The Power of Information

National Drinking Water Database


City of Central City - Silver Creek, NE


Serves 3,001 people - Test data available: 2004-2008

This drinking water quality report shows results of tests conducted by the water utility and provided to the Environmental Working Group (EWG) by the Nebraska Department of Health and Human Services. 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.
6 chemicals
0.5
Pollutants FoundThe total number of contaminants detected since 2004, according to data provided by the state water agency.
18 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.
6,099 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*
Nitrate & nitriteNitrate and nitrite enter water from fertilizer runoff, leaching from septic tanks, and erosion of natural deposits.3.76 ppm
18 ppm
Yes
10 ppm
Yes
10 ppm
ManganeseManganese is a naturally occurring element released from mineral deposits as well as industrial use.221.83 ppb
305 ppb
Yes
50 ppb
Yes
50 ppb
TetrachloroethyleneTetrachloroethylene (perc) is a common soil and groundwater contaminant used in dry cleaning and as a solvent in automotive and metalworking factories and other industries.0.41 ppb
5.1 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
Yes
5 ppb
Combined Uranium (pCi/L)Uranium is a radioactive element commonly found in most rocks; processed ore is used for power generation and weapons manufacture.12.53 pCi/L
24.4 pCi/L
YesYes
15 pCi/L
Combined Uranium (mg/L)Uranium is a radioactive element commonly found in most rocks; processed uranium ore is used for power generation and weapons manufacture.14.29 ppb
57.1 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
Yes
30 ppb
Alpha particle activity (incl. radon & uranium)Alpha particles are a form of radiation associated with mining waste pollutants and natural sources.9.11 pCi/L
18.95 pCi/L
YesYes
15 pCi/L
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.5.83 ppb
8.31 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
Alpha particle activity (excl radon and uranium)Alpha particles are a form of radiation associated with radioactive mining waste pollutants and natural sources.6.1 pCi/L
10.05 pCi/L
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 pCi/L
No
15 pCi/L
RadonRadon is a radioactive breakdown product of radium and uranium in soil, rock and water; it is often present in groundwater.366 pCi/L
483 pCi/L
Yes
1.5 pCi/L
Legal at any levelThis is the Federal Limit. State Limits may be lower.
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.0.05 ppb
0.24 ppb
Yes
0.15 ppb
No
3 ppb
Di(2-ethylhexyl) phthalateDi(2-ethylhexyl) phthalate is a pollutant from rubber and industrial chemical factories and a leachate from PVC pipes; it is classified by EPA as a probable human carcinogen.0.31 ppb
2.59 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
6 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.0.07 ppb
0.32 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
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.108.5 ppb
343.53 ppb
Yes
300 ppb
No
1000 ppb
Radium-226Radium-226 is a radioactive element usually found around uranium deposits.0.18 pCi/L
1.1 pCi/L
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 pCi/L
No
5 pCi/L
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*
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.155.56 ppb
207 ppb
No
700 ppb
No
2000 ppb
Chromium (total)Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits.3.67 ppb
10.1 ppb
No
100 ppb
No
100 ppb
Selenium (total)Selenium is a naturally occurring element that contaminates water due to mining or petrolum refining, fly-ash from coal-burning power plants, and irrigation of arid farmland soils high in selenium.5.12 ppb
14.65 ppb
No
50 ppb
No
50 ppb
MTBEMTBE (methyl tert-butyl ether) is a fuel additive that had been used as an octane enhancer in unleaded gasoline; it contaminates groundwater due to spillage or leakage at gas stations, and has been banned or scheduled for phaseout in most states.0.04 ppb
0.69 ppb
No
13 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 - 121 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-Dichloropropane, 2,3,7,8-TCDD (Dioxin), 2,4,5-TP (Silvex), 2,4-d, 3-Hydroxycarbofuran, Alachlor (Lasso), Aldicarb, Aldicarb sulfone, Aldicarb sulfoxide, Aldrin, Antimony (total), Aroclor 1016, Aroclor 1221, Aroclor 1232, Aroclor 1242, Aroclor 1248, Aroclor 1254, Aroclor 1260, Asbestos, Benzene, Benzo[a]pyrene, Beryllium (total), Bromobenzene, Bromochloromethane, Bromodichloromethane, Bromoform, Bromomethane, Butachlor, Butylate (Sutan), Cadmium (total), Carbaryl, Carbofuran, Carbon tetrachloride, Chlordane, Chloroethane, Chloroform, Chloromethane, Chlorpyriphos, cis-1,2-Dichloroethylene, cis-1,3-Dichloropropene, Cyanazine (Bladex), Cyanide, Dalapon, Di(2-Ethylhexyl) adipate, Dibromochloromethane, Dibromomethane, Dicamba, Dichlorodifluoromethane, Dichloromethane (methylene chloride), Dieldrin, Dinoseb, Diquat, Endothall, Endrin, Ethylbenzene, Ethylene dibromide (EDB), Fonofos (dyfonate), Glyphosate, Heptachlor, Heptachlor epoxide, Hexachlorobenzene (HCB), Hexachlorobutadiene, Hexachlorocyclopentadiene, Isopropylbenzene, Lindane, m- & p- Xylene, m-Dichlorobenzene, m-Xylene, Mercury (total inorganic), Methomyl, Methoxychlor, Metolachlor, Metribuzin, Monochlorobenzene (Chlorobenzene), n-Butylbenzene, n-Propylbenzene, Naphthalene, Nitrite, o-Chlorotoluene, o-Dichlorobenzene, o-Xylene, Oxamyl (Vydate), p-Chlorotoluene, p-Dichlorobenzene, p-Isopropyltoluene, Paraquat, Pentachlorophenol, Picloram, Propachlor, Radium-228, sec-Butylbenzene, Silver (total), Simazine, Styrene, tert-Butylbenzene, Thallium (total), Toluene, Total trihalomethanes (TTHMs), Toxaphene, trans-1,2-Dichloroethylene, trans-1,3-Dichloropropene, Trichloroethylene, Trichlorofluoromethane, Trifluralin, Vinyl chloride

Pollution Summary

18Total Contaminants Detected (2004 - 2008)

Arsenic (total), Barium (total), Chromium (total), Copper, Lead (total), Manganese, Nitrate & nitrite, Selenium (total), Di(2-ethylhexyl) phthalate, Atrazine, MTBE, Tetrachloroethylene, Alpha particle activity (excl radon and uranium), Alpha particle activity (incl. radon & uranium), Radon, Combined Uranium (mg/L), Radium-226, Combined Uranium (pCi/L)

4Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Arsenic (total), Nitrate & nitrite, Selenium (total), Atrazine

6Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

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

15Industrial Pollutants

Arsenic (total), Barium (total), Chromium (total), Lead (total), Manganese, Nitrate & nitrite, Selenium (total), Di(2-ethylhexyl) phthalate, MTBE, Tetrachloroethylene, Alpha particle activity (excl radon and uranium), Alpha particle activity (incl. radon & uranium), Combined Uranium (mg/L), Radium-226, Combined Uranium (pCi/L)

1Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Di(2-ethylhexyl) phthalate

14Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Manganese, Radium-226, Alpha particle activity (excl radon and uranium), Combined Uranium (pCi/L), Chromium (total), Alpha particle activity (incl. radon & uranium), Combined Uranium (mg/L), Selenium (total), Radon

3Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Lead (total), MTBE, Radon

EPA Violation Summary

Violation CategoryNumber of Violations
MCL and Treatment
(click see violations)
1

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.