National Drinking Water Database
National Drinking Water Database - Chemical Contaminants
Merphos
Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.
Merphos is an organophosphorus compound used for pesticide manufacturing; millions of pounds are produced annually.
Detected |
Found above health guidelines |
Found above legal limit |
|
|---|---|---|---|
| States | 1 |
- |
- |
| Water utilities | 1 |
- |
- |
| People Served | 300 |
- |
- |
Merphos Exposure by State
Water utilities in 1 states have reported detecting Merphos in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.
| State | Water Suppliers with Merphos contamination | |
|---|---|---|
| Systems | Population | |
| California | 1 | 300 |
| Total | 1 | 300 |
The Most Polluted Communities
1 water utilities reported detecting Merphos in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Merphos level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Brock Mutual Water Company Bakesrfield, CA | 300 | 1 of 1 | 2.15 ppb (2.15 ppb) |
Testing Summary for Merphos
| Are tests routinely required for Merphos by federal law? | No |
| Water suppliers reporting tests for Merphos (2004-2007): | 218 of 47,576 |
| Average testing rate for water supplier reporting tests (2004-2007): | 0.3 per year |