Dalapon
Status: National drinking water standard exists
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
2015-2017:
26
states detected
450
utilities detected
7.1 million
people served
0
states over legal limit
0
utilities over legal limit
0
people served over legal limit
Health concerns for dalapon
Harm to the kidney
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 200 ppb
The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.
ppb = parts per billion
States reporting dalapon in drinking water
UTILITIES WITH CONTAMINATION | |||
---|---|---|---|
State | Utilities | People Served | |
Florida | 128 | 2,645,930 | |
Virginia | 11 | 1,013,772 | |
Texas | 93 | 853,630 | |
District Of Columbia | 3 | 648,882 | |
North Carolina | 34 | 473,736 | |
Louisiana | 44 | 468,914 | |
New York | 32 | 221,501 | |
Pennsylvania | 23 | 182,130 | |
Colorado | 33 | 173,168 | |
California | 3 | 119,272 | |
Delaware | 7 | 110,019 | |
Wisconsin | 3 | 59,239 | |
Iowa | 10 | 46,618 | |
Hawaii | 1 | 31,337 | |
Massachusetts | 2 | 30,605 | |
South Carolina | 3 | 16,607 | |
New Mexico | 2 | 10,693 | |
Missouri | 3 | 9,070 | |
West Virginia | 2 | 3,858 | |
Maryland | 2 | 3,807 | |
Idaho | 1 | 3,683 | |
North Dakota | 4 | 1,865 | |
Nevada | 1 | 1,420 | |
Washington | 2 | 419 | |
Minnesota | 1 | 288 | |
Vermont | 1 | 176 | |
New Hampshire | 1 | 30 |
Filtering technologies that reduce dalapon

Activated Carbon

Reverse Osmosis
Utilities with the highest amounts of dalapon, 2015-2017
Utility | Location | Tests | Average level | People served |
---|---|---|---|---|
Barrett Lake Mobile Home and Rv LLC | Dulzura, CA | 1 of 2 | 41.5 ppb | 150 |
Cattle Creek Wua | Snowmass, CO | 1 of 2 | 11.8 ppb | 47 |
Emma PWS* | Emma, MO | 1 of 4 | 9.88 ppb | 205 |
Concordia PWS* | Concordia, MO | 1 of 4 | 9.88 ppb | 2,500 |
Stagecoach S/d | Garner, NC | 4 of 8 | 6.94 ppb | 556 |
Placer Cwa - Bianchi Estates | Auburn, CA | 1 of 4 | 5.00 ppb | 122 |
City of Roseville* | Roseville, CA | 1 of 4 | 5.00 ppb | 119,000 |
Calam - West Placer | Sacramento, CA | 1 of 4 | 5.00 ppb | 3,188 |
Langston Estates S/d | Apex, NC | 3 of 7 | 4.07 ppb | 180 |
Palm and Pines Mobile Home Park | Felda, FL | 2 of 3 | 3.67 ppb | 150 |
Forest Pointe S/d | Gastonia, NC | 4 of 5 | 3.48 ppb | 95 |
Holiday Travel Park | Bunnell, FL | 3 of 3 | 2.93 ppb | 82 |
Pendleton Water Association | Many, LA | 10 of 12 | 2.45 ppb | 2,211 |
Cypress Mobile Home Park | Fort Pierce, FL | 5 of 6 | 2.43 ppb | 87 |
College Mobile Home Park | Orlando, FL | 4 of 7 | 2.39 ppb | 90 |
City of Nome | Nome, TX | 19 of 25 | 2.33 ppb | 753 |
Spring Point Homeowners Association | Deer Harbor, WA | 1 of 1 | 2.30 ppb | 90 |
Bard College | , NY | 1 of 1 | 2.20 ppb | 1,400 |
Southeast | Frostproof, FL | 2 of 2 | 2.10 ppb | 2,828 |
Fairview Union Water System* | Campti, LA | 22 of 32 | 2.07 ppb | 2,205 |
Springlake Village Water Treatment Plant | Kissimmee, FL | 4 of 4 | 2.05 ppb | 3,070 |
Port Buena Vista | East Palatka, FL | 3 of 5 | 1.96 ppb | 135 |
Wahpeton Water Supply | Wahpeton, IA | 4 of 4 | 1.90 ppb | 438 |
Camelot III | Derry, NH | 1 of 2 | 1.90 ppb | 30 |
Ayden, Town of | Ayden, NC | 1 of 7 | 1.90 ppb | 5,022 |
Walton Psd | Walton, WV | 1 of 1 | 1.85 ppb | 2,012 |
Peg Leg Cove Water System | Scott, LA | 12 of 12 | 1.81 ppb | 189 |
South Toledo Bend Water District* | Many, LA | 12 of 12 | 1.81 ppb | 5,802 |
Mcindoe Falls Fire District 3 | Mcindoe Falls, VT | 1 of 1 | 1.80 ppb | 176 |
Moriah Water District | Port Henry, NY | 1 of 1 | 1.77 ppb | 3,100 |
Buttonwood Bay Mobile Home Park | Sebring, FL | 6 of 7 | 1.70 ppb | 2,000 |
Bonita Water System | Bonita, LA | 2 of 4 | 1.50 ppb | 576 |
Mount Royal Common Property LLC | Crescent City, FL | 3 of 3 | 1.50 ppb | 86 |
De Witt Water Supply | Dewitt, IA | 1 of 1 | 1.50 ppb | 5,322 |
Manitou Springs, City of | Manitou Springs, CO | 2 of 3 | 1.50 ppb | 4,890 |
Sandy Point 480 Water System | Campti, LA | 6 of 12 | 1.50 ppb | 675 |
Waverly Water System | Lake Wales, FL | 5 of 8 | 1.48 ppb | 1,479 |
Quail Ridge Estates Water System | Gold River, LA | 2 of 6 | 1.43 ppb | 1,119 |
Orchard Park Wa Inc. | Canon City, CO | 2 of 4 | 1.43 ppb | 92 |
Hays Cattle and Trucking | Canon City, CO | 2 of 4 | 1.43 ppb | 90 |
Brookside, Town of | Brookside, CO | 2 of 4 | 1.43 ppb | 410 |
Canon City* | Canon City, CO | 2 of 4 | 1.43 ppb | 34,800 |
Silver Lake Institute - Castile Water District #1 | Castile, NY | 1 of 1 | 1.40 ppb | 440 |
Perry Village* | Perry, NY | 1 of 1 | 1.40 ppb | 4,348 |
Gardeau Water District | Castile, NY | 1 of 1 | 1.40 ppb | 60 |
Perry Center Water District | Perry, NY | 1 of 1 | 1.40 ppb | 150 |
Roche Harbor Water System Inc. | Friday Harbor, WA | 1 of 1 | 1.39 ppb | 329 |
Nys office of Children & Family Services | Highland, NY | 6 of 6 | 1.39 ppb | 470 |
Sirwa #3 (leon) | Creston, IA | 4 of 4 | 1.33 ppb | 2,395 |
Leon Water Supply* | Leon, IA | 4 of 4 | 1.33 ppb | 1,977 |
* 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 Dalapon, but it likely has the contaminant in its water supply.
Utility | Location | Tests | Average level | People served |
---|---|---|---|---|
City of Roseville* | Roseville, CA | 1 of 4 | 5.00 ppb | 119,000 |
Canon City* | Canon City, CO | 2 of 4 | 1.43 ppb | 34,800 |
City of Clermont | Clermont, FL | 3 of 6 | 1.23 ppb | 11,265 |
Buenaventura Lakes | Kissimmee, FL | 1 of 1 | 1.000 ppb | 16,569 |
Central | Winter Haven, FL | 15 of 24 | 0.929 ppb | 13,595 |
East Larimer County WD* | Fort Collins, CO | 2 of 4 | 0.900 ppb | 19,472 |
North Weld County WD* | Lucerne, CO | 2 of 4 | 0.900 ppb | 10,640 |
Pennsylvania American Water Company | Hummelstown, PA | 1 of 3 | 0.800 ppb | 43,005 |
Boynton Beach Water Treatment Plant | Boynton Beach, FL | 3 of 9 | 0.756 ppb | 102,512 |
City of Winter Park | Winter Park, FL | 7 of 14 | 0.729 ppb | 82,984 |
Boca Raton Water Treatment Plant | Boca Raton, FL | 1 of 2 | 0.700 ppb | 130,001 |
North Port Utilities | North Port, FL | 3 of 7 | 0.671 ppb | 42,477 |
City of Plant City Utility* | Plant City, FL | 2 of 6 | 0.650 ppb | 35,850 |
Riviera Beach Utility District* | Riviera Beach, FL | 5 of 13 | 0.636 ppb | 31,500 |
City of Mount Dora | Mount Dora, FL | 4 of 7 | 0.601 ppb | 29,996 |
City of New Smyrna Beach | New Smyrna Beach, FL | 1 of 2 | 0.600 ppb | 52,398 |
SIRWA #2 (Creston)* | Creston, IA | 2 of 2 | 0.600 ppb | 18,510 |
Bethlehem Water District No. 1* | Delmar, NY | 2 of 8 | 0.570 ppb | 62,062 |
Northeast* | Davenport, FL | 5 of 16 | 0.569 ppb | 59,183 |
City of Eden* | Eden, NC | 1 of 3 | 0.533 ppb | 15,527 |
Dan River Water Inc | Eden, NC | 1 of 3 | 0.533 ppb | 11,890 |
Daytona Beach* | Daytona Beach, FL | 2 of 8 | 0.500 ppb | 88,918 |
City of South Daytona | South Daytona, FL | 2 of 8 | 0.500 ppb | 12,437 |
City of Punta Gorda | Punta Gorda, FL | 1 of 3 | 0.500 ppb | 29,561 |
Beaver Falls Municipal Authority* | Beaver Falls, PA | 1 of 3 | 0.490 ppb | 50,000 |
Okeechobee Utility Authority | Okeechobee, FL | 5 of 8 | 0.483 ppb | 20,000 |
Orange County Utilities Department (OCUD) - South | Orlando, FL | 6 of 12 | 0.467 ppb | 91,196 |
New Kensington Municipal Authority | New Kensington, PA | 1 of 3 | 0.457 ppb | 47,800 |
City of Maitland | Maitland, FL | 2 of 7 | 0.443 ppb | 13,268 |
North Table Mountain WSD | Golden, CO | 1 of 5 | 0.440 ppb | 10,000 |
Pinellas County Utilities* | Clearwater, FL | 3 of 5 | 0.428 ppb | 426,877 |
Safety Harbor Water Department | Safety Harbor, FL | 3 of 5 | 0.428 ppb | 16,473 |
Pinellas Park Water Department | Pinellas Park, FL | 3 of 5 | 0.428 ppb | 43,426 |
Gretna Waterworks | Gretna, LA | 4 of 10 | 0.410 ppb | 17,802 |
Orange County Utilities Department (OCUD) - East | Orlando, FL | 4 of 7 | 0.409 ppb | 290,878 |
St Bernard Parish Waterworks | Chalmette, LA | 2 of 10 | 0.400 ppb | 44,000 |
Wilmington Water Department* | Wilmington, DE | 1 of 2 | 0.395 ppb | 107,976 |
City of Wildwood | Wildwood, FL | 2 of 11 | 0.382 ppb | 13,334 |
Assumption Parish Waterworks District 1* | Napoleonville, LA | 2 of 10 | 0.380 ppb | 22,862 |
Richmond County Water System* | Rockingham, NC | 3 of 14 | 0.379 ppb | 25,410 |
Sheboygan Water Utilities* | Sheboygan, WI | 1 of 1 | 0.370 ppb | 49,288 |
Natchitoches Water System* | Natchitoches, LA | 2 of 12 | 0.367 ppb | 30,000 |
City of Durham* | Durham, NC | 4 of 16 | 0.363 ppb | 265,472 |
Montgomery County MUD 60 | The Woodlands, TX | 13 of 48 | 0.346 ppb | 10,654 |
City of Port St. Joe | Port St. Joe, FL | 1 of 5 | 0.320 ppb | 12,806 |
St John Water District 1 | Laplace, LA | 2 of 12 | 0.300 ppb | 12,577 |
Toho Water Authority - Poinciana System | Kissimmee, FL | 1 of 3 | 0.297 ppb | 69,447 |
Montgomery Trace Water System | Navasota, TX | 8 of 49 | 0.284 ppb | 12,180 |
City of Goldsboro* | Goldsboro, NC | 1 of 4 | 0.275 ppb | 36,306 |
Wayne Water Districts Purchase | Goldsboro, NC | 1 of 4 | 0.275 ppb | 16,302 |
* 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 Dalapon, but it likely has the contaminant in its water supply.