Overview

1,2,3-Trichloropropane is a potent carcinogen that contaminates drinking water in agricultural regions where it was historically used as soil fumigant. Click here to read more about carcinogenic VOCs.

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.0007 ppb

The EWG Health Guideline of 0.0007 ppb for 1,2,3-trichloropropane 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 cancer.

ppb = parts per billion

National Standard Exists

Health Concerns:

Cancer

Want to remove
1,2,3-Trichloropropane from your water?

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Activated Carbon,

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1,2,3-Trichloropropane around the Country

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES		UTILITIES WITH CONTAMINATION
State	Utilities	People Served	Utilities	People Served
California		113	1,598,849		216	6,218,615
New Jersey		15	83,437		67	2,460,380
Texas		179	1,507,370		194	1,815,455
New York		29	1,425,100		32	1,618,100
Hawaii		18	1,073,321		18	1,073,321
Pennsylvania		2	760,361		2	760,361
Alabama		25	311,314		25	311,314
Connecticut		3	119,793		6	185,744
Florida		3	87,695		3	87,695
Massachusetts		5	77,274		5	77,274
Arizona		1	50,770		1	50,770
New Mexico		1	35,000		1	35,000
Maryland		1	30,343		1	30,343
Montana		1	483		1	483
South Carolina		1	412		1	412

SHOW LESS

Utilities with the highest amounts of 1,2,3-trichloropropane, 2013-2023

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Treasure State Acres Wua	Helena, MT	1 of 2	0.735 ppb	483
Pine Tree Mobile Home Park	Stamford, NY	1 of 1	0.500 ppb	44
Elkhorn Rd. Ws #04	Watsonville, CA	23 of 23	0.338 ppb	60
Sierra Vista Association	Clovis, CA	22 of 22	0.319 ppb	44
San Joaquin Estates Mutual Water Company	Bakersfield, CA	25 of 25	0.296 ppb	165
Smithwick Mills Community	Austin, TX	4 of 12	0.274 ppb	216
Perry Village*	Perry, NY	3 of 6	0.250 ppb	4,348
Gardeau Water District	Silver Springs, NY	3 of 6	0.250 ppb	60
Ausable Heights Water System	Keeseville, NY	1 of 2	0.250 ppb	46
Twin Water Authority	Guin, AL	1 of 2	0.250 ppb	804
Silver Lake Institute - Castile Water District #1	Castile, NY	3 of 6	0.250 ppb	440
Perry Center Water District	Perry, NY	3 of 6	0.250 ppb	150
Son Shine Properties	Edison, CA	24 of 24	0.238 ppb	438
Maunaolu Plantation	Wailuku, HI	24 of 42	0.233 ppb	100
Mililani	Honolulu, HI	19 of 65	0.200 ppb	50,573
City of Santa Rosa	Santa Rosa, TX	1 of 8	0.183 ppb	2,883
Harpersville Water Board	Harpersville, AL	1 of 3	0.167 ppb	2,313
Ragland (the Water Works Board of The, Town of)	Ragland, AL	1 of 3	0.167 ppb	3,162
Fayetteville Water Authority	Sylacauga, AL	2 of 6	0.167 ppb	5,694
City of Livingston	Livingston, CA	283 of 376	0.154 ppb	14,894
Wilson Road Water Community	Bakersfield, CA	26 of 26	0.134 ppb	66
Lahaina	Wailuku, HI	325 of 737	0.119 ppb	20,065
Del Oro Water Company - Country Estates District	Chico, CA	23 of 23	0.113 ppb	297
Irondale Water System	Irondale, AL	7 of 32	0.109 ppb	10,098
Pell City Water Works	Pell City, AL	3 of 14	0.107 ppb	15,402
Harris County Fresh Water Supply District 1a	Houston, TX	1 of 8	0.0988 ppb	2,560
Greenlawn WD	Greenlawn, NY	9 of 21	0.0968 ppb	42,000
City of La Villa	La Villa, TX	1 of 8	0.0950 ppb	2,781
Childersburg Water & Sewer Board	Childersburg, AL	5 of 27	0.0926 ppb	9,744
Mattapoisett River Valley WD*	Mattapoisett, MA	1 of 13	0.0923 ppb	0
Makawao	Wailuku, HI	56 of 76	0.0915 ppb	29,868
Springville Water Works	Springville, AL	4 of 24	0.0833 ppb	6,015
Leeds Water Board	Leeds, AL	13 of 83	0.0783 ppb	21,300
City of Moody	Moody, TX	1 of 8	0.0775 ppb	1,866
Waipio Heights	Honolulu, HI	25 of 54	0.0764 ppb	11,516
Llanas Camp Four Water System	Shafter, CA	19 of 19	0.0763 ppb	31
City of Talladega Water and Sewer Board*	Talladega, AL	19 of 126	0.0754 ppb	20,250
Waldo Water System	Talladega, AL	19 of 126	0.0754 ppb	417
Northcrest Addition	Keene, TX	1 of 16	0.0750 ppb	738
Tillison Bend Water Authority	Gadsden, AL	2 of 14	0.0714 ppb	1,065
Glencoe Water Works Board*	Glencoe, AL	2 of 14	0.0714 ppb	6,450
Three Palms Mobilehome Park	Sacramento, CA	24 of 24	0.0713 ppb	347
Victory Mutual Water Company	Bakersfield, CA	58 of 88	0.0697 ppb	740
Haiku Town Water Association, Inc.	Kahului, HI	7 of 9	0.0678 ppb	20
Foxboro Water Department*	Foxborough, MA	4 of 43	0.0674 ppb	16,924
Wattsville Water Authority	Ragland, AL	2 of 15	0.0667 ppb	5,511
Sumter-wessex S/d	Sumter, SC	4 of 24	0.0658 ppb	412
Farm-to-market Associates	Brewster, NY	1 of 8	0.0625 ppb	48
Jacksonville Utilities	Jacksonville, AL	2 of 16	0.0625 ppb	13,809
San Pedro Village	Wimberley, TX	2 of 4	0.0625 ppb	102

* 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 1,2,3-Trichloropropane, but it likely has the contaminant in its water supply.

Utility	Location	Tests	Average level	People served
Mililani	Honolulu, HI	19 of 65	0.200 ppb	50,573
City of Livingston	Livingston, CA	283 of 376	0.154 ppb	14,894
Lahaina	Wailuku, HI	325 of 737	0.119 ppb	20,065
Irondale Water System	Irondale, AL	7 of 32	0.109 ppb	10,098
Pell City Water Works	Pell City, AL	3 of 14	0.107 ppb	15,402
Greenlawn WD	Greenlawn, NY	9 of 21	0.0968 ppb	42,000
Makawao	Wailuku, HI	56 of 76	0.0915 ppb	29,868
Leeds Water Board	Leeds, AL	13 of 83	0.0783 ppb	21,300
Waipio Heights	Honolulu, HI	25 of 54	0.0764 ppb	11,516
City of Talladega Water and Sewer Board*	Talladega, AL	19 of 126	0.0754 ppb	20,250
Foxboro Water Department*	Foxborough, MA	4 of 43	0.0674 ppb	16,924
Jacksonville Utilities	Jacksonville, AL	2 of 16	0.0625 ppb	13,809
Wahiawa*	Honolulu, HI	11 of 21	0.0610 ppb	23,348
City of Killeen	Killeen, TX	2 of 26	0.0592 ppb	151,261
City of Harker Heights	Harker Heights, TX	2 of 26	0.0592 ppb	34,834
US Army Fort Cavazos	Fort Hood, TX	2 of 26	0.0592 ppb	35,669
City of Belton	Belton, TX	2 of 26	0.0592 ppb	25,466
City of Copperas Cove*	Copperas Cove, TX	2 of 26	0.0592 ppb	37,225
Oneonta Utilities Board*	Oneonta, AL	5 of 43	0.0581 ppb	19,737
Waterbury Water Department*	Waterbury, CT	1 of 9	0.0556 ppb	107,271
US Army Aviation and Missile Command	Redstone Arsenal, AL	3 of 24	0.0548 ppb	38,700
Waipahu-Ewa-Waianae	Honolulu, HI	65 of 257	0.0532 ppb	217,479
City of Wasco	Wasco, CA	349 of 375	0.0475 ppb	22,608
Immokalee Water	Immokalee, FL	1 of 6	0.0467 ppb	25,838
City of Shafter	Shafter, CA	382 of 679	0.0447 ppb	21,036
University of New Mexico	Albuquerque, NM	1 of 2	0.0395 ppb	35,000
City of Horseshoe Bay*	Horseshoe Bay, TX	1 of 16	0.0394 ppb	12,395
City of Parlier	Parlier, CA	97 of 134	0.0387 ppb	14,576
Kempner WSC*	Kempner, TX	4 of 29	0.0376 ppb	20,550
Salado Water Supply Corporation*	Salado, TX	4 of 29	0.0376 ppb	10,056
City of Salisbury	Salisbury, MD	2 of 4	0.0365 ppb	30,343
Riverhead WD*	Riverhead, NY	3 of 23	0.0313 ppb	35,000
City of Atwater	Atwater, CA	181 of 397	0.0280 ppb	29,479
Moorestown Water Department	Moorestown, NJ	19 of 75	0.0271 ppb	20,700
City of Taylor*	Taylor, TX	1 of 8	0.0263 ppb	20,622
Kalaheo-Koloa	Lihue, HI	18 of 76	0.0258 ppb	12,660
City of Manor	Manor, TX	1 of 4	0.0200 ppb	19,620
Maple Shade Water Department*	Maple Shade, NJ	60 of 85	0.0195 ppb	19,400
Pelham Water Works*	Pelham, AL	1 of 26	0.0192 ppb	38,703
Aqua Pa Hatboro	Bryn Mawr, PA	177 of 490	0.0168 ppb	12,901
Aqua Pennsylvania Main System*	Bryn Mawr, PA	177 of 490	0.0168 ppb	747,460
Marshfield Water Department*	Marshfield, MA	3 of 170	0.0165 ppb	34,000
City of Lockhart	Lockhart, TX	1 of 11	0.0164 ppb	14,742
California Water Service (CWS) - North Garden*	San Jose, CA	210 of 702	0.0153 ppb	22,620
City of Big Spring*	Big Spring, TX	1 of 12	0.0150 ppb	27,282
City of Leander*	Leander, TX	1 of 11	0.0145 ppb	98,330
Galveston County WCID 1	Dickinson, TX	2 of 28	0.0139 ppb	29,832
Harris County Municipal Utility District 368	Houston, TX	2 of 11	0.0127 ppb	11,835
Suffolk County Water Authority*	Hauppauge, NY	31 of 484	0.0126 ppb	1,100,000
St James WD	Kings Park, NY	31 of 484	0.0126 ppb	10,587

EWG’s Tap
Water Database

Nitrate in
Tap Water

CONTAMINANT

1,2,3-Trichloropropane

STATES DETECTED

15

serves

15 million

utilities detected

573

states detected

15

serves

7.2 million

utilities detected

397

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to remove
1,2,3-Trichloropropane from your water?

1,2,3-Trichloropropane around the Country

Utilities with the highest amounts of 1,2,3-trichloropropane, 2013-2023

Know the Standards

Take Action

Need help finding a filter?

We’re in this together

Protect your water

EWG’s TapWater Database

CONTAMINANT

1,2,3-Trichloropropane

STATES DETECTED

15

serves

15 million

utilities detected

573

states detected

15

serves

7.2 million

utilities detected

397

Overview

State, National, and Health Guidelines for Drinking Water

National Standard Exists

Health Concerns:

Want to remove1,2,3-Trichloropropane from your water?

1,2,3-Trichloropropane around the Country

Utilities with the highest amounts of 1,2,3-trichloropropane, 2013-2023

Know the Standards

Take Action

Need help finding a filter?

We’re in this together

Protect your water

EWG’s Tap
Water Database

Want to remove
1,2,3-Trichloropropane from your water?