Public Works Department

2007 City of Fredericksburg Water Quality Results

Contaminants in your drinking water are routinely monitored according to federal and state regulations. The tables on this Web page show the most recent results of our monitoring. As you may find some unfamiliar terms within these tables and on the "2007 Annual Water Quality Report" Web page, including definitions provided to help you better understand these terms.

I. Lead and Copper Substances

Substance	Units of Measurement	Action Level	MCLG	Results of samples for the 90th Percentile Value	Action Level Exceedance (Y/N)	Sampling Year	# of Sampling Sites Exceeding Action Level	Typical Source
Lead	ppb	15	0	3	NO	2007	one (1)	Corrosion of household plumbing systems, erosion of natural deposits
Copper	ppm	1.3	1.3	0.15	NO	2007	NONE	Corrosion of household plumbing systems, erosion of natural deposits, leaching from wood preservatives

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 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 (800-426-4791).

II. Turbidity

Substance	Treatment Technique Limits	Level Detected	Violation (Y/N)	Sampling Year	Typical Source
Turbidity	1. 1 NTU Maximum    2. <0.3 NTU 95% of the time	1. highest single       measurement       = 0.17   2. lowest monthly       percentage =       100%	NO	2007	Soil runoff

III. Radiological Substances

Substance	Units of Measurement	MCLG	MCL	Level Detected	Violation (Y/N)	Range of detection at Sampling Points, LOW-HIGH	Sampling Year	Typical Source
Combined Radium	pCi/L	0	5	1.5	NO	N/D-1.5	2002	Erosion of natural deposits
Alpha emitters	pCi/L	0	15	0.5	NO	N/D-0.5	2002	Erosion of natural deposits
Beta/photon emitters	pCi/L	0	50	3.8	NO	1.9-3.8	2002	Decay of natural and man-made deposits

IV. Total Trihalomethanes (TTHMs)

Substance	Units of Measurement	MCLG	MCL	Level Detected	Violation (Y/N)	Range of detection at Sampling Points	Sampling Year	Typical Source
TTHMs	ppb	0	80	29	NO	10 - 40	2007	By-product of drinking water chlorination
HAA5s	ppb	N/A	60	12	NO	1 - 19	2007	By-product of drinking water disinfection

Some people who drink water containing Trihalomethanes (TTHMs) in excess of the MCL over many years could experience problems with their liver, kidneys, or central nervous system and may have an increased risk of getting cancer.

Some people who drink water containing Haloacetic Acids (HAA5's) in access of the MCL over many years may have an increased risk of getting cancer.

V. Other Regulated Substances

Substance	Units of Measurement	MCLG	MCL	Level Detected	Violation (Y/N)	Range of detection at Sampling Points, LOW-HIGH	Sampling Year	Typical Source
Fluoride	ppm	4	4	1.19	NO	0.93-1.2	2007	Erosion of natural deposits; water additive, which promotes strong teeth; discharge from fertilizer; and aluminum factories
Nitrate	ppm	10	10	0.14	NO	0.05-0.14	2007	Runoff from fertilizer use, leaching from septic tanks, sewage, and erosion of natural deposits
95% of water received from Motts Run Water Treatment Plant
Total Organic Carbon	ppm	N/A	TT	1.09	NO	0.69-1.39	2007	Naturally present in environment
Chloramines	ppm	4	4	1.77	NO	0.85-2.15	2007	Water additive used to control microbes

We regularly monitor for various substances in the water supply to meet all regulatory requirements. The tables list only those substances that had some level of detection. Many other substances have been analyzed but were not present or were below the detection limits of the lab equipment.

Much of our water quality data is from testing done in 2007. However, the state allows us to monitor for some substances less than once per year because the concentrations of these substances do not change frequently. Even though some of our data may be more than one year old, it is accurate.

Maximum Contaminant Level's are set at very stringent levels by the U.S. Environmental Protection Agency. In developing the standards EPA assumes that the average adult drinks 2 liters of water each day throughout a 70-year life span. EPA generally sets MCLs at levels that will result in no adverse health effects for some substances or a one-in-ten-thousand to one-in-a-million chance of having the described health effect for other substances.

VIOLATION INFORMATION: The Fredericksburg Water Distribution System did not have any violations for contaminants during the year. Also, we are pleased to report to you that there were no detection of total coliforms or e-coli in the monthly samples collected during calander year 2007.

This Drinking Water Quality report was prepared by: J. W. Roberts, Superintendent of Public Works