Untitled 1

Annual Drinking Water Quality Report

MACKINAW

IL1790350

Annual Water Quality Report for the period of January 1 to December 31, 2006

This report is intended to provide you with important information about your drinking water and the efforts made by the MACKINAW water system to provide safe drinking water. The source of drinking water used by MACKINAW is Ground Water.

For more information regarding this report contact:

Name: Randy Dabney

Phone: 309-359-5821

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 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 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 at (800) 426-4791.

In order to ensure 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.

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).

Source Water Assessment

A Source Water Assessment summary is included below for your convenience.

To determine Mackinaw's susceptibility to groundwater contamination, the following documents were reviewed: a Well Site Survey, published in 1988 by the Illinois EPA; and a Wellhead Protection Program Plan, published in 1997 by Farnsworth and Wylie P.C. for the Village of Mackinaw. During the survey of Mackinaw's source water protection area, Illinois EPA staff recorded four potential sources, routes, or possible problem sites within the 400 foot minimum setback zone of wells #3, #4, and #5. A total of five potential sources or problem sites are located within the 1,000 foot survey radius of these wells. However, the Illinois EPA has determined that several of these potential sources of contamination may now be of reduced risk to the source water utilized by the community water supply wells because these wells are now inactive. Four potential sources or problem sites are located within the 1,000 foot survey radius of wells #6 and #7. Based upon this information, the Illinois EPA has determined that Mackinaw Wells #6 and #7 are not susceptible to IOC, VOC and SOC contamination. This fact is based upon the construction of the wells which affords it natural geologic protection. The Illinois Environmental Protection Act provides minimum protection zones of 200 feet for wells #6 and #7. These minimum protection zones are regulated by the Illinois EPA. In addition, the village should enact "maximum setback zones" which are authorized by the Illinois Environmental Protection Act. These zoning ordinances allows county and municipal officials the opportunity to provide additional potential source of groundwater contamination prohibitions up to 1,000 feet from their wells. To further minimize the risk to the village's groundwater supply, the Illinois EPA recommends that the following additional activities be considered. First, the water supply staff may wish to revisit their contingency planning documents. Contingency planning documents are a primary means to ensure that, through emergency preparedness, a community will minimize their risk of being without safe and adequate water. Second, the water supply staff is encouraged to review their cross connection control program to ensure that it includes the proper elements and is kept current and viable. Cross connections to either the water treatment plant (for example, at bulk water loading stations) or in the distribution system may negate all source water protection initiatives provided by the community. Third, wells #3, #4, and #5 are inactive. The community should abandon the inactive wells. Inactive wells that are not properly abandoned can act as direct conduits for surficial contaminants into the aquifer and are considered “routes” under the Environmental Protection Act.

2006 Regulated Contaminants Detected

Lead and Copper

Date Sampled: 12/31/2006

Definitions:

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

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

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	15 ppb	11 ppb	1	1.3 ppm	1.3 ppm	0.55 ppm	2	Corrosion of household plumbing systems; Erosion of natural deposits	Edit

Water Quality Test Results

Definitions: The following tables contain scientific terms and measures, some of which may require explanation.Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. MCL's are set as close to the Maxium Contaminant Level Goal as feasible using the best available treatment technology.Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLG's allow for a margin of safety.mg/l: milligrams per litre or parts per million - or one ounce in 7,350 gallons of water.ug/l: micrograms per litre 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.Maximum Residual Disinfectant Level (MRDL): The highest level of disinfectant allowed in drinking water.Maximum Residual Disinfectant Level Goal (MRDLG): The level of disinfectant in drinking water below which there is no known or expected risk to health. MRDLG's allow for a margin of safety.

Regulated Contaminants

Disinfectants & Disinfection By-Products	Collection Date	Highest Level Detected	Range of Levels Detected	MCLG	MCL	Units	Violation	Likely Source Of Contaminant
TTHMs [Total Trihalomethanes]	6/20/2006	15.2	Not Applicable	N/A	80	ppb	No	By-product of drinking water chlorination	Edit
Total Haloacetic Acids (HAA5)	6/20/2006	17.7	Not Applicable	N/A	60	ppb	No	By-product of drinking water chlorination	Edit
Chlorine	12/31/2006	0.3684	0.2172 - 0.3684	MRDLG=4	MRDL=4	ppm		Water additive used to control microbes	Edit

Inorganic Contaminants	Collection Date	Highest Level Detected	Range of Levels Detected	MCLG	MCL	Units	Violation	Likely Source Of Contaminant
Barium	4/25/2005	0.012	Not Applicable	2	2	ppm	No	Discharge of drilling wastes; Discharge from metal refineries; Erosion of natural deposits	Edit
Chromium	4/25/2005	6	Not Applicable	100	100	ppb	No	Discharge from steel and pulp mills; Erosion of natural deposits	Edit
Fluoride	4/25/2005	0.97	Not Applicable	4	4	ppm	No	Erosion of natural deposits; Water additive which promotes strong teeth; Fertilizer discharge	Edit
Nitrate-Nitrite	4/25/2005	0.073	Not Applicable	10	10	ppm	No	Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits	Edit
Nitrate (As N)	5/23/2006	0.13	Not Applicable	10	10	ppm	No	Runoff from fertilizer use; Leaching from septic tanks, sewage; Erosion of natural deposits	Edit
Selenium	4/25/2005	1	Not Applicable	50	50	ppb	No	Discharge from petroleum and metal refineries; Erosion of natural deposits	Edit

Radioactive Contaminants	Collection Date	Highest Level Detected	Range of Levels Detected	MCLG	MCL	Units	Violation	Likely Source Of Contaminant
Combined Radium	4/18/2006	0.66	0 - 0.66	0	5	pCi/L	No	Erosion of natural deposits	Edit

State Regulated Contaminants	Collection Date	Highest Level Detected	Range of Levels Detected	MCLG	MCL	Units	Violation	Likely Source Of Contaminant
Manganese This contaminant is not currently regulated by USEPA. However, the state has set an MCL for this contaminant for supplies serving a population of 1000 or more.	4/25/2005	2	Not Applicable	N/A	150	ppb	No	Erosion of naturally occurring deposits	Edit
Sodium There is not a state or federal MCL for sodium. Monitoring is required to provide information to consumers and health officials that are concerned about sodium intake due to dietary precautions. If you are on a sodium-restricted diet, you should consult a physician about this level of sodium in the water.	4/25/2005	56	Not Applicable	N/A	N/A	ppm	No	Erosion of naturally occuring deposits; used in water softener regeneration	Edit
Zinc	4/25/2005	13	Not Applicable	N/A	5000	ppb	No	Naturally occuring; discharge from metal factories	Edit

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.

This edition of the 2007 Consumer Confidence Report will not be mailed. Copies are available upon request at the Village of Mackinaw Municipal Building.