Water Quality Report

Dunlap
Water
	System

Water Quality Report
for 2007

The Dunlap Water System is pleased to present you with our annual water quality report. The report is designed to raise awareness of where our water comes from, understand treatment processes, and educate on source water protection. This will allow you, the consumer to make informed decisions about your drinking water. More information can be obtained from Philip Roberson at 949.3121 or E.P.A.'s Safe Drinking Water Hotline at 1.800.426.4791

Links:

American Water Works Association.....	www.awwa.org
Environmental Protection Agency.....	www.epa.gov
Tennessee Department of Environment & Conservation...	www.state.tn.us/environment
National Rural Water Association.....	www.nrwa.org

Where Does Our Water Come From?

The source water used for the Dunlap Water System is the Sequatchie River.
The origins of the Sequatchie River begins in the Grassy Cove Community
in Cumberland County. The river flows down the heart of the Sequatchie Valley where we draw out our water east of Dunlap off Old York Highway.

rivermap1a.GIF (18152 bytes)

Source Water Assessment

The Tennessee Department of Environment and Conservation has prepared a Source Water Assessment Program Report for untreated water sources. The report assesses the susceptibility of untreated water sources to potential contamination. To ensure safe drinking water, all public water systems treat and routinely test their water. Water sources have been rated as reasonably susceptible based on geological factors and human activities in the vicinity of the water source. Our rating is moderately susceptible. An explanation of the Tennessee Source Water Assessment Program, the Source Water Assessment summaries, susceptible scorings and the overall TDEC report to EPA can be viewed at http://tennessee.gov/environment/dws/dwassess.shtml or you may contact the water system to obtain copies of specific assessments.

For Your Information

The TVA estimated 7 day, 10 year minimum flow on the Sequatchie River at our intake is 10.7 million gallons per day.

To find daily flows on the Sequatchie River at Old York Highway:
http://waterdata.usgs.gov/tn/nwis/uv?03570835

To find daily flows on the Sequatchie River:
http://lakeinfo.tva.gov/htbin/streaminfo

Public Participation

The Dunlap Water System conducts monthly business during regular City Commission Meetings which are scheduled the 1st Thursday of each month at 6:00pm.

The Dunlap Water System routinely monitors for constituents in your drinking water according to Federal and State laws. The following table shows the results of our monitoring for the period of January 1st to December 1st, 2007 unless otherwise posted. All drinking water, including bottled drinking water, may be reasonably expected to contain at least small amounts of some constituents. It's important to remember that the presence of these constituents does not necessarily pose a health risk.

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 transplant, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections.
These people should seek advise from their health care providers about drinking water. EPA/CDC guidelines on appropriate means to lessen the risk of infection by cryptosporidium and other microbiological contaminants are available from the Safe Drinking Water Hotline 1.800.426.4791.

The Bottom Line......

The Dunlap Water System water quality meets and exceeds State and Environmental Protection Agency standards.

Test Results

Contaminant

MCL in CCR Units

MCL
in CCR
Units

Level found in CCR
Units

Range
of
Detections

Violations
Y / N

Date
of
Sample

Typical Source of Contamination

Total Coliform Bacteria	0	>1 positive sample	0	0	No	2007	Naturally present in the environment
Turbidity	n/a	TT (95%<0.5) NTU	0.10 AVG.	0.04 - 0.23	No	2007	Soil Runoff
Copper*	1.3	Al=1.3 ppm	90th % = 0.09 ppm		No	2005	Corrosion of household plumbing systems, erosion of natural deposits; leaching form wood preservatives
Lead*	0	Al=15 ppb	90th % = 3 ppb		No	2005	Corrosion of household plumbing systems; erosion of natural deposits
Sodium	n/a	n/a	1.64 ppm		No	2007	Discharge from petroleum and metal refineries; Erosion of natural deposits; Discharge from mines
Fluoride	4 ppm	4 ppm	1.03 ppm	.89 - 1.22	No	2007	Water additive for strong teeth, erosion of natural deposits
TTHM's Trihalomethanes	0	80 ppb	59 ppb avg.	36- 87	No	2007	Disinfection By-Products
Halo Acedic Acids	0	60 ppb	49 ppb avg.	24 - 67	No	2007	Disinfection By-Products
** Total Organic Carbon ( TOC)	TT	TT	1.28 ppb avg.	.80 - 1.8	No	2007	Naturally present in the environment
Chlorine	4 ppm	4 ppm	1.89 ppm avg.	1.5 - 2.2	No	2007	Added Disinfectant
Nitrate (as Nitrogen)	0	100	<1.0 ppm	n/a	No	2007	Runoff from fertilizer use, leaching from septic tanks, sewage, erosion of natural deposits

* 0 out of 20 site sampled had a level exceeding the lead and copper action level.

Turbidity does not present any health risk. We monitor turbidity, which is a measurement of the cloudiness of water, because it is a good indicator the filtration system is functioning well.

** The treatment technique for total carbon was met at 100% in 2007

Some people who drink water containing trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous system, and may have an increased risk of getting cancer.

Parts Per Million (ppm) or Milligrams Per Liter (mg/l)
One part per million corresponds to one minute in two years or a single penny in $10,000.

Parts Per Billion (ppb) or Micrograms Per Liter
One part per million corresponds to one minute in 2,000 years, or a single penny in $ 10,000,000.

Picouries Per Liter (pCi/L)
Picouries per liter is a measurement of the radioactivity in water.

Nephelometric Turbidity Unit (NTU)
Nephelometric turbidity unit is a measurement of clarity of water. Turbidity in excess of 5 NTU is just noticeable
to the average person.

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

Treatment Technique (TT) - (mandatory language)
A treatment technique is a required process intended to reduce the level of a contaminant in drinking water.

Maximum Contaminant Level - (mandatory language)
The "Maximum Allowed" (MCL) is 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 Contaminant Level Goal - (mandatory language)
The "Goal" (MCGL) is the level of a contaminant in drinking water below which there is no known or expected
risk to health. MCGLs allow for a margin of safety.