde
Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.
Acetaldehyde is a widely-used industrial chemical and common air pollutant; it is released into the environment from chemical manufacturing and from the combustion of fossil fuels.
Detected |
Found above health guidelines |
Found above legal limit |
|
|---|---|---|---|
| States | 2 |
- |
- |
| Water utilities | 18 |
- |
- |
| People Served | 233,030 |
- |
- |
Acetaldhyde Exposure by State
Water utilities in 2 states have reported detecting Acetaldhyde in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.
| State | Water Suppliers with Acetaldhyde contamination | |
|---|---|---|
| Systems | Population | |
| Texas | 16 | 118,030 |
| California | 2 | 115,000 |
| Total | 18 | 233,030 |
The Most Polluted Communities
18 water utilities reported detecting Acetaldhyde in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Acetaldhyde level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Valley County Water Dist. Baldwin Park, CA | 55,000 | 2 of 2 | 3.55 ppb (2.4 to 4.7 ppb) |
| 2 | Wright City Wsc 1 Troup, TX | 1,050 | 1 of 1 | 2.2 ppb (2.2 ppb) |
| 3 | Patton Lake Club Inc Splendora, TX | 25 | 1 of 1 | 1.9 ppb (1.9 ppb) |
| 4 | City of Somerville Somerville, TX | 1,704 | 1 of 1 | 1.5 ppb (1.5 ppb) |
| 5 | South Tahoe Pud - Main South Lake Tahoe, CA | 60,000 | 10 of 15 | 1.41 ppb (0 to 4 ppb) |
| 6 | North Harris County Regional Water Autho TX | 0 | 1 of 1 | 1.4 ppb (1.4 ppb) |
| 7 | Bilma Pud Spring, TX | 2,886 | 1 of 1 | 1.3 ppb (1.3 ppb) |
| 8 | Northwest Harris County Mud 23 Spring, TX | 3,276 | 1 of 1 | 1.3 ppb (1.3 ppb) |
| 9 | Inverness Point Water System Austin, TX | 300 | 1 of 1 | 1.3 ppb (1.3 ppb) |
| 10 | Pleasure Point Wsc Zavalla, TX | 216 | 1 of 1 | 1.3 ppb (1.3 ppb) |
Testing Summary for Acetaldhyde
| Are tests routinely required for Acetaldhyde by federal law? | No |
| Water suppliers reporting tests for Acetaldhyde (2004-2009): | 19 of 47,576 |
| Average testing rate for water supplier reporting tests (2004-2009): | 0.3 per year |