The Power of Information

National Drinking Water Database


713 systems serving 2,929,506 people

This drinking water quality report shows results of tests conducted by water utilities in Arkansas, provided to the Environmental Working Group (EWG) by the Arkansas Department of Health. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results from 45 states and the District of Columbia. Water utilities nationwide detected more than 300 pollutants between 2004 and 2009. More than half of these chemicals are unregulated, legal in any amount. Despite this widespread contamination, the federal government invests few resources in protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes drinking water quality for this state.

Water Utilities
Population Served
Detected Chemicals
Exceed health guidelines*
Exceed Legal Limits*
Unregulated chemicals detected
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

43 Contaminants Exceeding Health Based Limits

Contaminants detected in Arkansas drinking water above health guidelines, according to an Environmental Working Group analysis of data obtained from state water authorities

Number of Systems
At Any Level Above Health Limits At Any Level Above Health Limits
Total haloacetic acids (HAAs)2,869,2742,869,274662662
Dichloroacetic acid2,788,7492,788,749615615
Total trihalomethanes (TTHMs)2,914,3342,626,332701492
Lead (total)2,500,4862,500,486646646
Trichloroacetic acid2,642,8711,605,315515193

Water Utilities in Arkansas Reporting Chemicals Exceeding Health Guidelines

Water utilities in Arkansas reporting chemicals exceeding health guidelines, according to an Environmental Working Group analysis of data obtained from state water authorities, include:

Chemicals tested
Chemicals found
Chemicals exceeding
health guidelines
SW Boone County Water Assoc3,6871512415
Pocahontas Waterworks6,7981522415
Ashdown Waterworks4,5381532215
Fountain Hill Waterworks9231532514
Calico Rock Waterworks1,7661572914
Brunner Hill Water Assoc9731532513
Little River Co Rda4,2501532313
Oden-Pencil Bluff Water Assoc3221521913
Plainview Water Department1,3121532013
Lockesburg Waterworks7781522513
Sardis Water Association12,4821532313
Cross County Rural Water Sys12,0751532313
Mountain Home Waterworks15,4581522413
Lawrence Co Reg Water Dist6,1801532112
Dardanelle Waterworks4,1901532212
Prairie Grove Waterworks4,2821522212
Fort Smith Water Utilities80,2581542412
Central Arkansas Water323,2121532212
Trumann Waterworks6,8891511812
Perryville Waterworks4,2331522012

Sources of Arkansas Drinking Water Contaminants

The contaminants identified in Arkansas drinking water come from a wide variety of sources, including agriculture, industry, water treatment plants, and polluted storm runoff from urban areas.

94Total Contaminants Detected (2004 - 2009)
20Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Arsenic (total), Cyanide, Nitrate & nitrite, Nitrate, Nitrite, Methoxychlor, Toxaphene, Paraquat, Diquat, Simazine, Metolachlor, Atrazine, Propachlor, 2,4-D, 2,4,5-T, Bromomethane, 1,2-Dibromo-3-chloropropane (DBCP), Ethylene dibromide (EDB), p-Dichlorobenzene, Ethylbenzene

38Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Nitrate, Copper, Nitrate & nitrite, Lead (total), Arsenic (total), Tetrachloroethylene, MTBE, Nitrite, Xylenes (total), Cadmium (total), Antimony (total), Mercury (total inorganic), m- & p- Xylene, Dichloromethane (methylene chloride), Cyanide, Benzene, Silver (total), p-Dichlorobenzene, Di(2-Ethylhexyl) adipate, Di-n-butylphthalate, 2,4-D, Naphthalene, p-Xylene, Phenanthrene, Pyrene, Butyl Benzylphthalate, tert-Butylbenzene, Fluoranthene, Fluorene, Indeno[1,2,3-cd]pyrene, Chrysene, Benzo[b]fluoranthene, 2,4,5-T, Benzo[g,h,i]perylene, Anthracene, Acenaphthene, Dibenz[a,h]anthracene, Paraquat

66Industrial Pollutants

Aluminum, Arsenic (total), Chlorite, Barium (total), Cadmium (total), Chromium (total), Cyanide, Lead (total), Manganese, Mercury (total inorganic), Nitrate & nitrite, Nitrate, Nitrite, Silver (total), Antimony (total), Thallium (total), p-Isopropyltoluene, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Hexachlorocyclopentadiene, Chloromethane, Chloroethane, Naphthalene, MTBE, Acenaphthene, Fluorene, Hexachlorobenzene (HCB), Phenanthrene, Anthracene, Fluoranthene, Pyrene, Di-n-butylphthalate, Butyl Benzylphthalate, Chrysene, Benzo[b]fluoranthene, Indeno[1,2,3-cd]pyrene, Dibenz[a,h]anthracene, Pentachlorophenol, cis-1,2-Dichloroethylene, Dibromomethane, 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene, tert-Butylbenzene, Bromochloromethane, Ethylene dibromide (EDB), Xylenes (total), p-Xylene, Dichloromethane (methylene chloride), p-Dichlorobenzene, Vinyl chloride, 1,2-Dichloroethane, 1,1,1-Trichloroethane, Carbon tetrachloride, Trichloroethylene, Tetrachloroethylene, Benzene, Toluene, Ethylbenzene, Styrene, m- & p- Xylene, Combined Uranium (mg/L), Radium-226, Radium-228, Potassium-40 (total), Alpha particle activity, Gross beta particle activity (pCi/L)

23Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Dichloroacetic acid, Trichloroacetic acid, Bromoform, Dibromoacetic acid, Monochloroacetic acid, Bromochloroacetic acid, Monobromoacetic acid, Chlorite, Di(2-ethylhexyl) phthalate, Cadmium (total), Chloromethane, Bromate, Vinyl chloride, Dibromomethane, Bromochloromethane, Chloroethane, Fluoranthene, Benzo[g,h,i]perylene

20Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Nitrate, Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Manganese, Radium-228, Radium-226, Alpha particle activity, Gross beta particle activity (pCi/L), Chromium (total), Combined Uranium (mg/L), Aluminum, Nitrite, Mercury (total inorganic), Chloromethane, Cyanide, Silver (total), Potassium-40 (total)

32Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Lead (total), Paraquat, p-Isopropyltoluene, Metolachlor, Propachlor, 2,4,5-T, Chloromethane, Bromomethane, Chloroethane, Naphthalene, MTBE, Acenaphthene, Fluorene, Phenanthrene, Anthracene, Fluoranthene, Pyrene, Di-n-butylphthalate, Butyl Benzylphthalate, Chrysene, Benzo[b]fluoranthene, Indeno[1,2,3-cd]pyrene, Dibenz[a,h]anthracene, Benzo[g,h,i]perylene, Dibromomethane, 1,2,4-Trimethylbenzene, 1,3,5-Trimethylbenzene, tert-Butylbenzene, Bromochloromethane, Bromochloroacetic acid, Potassium-40 (total), Uranium-238 (pCi/L)

Testing Summary for Arkansas

The federal government has set standards for some of the pollutants found in tap water supplies.

Contaminants reported as tested by water suppliers in Arkansas163
 Contaminants tested due to federal law: 85
 Contaminants tested in addition to those required by federal law: 78

Violation Summary for Arkansas

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Arkansas since 2004

Violation TypeNumber of Violations
Over maximum contaminant level, Average564
Maximum contaminant level, Monthly (Coliform bacteria)343
Failure to monitor, Routine Major (Coliform bacteria)201
Failure to report information to the public or state agency in the Consumer Confidence Report173
Monitoring and Reporting Disinfection Byproduct Rule165
Failure to monitor, Routine Minor (Coliform bacteria)149
Treatment Technique (Surface Water Treatment Rule)80
Failure to monitor or report, Routine/Repeat (Indicators of microbial or virus contamination)61
Filter Turbidity Reporting53
Inadequate reporting of information to the public50
Failure to monitor, Repeat Major (Coliform bacteria)45
Failure to Filter (Surface Water Treatment Rule)43
Over maximum contaminant level, Single Sample41
Excess Turbidity at 0.3 NTU40
Follow-up and Routine Tap Sampling37
Treatment Technique Precursor Removal36
Failure to monitor, Repeat Minor (Coliform bacteria)31
Excess Turbidity at 1 NTU22
Public Education21
Treatment Technique No Certif. Operator14
Water Quality Program Entry Point Non-Compliance13
Initial Tap Sampling for Lead and Copper7
Maximum contaminant level, Acute (Coliform bacteria)4
Failure to notify public of violation3
Optimal Corrosion Control Treatment Study Recommendation2
Initial Water Quality Parameter Monitoring and Reporting2
Optimal Corrosion Control Treatment Installation/Demonstration1