2007 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.
Florida's Department of Environmental Protection is in the process of conducting Source Water Assessment (SWA) for all public water systems throughout Florida. These assessments will identify and assess any potential sources of contamination in the vicinity of our water supply. A SWA was conducted for this system in 2006. It found that some of our system's wells are at low risk for contamination from one domestic wastewater source and moderate risk from two petroleum storage tanks. A SWA report for this system is available at the DEP SWAPP web site: www.dep.stale.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 pick up 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 ofour regularly scheduled meetings. They are held on the first and third Tuesday of the month at 9:00 am at the Sunlight Community Church at 477 SW Cashmere Blvd., 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 I to December 31, 2007. Data obtained before January I, 2007, 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 ofa contaminant in drinking water below  which there is no known or expected risk to health. MCI.Gs 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/1) - one part by weight of analyte to I billion parts by weight of the water sample. Parts per million (ppm) or Milligrams per liter (mg/I)- one part by weight ofanalyte to I million parts by weight of the water sample. Picocurie per liter (pCi/L) - measure of the radioactivity in water.
Initial Distribution System Evaluation (IDSE): An important part of the Stage 2 Disinfection Byproducts Rule (DBPR). The IDSE is a one­ time study conducted by water systems to identify distribution system locations with high concentrations of trihalomethanes (THMs) and haloacetic acids (HAAs). Water systems will use results from the IDSE, in conjunction with their Stage I DBPR compliance monitoring data, to select compliance monitoring locations for the Stage 2 DBPR.

Contaminant and
Unit of Measurement	Dates of
sampling lmo./vr.l	MCL
Violation
YfN	Level
Detected	Range of Results	
MCLG	
MCL	
Likely Source of Contamination	
Inorganic Contaminants	
Chromium (ppb)	1012006	N	1.9	N/A	100	100	Discharge from steel and pulp mills; erosion of natural de□osits	

Fluoride (ppm)	
01-12/2007	
N	
.92	
0.58-0.92	
4	
4.0	Erosion of natural deposits; discharge from
fertilizer and aluminum factories. Water additive which promotes strong teeth when at ootimum levels between 0.7 and 1.3 ......m	
Sodium (ppm)	1012006	N	64.8	N/A	N/A	160	Salt water intrusion, leaching from soil	

Stage 1 Disinfectants and Disinfection ByHProducts	
For bromate, chlorumines, or chlorine, the level detected is the the highest running annual average (RAA), computed quarterly, of monthly averages of all samples collected. For haloacetic acids or TIHM, the level detected is the highest RAA, computed quarterly, of quarterly averages of all samples collected if the system is monitoring quarterly or is the average ofnll samples taken during the year if the system monitors less frequently than quarterly. Range of Results is the range of individual sample results (lowest to highest) for nil monitoring locations, including Initial Distribution System Evaluation (IDSE) results as well as Stage I compliance results.	
Disinfectnnt or Contnminant und Unit or Meusurement	Dutes of sumpling (moJyr.)	MCLor
MRDL
Vlolutlon
YIN	
Level Detected	Runge of  Results	
MCLG
or
MRDLG	
MCLor MRDL	
Likely Source of Contuminution	
Chlorine (ppm)	
01-12/2007	N	1.7	1.2-2.2	MRDLG
=4	MRDL=
4.0	Water additive used to control microbes	
Haloacetic Acids (five)
(HAAS) (ppb)	0I,04,08, l012007	N	7.2	4.4- IO.a	NA	MCL=
60	By-product of drinking water disinfection	
TIHM [Totol
trihalomethanes] {ppb)	0I,04,08,IOl2007	N	I 1.9	3.5-
22.9	NA	MCL=
80	By-product of drinking water disinfection	

Contamimmt and Unit or Mensurement	Dntes of
snmpling (moJvr.)	AL Violntion
YIN	90th
Percentile Result	No. orsumpling sites exceeding the AL	
MCLG	AL
(Action Level)	
Likely Source or Contnmination	
Leud und Copper (Tap Wuter)	

Copper (tap water) {ppm)	
0612007	
N	
.087	
a	
1.3	
1.3	Corrosion of household plumbing systems; erosion ofnnturnl deposits; leachin11 from wood nreservatives	
Leud (tap water) (ppb)	0612007	N	5.7	a	a	15	Corrosion of household plumbing systems, erosion of natural deposits	
Infants and young children are typically more vulnerable to lead in drinking water than the general population. It is possible that lead levels at your home may be higher than at other homes in the community as a result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before using tap water. Additional information is available from the Safe Drinking Water Hotline (1-800-426-4791).
The sources of drinking waler (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 subslances 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, seplic systems, agricultural livestock operations, and wildlife.
Inorganic contaminants, such as salts and melals, 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 stonnwater runoff, and septic systems.
Radioactive conlaminants, 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 amount of certain conlaminants in water provided by public water systems. The Food and Drug Administration (FDA) regulations eslablish limils 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 1-800-426-479
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. EPNCDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbiological contaminants are available from the Safe Drinking Water Hotline (800-426-4791).
We at the St. Lucie West Services District would like you Io understand the efforls we make  to continually  improve  Ihe waler  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 Io call any of the numbers !isled.