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Jun 01 : 12:00
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2015 Annual Water Quality Report
for the city of Mountain Park

by editor

A printed version is at City Hall, or link to see the document on the city's Website.

Cobb County – Marietta Water Authority
CCMWA Consecutive System
2015 Annual Water Quality Report

This is an annual report on the quality of water delivered by the Cobb County – Marietta Water Authority. This report meets the federal Safe Drinking Water Act (SDWA) requirements for the Consumer Confidence Report (CCR) and contains information on the source of our water, its constituents, and the health risks associated with any contaminants. This document is intended to be used by the wholesale customers of the CCMWA to prepare their CCRs.
Safe water is vital to our community. Please read this report carefully, and if you have any questions, contact Karen Segars at 770.993.4231.

Overview

Water Source

The Cobb County – Marietta Water Authority has two (2) surface water sources supplying two treatment facilities. The Wyckoff Treatment Division is supplied from Allatoona Lake, a Corps of Engineers impoundment in north Cobb, south Cherokee and south Bartow counties. The Quarles Treatment Division receives water from the Chattahoochee River.
Cobb County – Marietta Water Authority and the Atlanta Regional Commission completed a source water assessment itemizing potential sources of water pollution to our surface drinking water supplies. This information can help you understand the potential for contamination of your drinking water supplies and can be used to prioritize the need for protecting drinking water sources.
A Source Water Assessment is a study and report which provides the following information:
- Identifies the area of land that contributes the raw water used for drinking water,
- Identifies potential sources of contamination to drinking water supplies, and
- Provides an understanding of the drinking water supply’s susceptibility to contamination.
For more information on this project visit the Source Water Assessment website at link or you can request information by mail from the ARC:
Attn: Source Water Assessment
Environmental Planning Division
Atlanta Regional Commission
40 Courtland Street, NE
Atlanta, GA. 30303

An explanation of the Water Quality Data Table

The table shows the results of our water quality analyses. Every contaminant regulated by EPA that was detected in the water, even in the minutest traces, is listed here. The table contains the name of each substance, the highest level allowed by regulation (MCL), the ideal goals for public health (MCLG), the usual sources of such contamination, footnotes explaining our finding, and a key to units of measurement. Definitions of MCL, MCLG, AL, and TT are important:

Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water. MCL’s are set as close to the MCLG’s 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.
Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must implement.
Treatment Technique (TT): A required process intended to reduce the level of a contaminant in drinking water.
Maximum Residual Disinfectant Level (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 microbiological contaminants.
Maximum Residual Disinfectant Level Goal (MRDLG): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLG’s do not reflect the benefits of the use of disinfectants to control microbial contaminants.

The data presented in this report are from the most recent testing done in accordance with regulations.

Key to Table
AL – Action Level ppm – parts per million or milligrams per liter (mg/L)
MCL – Maximum Contaminant Level ppb – parts per billion or micrograms per liter (µg/L)
MCLG – Maximum Contaminant Level Goal: TT – Treatment Technique
NTU – Nephelometric Turbidity Unit n/a – not applicable
MRDL – Maximum Residual Disinfectant Level n/d – not detected
MRDLG – Maximum Residual Disinfectant Level Goal BDL – Below Detection Limits

Inorganic Contaminants
Contaminant Date Tested Unit MCL MCLG Detected Level Range Major Sources Violation
Fluoride1 2015 ppm 4 4 0.94 0.63 – 0.94 Erosion of natural deposits; water additive which promotes strong teeth NO
Lead2 2014 ppb AL =15 0 3.3 n/a Corrosion of household plumbing systems. NO
Copper3 2014
ppm
AL =1.3 0 0.046 n/a Corrosion of household plumbing systems. NO
Nitrate/Nitrite4 2015 ppm 10 10 1.2 BDL – 1.2 Runoff from fertilizer use; leaching from septic tanks; erosion of natural deposits NO
Notes:
1Fluoride is added to water to help in the prevention of dental cavities (caries) in children.
2Of the 50 sites tested 2 exceeded the action level. The next round of testing is due in 2017.
3Of the 50 sites tested none exceeded the action level. The next round of testing is due in 2017.
4Nitrate and Nitrite are measured together.

Disinfection By-Products, By-Product Precursors and Disinfectant Residuals
Contaminant Date Tested Unit MCL MCLG Detected Level Range Major Sources Violation
TTHMs (Total Trihalomethanes)
Stage 2 2015 ppb 80 0 50.01
Highest LRAA at site 501 48.0 –50.0 By-products of drinking water disinfection NO

HAA5s ( Haloacetic Acids) Stage 2 2015 ppb 60 0 28.01 Highest LRAA at site 501 21.0–28.0 By-products of drinking water disinfection NO

TOC(Total Organic Carbon) 2015 ppm TT n/a 2.2 1.1 –2.2 Decay of organic matter in the water withdrawn from sources such as lakes and streams NO
Chlorite 2015 ppm 1.0 0.8 0.27 0.01 – 0.27 Byproduct of drinking water disinfection NO
Chlorine Free 2015 ppm MRDL = 4 MRDLG = 4 2.09 0.04– 2.09 Drinking water disinfectant NO
Note:
1The highest detected LRAA (Locational Running Annual Average).


Turbidity
Contaminant MCL MCLG Level Found Range Sample Date Violation Typical source
Turbidity3 TT = 1 NTU 0 0.21 n/a 2015 NO Soil runoff
TT = percentage of samples <0.3 NTU 100% n/a
Note:
3Turbidity is a measure of the cloudiness of the water. We monitor it because it is a good indicator of water quality. High turbidity can hinder the effectiveness of disinfectants.


Microbiological Contaminants
Contaminant MCL MCLG Highest level detected (%) Average detected level (%) Violation
Total coliform bacteria <5% positive samples during a monthly sampling period 0% positive samples during a monthly sampling period 0% 0% NO
Escherichia coli (E. coli) bacteria <5% positive samples during a monthly sampling period 0% positive samples during a monthly sampling period 0% 0% NO
The CCMWA did not encounter any positive samples during 2015. However your system may have had positive samples. If so, enter those data into this table in the appropriate columns. If the CCMWA Laboratory performs your microbiological sampling and analysis, attached to this report is a summary of the number of samples run and the number of positive samples your system had during 2015.

Cryptosporidium Information
Cryptosporidium is a microbial pathogen found in surface water throughout the U.S.
Although filtration removes Cryptosporidium, the most commonly-used filtration methods cannot guarantee 100 percent removal. Ingestion of Cryptosporidium may cause cryptosporidiosis, an abdominal infection. Symptoms of infection include nausea, diarrhea, and abdominal cramps. Most healthy individuals can overcome the disease within a few weeks. However, immuno-compromised people, infants and small children, and the elderly are at greater risk of developing life threatening illness. We encourage immuno-compromised individuals to consult their doctor regarding appropriate precautions to take to avoid infection. Cryptosporidium must be ingested to cause disease, and it may be spread through means other than drinking water. The monitoring of our source water performed in 2013 had no detection of cryptosporidium. Testing was only required for a period of nine months in 2013.


Required Additional Health Information

To ensure tap water is safe to drink, EPA (Environmental Protection Agency) prescribes limits on the amount of certain contaminants in water provided by public water systems. The Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water.

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 1.800.426.4791.

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. City of Mountain Park is responsible for providing high quality drinking water, but 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 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 link.

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 radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water include:

a) Microbial contaminants such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations and wildlife.

b) 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.

c) Pesticides and herbicides which may come from a variety of sources such as agriculture, storm water runoff, and residential uses.

d) Organic chemical contaminants, including synthetic (man-made) and volatile organics, which are by-products of industrial processes and petroleum production, and can also come from gasoline stations, urban storm water runoff, and septic systems.

e) 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 people, and infants can be particularly at risk. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium are available from the EPA’s Safe Drinking Water Hotline at 1.800.426.4791.

For the person(s) responsible for preparing the system’s report, information about this report can be obtained from Karen Segars, City of Mountain Park, 770.993.4231.

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