Know Your Environment. Protect Your Health.

CONTAMINANT

Methoxychlor

FOUND

Exceeding guidelines

STATES DETECTED

14

serves

267,000

utilities detected

88

states detected

3

serves

35,261

utilities detected

17

Overview

Methoxychlor is an endocrine-disrupting, neurotoxic insecticide similar to DDT. Banned in the U.S. in 2002, methoxychlor was historically used on farm animals and in animal feed, lumber, gardens and agricultural crops.

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.09 ppb

The EWG Health Guideline of 0.09 ppb for methoxychlor 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 hormone disruption.

EPA Maximum Contaminant
Level (MCL): 40 ppb

The legal limit for methoxychlor, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

National Standard Exists

Health Concerns:

  • Hormone disruption

  • Harm to the reproductive system

  • Harm to the kidney

  • Harm to the liver

  • Harm to the immune system

  • Harm to the brain and nervous system

Want to remove
Methoxychlor from your water?

Try these filter technologies:

Activated Carbon

Reverse Osmosis

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Methoxychlor around the Country

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State Utilities People Served Utilities People Served
Rhode Island00467,434
Kansas137,4085439,598
California00235,710
Wisconsin00234,525
Louisiana00226,152
Kentucky217,438217,438
Florida001115,185
Missouri210,415210,415
Arizona0019,094
Maryland0016,600
Georgia0022,364
Ohio0031,334
Wyoming001950
New York001180

Utilities with the highest amounts of methoxychlor, 2021-2023

ALL UTILITIES
LARGE UTILITIES
Utility Location Tests Average level People served
Ohio County Water District*Hartford, KY1 of 50.800 ppb16,511
Fordsville Water DistrictFordsville, KY1 of 50.800 ppb927
Cooper County Consolidated Public Water Supply District # 1Boonville, MO1 of 30.310 ppb2,451
Boonville PWS*Boonville, MO1 of 30.310 ppb7,964
Highland, City ofHighland, KS1 of 10.250 ppb917
Timber Creek East Water DistrictWestmoreland, KS1 of 10.250 ppb850
Paxico, City ofPaxico, KS1 of 10.250 ppb212
Nortonville, City ofNortonville, KS1 of 10.250 ppb599
Elgin, City ofSedan, KS1 of 10.240 ppb56
Oneida, City ofOneida, KS1 of 10.220 ppb58
Harper County Rural Water District 2Anthony, KS1 of 10.220 ppb275
Glade, City ofPhillipsburg, KS1 of 10.220 ppb52
Whiting, City ofWhiting, KS1 of 10.220 ppb196
Anthony, City of*Anthony, KS1 of 10.220 ppb2,043
Cowley County Rural Water District 1Arkansas City, KS2 of 20.215 ppb1,500
Winchester, City ofWinchester, KS1 of 10.210 ppb450
Agra, City ofAgra, KS1 of 10.210 ppb200
Dighton, City ofDighton, KS4 of 50.176 ppb954
Hays Suburban EstatesHays, KS1 of 10.110 ppb38
Fowler, City ofFowler, KS1 of 20.110 ppb532
Ransom, City ofRansom, KS1 of 10.110 ppb253
Olsburg, City ofOlsburg, KS1 of 10.110 ppb221
Minneola, City ofMinneola, KS1 of 20.105 ppb752
Girard, City ofGirard, KS1 of 10.1000 ppb2,497
Norton Correctional FacilityNorton, KS1 of 10.1000 ppb950
Trego County Rural Water District 1Ransom, KS1 of 10.1000 ppb56
Gaylord, City ofGaylord, KS1 of 10.1000 ppb83
Pottawatomie County Rural Water District 2*Olsburg, KS1 of 10.1000 ppb625
Burdett, City ofBurdett, KS1 of 10.1000 ppb218
Rooks County Rural Water District 2Codell, KS1 of 10.1000 ppb40
Brown County Rural Water District 2*Powhattan, KS1 of 10.1000 ppb724
Jennings, City ofJennings, KS1 of 10.1000 ppb80
Doniphan Co. RWD 6Troy, KS1 of 10.1000 ppb428
Ellis County Rural Water District 3Hays, KS1 of 10.1000 ppb200
Public Wholesale WSD 27*Powhattan, KS1 of 10.1000 ppb1
Robinson, City ofRobinson, KS1 of 10.1000 ppb181
Cowley County Rural Water District 6Arkansas City, KS1 of 10.1000 ppb792
Leavenworth County Rural Water District 9Tonganoxie, KS2 of 50.0860 ppb2,000
Jackson County Rural Water District 3*Holton, KS1 of 30.0833 ppb4,376
Mayetta, City ofMayetta, KS1 of 30.0833 ppb356
Netawaka, City ofNetawaka, KS1 of 30.0833 ppb141
Soldier, City ofSoldier, KS1 of 30.0833 ppb102
Denison, City ofDenison, KS1 of 30.0833 ppb145
Circleville, City ofCircleville, KS1 of 30.0833 ppb155
Osborne County Rural Water District 1aGaylord, KS2 of 30.0667 ppb81
Town of HampsteadHampstead, MD1 of 100.0610 ppb6,600
Onaga, City of*Onaga, KS1 of 20.0550 ppb671
Pottawatomie County Rural Water District 3*Onaga, KS1 of 20.0550 ppb1,455
Havensville, City ofHavensville, KS1 of 20.0550 ppb125
Attica, City ofAttica, KS1 of 20.0500 ppb506

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

UtilityLocationTestsAverage levelPeople served
Ohio County Water District*Hartford, KY1 of 50.800 ppb16,511
Trabuco Canyon Water District*Trabuco Canyon, CA1 of 10.0210 ppb13,659
Sunrise SouthwestFort Lauderdale, FL1 of 40.00575 ppb10,750
City of Newport*Newport, RI3 of 710.00423 ppb42,155
Portsmouth Water & Fire DistrictPortsmouth, RI3 of 710.00423 ppb17,090
Manitowoc Waterworks*Manitowoc, WI1 of 60.00200 ppb34,500
Pico WDPico Rivera, CA1 of 120.00142 ppb22,051
Beauregard Water Works District #3Longville, LA1 of 210.00119 ppb23,100

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

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