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WATER QUALITY REPORT

 

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Annual Drinking Water Quality Report for Calendar Year 2010

Village of Divernon  - IL1670450

Annual Water Quality Report for the period of January 1 to December 31, 2010.  This report is intended to provide you with important information about your drinking water and the efforts made by the water system to provide safe drinking water. The source of drinking water used by Divernon is purchased Surface Water.  For more information regarding this report contact:

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

Contact Name:

       Larry Rhodes                                            .

Telephone Number:

       (217) 628-3416                                         .

E-mail (if available)

       divernonpw@comcast.net                         .

We want our valued customers to be informed about their water quality.  If you would like to learn more, please feel welcome to attend any of our regularly scheduled meetings on the 2nd and 4th Wednesday of the month at 7:00 pm.  These meetings are held at the Divernon Village Hall at 50 E Brown Street in Divernon.

Sources 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:

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 EPAs 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).

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 components.  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 water 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.

Source Water Name                                                Type of Water                                         Report Status                                           Location

CC 01 – Intersection of I-55 and Rt. 104                        SW                                                  -----------------                                         Inside the city limits of Divernon.

CC 02 – W Divernon RD & Auburn Park RD               SW                                                  -----------------                                         Inside the city limits of Divernon.


Source Water Assessments

We want our valued customers to be informed about their water quality.  If you would like to learn more, please feel welcome to attend any of our regularly scheduled meetings.  The source water assessment for our supply has been completed by the Illinois EPA.  If you would like a copy of this information, please stop by Divernon Village Hall or call our operator listed on the first page.  To view a summary version the completed Source Water Assessments, including: importance of Source Water; Susceptibility to Contamination Determination; and documentation / recommendation of Source Water Protection Efforts, you may access the Illinois EPA website at http://www.epa.state.il.us/cgi-bin/wp/swap-fact-sheets.pl.

Otter Lake is utilized by the Otter Lake Water Commission (Facility # 1175200) to provide water to eight communities in Christian, Sangamon and Macoupin Counties and the surrounding rural areas. This facility draws water from Otter Lake through one surface water intake (IEPA #58059). The water is obtained via two 700 and one 1,400 gallon per minute pumps located on an elevated fill roadway bisecting the lake. The supply provides approximately 1.5 million gallons per day to 466 service connections and an estimated population of 16,996. Eight facilities purchase water from the Commission, including Auburn (1670050), Divernon (1670450), Girard (1170450), Pawnee (1670850), Thayer (1671250), Virden (1171100), Nilwood (1170750) and Tovey.

Illinois EPA considers all surface water sources of public water supply to be susceptible to potential pollution problems.  Hence the reason for mandatory treatment of all public water supplies in Illinois.  Mandatory treatment includes coagulation, sedimentation, filtration and disinfection.  Primary sources of pollution in Illinois lakes can include agricultural runoff, land disposal (septic systems) and shoreline erosion.

2010 Regulated Contaminants Detected

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

Lead

7/6 to 7/7/2010

0

15

0

0

ppb

N

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

Copper

7/6 to 7/7/2010

1,300

1,300

0.161

0

ppm

N

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

Water Quality Test Results

Here are a few definitions and scientific terms to know which will help you understand the information in the contaminant detection tables.

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.

Treatment Technique (TT)

A required process intended to reduce the level of a contaminant in drinking water.

Action Level (AL)

The concentration of a contaminant that triggers treatment or other required actions by the water supply.

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.

ppb

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

na

Not applicable.

NTU

Nephelometric Turbidity Units.

pCi/L

Picocuries per liter (a measure of radioactivity).

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.

2010 Regulated Contaminants

Disinfectants & Disinfection Byproducts

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Chloramines

0.5

0.3 – 0.9

MRDLG = 4

MRDL = 4

ppm

N

Water additive used to control microbes.

Haloacetic Acids (HAA5)*

33

22.2 – 42.6

No goal for the total

60

ppb

N

By-product of drinking water chlorination.

Not all sample results may have been used for calculating the Highest Level Detected because some results may be part of an evaluation to determine where compliance sampling should occur in the future.

Total Trihalomethanes (TTHM)*

61

39.7 – 84.8

No goal for the total

80

ppb

N

By-product of drinking water chlorination.

Not all sample results may have been used for calculating the Highest Level Detected because some results may be part of an evaluation to determine where compliance sampling should occur in the future.

2010 Regulated Contaminants Detected From Our Parent Supply – Otter Lake Water Commission

Inorganic Contaminants

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Barium

0.04664

0.04664 – 0.04664

2

2

ppm

N

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

Fluoride

1

1.02 – 1.02

4

4.0

ppm

N

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

Nitrate (measured as Nitrogen)

3

2.868 – 2.868

10

10

ppm

N

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

Sodium

6

5.615 – 5.615

ppm

N

Erosion from naturally occurring deposits: Used in water softener regeneration.

Turbidity

Turbidity is a measurement of the cloudiness of the water caused by suspended particles. We monitor it because it is a good indicator of water quality and the effectiveness of our filtration system and disinfectants.

Limit (Treatment Technique)

Level Detected

Violation

Likely Source of Contamination

Highest Single Measurement

1 NTU

1.06 NTU

N

Soil Runoff

Lowest monthly % meeting limit

0.3 NTU

90.57 %

Y

Soil Runoff

Total Organic Carbon

The percentage of Total Organic Carbon (TOC) removal was measured each month and the system met all TOC removal requirements set, unless a TOC violation is noted in the violations section.

 Inorganic Contaminants

Collection Date

Highest Level Detected

Range of Levels Detected

MCLG

MCL

Units

Violation

Likely Source of Contamination

Cryptosporidium

11/09/2009

0.5

0.5 – 0.5

0

TT

ppm

N

Human and animal fecal waste.

Cryptosporidium is a microbial parasite found in surface water throughout the U.S.  Although filtration removes cryptosporidium the most commonly used filtration methods cannot guarantee 100 percent removal.  Our monitoring of source water and/or finished water indicate the presence of these organisms.  Current test methods do not enable us to determine if the organisms are dead or if they are capable of causing disease.  Symptoms of infection include nausea, diarrhea, and abdominal cramps.  Most healthy individuals can overcome the disease within a few weeks.  However, immuno-compromised people are at greater risk of developing life-threatening illness.  Immuno-compromised individuals are encouraged to consult their doctors regarding appropriate precautions to avoid infection.  Cryptosporidium must be ingested to cause disease and it may be spread through means other than drinking water.

Violations Table

Interim Enhanced SWTR

The Interim Enhanced Surface Water Treatment Rule improves control of microbial contaminants, particularly Cryptosporidium, in systems using surface water, or ground water under the direct influence of surface water.  The rule builds upon treatment technique requirements of the Surface Water Treatment Rule.

Violation Type

Violation Begin

Violation End

Violation Explanation

MONTHLY COMB FLTR EFFLUENT

(IESWTR / LT 1)

7/1/2010

7/31/2010

Turbidity levels, though relatively low, exceeded a standard for the month indicated.  Turbidity (cloudiness) levels are used to measure effective filtration of drinking water.

Corrective Action Taken By The Otter Lake Water Commission

We continue to maintain our ph levels to control the manganese level to prevent high turbidities.