Annual Water Quality Report

For the period of January 1 to December 31, 2009

 

This report is intended to provide you with important information about your drinking water and the efforts made by the City of Ogallala water system to provide safe drinking water.
 

The source of drinking water used by the City of Ogallala is groundwater.

 

For more information regarding this report, contact:

 

JOHN SAUER

308-284-3925

 

Para Clientes Que Hablan Español:

Este informe contiene información muy importante sobre el agua que usted bebe.  Tradúzcalo ó hable con alguien que lo entienda bien.

 

Source of Drinking Water

The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pickup substances resulting from the presence of animals or from human activity.

 

Contaminants that may be present in source water include:

 

Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations and wildlife.

 

Inorganic contaminants, such as salts and metals, which can be naturally occurring or result from urban storm water runoff, industrial, or domestic wastewater discharges, oil and gas production, mining, or farming. 

 

Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm water runoff, and residential uses.

 

Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban storm water runoff, and septic systems.

 

Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.

 

 

Drinking water, including  bottled water, may reasonably be expected to contain at least small amounts of some contaminants.  The presence of contaminants does not necessarily indicate that water poses a health risk.  More information about contaminants and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline (800-426-4791).

 

In order to ensure that water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems.  FDA regulations establish limits for contaminants in bottled water which must provide the same protection for public health.

 

Some people may be more vulnerable to contaminants in drinking water than the general population.

 

Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers.  EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791).

 

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children.  Lead in drinking water is primarily from materials and components associated with service lines and home plumbing.  We cannot control the variety of materials used in plumbing components.  When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking.  If you are concerned about lead in your water, you may wish to have your water tested.  Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.

 

The City of Ogallala is required to test for the following contaminants:

Coliform Bacteria, Antimony, Arsenic, Asbestos, Barium, Beryllium, Cadmium, Chromium, Copper, Cyanide, Fluoride, Lead, Mercury, Nickel, Nitrate, Nitrite, Selenium, Sodium, Thallium, Alachlor, Atrazine, Benzo(a)pyrene, Carbofuran, Chlordane, Dalapon, Di(2-ethylhexyl)adipate, Dibromochloropropane, Dinoseb, Di(2-ethylhexyl)phthalate, Diquat, 2,4-D, Endothall, Endrin, Ethylene dibromide, Glyphosate, Heptachlor, Heptachlor epoxide, Hexachlorobenzene, Hexachlorocyclopentadiene, Lindane, Methoxychlor, Oxamyl (Vydate), Pentachlorophenol, Picloram, Polychlorinated biphenyls, Simazine, Toxaphene, Dioxin, Silvex, Benzene, Carbon Tetrachloride, o-Dichlorobenzene, Para-Dichlorobenzene, 1,2-Dichlorethane, 1,1-Dichloroethylene, Cis-1,2,-Dichloroethylene, Trans-1,2-Dichloroethylene, Dichloromethane, 1,2-Dichloropropane, Ethylbenzene, Monochlorobenzene, 1,2,4-Trichlorobenzene, 1,1,1-Trichloroethane, 1,1,2-Trichloroethane, Trichloroethylene, Vinyl Chloride, Styrene, Tetrachloroethylene, Toluene, Xylenes (total), Gross Alpha (minus Uranium & Radium 226), Radium 226 plus Radium 228, Sulfate, Chloroform, Bromodichloromethane, Chlorodibromomethane, Bromoform, Chlorobenzene, m-Dichlorobenzene, 1,1-Dichloropropene, 1,1-Dichloroethane, 1,1,2,2-Tetrachlorethane, 1,2-Dichloropropane, Chloromethane, Bromomethane, 1,2,3-Trichloropropane, 1,1,1,2-Tetrachloroethane, Chloroethane, 2,2-Dichloropropane, o-Chlorotoluene, p-Chlorotoluene, Bromobenzene, 1,3-Dichloropropene, Aldrin, Butachlor, Carbarryl, Dicamba, Dieldrin, 3-Hydroxycarbofuran, Methonyl, Metolachlor, Metribuzin, Propachlor.

                                                                                       wastewater discharges, oil and gas production, mining, or farm


 

 

City of Ogallala                                                                 TEST RESULTS (COLLECTED IN 2009 UNLESS NOTED)                        Date Printed:    3/5/2010      NE 3110102

 

Coliform Bacteria

Maximum Contaminant Level Goal

Total Coliform Maximum Contaminant Level

Highest No. Of Positive Total Coliform Samples in any month

Fecal Coliform or E.Coli Maximum Contaminant Level

Total No. of Positive E.Coli or Fecal Coliform Samples

Violation?

Likely Source of Contamination

0

1 positive monthly sample

8

 

0

Yes

Naturally present in the environment

 

Lead and Copper    

Definitions:

Action Level Goal (ALG): The level of a contaminant in drinking water below which there is no known or expected risk to health.  ALGs allow for a margin of safety.

Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.

Lead and Copper

Date Sampled

MCLG

Action Level (AL)

90th Percentile

# Sites Over AL

Units

Violation

Likely Source of Contamination

Copper

06/18/2007

1.3

1.3

0.1804

 

ppm

N

Erosion of natural deposits; Leaching from wood preservatives; Corrosion of household plumbing systems.

Lead

6/18/2007

0

15

0.2

 

ppb

N

Corrosion of household plumbing systems; Erosion of natural deposits.

 

Water Quality Test Results

Maximum Contaminant Level Goal or MCLG:  The level of a contaminant in drinking water below which there is no known or expected risk to health.  MCLGs allow for a margin of safety.

Maximum Contaminant Level or MCL:  The highest level of a contaminant that is allowed in drinking water.  MCLs are set as close to the MCLGs as feasible using the best available treatment technology.

Maximum residual disinfectant level goal or MRDLG: The level of a drinking water disinfectant below which there is no known or expected risk to health.  MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

Maximum residual disinfectant level or MRDL:  The highest level of a disinfectant allowed in drinking water.  There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

Definitions:  The following tables contain scientific terms and measures, some of which may require explanation.

ppb:  micrograms per liter or parts per billion – or one ounce in 7,350,000 gallons of water.

Na:  not applicable

Avg:  Regulatory compliance with some MCLs are based on running annual average of monthly samples.

ppm:  milligrams per liter or parts per million – or one ounce in 7,350 gallons of water.

pCi/l:  PicoCuries per liter (measurement of radioactivity)

Regulated Contaminants

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Unit of Measurement

Violation?

Likely Source Of Contaminant

Inorganic Contaminants

*Arsenic                                          

1/22/2007

6.88

0 – 6.88

0

10

ppb

No

Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes

Barium                                          

0.107

0.0885 – 0.107

2

2

ppm

No

Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits

Chromium                                     

3.54

3.49 – 3.54

100

100

ppb

No

Discharge from steel and pulp mills; Erosion of natural deposits

Fluoride                                         

1.11

0.589 – 1.11

4

4.0

ppm

No

Erosion of natural deposits; Water additive which promotes strong teeth; Discharge from fertilizer and aluminum factories

Nitrite (measured as nitrogen)

2.83

2.44 – 2.83

10

10

ppm

No

Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits

 

 

 

 

 

 

 

 

Radioactive Contaminants

Gross alpha excluding radon and uranium                              

 

10.5

9 – 10.5

0

15

pCi/L

No

Erosion of natural deposits

Uranium                      

10/26/2004

29.353

29.353 – 29.353

0

30

ug/l

No

Erosion of natural deposits

                 

 

*While your drinking water meets EPA’s standard for arsenic, it does contain low levels of arsenic.  EPA’s standard balances the current understanding of arsenic’s possible health effects against the costs of removing arsenic from drinking water.  EPA continues to research the health effects of low levels of arsenic, which is a mineral known to cause cancer in humans at high concentrations and is linked to other health effects such as skin damage and circulatory problems.

 

Violations Table

 

Total Coliform

Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentially-harmful, bacteria may be present.

Violation Type

Violation Begin

Violation End

Violation Explanation

MCL (TCR), MONTHLY

08/01/2009

08/31/2009

Total coliform bacteria were found in our drinking water during the period indicated in enough samples to violate a standard.  System was chlorinated to bring back into compliance.

MCL (TCR), MONTHLY

12/01/2009

12/31/2009

Total coliform bacteria were found in our drinking water during the period indicated in enough samples to violate a standard.  System was chlorinated to bring back into compliance.

 

This report will not be mailed, copies are available at the City Clerks Office, 411 East 2nd Street.