City of Savannah Water Resources Department

Wilmington Island System

Water System Number GA0510229

Notice of Violation: Monitoring requirements not met for reporting period.

The City of Savannah Water Supply and Treatment department is pleased to report that your drinking water, supplied by the Wilmington Island System, is safe. To learn more about safety regulations and testing, see the table included in this report.


Underground water source
Drinking water for the Wilmington Island System comes from the Floridan Aquifer. It is drawn from wells between 340 and 576 feet deep. In 2020, the Wilmington Island System produced 540 million gallons of groundwater for a population of 13,980.
The City of Savannah has been proactive in protecting this pristine drinking water source through responsible management with a state-approved Wellhead Protection Plan and Water Conservation Plan.


Treated water
Water pumped from the Floridan Aquifer is very pure. For treatment, we add a disinfectant during distribution and fluoride to promote dental health.


Tested drinking water
In order to ensure that tap water is safe to drink, the Environmental Protection Agency regulates the amounts of certain substances allowed in public drinking water. The City of Savannah performed over 131,000 tests and procedures, on over 160 water quality parameters in 2020 to ensure that you receive safe, high quality drinking water.


Glass of clean drinking water
This clean, safe, drinking water is then distributed to your home. The City of Savannah provides some of the highest quality, most affordable drinking water in the Southeast.

Tap Water Vs. Bottled Water

All sources of drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some substances. All water sources are fed by water that passes over the land or through the ground, dissolving naturally occurring minerals and materials, or picking up substances along the way. These substances may include:

  1. Biological substances from humans, agriculture, or wildlife sources
  2. Inorganic substances from stormwater runoff, industrial sources, or wastewater discharges
  3. Insecticides and herbicides from agriculture, stormwater runoff or residential use
  4. Organic chemicals from industrial or domestic processes, stormwater runoff, or septic systems
  5. Radioactive materials that can be naturally occurring or the result of mining or other human activities

The difference is in how they are regulated. Your tap water is much more stringently regulated – it is tested hundreds of times a month for over 100 different contaminants. Bottled water, on the other hand, is only required to be tested once a week for some substances. Higher levels of at least 13 contaminants are allowed in bottled water than tap water. And tap water providers are required to share their quality in reports such as this one, and to notify the public if a potentially dangerous contaminant is found. Bottled water providers are not required to provide the public with this information.

If you drink the recommended 8 cups of water a day of tap water it will cost you $0.50 a year. The same amount of bottled water will cost $1,400 a year. That's 3000x the price for a less safe product!

Drinking Water Analysis

The City has met all sampling and reporting requirements.

Substance tested and detected
Total Triahlomethanes (TTHMs)
Haloacetic Acids (HAA5)
Probable Source
Water additive used to control microbes Erosion of natural deposits, water additive to promote strong teeth Byproduct of water chlorination Byproduct of water chlorination Corrosion of household plumbing Corrosion of household plumbing
Amount Detected
2.17 ppm 0.75 ppm 16.4 ppb 2.2 ppb 1 ppb
(90th Percentile)
0.11 ppm
(90th Percentile)
Meets Drinking Water Standards
Maximum Disinfectant Residual Level Goal
The level of a drinking water disinfectant below which there is no known or expected risk to health.
4 ppm
Maximum Disinfectant Residual Level Allowed
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.
4 ppm
Maximum Contaminant Level Goal
The level of contaminant in drinking water below which there is no known or expected risk to health, allowing for a margin of safety.
4 ppm 0 ppb 0 ppb 0 ppb 1.3 ppm
Maximum Contaminant Level Allowed
The highest level of a contaminant that is allowed in drinking water. This level is set as close to the goal as feasible using the best available treatment technology.
4 ppm 80 ppb 60 ppb
Action Level
The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
15 ppb 1.3 ppm
Range Detected During Reporting Year
0.30-2.17 ppm 0.73-0.75 ppm Not detected - 16.4 ppb Not detected - 2.2 ppb No sample greater than action level No sample greater than action level
Units: ppm = part per million or 1 in 1,000,000. ppb = parts per billion or 1 in 1,000,000,000.
Copper and lead are the only two substances monitored at the customer's tap. They were last sampled in 2019.

Unregulated Contaminant Monitoring

Amount Detected
0.56 ppb 373 ppb 0.013 ppb
Range Detected During Reporting Year
0.39-0.77 ppb 338-388 ppb Not detected - 0.076 ppb

The U.S. Environmental Protection Agency (EPA) selected the City of Savannah to participate in the Unregulated Contaminant Monitoring Regulation 3 (UCMR 3) program. Unregulated contaminants are those for which EPA has not established drinking water standards. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted.

If you have any questions regarding safe drinking water regulations or these test results, you may contact the City of Savannah Water Supply and Treatment Department at (912) 964-0698.

Health Information

Some people may be more vulnerable to contaminants in drinking water than the general population. Immune-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 healthcare providers.

EPA/Center for Disease control guidelines on appropriate means to lessen the risks of infection by Cryptosporidium and other microbial contaminants are available from the 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. The City of Savannah is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing fixtures. 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 have concerns 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 at 1-800-426-4791 or at