2018 Annual Drinking Water Quality Report
St. Lucie West Services District
We're pleased to present to you this year's Annual Water Quality Report. This report is designed to inform you about the quality water and services we deliver to you every day.  Our constant goal is to provide you with a safe and dependable supply of drinking water. We want you to understand the efforts  we make to continually improve the water treatment process and protect our water resources. We are committed to ensuring the quality of our water. Our water source is ground water from the Floridan aquifer. The water is then treated by reverse osmosis, chlorinated for disinfection, fluoride is added to help prevent tooth decay, and phosphate is added for corrosion control.
In 2017 the Department of Environmental Protection performed a Source Water Assessment (SWA) on our system. The assessment was conducted to provide information about any potential sources of contamination in the vicinity of our wells. There are seven potential sources of contamination identified for this system with a low susceptibility level. A SWA report for this system is available at the DEP SWAPP web site: www.dep.state.fl.us/swapp.
We are pleased to report that our drinking water meets all federal and state requirements.
If you have any questions about this report or concerning your water utility, please contact Rick Riniolo at (772)340-0220. You may pickup a copy of this report at 450 SW Utility Dr. Port Saint Lucie, Florida 34986. We encourage our valued customers to be informed about their water utility. If you want to learn more, please attend any of our regularly scheduled meetings. They are held on the first Tuesday of the month at 9:00 am at St Lucie West Services District main office, 450 SW Utility Dr., Port Saint Lucie, Fl 34986.
St. Lucie West Services District routinely monitors for contaminants in our drinking water according to Federal and State laws, rules, and regulations. Except where indicated otherwise, this report is based on the results of our monitoring for the period of January 1 to December 31, 2018. Data obtained before January 1, 2018 and presented in this report are from the most recent testing done in accordance with the laws, rules, and regulations.
In the table below, you may find unfamiliar terms and abbreviations. To help you better understand these terms we've provided the following definitions:
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.
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.
Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
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.
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.
 “ND” means not detected and indicates that the substance was not found by laboratory analysis.
Parts per billion (ppb) or Micrograms per liter (µg/l) – one part by weight of analyte to 1 billion parts by weight of the water sample. Parts per million (ppm) or Milligrams per liter (mg/l) – one part by weight of analyte to 1 million parts by weight of the water sample. Picocurie per liter (pCi/L) - measure of the radioactivity in water.
Locational Running Annual Average (LRAA): the average of sample analytical results for samples taken at a particular monitoring location during the previous four calendar quarters.

Inorganic contaminants	
Contaminant and Unit of Measurement	Dates of sampling (mo./yr.)	MCL
Violation Y/N	Level Detected	Range of Results	
MCLG	
MCL	Likely Source of Contamination	
Chromium (ppb)	4/17	N	1.2	N/A	100	100	Discharge from steel and pulp mills; erosion of natural
deposits	

Fluoride (ppm)	

4/17	

N	

0.91	

N/A	

4	

4.0	Erosion of natural deposits; discharge from fertilizer and aluminum factories. Water additive which promotes strong teeth when at optimum levels
between 0.7 and 1.3 ppm	

Selenium (ppb)	
4/17	
N	
6.7	
N/A	
50	
50	Discharge from petroleum and metal refineries; erosion of natural deposits; discharge from mines	

Sodium (ppm)	4/17	
N	
67.5	
N/A	
N/A	
160	Salt water intrusion, leaching from soil	

Stage 1 Disinfectants and Disinfection By-Products	

For bromate, chloramines, or chlorine, the level detected is the the highest running annual average (RAA), computed quarterly, of monthly averages of all samples collected. The range of results is the range of results of all the individual samples collected during the past year.	
Disinfectant or Contaminant and Unit of Measurement	
Dates of sampling (mo./yr.)	MCL or MRDL
Violation Y/N	
Level Detected	
Range of Results	MCLG
or   MRDLG	
MCL or MRDL	
Likely Source of Contamination	
Chlorine (ppm)	01-12/2018	N	1.9	1.7-2.5	MRDLG
= 4	MRDL = 4.0	Water additive used to control microbes	

Stage 2 Disinfectants and Disinfection By-Products	
For haloacetic acids and TTHMs, the level detected is the highest locational running annual average (LRAA) of all samples collected. The range of results is the range of results of all individual samples collected during the past year.	

Contaminant and Unit of Measurment	
Dates of sampling (mo./yr.)	MCL or MRDL
Violation Y/N	
Level Detected	
Range of Results	
MCLG	
MCL	
Likely Source of Contamination	
Haloacetic Acids (five)
(HAA5) (ppb)	8/18	N	15.4	14.7-15.4	NA	MCL = 60	By-product of drinking water
disinfection	
TTHM [Total trihalomethanes] (ppb)	8/18	N	17.8	13.4-17.8	NA	MCL = 80	By-product of drinking water disinfection	

Lead and Copper (Tap Water)	

Contaminant and Unit of Measurement	
Dates of sampling (mo./yr.)	
AL
Violation Y/N	
90th Percentile Result	No. of sampling sites exceeding
the AL	

MCLG	
AL (Action Level)	

Likely Source of Contamination	
Copper (tap water) (ppm)	06/2017	N	0.111	0	1.3	1.3	Corrosion of household plumbing systems	
Lead (tap water) (ppb)	06/2017	N	2.00	0	0	15	Corrosion of household plumbing
systems	
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. St. Lucie West Services District 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 http://www.epa.gov/safewater/lead.
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 pick up substances resulting from the presence of animals or from human activity.
Contaminants that may be present in source water include:
Microbial contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
Inorganic contaminants, such as salts and metals, which can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.
Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems.
Radioactive contaminants, which can be naturally occurring or be the result of oil and gas production and mining activities.
In order to ensure that tap water is safe to drink, the EPA prescribes regulations, which limit the amounts of certain contaminants in water provided by public water systems. The Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water, which must provide the same protection for public health.
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 the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline at 1(800) 426-4791.
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 microbiological contaminants are available from the Safe Drinking Water Hotline 1 (800) 426-4791.
We at St. Lucie West Services District would like you to understand the efforts we make to continually improve the water treatment process and protect our water resources. We are committed to insuring the quality of your water. If you have any questions or concerns about the information provided, please feel free to call any of the numbers listed.