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EWG's Tap Water Database — 2021 UPDATE

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o-toluidine

Status: No national drinking water standard exists

 

The synthetic chemical o-toluidine is used to manufacture pesticides, dyes and other industrial chemicals. The International Agency for Research on Cancer has classified o-toluidine as carcinogenic to humans, and it may also harm the nervous system, kidneys and bladder.

2018-2021:

FOUND

24

states detected

211

utilities detected

12 million

people served

States reporting o-toluidine in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California124,641,043
Texas532,477,221
Arizona101,229,195
New Mexico3659,989
Iowa44573,165
Utah10401,012
Tennessee10357,090
Nevada1311,932
Illinois19266,512
Michigan2196,166
Missouri4142,147
Kentucky12122,170
New Jersey8105,047
Massachusetts4101,548
Idaho161,500
Oklahoma155,083
Washington241,816
Georgia539,644
New York239,125
Alabama233,075
Mississippi126,000
South Dakota225,271
Indiana119,295
District Of Columbia115,690
North Carolina114,669
MORE
LESS

Filtering technologies that reduce o-toluidine

Activated Carbon

Reverse Osmosis

Utilities with the highest amounts of o-toluidine , 2018-2021

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Naval Station Washington - WNYWashington Navy Yard, DC2 of 40.0550 ppb15,690
WentzvilleWentzville, MO2 of 40.0400 ppb38,300
Cape May Water & Sewer*Cape May, NJ1 of 40.0298 ppb35,000
West Cape May Water DepartmentWest Cape May, NJ1 of 40.0298 ppb4,600
Cape May Point Borough WaterCape May Point, NJ1 of 40.0298 ppb4,000
Northeast Knox U D*Corryton, TN3 of 40.0133 ppb24,390
Bountiful City Water SystemBountiful, UT1 of 120.0125 ppb37,500
U.s. Coast Guard Training CenterPetaluma, CA2 of 140.01000 ppb1,350
City of Petaluma*Petaluma, CA2 of 140.01000 ppb55,900
Knoxville Utilities Board-KUB*Knoxville, TN2 of 40.00865 ppb241,714
YanktonYankton, SD1 of 20.00850 ppb14,700
Roxbury Water Company*Washington, NJ1 of 100.00688 ppb11,793
South Ogden City Water SystemOgden, UT1 of 40.00500 ppb17,000
Hembree WaterCanton, GA1 of 80.00488 ppb257
Canton*Canton, GA1 of 80.00488 ppb16,375
Fort Dodge Water Supply*Fort Dodge, IA1 of 20.00460 ppb25,206
Palace Park Mobile Home ParkMadrid, IA1 of 20.00460 ppb426
VermillionVermillion, SD1 of 20.00460 ppb10,571
SIRWA #2 (Creston)*Creston, IA1 of 30.00433 ppb18,510
Kellerton Water SupplyKellerton, IA1 of 30.00433 ppb315
Murray Water WorksMurray, IA1 of 30.00433 ppb756
Lenox Water SupplyLenox, IA1 of 30.00433 ppb1,407
Diagonal Water DepartmentDiagonal, IA1 of 30.00433 ppb330
Mount Ayr Water Treatment PlantMount Ayr, IA1 of 30.00433 ppb1,691
Bedford Water WorksBedford, IA1 of 30.00433 ppb1,485
Rathbun Reg Water Association (burlington)*Centerville, IA1 of 40.00425 ppb7,095
Burlington Municipal Waterworks*Burlington, IA1 of 40.00425 ppb25,619
West Burlington Muni. Water SupplyWest Burlington, IA1 of 40.00425 ppb3,370
Mayfield Electric & Water*Mayfield, KY1 of 20.00397 ppb10,024
Graves Co. Water District - ConsumersMayfield, KY1 of 20.00397 ppb4,689
Graves Co. Water District - HardemanMayfield, KY1 of 20.00397 ppb1,129
City of GilroyGilroy, CA1 of 180.00394 ppb39,050
Clive Water DepartmentClive, IA1 of 40.00375 ppb15,447
Chandler Water Works DepartmentChandler, IN1 of 20.00375 ppb19,295
Truckee Meadows Water Authority*Reno, NV2 of 1240.00357 ppb311,932
Sun Valley GidSun Valley, NV2 of 1240.00357 ppb17,000
Draper City Water SystemDraper, UT1 of 40.00350 ppb17,500
City of SachseSachse, TX1 of 80.00325 ppb25,937
MooreMoore, OK2 of 580.00324 ppb55,083
City of Mercer IslandMercer Island, WA1 of 30.00303 ppb22,699
Cedar City WaterworksCedar City, UT1 of 60.00300 ppb31,223
SummitSummit, IL1 of 40.00300 ppb11,446
City of KermanKerman, CA1 of 120.00300 ppb14,068
Pembroke Water Division DpwPembroke, MA2 of 80.00281 ppb19,189
Hickory HillsHickory Hills, IL1 of 30.00277 ppb14,049
Sterling Estates Mobile Home ParkFarmington Hills, IL1 of 30.00277 ppb1,380
Justice-Willow Springs Water Commssion*Justice, IL1 of 30.00277 ppb19,640
First U D of Hawkins Company*Church Hill, TN1 of 80.00263 ppb21,075
South ElginSouth Elgin, IL3 of 160.00263 ppb22,549
New Canton Utility DistrictChurch Hill, TN1 of 80.00263 ppb515

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

UtilityLocationTestsAverage levelPeople served
Naval Station Washington - WNYWashington Navy Yard, DC2 of 40.0550 ppb15,690
WentzvilleWentzville, MO2 of 40.0400 ppb38,300
Cape May Water & Sewer*Cape May, NJ1 of 40.0298 ppb35,000
Northeast Knox U D*Corryton, TN3 of 40.0133 ppb24,390
Bountiful City Water SystemBountiful, UT1 of 120.0125 ppb37,500
City of Petaluma*Petaluma, CA2 of 140.01000 ppb55,900
Knoxville Utilities Board-KUB*Knoxville, TN2 of 40.00865 ppb241,714
YanktonYankton, SD1 of 20.00850 ppb14,700
Roxbury Water Company*Washington, NJ1 of 100.00688 ppb11,793
South Ogden City Water SystemOgden, UT1 of 40.00500 ppb17,000
Canton*Canton, GA1 of 80.00488 ppb16,375
Fort Dodge Water Supply*Fort Dodge, IA1 of 20.00460 ppb25,206
VermillionVermillion, SD1 of 20.00460 ppb10,571
SIRWA #2 (Creston)*Creston, IA1 of 30.00433 ppb18,510
Burlington Municipal Waterworks*Burlington, IA1 of 40.00425 ppb25,619
Mayfield Electric & Water*Mayfield, KY1 of 20.00397 ppb10,024
City of GilroyGilroy, CA1 of 180.00394 ppb39,050
Clive Water DepartmentClive, IA1 of 40.00375 ppb15,447
Chandler Water Works DepartmentChandler, IN1 of 20.00375 ppb19,295
Truckee Meadows Water Authority*Reno, NV2 of 1240.00357 ppb311,932
Sun Valley GidSun Valley, NV2 of 1240.00357 ppb17,000
Draper City Water SystemDraper, UT1 of 40.00350 ppb17,500
City of SachseSachse, TX1 of 80.00325 ppb25,937
MooreMoore, OK2 of 580.00324 ppb55,083
City of Mercer IslandMercer Island, WA1 of 30.00303 ppb22,699
SummitSummit, IL1 of 40.00300 ppb11,446
Cedar City WaterworksCedar City, UT1 of 60.00300 ppb31,223
City of KermanKerman, CA1 of 120.00300 ppb14,068
Pembroke Water Division DpwPembroke, MA2 of 80.00281 ppb19,189
Hickory HillsHickory Hills, IL1 of 30.00277 ppb14,049
Justice-Willow Springs Water Commssion*Justice, IL1 of 30.00277 ppb19,640
South ElginSouth Elgin, IL3 of 160.00263 ppb22,549
First U D of Hawkins Company*Church Hill, TN1 of 80.00263 ppb21,075
Vestal Consolidated WD #1Vestal, NY1 of 100.00247 ppb20,950
Wallkill Consolidated WDMiddletown, NY1 of 100.00240 ppb18,175
Urbandale Water UtilityUrbandale, IA1 of 40.00233 ppb39,463
Frankfort Plant Board*Frankfort, KY1 of 40.00231 ppb52,153
Kalamazoo*Kalamazoo, MI2 of 320.00230 ppb192,992
CrestwoodCrestwood, IL1 of 40.00223 ppb10,950
Wellesley Water Division (MWRA)*Wellesley, MA1 of 100.00207 ppb29,100
Flowing Wells Irrigation DistrictTucson, AZ1 of 100.00206 ppb16,000
Rock IslandRock Island, IL1 of 40.00205 ppb39,684
City of MercedMerced, CA3 of 400.00190 ppb81,130
Lake of Egypt PWD*Marion, IL1 of 40.00190 ppb10,345
North Park PWD*Machesney Park, IL2 of 80.00184 ppb35,518
Ogden City Water System*Ogden, UT1 of 50.00180 ppb82,522
MarionMarion, IL1 of 40.00178 ppb17,428
California American Water Company - AntelopeSacramento, CA1 of 210.00176 ppb34,168
Johnston Municipal Water SupplyJohnston, IA1 of 80.00175 ppb17,306
Benbrook Water AuthorityFort Worth, TX1 of 200.00170 ppb21,530

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