1,2,3-Trichloropropane

Status: No national drinking water standard exists

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.

2013-2019:

FOUND

FOUND ABOVE HEALTH GUIDELINES

states detected

408

utilities detected

13 million

people served

states over health guideline

337

utilities over health guideline

7.5 million

people served over health guideline

Health concerns for 1,2,3-trichloropropane

Cancer

State and national drinking water standards and health guidelines

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

States reporting 1,2,3-trichloropropane in drinking water

	UTILITIES REPORTING ABOVE HEALTH GUIDELINES			UTILITIES WITH CONTAMINATION
State	Utilities	People Served		Utilities	People Served
California		154	3,029,801			190	5,440,006
Texas		107	552,899			131	2,845,325
New York		19	1,382,624			22	1,575,624
Hawaii		17	1,051,204			17	1,051,204
Pennsylvania		4	748,553			4	748,553
New Jersey		14	349,650			19	406,633
Connecticut		1	37,267			4	103,074
Florida		3	87,465			3	87,465
Alabama		4	84,860			4	84,860
Arizona		2	60,753			2	60,753
New Mexico		1	35,000			1	35,000
Maryland		2	30,843			2	30,843
Wisconsin		1	23,867			1	23,867
Delaware		3	21,408			3	21,408
Virginia		1	12,800			1	12,800
Ohio		2	6,525			2	6,525
South Carolina		1	412			1	412
Vermont		1	126			1	126

LESS

Filtering technologies that reduce 1,2,3-trichloropropane

Utilities with the highest amounts of 1,2,3-trichloropropane, 2013-2019

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Guilford Lake Estates	Tallmadge, OH	1 of 2	0.660 ppb	125
Ausable Heights Water System	Keeseville, NY	1 of 1	0.500 ppb	46
Ceres West Mobile Home Park	Ceres, CA	10 of 10	0.466 ppb	161
San Joaquin Estates Mutual Water Company	Bakersfield, CA	8 of 8	0.323 ppb	165
Elkhorn Rd. Ws #04	Watsonville, CA	9 of 9	0.286 ppb	60
Sierra Vista Association	Delano, CA	9 of 9	0.278 ppb	44
Son Shine Properties	Edison, CA	9 of 9	0.243 ppb	438
Mililani	Honolulu, HI	16 of 48	0.243 ppb	50,573
Maunaolu Plantation	Wailuku, HI	19 of 34	0.230 ppb	100
Four Seasons	Austin, TX	1 of 7	0.229 ppb	969
City of Livingston	Livingston, CA	223 of 260	0.183 ppb	14,894
Sumter-wessex S/d	Sumter, SC	9 of 23	0.183 ppb	412
City of Santa Rosa	Santa Rosa, TX	1 of 8	0.183 ppb	2,883
Wilson Road Water Community	Bakersfield, CA	9 of 10	0.179 ppb	72
Waialua	Honolulu, HI	12 of 26	0.152 ppb	9,996
Waipio Heights	Honolulu, HI	31 of 51	0.135 ppb	11,516
Lahaina	Wailuku, HI	268 of 613	0.130 ppb	20,065
Silver Lake Institute - Castile Water District #1	, NY	1 of 4	0.125 ppb	440
Gardeau Water District	Castile, NY	1 of 4	0.125 ppb	60
Perry Village*	, NY	1 of 4	0.125 ppb	4,348
Perry Center Water District	Perry, NY	1 of 4	0.125 ppb	150
Victory Mutual Water Company	Bakersfield, CA	13 of 18	0.114 ppb	740
Makawao	Wailuku, HI	67 of 87	0.113 ppb	29,868
Waipahu-Ewa-Waianae	Honolulu, HI	78 of 256	0.101 ppb	217,479
Haiku Town Water Association, Inc.	Kahului, HI	3 of 3	0.1000 ppb	20
City of La Villa	La Villa, TX	1 of 8	0.0950 ppb	2,985
City of Shafter	Shafter, CA	259 of 303	0.0928 ppb	16,928
Kaanapali	Waikoloa, HI	9 of 36	0.0897 ppb	8,000
Tully Mobile Estates	Modesto, CA	33 of 56	0.0847 ppb	40
Del Oro Water Company - Country Estates District	Chico, CA	8 of 8	0.0829 ppb	297
Greenlawn WD	Greenlawn, NY	8 of 20	0.0819 ppb	42,000
Three Palms Mobilehome Park	Sacramento, CA	7 of 7	0.0797 ppb	300
Harris County Fresh Water Supply District 1a	Houston, TX	1 of 10	0.0790 ppb	1,620
City of Moody	Moody, TX	1 of 8	0.0775 ppb	1,866
City of Lyford	Lyford, TX	1 of 8	0.0738 ppb	2,611
Camp Stover	Jbpph, HI	13 of 24	0.0715 ppb	595
Wahiawa*	Honolulu, HI	13 of 24	0.0715 ppb	23,348
Llanas Camp Four Water System	Shafter, CA	6 of 6	0.0697 ppb	71
Double L Mobile Ranch Park	Fresno, CA	2 of 2	0.0690 ppb	80
Happy Acres Development	Honesdale, PA	1 of 4	0.0650 ppb	168
Chino Basin Desalter Authority - Desalter 1*	Ontario, CA	149 of 445	0.0645 ppb	0
Northcrest Addition	Keene, TX	1 of 19	0.0632 ppb	861
Smithwick Mills Community	Austin, TX	1 of 12	0.0617 ppb	216
City of Marble Falls	Marble Falls, TX	1 of 8	0.0588 ppb	6,958
Kunia Village	Kunia, HI	2 of 6	0.0567 ppb	650
Brock Mutual Water Company	Bakersfield, CA	74 of 77	0.0563 ppb	511
Farm-to-market Associates	Brewster, NY	1 of 9	0.0556 ppb	48
Springhill Mobile Home Park	Wappingers Falls, NY	1 of 9	0.0556 ppb	150
City of Wasco	Wasco, CA	162 of 176	0.0505 ppb	21,170
Kalaheo-Koloa	Lihue, HI	23 of 61	0.0502 ppb	12,660

* 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	16 of 48	0.243 ppb	50,573
City of Livingston	Livingston, CA	223 of 260	0.183 ppb	14,894
Waipio Heights	Honolulu, HI	31 of 51	0.135 ppb	11,516
Lahaina	Wailuku, HI	268 of 613	0.130 ppb	20,065
Makawao	Wailuku, HI	67 of 87	0.113 ppb	29,868
Waipahu-Ewa-Waianae	Honolulu, HI	78 of 256	0.101 ppb	217,479
City of Shafter	Shafter, CA	259 of 303	0.0928 ppb	16,928
Greenlawn WD	Greenlawn, NY	8 of 20	0.0819 ppb	42,000
Wahiawa*	Honolulu, HI	13 of 24	0.0715 ppb	23,348
City of Wasco	Wasco, CA	162 of 176	0.0505 ppb	21,170
Kalaheo-Koloa	Lihue, HI	23 of 61	0.0502 ppb	12,660
Immokalee Water	Immokalee, FL	1 of 6	0.0467 ppb	25,608
City of Atwater	Atwater, CA	150 of 207	0.0419 ppb	29,050
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	10,725
City of Parlier	Parlier, CA	81 of 130	0.0340 ppb	12,058
City of Hemet	Hemet, CA	14 of 33	0.0328 ppb	20,212
California Water Service (CWS) - North Garden*	San Jose, CA	364 of 614	0.0328 ppb	24,167
Vinton	Vinton, VA	3 of 3	0.0320 ppb	12,800
Arvin Community Services District	Arvin, CA	63 of 147	0.0310 ppb	19,000
City of Bakersfield	Bakersfield, CA	196 of 485	0.0304 ppb	138,309
Riverhead WD*	Riverhead, NY	2 of 22	0.0282 ppb	35,000
Maple Shade Water Department*	Maple Shade, NJ	138 of 199	0.0258 ppb	19,400
City of Salisbury	Salisbury, MD	2 of 6	0.0243 ppb	30,343
City of Ceres	Ceres, CA	182 of 345	0.0239 ppb	42,666
Moorestown Water Department	Moorestown, NJ	15 of 45	0.0228 ppb	20,700
California State University Fresno	Fresno, CA	3 of 17	0.0212 ppb	23,000
Menomonee Falls WW - Surface Water	Menomonee Falls, WI	1 of 18	0.0183 ppb	23,867
East Pasadena Water Company	Pasadena, CA	37 of 51	0.0161 ppb	10,978
City of Leander	Leander, TX	1 of 11	0.0145 ppb	43,764
Lamont Public Utility District	Bakersfield, CA	90 of 197	0.0136 ppb	18,290
Suffolk County Water Authority*	Bayshore, NY	32 of 488	0.0126 ppb	1,100,000
St James WD	St James, NY	32 of 488	0.0126 ppb	10,587
Smithtown WD	Kings Park, NY	32 of 488	0.0126 ppb	19,635
City of South Pasadena	South Pasadena, CA	58 of 122	0.0119 ppb	25,899
Wallingford Water Department	Wallingford, CT	1 of 43	0.0116 ppb	37,267
Rubidoux Community SD	Rubidoux, CA	53 of 155	0.0115 ppb	26,150
Dix Hills Water District	Huntington, NY	1 of 18	0.0111 ppb	34,522
City of Turlock*	Turlock, CA	54 of 151	0.0109 ppb	64,215
California Water Service - South San Francisco	San Jose, CA	60 of 149	0.0107 ppb	56,110
Lihue-Kapaa	Lihue, HI	14 of 95	0.0102 ppb	34,854
City of Chino	Chino, CA	85 of 312	0.0100 ppb	18,907
City of Ripon	Ripon, CA	4 of 54	0.00963 ppb	14,915
Daphne*	Daphne, AL	6 of 33	0.00939 ppb	33,372
East Niles CSD	Bakersfield, CA	16 of 73	0.00934 ppb	26,000
City of Manteca	Manteca, CA	159 of 386	0.00906 ppb	66,451
Aqua Pennsylvania Main System*	Bryn Mawr, PA	4 of 52	0.00829 ppb	747,460
City of Killeen	Killeen, TX	1 of 22	0.00773 ppb	140,806
City of Belton	Belton, TX	1 of 22	0.00773 ppb	21,214
City of Copperas Cove*	Copperas Cove, TX	1 of 22	0.00773 ppb	33,919