DCPA di-acid degradate
Status: No national drinking water standard exists
DCPA di-acid degradate is a residue of the herbicide dacthal, or DCPA, which is used for urban, household and agricultural applications. Dacthal is a possible human carcinogen whose use was limited by the EPA in 2005 due to concerns about water contamination.
2015-2017:
FOUND
1
states detected
56
utilities detected
1.4 million
people served
States reporting DCPA di-acid degradate in drinking water
| UTILITIES WITH CONTAMINATION | |||
|---|---|---|---|
| State | Utilities | People Served | |
| Washington | 56 | 1,378,017 | |
MORE
LESS
Filtering technologies that reduce DCPA di-acid degradate
Activated Carbon
Reverse Osmosis
Utilities with the highest amounts of DCPA di-acid degradate, 2015-2017
ALL UTILITIES
LARGE UTILITIES
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Hill Top Acres | College Place, WA | 12 of 12 | 75.5 ppb | 52 |
| Golden Valley Water Association | Quincy, WA | 2 of 2 | 33.9 ppb | 128 |
| Weiler-martin Tracts Water Association | Quincy, WA | 2 of 2 | 20.0 ppb | 775 |
| Valle Lindo Homes | Walla Walla, WA | 3 of 3 | 17.2 ppb | 570 |
| Quincy Water Department, City Of | Quincy, WA | 13 of 13 | 17.0 ppb | 6,815 |
| Key Ridge Water System | Gig Harbor, WA | 2 of 4 | 15.5 ppb | 63 |
| Sportsman Trailer Park | Ellensburg, WA | 1 of 1 | 3.78 ppb | 150 |
| Bridle Moor Water Association | Yakima, WA | 1 of 1 | 3.62 ppb | 44 |
| Country Corner Mobile Home Park | Gig Harbor, WA | 1 of 1 | 3.10 ppb | 95 |
| Admiral Water Users Association | Moses Lake, WA | 1 of 1 | 3.00 ppb | 74 |
| Highline Water District* | Kent, WA | 1 of 1 | 2.20 ppb | 68,258 |
| Sage Hills Second Water System | Warden, WA | 1 of 1 | 1.93 ppb | 28 |
| Arlenes Addition | Burbank, WA | 2 of 2 | 1.51 ppb | 480 |
| Lakeview Park Water Association | Soap Lake, WA | 2 of 2 | 1.45 ppb | 1,165 |
| Country Lane East | Othello, WA | 1 of 1 | 0.650 ppb | 26 |
| Othello Water Department* | Othello, WA | 5 of 5 | 0.458 ppb | 6,495 |
| Adams County Water District #1 | Othello, WA | 5 of 5 | 0.458 ppb | 740 |
| Consolidated Irrigation District 14* | College Place, WA | 1 of 2 | 0.450 ppb | 1,523 |
| Blalock Orchard District 10 | Walla Walla, WA | 1 of 1 | 0.383 ppb | 250 |
| Sage Hills Estates 1 | Warden, WA | 1 of 1 | 0.310 ppb | 38 |
| Alps Mobile Home Park | Moxee, WA | 1 of 1 | 0.300 ppb | 150 |
| Tieton Hills Water Co. | Yakima, WA | 1 of 1 | 0.300 ppb | 75 |
| Paterson Heights Water Association | Paterson, WA | 2 of 2 | 0.295 ppb | 65 |
| Connell, City of | Connell, WA | 4 of 6 | 0.275 ppb | 5,150 |
| Goodnight Water System | Kennewick, WA | 2 of 2 | 0.249 ppb | 50 |
| Cougar Campers | Cle Elum, WA | 2 of 2 | 0.230 ppb | 44 |
| Royal City Water | Royal City, WA | 6 of 8 | 0.188 ppb | 2,190 |
| Diamond Point Water System | Cle Elum, WA | 1 of 1 | 0.187 ppb | 90 |
| Walla Walla University | College Place, WA | 1 of 1 | 0.129 ppb | 900 |
| White Bluff Water Association | Pasco, WA | 1 of 2 | 0.102 ppb | 111 |
| Blalock Orchards District 12 | Walla Walla, WA | 1 of 1 | 0.0890 ppb | 150 |
| Hydro Irrigation District #9* | Walla Walla, WA | 1 of 1 | 0.0890 ppb | 240 |
| City of Sunnyside | Sunnyside, WA | 1 of 3 | 0.0800 ppb | 15,858 |
| Towns Mobile Home Park | Cashmere, WA | 1 of 3 | 0.0667 ppb | 35 |
| City of Moses Lake | Moses Lake, WA | 3 of 11 | 0.0545 ppb | 22,930 |
| Whitstran Heights Water Association | Prosser, WA | 1 of 1 | 0.0440 ppb | 65 |
| Seattle Public Utilities* | Seattle, WA | 1 of 3 | 0.0433 ppb | 678,000 |
| Highlands, Inc., The | Shoreline, WA | 1 of 3 | 0.0433 ppb | 243 |
| King County Water District #20* | Seattle, WA | 1 of 3 | 0.0433 ppb | 31,710 |
| North City Water District | Shoreline, WA | 1 of 3 | 0.0433 ppb | 24,886 |
| King County Water District #45 | Seattle, WA | 1 of 3 | 0.0433 ppb | 3,413 |
| King County Water District #49* | Burien, WA | 1 of 3 | 0.0433 ppb | 15,987 |
| Soos Creek Water and Sewer District | Renton, WA | 1 of 3 | 0.0433 ppb | 62,898 |
| Duvall, City Of | Duvall, WA | 1 of 3 | 0.0433 ppb | 7,183 |
| Northshore Utility District* | Kenmore, WA | 1 of 3 | 0.0433 ppb | 70,146 |
| Woodinville Water District | Woodinville, WA | 1 of 3 | 0.0433 ppb | 48,400 |
| Coal Creek Utility District* | Newcastle, WA | 1 of 3 | 0.0433 ppb | 11,833 |
| King County Water District 119 | Duvall, WA | 1 of 3 | 0.0433 ppb | 3,250 |
| City of Kirkland* | Kirkland, WA | 1 of 3 | 0.0433 ppb | 40,648 |
| City of Mercer Island | Mercer Island, WA | 1 of 3 | 0.0433 ppb | 22,720 |
* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report DCPA di-acid degradate, but it likely has the contaminant in its water supply.
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Highline Water District* | Kent, WA | 1 of 1 | 2.20 ppb | 68,258 |
| City of Sunnyside | Sunnyside, WA | 1 of 3 | 0.0800 ppb | 15,858 |
| City of Moses Lake | Moses Lake, WA | 3 of 11 | 0.0545 ppb | 22,930 |
| Seattle Public Utilities* | Seattle, WA | 1 of 3 | 0.0433 ppb | 678,000 |
| City of Mercer Island | Mercer Island, WA | 1 of 3 | 0.0433 ppb | 22,720 |
| City of Kirkland* | Kirkland, WA | 1 of 3 | 0.0433 ppb | 40,648 |
| Coal Creek Utility District* | Newcastle, WA | 1 of 3 | 0.0433 ppb | 11,833 |
| Woodinville Water District | Woodinville, WA | 1 of 3 | 0.0433 ppb | 48,400 |
| Northshore Utility District* | Kenmore, WA | 1 of 3 | 0.0433 ppb | 70,146 |
| Soos Creek Water and Sewer District | Renton, WA | 1 of 3 | 0.0433 ppb | 62,898 |
| King County Water District #49* | Burien, WA | 1 of 3 | 0.0433 ppb | 15,987 |
| North City Water District | Shoreline, WA | 1 of 3 | 0.0433 ppb | 24,886 |
| King County Water District #20* | Seattle, WA | 1 of 3 | 0.0433 ppb | 31,710 |
* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report DCPA di-acid degradate, but it likely has the contaminant in its water supply.