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EWG's Tap Water Database — 2019 UPDATE

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o-Dichlorobenzene

Status: National drinking water standard exists

 

o-Dichlorobenzene is used as a chemical intermediate for making agricultural herbicides. It is toxic to the liver, kidneys and the nervous system, and causes cancer in animal studies.

2015-2017:

FOUND
FOUND ABOVE HEALTH GUIDELINES

9

states detected

37

utilities detected

762,000

people served

0

states over health guideline

0

utilities over health guideline

0

people served over health guideline

Health concerns for o-dichlorobenzene

Cancer

Harm to the central nervous system

Harm to the liver

Harm to the kidney

State and national drinking water standards and health guidelines

EWG Health Guideline 600 ppb

The EWG Health Guideline of 600 ppb for o-dichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 600 ppb

The legal limit for o-dichlorobenzene, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1970s.

ppb = parts per billion

States reporting o-dichlorobenzene in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
Florida15456,347
Massachusetts7228,561
Connecticut137,267
Louisiana818,952
California111,104
Ohio16,400
New Jersey22,890
Vermont1126
Pennsylvania167
MORE
LESS

Filtering technologies that reduce o-dichlorobenzene

carbon filter icon

Activated Carbon

reverse osmosis icon

Reverse Osmosis

Utilities with the highest amounts of o-dichlorobenzene, 2015-2017

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
City of MendotaMendota, CA1 of 412.4 ppb11,104
Coburn Mobile Home ParkMontpelier, VT3 of 31.000 ppb126
Wrentham Water DivisionWrentham, MA2 of 60.400 ppb11,651
Indiantown CompanyIndiantown, FL1 of 20.250 ppb5,000
Cedar Springs Mobile Home Park Well #Shamong, NJ8 of 90.161 ppb90
Peg Leg Cove Water SystemScott, LA2 of 60.117 ppb189
South Toledo Bend Water District*Many, LA2 of 60.117 ppb5,802
Cherry Valley/ Rochdale Water DistrictLeicester, MA1 of 60.1000 ppb3,255
Woodbine Municipal Utilities AuthorityWoodbine, NJ2 of 30.1000 ppb2,800
Worcester Department of Public Works*Worcester, MA1 of 60.1000 ppb181,045
Paxton Water DepartmentPaxton, MA1 of 60.1000 ppb4,028
Millbury Ind. Park/ Park Hill VillageMillbury, MA1 of 60.1000 ppb400
Woodland Water DistrictAuburn, MA1 of 60.1000 ppb465
Elm Hill Water DistrictAuburn, MA1 of 60.1000 ppb2,260
St. Mary Parish Water & Sewer #2 Bayou VistaPatterson, LA2 of 60.0900 ppb4,652
Town of BerwickBerwick, LA2 of 60.0900 ppb4,430
Berwick Bayou Vista Water Works Commission*Berwick, LA2 of 60.0900 ppb0
Fern Crest Utilities Inc.Ft Lauderdale, FL1 of 30.0833 ppb4,643
Goldonna Water System*Goldonna, LA2 of 60.0833 ppb435
South Broward Utility/sunriseFort Lauderdale, FL1 of 30.0733 ppb9,457
Oak Grove Water SystemOak Grove, LA2 of 80.0700 ppb3,102
City of Stuart - Water PlantStuart, FL3 of 490.0637 ppb19,000
Valley View EstatesMacungie, PA1 of 120.0583 ppb67
City of Broussard Highway 90 Water SystemBroussard, LA2 of 220.0455 ppb342
North Attleboro Water Department*North Attleborough, MA1 of 190.0447 ppb28,712
Miramar (East & West) PlantsMiramar, FL1 of 60.0417 ppb128,729
Wallingford Water DepartmentWallingford, CT1 of 170.0294 ppb37,267
Riviera Beach Utility District*Riviera Beach, FL1 of 440.0280 ppb31,500
Palm Lakes Estates SouthRiviera Bch, FL1 of 440.0280 ppb700
Palm Lakes Estates NorthRiviera Beach, FL1 of 440.0280 ppb480
Milford City Public Water SystemMilford, OH1 of 190.0263 ppb6,400
Lee County Utilities*Fort Myers, FL1 of 70.0143 ppb236,944
Town of Fort Myers Beach (beach Water)Fort Myers Beach, FL1 of 70.0143 ppb6,900
Old Bridge Village Mobile Home ParkNorth Fort Myers, FL1 of 70.0143 ppb1,000
Pine Lakes Mobile Home ParkN. Fort Myers, FL1 of 70.0143 ppb1,220
Tamiami Village Mobile Home ParkN. Fort Myers, FL1 of 70.0143 ppb1,200
Mobile Manor Mobile Home ParkN. Fort Myers, FL1 of 70.0143 ppb482
Gateway Services DistrictFort Myers, FL1 of 70.0143 ppb9,092

* 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 o-Dichlorobenzene, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
City of MendotaMendota, CA1 of 412.4 ppb11,104
Wrentham Water DivisionWrentham, MA2 of 60.400 ppb11,651
Worcester Department of Public Works*Worcester, MA1 of 60.1000 ppb181,045
City of Stuart - Water PlantStuart, FL3 of 490.0637 ppb19,000
North Attleboro Water Department*North Attleborough, MA1 of 190.0447 ppb28,712
Miramar (East & West) PlantsMiramar, FL1 of 60.0417 ppb128,729
Wallingford Water DepartmentWallingford, CT1 of 170.0294 ppb37,267
Riviera Beach Utility District*Riviera Beach, FL1 of 440.0280 ppb31,500
Lee County Utilities*Fort Myers, FL1 of 70.0143 ppb236,944

* 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 o-Dichlorobenzene, but it likely has the contaminant in its water supply.