Water
Quality Report
for 2006
| Dunlap | |
Water |
|
| System |
Water
Quality Report
for 2006
|
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. |
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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 www.state.tn.us/environment/dws/dwassess.php 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. |
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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, 2006 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.
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 |
Level found in CCR Units |
Range |
Violations |
Date |
Typical Source of Contamination |
Total Coliform Bacteria |
0 | <1 positive sample | 0 | 0 | No | 2006 | Naturally present in the environment |
Turbidity |
n/a | TT (95%<0.5) NTU |
0.10 AVG. |
0.06 - 0.33 | No | 2006 |
|
|
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 | 1.5 ppm | No | 2006 | Discharge from petroleum and metal refineries; Erosion of natural deposits; Discharge from mines | |
|
Fluoride |
4 ppm | 4 ppm | 1.06 ppm | .80 - 1.26 | No | 2006 | Water additive for strong teeth, erosion of natural deposits |
TTHM's |
0 | 80 ppb | 38 ppb avg. |
31- 46 | No | 2006 | Disinfection By-Products |
|
Halo Acedic |
0 | 60 ppb | 42 ppb avg. |
33 - 52 | No | 2006 | Disinfection By-Products |
| ** Total Organic Carbon ( TOC) |
TT | TT | 0.90 ppb avg. |
.50 - 1.4 | No | 2006 | Naturally present in the environment |
|
Chlorine |
4 ppm | 4 ppm | 1.60 ppm avg. |
1.0 - 2.1 | No | 2006 | Added Disinfectant |
|
Nitrate |
0 | 100 | .78 ppm | No | 2006 | 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 2006
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.
