Alachlor (Lasso)

Status: National drinking water standard exists

Alachlor is a widely used agricultural herbicide. It causes cancer in laboratory animals and may be carcinogenic to people.

2017-2019:

FOUND

FOUND ABOVE LEGAL LIMIT

states detected

utilities detected

2.9 million

people served

states over legal limit

utilities over legal limit

people served over legal limit

Health concerns for alachlor

Cancer

Harm to the liver

Harm to the kidney

Harm to the spleen

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for alachlor, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.

ppb = parts per billion

States reporting alachlor in drinking water

	UTILITIES WITH CONTAMINATION
State	Utilities	People Served
Ohio		10	1,253,214
Missouri		58	851,125
Louisiana		3	441,086
Florida		14	299,866
Georgia		1	4,180
Wisconsin		4	3,580
Kentucky		1	3,490
Iowa		1	3,068
Delaware		2	145

LESS

Filtering technologies that reduce alachlor

Utilities with the highest amounts of alachlor, 2017-2019

ALL UTILITIES

LARGE UTILITIES

Utility	Location	Tests	Average level	People served
Sussex Manor Mobile Home Park	Dagsboro, DE	3 of 3	0.627 ppb	49
Poynette Mobile Estates	Poynette, WI	24 of 24	0.416 ppb	150
Muscatatuck Urban Training Center	Butlerville, IN	1 of 7	0.214 ppb	40
Teal Point	Dover, DE	1 of 1	0.150 ppb	96
Sturgis Water Works	Sturgis, KY	1 of 14	0.143 ppb	3,490
Cave Spring*	Cave Spring, GA	1 of 2	0.122 ppb	4,180
St. Lucie Mobile Village	Indiantown, FL	1 of 2	0.1000 ppb	750
Harbour Ridge	Palm City, FL	1 of 2	0.1000 ppb	1,573
Imperial, City of	Imperial, NE	1 of 9	0.0939 ppb	2,071
Westwego Waterworks	Westwego, LA	3 of 25	0.0840 ppb	8,534
West Jefferson Waterworks District 2*	Jefferson, LA	3 of 25	0.0840 ppb	188,770
Williamsburg Public Water Supply	Williamsburg, IA	1 of 1	0.0800 ppb	3,068
Maysville PWS	Maysville, MO	2 of 24	0.0592 ppb	1,100
Bexley City PWS	Bexley, OH	6 of 42	0.0450 ppb	13,650
Lockbourne Village Public Water System	Lockbourne, OH	6 of 42	0.0450 ppb	275
Gahanna City PWS	Gahanna, OH	6 of 42	0.0450 ppb	33,323
Sanitary District #4	Columbus, OH	6 of 42	0.0450 ppb	8,575
Reynoldsburg City PWS	Reynoldsburg, OH	6 of 42	0.0450 ppb	35,893
Columbus Public Water System*	Columbus, OH	6 of 42	0.0450 ppb	1,159,817
Obetz Satellite 1 Public Water System	Obetz, OH	6 of 42	0.0450 ppb	192
Obetz Satellite 2 Public Water System	Obetz, OH	6 of 42	0.0450 ppb	1,150
Obetz Satellite 6 Public Water System	Obetz, OH	6 of 42	0.0450 ppb	73
Leonard Park Public Water System	Columbus, OH	6 of 42	0.0450 ppb	266
Frostproof, City of	Frostproof, FL	2 of 12	0.0433 ppb	3,550
City of Fort Meade	Fort Meade, FL	1 of 5	0.0400 ppb	5,455
Middlesex Water System	Raleigh, NC	1 of 19	0.0368 ppb	975
Dearborn PWS	Dearborn, MO	2 of 40	0.0360 ppb	496
Cass County Public Water Supply District 2*	Belton, MO	2 of 40	0.0360 ppb	3,725
Cass County Public Water Supply District 10	Peculiar, MO	2 of 40	0.0360 ppb	2,630
Weatherby Lake PWS	Weatherby Lake, MO	2 of 40	0.0360 ppb	1,923
Raytown Water Company	Raytown, MO	2 of 40	0.0360 ppb	21,135
Raymore	Raymore, MO	2 of 40	0.0360 ppb	21,167
Platte City PWS	Platte City, MO	2 of 40	0.0360 ppb	4,892
Peculiar PWS	Peculiar, MO	2 of 40	0.0360 ppb	4,800
Northmoor PWS	Northmoor, MO	2 of 40	0.0360 ppb	315
Platte County Public Water Supply District 9*	Platte City, MO	2 of 40	0.0360 ppb	1,505
Ferrelview PWS	Ferrelview, MO	2 of 40	0.0360 ppb	450
Lathrop PWS*	Lathrop, MO	2 of 40	0.0360 ppb	2,735
Kansas City*	Kansas City, MO	2 of 40	0.0360 ppb	471,767
Birmingham Village of	Birmingham, MO	2 of 40	0.0360 ppb	190
Belton*	Belton, MO	2 of 40	0.0360 ppb	23,290
Clay County Public Water Supply District 6	Kearney, MO	2 of 40	0.0360 ppb	4,700
Clay County Public Water Supply District 5	Liberty, MO	2 of 40	0.0360 ppb	1,000
Clay County Public Water Supply District 2*	Liberty, MO	2 of 40	0.0360 ppb	3,157
Clay County Public Water Supply District 9	Smithville, MO	2 of 40	0.0360 ppb	2,532
Platte County Cons Public Water Supply District 1	Waldron, MO	2 of 40	0.0360 ppb	5,025
Clay County Public Water Supply District 8	Kearney, MO	2 of 40	0.0360 ppb	1,904
Cass County Public Water Supply District 3	Raymore, MO	2 of 40	0.0360 ppb	2,736
Riverfront Rv Park	Grants Pass, OR	1 of 12	0.0333 ppb	65
Stanberry PWS*	Stanberry, MO	1 of 24	0.0313 ppb	1,200

* 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 Alachlor (Lasso), but it likely has the contaminant in its water supply.

Utility	Location	Tests	Average level	People served
West Jefferson Waterworks District 2*	Jefferson, LA	3 of 25	0.0840 ppb	188,770
Columbus Public Water System*	Columbus, OH	6 of 42	0.0450 ppb	1,159,817
Bexley City PWS	Bexley, OH	6 of 42	0.0450 ppb	13,650
Gahanna City PWS	Gahanna, OH	6 of 42	0.0450 ppb	33,323
Reynoldsburg City PWS	Reynoldsburg, OH	6 of 42	0.0450 ppb	35,893
Belton*	Belton, MO	2 of 40	0.0360 ppb	23,290
Kansas City*	Kansas City, MO	2 of 40	0.0360 ppb	471,767
Raymore	Raymore, MO	2 of 40	0.0360 ppb	21,167
Raytown Water Company	Raytown, MO	2 of 40	0.0360 ppb	21,135
Gretna, City of	Gretna, NE	4 of 23	0.0221 ppb	10,852
East Jefferson Waterworks District 1	Jefferson, LA	2 of 74	0.0203 ppb	243,782
Thomas Hill PWSD 1*	Moberly, MO	1 of 24	0.0200 ppb	10,315
Miramar (East & West) Plants	Miramar, FL	1 of 16	0.0163 ppb	127,700
Lee County Utilities*	Fort Myers, FL	1 of 25	0.00132 ppb	251,502
Gateway Services District	Fort Myers, FL	1 of 25	0.00132 ppb	12,717
City of Newport*	Newport, RI	1 of 116	0.000862 ppb	42,000
Portsmouth Water & Fire District	Portsmouth, RI	1 of 116	0.000862 ppb	16,864