The Power of Information

National Drinking Water Database


Hamilton - Kingston, MO


Serves 1,750 people - Test data available: 2004-2009

This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the Missouri Department of Natural Resources- Public Drinking Water Program. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results. 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 to protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes test results for this utility and lists potential health concerns.

 
This Drinking Water System
National Average
Exceed Health GuidelinesTests showing chemicals at concentrations above health guidelines established by federal and state health agencies. These guidelines are typically set at a levels that pose no significant health risk.
14 chemicals
4
Health Standard ExceedencesChemicals detected at concentrations above the legal limit, the Maximum Contaminant Level (MCLs) established by the U.S. EPA. 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.
4 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
28 chemicals
8
Tests ConductedThe total number of number of water quality tests conducted by water utilities and recorded in data provided by the state water agency.
2,504 tests
420

Contaminants Exceeding Health Guidelines

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Total trihalomethanes (TTHMs)Total trihalomethanes constitute the sum of four disinfection byproducts: chloroform, bromodichloromethane, dibromochloromethane, and bromoform.46.71 ppb
174.25 ppb
Yes
9.8 ppb
Yes
80 ppb
ChloroformChloroform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.37.49 ppb
150.08 ppb
Yes
5.7 ppb
Yes
80 ppb
AluminumAluminum is a metal released from metal refineries and mining operations.474.91 ppb
1180 ppb
Yes
200 ppb
Yes
200 ppb
Total haloacetic acids (HAAs)Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.29.04 ppb
77.75 ppb
Yes
0.7 ppb
Yes
60 ppb
BromodichloromethaneBromodichloromethane is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.7.21 ppb
17.9 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
80 ppb
Dichloroacetic acidDichloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.15.68 ppb
41.3 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
60 ppb
DibromochloromethaneDibromochloromethane is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.1.81 ppb
7.43 ppb
Yes
0.4 ppb
No
80 ppb
AtrazineAtrazine is an endocrine-disrupting herbicide used on corn, sugarcane and sorghum; it is associated with adverse reproductive effects and toxicity to the immune system.0.22 ppb
1.31 ppb
Yes
0.15 ppb
No
3 ppb
ChloriteChlorite is a disinfection byproduct resulting from water treatment with chlorine dioxide, or from the use of chlorine dioxide as a bleaching agent for cellulose, paper pulp, flour and oils.545.18 ppb
910 ppb
Yes
800 ppb
No
1000 ppb
Trichloroacetic acidTrichloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.9.45 ppb
32.08 ppb
Yes
20 ppb
No
60 ppb
BromoformBromoform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.05 ppb
0.56 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
80 ppb
Arsenic (total)Arsenic contaminates drinking water due to mining runoff, erosion of natural deposits, emissions from glass and electronics processing and the use of arsenical compounds as wood preservatives and pesticides.0.34 ppb
1.06 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
10 ppb
Lead (total)Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits.0.1 ppb
0.83 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
Vinyl chlorideVinyl chloride is a chemical used for production of PVC plastic; it contaminates drinking water due to leaching from PVC pipes and discharges from plastics manufacturing.<0.01 ppb
<0.01 ppb
Yes
MCLGA non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.: 0 ppb
No
2 ppb
NOTE: Each dot in the above graph represents one month.
* 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.

Other Detected Contaminants

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Bromochloroacetic acidBromochloroacetic acid is a disinfection byproduct, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.2.58 ppb
9.32 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Bromodichloroacetic acidBromodichloroacetic acid is a disinfection byproduct that forms when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.1.55 ppb
4.83 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Monochloroacetic acidMonochloroacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.2.99 ppb
13.75 ppb
No
70 ppb
No
60 ppb
Monobromoacetic acidMonobromoacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.76 ppb
11.28 ppb
NoNo
60 ppb
Dibromoacetic acidDibromoacetic acid is a disinfection byproduct regulated by EPA as one of five haloacetic acids that are formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.16 ppb
1.46 ppb
NoNo
60 ppb
Barium (total)Barium is a mineral that enters drinking water through drilling and mining waste runoff, discharges from chemical industries and erosion of natural deposits.26.3 ppb
53.9 ppb
No
700 ppb
No
2000 ppb
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.1.08 ppb
1.81 ppb
No
50 ppb
No
50 ppb
CopperCopper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits.6.14 ppb
24.56 ppb
No
300 ppb
No
1000 ppb
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.0.02 ppm
0.07 ppm
No
10 ppm
No
10 ppm
Chlorodibromoacetic acidChlorodibromoacetic acid is a disinfection byproduct that forms when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water.0.06 ppb
1.41 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Tribromoacetic acidTribromoacetic acid is a haloacetic acid and an unregulated byproduct of tap water disinfection using ozonation.0.12 ppb
2.93 ppb
NoLegal at any levelThis is the Federal Limit. State Limits may be lower.
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.0.22 ppb
1.29 ppb
No
100 ppb
No
100 ppb
Oxamyl (Vydate)Oxamyl is a neurotoxic insecticide used on cotton, fruit and vegetable crops (apples, potatoes and tomatoes).1.15 ppb
4.6 ppb
No
10 ppb
No
200 ppb
MethomylMethomyl is a neurotoxic insecticide used on field, fruit and vegetable crops; EPA classifies methomyl as "Restricted Use Pesticide" because of its high acute oral toxicity to humans.0.28 ppb
1.13 ppb
No
200 ppb
Legal at any levelThis is the Federal Limit. State Limits may be lower.
NOTE: Each dot in the above graph represents one month.
* 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.

Contaminants Not Detected - 192 chemicals

1,1,1,2-Tetrachloroethane, 1,1,1-Trichloroethane, 1,1,2,2-Tetrachloroethane, 1,1,2-Trichloroethane, 1,1-Dichloroethane, 1,1-Dichloroethylene, 1,1-Dichloropropene, 1,2 Dibromo-3-chloropropane (DBCP), 1,2,3-Trichlorobenzene, 1,2,3-Trichloropropane, 1,2,4-Trichlorobenzene, 1,2,4-Trimethylbenzene, 1,2-Dichloroethane, 1,2-Dichloropropane, 1,3,5-Trimethylbenzene, 1,3-Dichloropropane, 2,2,3,3,4,4,6-heptachlorobiphenyl, 2,2,3,4,6-pentachlorobiphenyl, 2,2,4,4,5,6-hexachlorobiphenyl, 2,2,4,4-tetrachlorobiphenyl, 2,2-Dichloropropane, 2,3,3,4,5,6,6-octachlorobiphenyl, 2,3-Dichlorobiphenyl, 2,4,5-TP (Silvex), 2,4,5-Trichlorobiphenyl, 2,4-d, 2,4-Dinitrotoluene, 2,6-Dinitrotoluene, 2-Chlorobiphenyl, 3-Hydroxycarbofuran, Acenaphthylene, Acetochlor, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Alpha Chlordane, Alpha particle activity, alpha-Lindane, Ametryn, Anthracene, Antimony (total), Aroclor 1016, Aroclor 1221, Aroclor 1232, Aroclor 1242, Aroclor 1248, Aroclor 1254, Aroclor 1260, Atraton, Benzene, Benzo[a]anthracene, Benzo[a]pyrene, Benzo[b]fluoranthene, Benzo[g,h,i]perylene, Benzo[k]fluoranthene, Beryllium (total), beta-Lindane, Bromacil, Bromobenzene, Bromochloromethane, Bromomethane, Butachlor, Butyl Benzylphthalate, Butylate (Sutan), Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Carboxin, Chlordane, Chlorneb, Chlorobenzilate, Chloroethane, Chloromethane, Chlorothalonil (Bravo), Chlorpropham, Chlorpyriphos, Chrysene, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Cyanazine (Bladex), Cycloate, Dacthal, Dalapon, delta-BHC, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Di-n-butylphthalate, Diazinon (Spectracide), Dibenz[a,h]anthracene, Dibromomethane, Dicamba, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Dichlorvos, Dieldrin, Diethylphthalate, Dimethylphthalate, Dinoseb, Diphenamid, Disulfoton, Endosulfan I, Endosulfan II, Endosulfan Sulfate, Endrin, Endrin Aldehyde, EPTC (Eptam), Ethoprop, Ethylbenzene, Ethylene dibromide (EDB), Etridiazole, Fenamiphos, Fenarimol, Fluorene, Fluridon, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Hexazinone, Indeno[1,2,3-cd]pyrene, Isophorone, Isopropylbenzene, Lindane, m- & p- Xylene, m-Dichlorobenzene, Mercury (total inorganic), Merphos, Methoxychlor, Methyl Paraoxon, Metolachlor, Metribuzin, Mevinphos, Mgk-264, Molinate (Ordram), Monochlorobenzene (Chlorobenzene), Mtbe, n-Butylbenzene, n-Propylbenzene, Naphthalene, Napropamide, Nitrate, Norflurazon, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, para-para DDD, para-para DDE, Pebulate, Pentachlorophenol, Permethrin (Mixed,cis,trans), Phenanthrene, Picloram, Prometon, Prometryn, Pronamide, Propachlor, Propazine, Pyrene, Radium-228, sec-Butylbenzene, Selenium (total), Silver (total), Simazine, Simetryn, Stirofos, Styrene, Tebuthiuron, Terbacil, Terbufos, Terbutryn, tert-Butylbenzene, Tetrachloroethylene, Thallium (total), Toluene, Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trans-Nonachlor, Triademefon, Trichloroethylene, Trichlorofluoromethane, Tricyclazole, Trifluralin, Vernolate, Xylenes (total)

Pollution Summary

28Total Contaminants Detected (2004 - 2009)

Barium (total), Chromium (total), Copper, Manganese, Nitrate & nitrite, Methomyl, Oxamyl (Vydate), Monochloroacetic acid, Monobromoacetic acid, Dibromoacetic acid, Bromochloroacetic acid, Bromodichloroacetic acid, Chlorodibromoacetic acid, Tribromoacetic acid, Aluminum, Arsenic (total), Chlorite, Lead (total), Atrazine, Dichloroacetic acid, Trichloroacetic acid, Total haloacetic acids (HAAs), Chloroform, Bromoform, Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs), Vinyl chloride

5Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Nitrate & nitrite, Methomyl, Oxamyl (Vydate), Arsenic (total), Atrazine

4Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Copper, Nitrate & nitrite, Lead (total), Arsenic (total)

9Industrial Pollutants

Barium (total), Chromium (total), Manganese, Nitrate & nitrite, Aluminum, Arsenic (total), Chlorite, Lead (total), Vinyl chloride

17Water 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, Bromodichloroacetic acid, Vinyl chloride, Chlorodibromoacetic acid, Tribromoacetic acid

8Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Manganese, Chromium (total), Aluminum

6Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Methomyl, Bromochloroacetic acid, Bromodichloroacetic acid, Chlorodibromoacetic acid, Tribromoacetic acid, Lead (total)

EPA Violation Summary

Violation CategoryNumber of Violations
MCL and Treatment
(click see violations)
5

Information on violations is drawn directly from EPA's national violations database in the Agency's Safe Drinking Water Information System. Analyses by others have raised questions about the quality of the information in EPA's database. For the purposes of this investigation, EWG is not showing below or including in our analyses, those violations for individual water suppliers that occurred on days for which the total number of violations assigned by EPA to that water supplier was greater than 20. This criteria was based on common characteristics of incorrect violations data as identified by water utilities, from a review of EPA's violations data by several hundred utilities prior to the release of EWG's investigation.