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.

2017-2019:

FOUND

states detected

utilities detected

69,532

people served

States reporting DCPA di-acid degradate in drinking water

	UTILITIES WITH CONTAMINATION
State	Utilities	People Served
Washington		49	69,532

LESS

Filtering technologies that reduce DCPA di-acid degradate

Utilities with the highest amounts of DCPA di-acid degradate, 2017-2019

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Hill Top Acres	College Place, WA	21 of 21	78.9 ppb	81
Golden Valley Water Association	Quincy, WA	8 of 8	41.3 ppb	128
Weiler-martin Tracts Water Association	Quincy, WA	3 of 3	25.7 ppb	775
Quincy Water Department City Of	Quincy, WA	27 of 27	21.2 ppb	7,345
Key Ridge Water System	Gig Harbor, WA	5 of 7	20.4 ppb	63
Valle Lindo Homes	Walla Walla, WA	6 of 6	17.4 ppb	570
WA of Great Neck North	Great Neck, NY	7 of 13	3.88 ppb	31,400
Bridle Moor Water Association	Yakima, WA	1 of 1	3.62 ppb	44
Sportsman Trailer Park	Ellensburg, WA	2 of 2	3.57 ppb	150
Country Corner Mobile Home Park	Gig Harbor, WA	2 of 3	2.51 ppb	95
Glen Cove City	Glen Cove, NY	2 of 2	2.10 ppb	28,000
Sage Hills Second Water System	Warden, WA	1 of 1	1.93 ppb	28
Admiral Water Users Association	Moses Lake, WA	2 of 2	1.93 ppb	74
Lakeview Park Water Association	Quincy, WA	4 of 5	1.70 ppb	1,165
Arlenes Addition	Burbank, WA	4 of 4	1.38 ppb	480
Neals Valley View Addition Water Co.	Yakima, WA	2 of 2	0.940 ppb	62
Country Lane East	Othello, WA	1 of 1	0.650 ppb	26
Consolidated Irrigation District 14*	College Place, WA	2 of 3	0.513 ppb	1,555
Othello Water Department*	Othello, WA	10 of 12	0.480 ppb	7,680
Adams County Water District #1	Othello, WA	10 of 12	0.480 ppb	870
Highline Water District*	Kent, WA	1 of 5	0.440 ppb	76,365
Paterson Heights Water Association	Paterson, WA	4 of 4	0.438 ppb	70
Blalock Orchard District 10	Walla Walla, WA	2 of 2	0.355 ppb	250
Meadow Park Water System	Yakima, WA	1 of 1	0.264 ppb	48
Alps Mobile Home Park	Yakima, WA	2 of 2	0.250 ppb	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
Sage Hills Estates 1	Warden, WA	2 of 2	0.211 ppb	38
Connell, City of	Connell, WA	4 of 8	0.206 ppb	5,150
Royal City Water	Royal City, WA	6 of 8	0.188 ppb	2,190
Mt View Water System	Moses Lake, WA	3 of 3	0.175 ppb	42
Tieton Hills Water Co.	Yakima, WA	1 of 2	0.150 ppb	75
Diamond Point Water System	Cle Elum, WA	2 of 2	0.149 ppb	100
Wolfe Water Association	Yakima, WA	1 of 1	0.130 ppb	70
City of Moses Lake	Moses Lake, WA	9 of 24	0.113 ppb	22,930
Hydro Irrigation District #9*	Walla Walla, WA	2 of 2	0.103 ppb	240
Blalock Orchards District 12	Walla Walla, WA	2 of 2	0.103 ppb	150
City of Sunnyside	Sunnyside, WA	2 of 6	0.0850 ppb	16,280
Walla Walla University	Walla Walla, WA	2 of 2	0.0815 ppb	900
White Bluff Water Association	Pasco, WA	2 of 4	0.0795 ppb	121
Towns Mobile Home Park	Cashmere, WA	1 of 4	0.0500 ppb	35
Rainier Tracts Water Association	Othello, WA	1 of 2	0.0475 ppb	61
Whitstran Heights Water Association	Yakima, WA	1 of 1	0.0440 ppb	65
Duvall City Of	Duvall, WA	1 of 3	0.0433 ppb	7,500
Highlands Inc. The	Shoreline, WA	1 of 3	0.0433 ppb	250
Seattle Public Utilities*	Seattle, WA	1 of 3	0.0433 ppb	788,263
King County Water District #20*	Seattle, WA	1 of 3	0.0433 ppb	38,974
North City Water District	Shoreline, WA	1 of 3	0.0433 ppb	25,476
King County Water District #49*	Burien, WA	1 of 3	0.0433 ppb	16,065
Soos Creek Water and Sewer District	Renton, WA	1 of 3	0.0433 ppb	64,534

* 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
WA of Great Neck North	Great Neck, NY	7 of 13	3.88 ppb	31,400
Glen Cove City	Glen Cove, NY	2 of 2	2.10 ppb	28,000
Highline Water District*	Kent, WA	1 of 5	0.440 ppb	76,365
City of Moses Lake	Moses Lake, WA	9 of 24	0.113 ppb	22,930
City of Sunnyside	Sunnyside, WA	2 of 6	0.0850 ppb	16,280
King County Water District #20*	Seattle, WA	1 of 3	0.0433 ppb	38,974
North City Water District	Shoreline, WA	1 of 3	0.0433 ppb	25,476
King County Water District #49*	Burien, WA	1 of 3	0.0433 ppb	16,065
Soos Creek Water and Sewer District	Renton, WA	1 of 3	0.0433 ppb	64,534
Northshore Utility District*	Kenmore, WA	1 of 3	0.0433 ppb	74,789
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
City of Kirkland*	Kirkland, WA	1 of 3	0.0433 ppb	52,630
City of Mercer Island	Mercer Island, WA	1 of 3	0.0433 ppb	22,699
Seattle Public Utilities*	Seattle, WA	1 of 3	0.0433 ppb	788,263