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.
2017-2019:
FOUND
FOUND ABOVE LEGAL LIMIT
33
states detected
484
utilities detected
7.9 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 | 108 | 3,128,060 | |
| Louisiana | 60 | 1,204,773 | |
| Arizona | 2 | 494,928 | |
| North Carolina | 23 | 423,856 | |
| Texas | 62 | 380,721 | |
| Nevada | 3 | 329,182 | |
| New York | 39 | 264,992 | |
| Oklahoma | 31 | 256,316 | |
| Virginia | 4 | 197,483 | |
| Pennsylvania | 20 | 187,355 | |
| Colorado | 36 | 171,340 | |
| Alabama | 8 | 162,909 | |
| Illinois | 6 | 139,427 | |
| Michigan | 21 | 112,654 | |
| Massachusetts | 2 | 108,384 | |
| Wisconsin | 3 | 59,239 | |
| South Carolina | 4 | 46,479 | |
| Hawaii | 1 | 34,854 | |
| Iowa | 6 | 31,916 | |
| Kentucky | 2 | 31,313 | |
| West Virginia | 6 | 18,896 | |
| Minnesota | 2 | 17,435 | |
| Maryland | 3 | 17,000 | |
| Missouri | 3 | 9,509 | |
| Arkansas | 4 | 9,325 | |
| Washington | 9 | 8,785 | |
| Delaware | 5 | 3,120 | |
| Indiana | 2 | 2,270 | |
| North Dakota | 4 | 1,865 | |
| Vermont | 1 | 176 | |
| Montana | 1 | 172 | |
| California | 1 | 150 | |
| New Hampshire | 2 | 85 | |
MORE
LESS
Filtering technologies that reduce dalapon
Activated Carbon
Reverse Osmosis
Utilities with the highest amounts of dalapon, 2017-2019
ALL UTILITIES
LARGE UTILITIES
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Barrett Lake Mobile Home and Rv LLC | Dulzura, CA | 1 of 2 | 41.5 ppb | 150 |
| Mooringsport Water System | Mooringsport, LA | 2 of 4 | 30.5 ppb | 956 |
| Bel-di-gil Water System | Belcher, LA | 4 of 12 | 20.3 ppb | 1,132 |
| Westwego Waterworks | Westwego, LA | 2 of 2 | 20.3 ppb | 8,534 |
| Sandy Point 480 Water System | Campti, LA | 14 of 26 | 14.3 ppb | 675 |
| Clarence Water System | Clarence, LA | 6 of 24 | 11.1 ppb | 672 |
| Natchitoches Water System* | Natchitoches, LA | 6 of 24 | 11.1 ppb | 30,000 |
| Fairview Union Water System* | Coushatta, LA | 28 of 46 | 10.5 ppb | 2,205 |
| Assumption Parish Waterworks District 1* | Napoleonville, LA | 12 of 26 | 6.98 ppb | 22,862 |
| Ascension Consolidated Utility District 1 | Gonzales, LA | 12 of 26 | 6.98 ppb | 1,869 |
| Oil City Water Works | Oil City, LA | 12 of 20 | 5.71 ppb | 2,199 |
| Dixie Garden Water Supply | St. Louis, LA | 6 of 22 | 5.53 ppb | 570 |
| Dixie Garden - Kings Highway Water System | St. Louis, LA | 6 of 22 | 5.53 ppb | 100 |
| Brady Mobile Home Park | Bossier, LA | 6 of 22 | 5.53 ppb | 96 |
| Wildwood South Water System | St. Louis, LA | 6 of 22 | 5.53 ppb | 549 |
| Glen Leaf Mobile Home Community | Shreveport, LA | 6 of 22 | 5.53 ppb | 564 |
| Shreveport Water System* | Shreveport, LA | 6 of 22 | 5.53 ppb | 201,000 |
| Huntington Mobile Home Park Water System | Shreveport, LA | 6 of 22 | 5.53 ppb | 291 |
| Barksdale Afb Water System | Barksdale Afb, LA | 6 of 22 | 5.53 ppb | 13,000 |
| Pinecrest Mobile Home Village | Shreveport, LA | 6 of 22 | 5.53 ppb | 759 |
| Stonegate Manufactured Home Community | Shreveport, LA | 6 of 22 | 5.53 ppb | 491 |
| Pendleton Water Association | Many, LA | 20 of 22 | 5.13 ppb | 2,328 |
| Lebanon Water Authority* | Lebanon, PA | 1 of 11 | 5.07 ppb | 57,000 |
| Fort Indiantown Gap | Annville, PA | 1 of 11 | 5.07 ppb | 3,100 |
| Cornwall Borough Municipal Authority | Lebanon, PA | 1 of 11 | 5.07 ppb | 3,051 |
| Eagle Lakes WTP | Bunnell, FL | 4 of 4 | 5.00 ppb | 231 |
| Emma PWS* | Emma, MO | 1 of 8 | 4.94 ppb | 205 |
| Concordia PWS* | Concordia, MO | 1 of 8 | 4.94 ppb | 2,500 |
| Stagecoach S/d | Cary, NC | 4 of 12 | 4.63 ppb | 561 |
| Hillside Water and Sewage LLC | Shreveport, LA | 2 of 20 | 4.60 ppb | 324 |
| Lakeview Water System | Shreveport, LA | 2 of 20 | 4.60 ppb | 1,971 |
| Blanchard Water System* | Blanchard, LA | 2 of 20 | 4.60 ppb | 13,650 |
| Town of Ridgecrest Water Supply | Ridgecrest, LA | 4 of 8 | 4.50 ppb | 855 |
| Town of Clayton Water System | Clayton, LA | 4 of 8 | 4.50 ppb | 723 |
| Florida Pines Mobile Home Park | Venice, FL | 1 of 2 | 4.45 ppb | 280 |
| Town of Greenwood Water System | Greenwood, LA | 10 of 26 | 4.13 ppb | 5,205 |
| Peg Leg Cove Water System | Scott, LA | 20 of 24 | 4.04 ppb | 189 |
| South Toledo Bend Water District* | Many, LA | 20 of 24 | 4.04 ppb | 5,802 |
| Alex | Alex, OK | 1 of 1 | 3.91 ppb | 635 |
| Osage County Rural Water District # 20 (hulah) | Bartlesville, OK | 1 of 1 | 3.81 ppb | 350 |
| St. Mary Parish Water Works District 5 | Centerville, LA | 6 of 22 | 3.79 ppb | 7,500 |
| Palm and Pines Mobile Home Park | Felda, FL | 6 of 7 | 3.73 ppb | 150 |
| Vivian Water System | Vivian, LA | 6 of 28 | 3.54 ppb | 3,900 |
| Water & Sewer Commission 4 Of St. Mary* | Charenton, LA | 4 of 22 | 3.50 ppb | 9,348 |
| St. Martin Parish Industrial Park Ws | Baldwin, LA | 4 of 22 | 3.50 ppb | 2,500 |
| Franklin Water Supply | Franklin, LA | 8 of 24 | 3.43 ppb | 8,500 |
| Big Cypress Park Headquarters | Ochopee, FL | 3 of 5 | 3.42 ppb | 100 |
| Mansfield Water System* | Mansfield, LA | 12 of 22 | 3.41 ppb | 6,354 |
| Highway 513 Water Supply | Mansfield, LA | 12 of 22 | 3.41 ppb | 120 |
| Patterson Water System | Patterson, LA | 6 of 26 | 3.26 ppb | 7,254 |
* 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 |
|---|---|---|---|---|
| Natchitoches Water System* | Natchitoches, LA | 6 of 24 | 11.1 ppb | 30,000 |
| Assumption Parish Waterworks District 1* | Napoleonville, LA | 12 of 26 | 6.98 ppb | 22,862 |
| Shreveport Water System* | Shreveport, LA | 6 of 22 | 5.53 ppb | 201,000 |
| Barksdale Afb Water System | Barksdale Afb, LA | 6 of 22 | 5.53 ppb | 13,000 |
| Lebanon Water Authority* | Lebanon, PA | 1 of 11 | 5.07 ppb | 57,000 |
| Blanchard Water System* | Blanchard, LA | 2 of 20 | 4.60 ppb | 13,650 |
| City of Roseville* | Roseville, CA | 1 of 7 | 2.86 ppb | 119,000 |
| West Jefferson Waterworks District 2* | Jefferson, LA | 5 of 21 | 2.79 ppb | 188,770 |
| Gretna Waterworks | Gretna, LA | 8 of 20 | 2.74 ppb | 17,802 |
| Thibodaux Waterworks | Thibodaux, LA | 6 of 22 | 2.68 ppb | 15,810 |
| St John Water District 1* | Laplace, LA | 8 of 24 | 2.61 ppb | 12,577 |
| St Charles Water District 1 East Bank | Luling, LA | 8 of 26 | 2.52 ppb | 52,879 |
| Belle Chasse Water District | Belle Chasse, LA | 4 of 20 | 2.49 ppb | 17,391 |
| East Jefferson Waterworks District 1 | Jefferson, LA | 12 of 60 | 2.20 ppb | 243,782 |
| West Monroe Water System | West Monroe, LA | 10 of 26 | 2.12 ppb | 15,930 |
| Morgan City Water System* | Morgan City, LA | 2 of 26 | 2.09 ppb | 12,703 |
| New Orleans Algiers Water Works | New Orleans, LA | 2 of 20 | 2.03 ppb | 52,785 |
| Schriever Water Treatment Service Area* | Houma, LA | 6 of 22 | 1.96 ppb | 97,152 |
| Lafourche Water District 1 | Lockport, LA | 4 of 46 | 1.94 ppb | 78,760 |
| Houma Water Treatment Service Area | Houma, LA | 6 of 22 | 1.84 ppb | 31,560 |
| St Bernard Parish Waterworks | Chalmette, LA | 6 of 22 | 1.70 ppb | 44,000 |
| New Orleans Carrollton Waterworks | New Orleans, LA | 4 of 46 | 1.69 ppb | 291,044 |
| Village of Parks Water System | Parks, LA | 4 of 12 | 1.30 ppb | 12,360 |
| Bayou Liberty Water Association | Slidell, LA | 6 of 14 | 0.871 ppb | 10,500 |
| Yukon | Yukon, OK | 1 of 3 | 0.857 ppb | 22,498 |
| Palm Coast Utility* | Palm Coast, FL | 1 of 14 | 0.786 ppb | 80,325 |
| City of Plant City Utility* | Plant City, FL | 12 of 18 | 0.776 ppb | 36,889 |
| Bethlehem Water District No. 1* | Delmar, NY | 4 of 14 | 0.704 ppb | 62,062 |
| Riviera Beach Utility District* | Riviera Beach, FL | 9 of 19 | 0.660 ppb | 34,700 |
| El Reno* | El Reno, OK | 1 of 6 | 0.657 ppb | 16,212 |
| City of Winter Park | Winter Park, FL | 13 of 28 | 0.634 ppb | 82,984 |
| Central | Winter Haven, FL | 19 of 44 | 0.632 ppb | 13,595 |
| City of Clermont | Clermont, FL | 4 of 15 | 0.620 ppb | 11,628 |
| Northwest | Lakeland, FL | 14 of 44 | 0.586 ppb | 28,082 |
| North Port Utilities | North Port, FL | 4 of 11 | 0.573 ppb | 49,014 |
| City of Port St. Joe | Port St. Joe, FL | 4 of 10 | 0.570 ppb | 13,836 |
| Richmond County Water System* | Rockingham, NC | 7 of 23 | 0.570 ppb | 21,755 |
| SIRWA #2 (Creston)* | Creston, IA | 3 of 3 | 0.567 ppb | 18,510 |
| Lake Forest | Lake Forest, IL | 2 of 8 | 0.556 ppb | 19,375 |
| City of New Smyrna Beach | New Smyrna Beach, FL | 2 of 4 | 0.538 ppb | 63,303 |
| Colbert County Rural Water System* | Tuscumbia, AL | 1 of 3 | 0.533 ppb | 10,731 |
| Southwest Ouachita Waterworks Inc. | West Monroe, LA | 12 of 32 | 0.508 ppb | 10,092 |
| North Myrtle Beach | N Myrtle Beach, SC | 2 of 5 | 0.500 ppb | 29,872 |
| City of Bartow | Bartow, FL | 8 of 15 | 0.488 ppb | 21,501 |
| Northeast* | Davenport, FL | 10 of 39 | 0.426 ppb | 60,557 |
| City of Wildwood | Wildwood, FL | 5 of 23 | 0.412 ppb | 22,799 |
| Wilmington Water Department* | Wilmington, DE | 4 of 13 | 0.399 ppb | 107,976 |
| City of South Daytona | South Daytona, FL | 7 of 20 | 0.397 ppb | 12,500 |
| Daytona Beach* | Daytona Beach, FL | 7 of 20 | 0.397 ppb | 76,700 |
| Pinellas Park Water Department | Pinellas Park, FL | 6 of 13 | 0.393 ppb | 48,939 |
* 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.