Dieldrin

Status: No national drinking water standard exists

Dieldrin is a highly toxic insecticide that was banned in the 1970s due to its persistence in the environment and toxicity to people and wildlife.

2017-2019:

FOUND

states detected

utilities detected

1.2 million

people served

Health concerns for dieldrin

Cancer

Harm to the central nervous system

Change to fetal growth and development

States reporting dieldrin in drinking water

	UTILITIES WITH CONTAMINATION
State	Utilities	People Served
Hawaii		6	724,928
New York		5	177,063
Alabama		4	101,001
Texas		1	59,154
Connecticut		3	51,194
South Carolina		2	50,196
New Jersey		1	39,128
Massachusetts		1	16,445
Delaware		3	6,183

LESS

Filtering technologies that reduce dieldrin

Utilities with the highest amounts of dieldrin, 2017-2019

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Hurley Water Company	Hurley, NY	7 of 17	18.7 ppb	2,483
Colonial Efficiency Apartments	Farmington, CT	2 of 2	0.105 ppb	66
Black Creek Apartments	Farrockaway, NY	9 of 21	0.0994 ppb	80
Henlopen Acres, Town of	Rehoboth, DE	5 of 6	0.0892 ppb	999
Riveredge Rentals	Havertown, PA	3 of 5	0.0600 ppb	80
Manchester Water Department*	Manchester, CT	35 of 61	0.0412 ppb	51,066
Connecticut Water Company - Northern Reg-reservoir Heights	Clinton, CT	35 of 61	0.0412 ppb	62
Aqua NJ - Hamilton Square*	Hamilton, NJ	1 of 2	0.0400 ppb	39,128
Rosemarie Mobile Home Park	Stormville, NY	4 of 8	0.0376 ppb	51
Blades, Town of	Blades, DE	1 of 2	0.0225 ppb	1,200
Water Authority of Western Nassau	New Hyde Park, NY	1 of 11	0.0191 ppb	120,000
Laurens CPW*	Laurens, SC	1 of 6	0.0167 ppb	13,882
Artesian Water Company*	Newark, DE	22 of 115	0.0163 ppb	301,000
Smyrna Water Department	Smyrna, DE	2 of 8	0.0121 ppb	11,584
Aliamanu	Schofield Barracks, HI	5 of 13	0.0108 ppb	6,406
Joint Base Pearl Harbor-Hickam*	Jbpph, HI	5 of 13	0.0108 ppb	65,230
Honolulu-Windward-Pearl Harbor*	Honolulu, HI	92 of 317	0.00965 ppb	631,389
Woodlands At Nuuanu	Honolulu, HI	92 of 317	0.00965 ppb	48
Marine Corps Base Hawaii	Kaneohe Bay, HI	92 of 317	0.00965 ppb	16,300
Mid-clarke Water System*	Grove Hill, AL	1 of 16	0.00938 ppb	1,500
Grove Hill Water Works*	Grove Hill, AL	1 of 16	0.00938 ppb	3,750
Laurel Water Department	Laurel, DE	1 of 8	0.00825 ppb	3,984
Naval Air Station Pensacola / Corry Station	Nas Pensacola, FL	2 of 8	0.00463 ppb	22,600
Port Washington WD	Port Washington, NY	3 of 41	0.00395 ppb	34,000
Newark Water Department	Newark, DE	1 of 11	0.00327 ppb	36,450
Tripler Army Medical Center	Schofield Barracks, HI	1 of 4	0.00250 ppb	5,555
Hillburn Village	Hillburn, NY	6 of 203	0.00141 ppb	950
United Water New York*	West Nyack, NY	6 of 203	0.00141 ppb	270,950
Duxbury Water Department*	Duxbury, MA	1 of 29	0.00138 ppb	16,445
Southern Utilities	Tyler, TX	1 of 79	0.00127 ppb	59,154
Westbury WD	Westbury, NY	1 of 70	0.000800 ppb	20,500
Napier Field Water System	Napier Field, AL	1 of 90	0.000300 ppb	2,292
Dothan Utilities*	Dothan, AL	1 of 90	0.000300 ppb	93,459
Waipahu-Ewa-Waianae	Honolulu, HI	1 of 91	0.000220 ppb	217,479
CTWC - Unionville System*	Clinton, CT	1 of 78	0.000167 ppb	14,693

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

Utility	Location	Tests	Average level	People served
Manchester Water Department*	Manchester, CT	35 of 61	0.0412 ppb	51,066
Aqua NJ - Hamilton Square*	Hamilton, NJ	1 of 2	0.0400 ppb	39,128
Water Authority of Western Nassau	New Hyde Park, NY	1 of 11	0.0191 ppb	120,000
Laurens CPW*	Laurens, SC	1 of 6	0.0167 ppb	13,882
Artesian Water Company*	Newark, DE	22 of 115	0.0163 ppb	301,000
Smyrna Water Department	Smyrna, DE	2 of 8	0.0121 ppb	11,584
Joint Base Pearl Harbor-Hickam*	Jbpph, HI	5 of 13	0.0108 ppb	65,230
Honolulu-Windward-Pearl Harbor*	Honolulu, HI	92 of 317	0.00965 ppb	631,389
Marine Corps Base Hawaii	Kaneohe Bay, HI	92 of 317	0.00965 ppb	16,300
Naval Air Station Pensacola / Corry Station	Nas Pensacola, FL	2 of 8	0.00463 ppb	22,600
Port Washington WD	Port Washington, NY	3 of 41	0.00395 ppb	34,000
Newark Water Department	Newark, DE	1 of 11	0.00327 ppb	36,450
United Water New York*	West Nyack, NY	6 of 203	0.00141 ppb	270,950
Duxbury Water Department*	Duxbury, MA	1 of 29	0.00138 ppb	16,445
Southern Utilities	Tyler, TX	1 of 79	0.00127 ppb	59,154
Westbury WD	Westbury, NY	1 of 70	0.000800 ppb	20,500
Dothan Utilities*	Dothan, AL	1 of 90	0.000300 ppb	93,459
Waipahu-Ewa-Waianae	Honolulu, HI	1 of 91	0.000220 ppb	217,479
CTWC - Unionville System*	Clinton, CT	1 of 78	0.000167 ppb	14,693