City of Ogallala
Annual Water Quality Report
For the period of January 1 to December 31, 2007
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.
For more information regarding this report, contact:
CHRIS BATT
308-284-3925
If you would like to observe the decision-making processes that affect drinking water quality, please attend the regularly scheduled meeting of the City Council. If you would like to participate in the process, please contact the City Clerk to arrange to be placed on the agenda of the meeting of the City Council.
Este informe contiene información muy importante sobre el agua que usted bebe. Tradúzcalo ó hable con alguien que lo entienda bien.
CROSS-CONNECTION QUESTION AND ANSWER:
Q: What is a cross connection?
A: A cross connection is a direct arrangement of a piping line which allows the potable water supply to be connected to a line which contains a contaminant. An example is the common garden hose attached to a sill cock with the end of the hose lying in a cesspoll. Other examples are a garden hose attached to a service sink with the end of the hose submerged in a tub full of detergent, supply lines connected to bottom-fed tanks, supply lines to boilers.
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and groundwater 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 pick up substances resulting from the presence of animals or from human activity.
The source of drinking water used by the City of Ogallala is groundwater. This water is pumped from wells maintained by the City of Ogallala.
The Nebraska Department of Environmental Quality (NDEQ) has completed the Source Water Assessment. Included in the assessment is a Wellhead Protection Area map, potential contaminant source inventory, vulnerability rating, and source water protection information. To view the Source Water Assessment or for more information please contact the person named on the cover of this report or NDEQ at (402) 471-6988.
In order to insure that tap 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.
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.
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).
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, Uranium – If disinfecting test for DBP’s.
wastewater discharges, oil and gas production, mining, or farm
City of Ogallala TEST RESULTS (COLLECTED IN 2007 UNLESS NOTED) Date Printed: 3/4/2008 NE 3110102
Lead and Copper Date Sampled: 6/12/2007
|
Lead MCLG |
Lead Action Level (AL) |
Lead 90th Percentile |
# Sites Over Lead AL |
Copper MCLG |
Copper Action Level (AL) |
Copper 90th Percentile |
# Sites Over Copper AL |
Likely Source of Contamination |
|
0 ppb |
15 ppb |
0.2 ppb |
|
1.3 ppm |
1.3 ppm |
0.1804 ppm |
|
Erosion of natural deposits; Leaching from wood preservatives; Corrosion of household plumbing systems. |
Regulated Contaminants |
Highest Level Detected |
Range of Levels Detected |
Unit of Measurement |
MCLG |
MCL |
Violation? |
Likely Source Of Contaminant |
|||
|
Inorganic Contaminants |
||||||||||
Arsenic |
6.88 |
5.62-6.88 |
ppb |
0 |
10 |
No |
Erosion of natural deposits; Runoff from orchards; Runoff from electronics production wastes |
|||
|
Barium 10/2/2006 |
0.108 |
0.0895-0.108 |
ppm |
2 |
2 |
No |
Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits |
|||
|
Chromium 10/2/2006 |
1.26 |
1.13-1.26 |
ppb |
100 |
100 |
No |
Discharge from steel and pulp mills; Erosion of natural deposits |
|||
|
Fluoride 10/2/2006 |
0.64 |
0.61-0.64 |
ppm |
4 |
4 |
No |
Erosion of natural deposits; Water additive which promotes strong teeth; Fertilizer discharge |
|||
|
Nickel 12/8/2003 |
4.67 |
1.02-4.67 |
ppb |
n/a |
100 |
No |
Erosion of natural deposits; Leaching |
|||
|
Nitrate-Nitrite |
8.9 |
2.3-8.9 |
ppm |
10 |
10 |
No |
Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits |
|||
|
Radioactive Contaminants |
||||||||||
|
Alpha Emitters 1/9/2006 |
6.7 |
3.6-6.7 |
pCi/l |
0 |
15 |
No |
Erosion of natural deposits |
|||
|
Combined Radium (Radium 226 and 2) |
0 |
Not Applicable |
pCi/l |
0 |
5 |
No |
Erosion of natural deposits |
|||
|
Uranium Mass 8/17/2004 |
30.1 |
23.38805-30.1 |
ug/L |
0 |
30 |
No |
Erosion of natural deposits |
|||
|
Unregulated Contaminants |
|
|
|
|||||||
|
Contaminant |
Highest Level Detected |
Range of Levels Detected |
Unit of Measurement
|
|
|
|
||||
|
Radium-226 12/17/2003 |
0.3 |
Not Applicable |
pCi/l |
|
|
|
||||
|
Radon 12/17/2003 |
238 |
215 – 238 |
pCi/l |
|
|
|
||||
|
Sulfate 12/08/2003 |
374 |
21.4 -374 |
ppm |
|
|
|
||||
Note: The state requires monitoring of certain contaminants less than once per year because the concentrations of these contaminants do not change frequently. Therefore, some of this data may be more than one year old.
MCL (Maximum Contaminant Level): 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. MCLG (Maximum Contaminant Level Goal): 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. AL (Action Level): The concentration of a contaminant which, if exceeded triggers treatment or other requirements which a water system must follow.
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.