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EWG's Tap Water Database — 2019 UPDATE

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Dacthal

Status: No national drinking water standard exists

 

Dacthal is a weedkiller classified by the Environmental Protection Agency as a possible human carcinogen, and prohibited for use in Europe since 2009.

2015-2017:

FOUND

4

states detected

19

utilities detected

476,000

people served

Health concerns for dacthal

Cancer

Change to the thyroid

Change to the liver

States reporting dacthal in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
New York6321,200
Rhode Island10142,930
California111,104
Washington21,209
MORE
LESS

Filtering technologies that reduce dacthal

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Activated Carbon

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Reverse Osmosis

Utilities with the highest amounts of dacthal, 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
City of MendotaMendota, CA1 of 160.0 ppb11,104
Hicksville WDHicksville, NY1 of 16.90 ppb48,000
WA of Great Neck NorthGreat Neck, NY13 of 215.52 ppb31,400
Sands PointPort Washington, NY13 of 174.14 ppb2,800
Harrison-ray-burbank Water SystemPasco, WA1 of 11.60 ppb656
North Kingstown*North Kingstown, RI4 of 220.786 ppb23,568
New York American Water - LynbrookMerrick, NY78 of 1610.737 ppb220,000
Roslyn WD*Roslyn, NY9 of 160.725 ppb18,000
Glenwood Water DistrictGlenwood Landing, NY9 of 160.725 ppb1,000
South Kingstown-middlebridgeWakefield, RI4 of 140.329 ppb543
United Water Rhode Island*Wakefield, RI4 of 140.329 ppb19,800
Narragansett Water System-point Judith*Narragansett, RI4 of 140.329 ppb8,189
Green Tank Irr District 11Walla Walla, WA2 of 20.140 ppb553
Naval Station, NewportNewport, RI3 of 160.139 ppb7,871
United States Navy (fort Adams)Newport, RI3 of 160.139 ppb318
Portsmouth Water & Fire DistrictPortsmouth, RI3 of 160.139 ppb16,864
City of Newport*Newport, RI3 of 160.139 ppb42,000
University of Rhode IslandKingston, RI1 of 50.0900 ppb19,354

* 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 Dacthal, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
City of MendotaMendota, CA1 of 160.0 ppb11,104
Hicksville WDHicksville, NY1 of 16.90 ppb48,000
WA of Great Neck NorthGreat Neck, NY13 of 215.52 ppb31,400
North Kingstown*North Kingstown, RI4 of 220.786 ppb23,568
New York American Water - LynbrookMerrick, NY78 of 1610.737 ppb220,000
Roslyn WD*Roslyn, NY9 of 160.725 ppb18,000
United Water Rhode Island*Wakefield, RI4 of 140.329 ppb19,800
City of Newport*Newport, RI3 of 160.139 ppb42,000
Portsmouth Water & Fire DistrictPortsmouth, RI3 of 160.139 ppb16,864
University of Rhode IslandKingston, RI1 of 50.0900 ppb19,354

* 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 Dacthal, but it likely has the contaminant in its water supply.