We are 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 are pleased to report that our drinking water is safe and meets all Federal and State requirements. Our water source is surface water that comes from Ralston Reservoir. If you have any questions about this report or concerning your water utility, please contact Rick Jeschke at 303-279-2854.

We want our valued customers to be informed about their water utility. If you want to learn more, please call the above contact about the utility or any scheduled public meetings. North Table Mountain Board of Directors meetings are open to the public and are held every second and fourth Tuesday of the month at the District office at 6:00 pm.

All public water systems are required to have a Source Water Assessment and Protection Program, which is designed to safeguard water resources from contamination. Assessment maps which delineate North Table Mountain’s watershed boundaries and potential sources of contamination are available. The state is issuing Source Water Assessment Reports for all public water systems. This is simply an indication of potential future risks associated with the source water supply. Interested individuals should call the above contact, or view the report at: www.cdphe.state.co.us/wq/sw/swaphom.html.

North Table Mountain Water routinely monitors for constituents in your drinking water according to Federal and State laws. This report shows the results of our monitoring for the period of January 1, 2007 to December 31, 2007 unless otherwise noted. All drinking water, including bottled drinking water, may be reasonably 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. 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 of infections. These people should seek advice about drinking water from their health care providers. For more information about contaminants and potential health effects, or to receive a copy of the U.S. Environmental Protection Agency (EPA) and the U.S. Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by cryptosporidium and microbiological contaminants call the EPA Safe Drinking Water Hotline at 1-800-426-4791.

Chemicals which were tested for, but not detected include: antimony, arsenic, beryllium, cadmium, nickel, mercury, selenium, thallium, all volatile organic chemicals and all synthetic organic chemicals. The state has issued our system waivers for asbestos, cyanide, dioxin, glyphosate, and nitrite due to non-detection or extremely low concentrations.

The EPA has established a new drinking water standard for arsenic because of special concerns that the former standard may not have been stringent enough. Arsenic is a naturally occurring mineral known to cause cancer in humans at high concentrations. Arsenic levels above the new standard of 10 ppb warrant public concern. Arsenic is at less than detectable levels in NTM samples.

Nitrate in drinking water at levels above 10 ppm is a health risk for infants of less than six months of age. High nitrate levels in drinking water can cause blue baby syndrome. Nitrate levels may rise quickly for short periods of time because of rainfall or agricultural activity. If you are caring for an infant, and detected nitrate levels are above 5 ppm, you should ask advice from your health care provider. For North Table Mountain Water nitrate/nitrite levels, refer to Inorganic Chemical Contaminant table. Levels of nitrate/nitrite in the District are low.

Infants and young children are typically more vulnerable to lead in drinking water than the general population. It is possible that lead levels in your home may be higher than at other homes in the community as a result of the 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. Flush your tap for 30 seconds to 2 minutes before using tap water. Additional information is available from the Safe Drinking Water Hotline at 1-800-426-4791, or on-line at www.epa.gov/safewater. For North Table Mountain Water lead levels, refer to the Lead and Copper table. Levels of lead in District are low.

Cryptosporidium: Cryptosporidium is a microscopic organism that, when ingested can result in diarrhea, fever and other gastrointestinal symptoms. North Table Mountain Water has tested for crypto in both raw and treated water and has never detected it in either. The organism is in many of Colorado's rivers and streams and comes from the animal waste in the watershed. Crypto is eliminated by an effective treatment combination including filtration, sedimentation, and disinfection. EPA / CDC guidelines on appropriate means to lessen the risk of infection by cryptosporidium and microbiological contaminants are available from the Safe Drinking Hotline above.

Please call our office at 303-279-2854 if you have questions.

Turbidity - Turbidity measurements indicate the clarity of the water. High levels may interfere with disinfection. Samples must be less than or equal to 0.3 NTU in at least 95% of monthly samples. One hundred percent of the NTM samples taken were less than 0.3 NTUs.

Turbidity	MCLG	MCL	Highest Level Found	Sample Date	Violation	Source of Contamination
Plant Clearwell	0	Treatment Technique	0.12	Hourly	NO	Soil Runoff

NTU - Nephelometeric Turbidity Unit, measurement of the clarity of water.
Treatment Technique - A required process intended to reduce the level of a contaminant in drinking water.

---

Total Coliform Bacteria - Presence of coliform bacteria is an indicator of pathogens (disease causing bacteria). One hundred percent of the NTM samples taken were absent (no bacteria present).

Total Cloriform Bacteria	MCLG	MCL	Level Detected	Sample Date	Violation	Source of Contamination
Distribution System	0	Presence of Coliform Bacteria in one of Monthly Samples	Absent in 100% of all Samples Taken	10 per month	NO	Naturally Present in the Environment

---

North Table Mountain is currently subject to new water quality compliance criteria concerning treatment optimization and the use of chlorine as a disinfectant. The following three tables present chemical parameters which must be routinely monitored and regulated.

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 microbial contaminants. MRDL compliance is determined on a District-wide basis by calculating a running annual average of all sample times at all sample points.

Maximum Residual Disinfectant Level	MRDLG	MRDL	Sample Date	Range	Running Annual Average	Violation	Source of Contamination
Distribution System	4 ppm	4.0 ppm	2007	0.3 - 1.2 ppm	0.7 ppm	NO	Water additive used to control microbes

MRDLG - Maximum Residual Disinfectant Level Goal - 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.

Total Organic Carbon (TOC) - This constituent has no health effects. However, total organic carbon provides a medium for the formation of disinfection byproducts. Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects. TOC compliance is determined by calculating a running annual average of all samples taken from the Water Treatment Plant's finished water, clearwell. The compliance factor is 1.0 (measurements should not be lower than this factor).

Total Organic Carbon	Sample Date	MCLG	MCL	Lowest Running Annual Average	Rate	Highest Running Annual Average	Violation	Source of Contamination
Plant Clearwell	2007	0 ppm	2.0 ppm	1.45 ppm	1.31 - 2.75 ppm	1.81 ppm	NO	Naturally present in the environment

Total Trihalomethanes (TTHMs) and Haloacetic Acids (HAA) - Total organic carbon provides a medium for the formation of disinfection byproducts. These byproducts include TTHMs and HAA. Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects, liver or kidney problems, or nervous system effects, and may lead to an increased risk of getting cancer. TTHM and HAA compliance is determined on a District-wide basis by calculating a running annual average of all sample times at all sample points.

Disinfection Byproduct	MCLG	MCL	Sample Date	Range	Highest Annual Average	Violation	Source of Contamination
TTHMs	0 ppb	80 ppb	2007	25.7 - 73.4 ppb	49 ppb	NO	By-product of drinking water disinfection
HAA	0 ppb	60 ppb	2007	26.0 - 52.3 ppb	36 ppb	NO	By-product of drinking water disinfection

---

Lead and Copper - NTM samples for lead and copper every three years. These results are from the 2005 monitoring program. The State permits monitoring for some contaminants less than once per year because the concentrations of these contaminants do not change frequently. Samples were taken at 20 customer's homes. If the 90th percentile exceeds action level additional requirements would be triggered.

Inorganic Chemical Contaminants Measured at Consumer's Tap	MCLG	Action Level	Highest Level Found	90th Percentile Value	Numbers of Samples Exceeding the Action Level	Violation	Source of Contamination
Lead	0 ppb	15 ppb	16 ppb	3.5 ppb	1	NO	Corrosion of Household Plumbing Systems
Copper	0 ppm	1.3 ppm	0.046 ppm	0.03 ppm	0	NO	Corrosion of Household Plumbing Systems

The 90th percentile is the 18th highest result out of 20 samples taken.

---

Inorganic Chemical Contaminants - These contaminants are metals, salts, and other non-carbon based compounds. All other regulated and unregulated contaminants were not detected in samples.

Inorganic Chemical Contaminants Measured in the Clearwell	MCLG	MCL	Highest Level Found	Sample Date	Violation	Source of Contamination
Barium	2 ppm	2 ppm	0.022	4/9/07	NO	Discharge of Drilling Waste, Discharge from Metal Refineries; Erosion from Natural Deposits
Chromium	100 ppb	100 ppb	1.7	1/15/07	NO	Discharge from Steel and Pulp Mills; Erosion of Natural Deposits
Fluoride	4 ppm	4 ppm	0.23	4/9/07	NO	Erosion of Natural Deposits; Water additive which promotes strong teeth; Discharge from Fertilizer and Aluminum Factories
Nitrate	10 ppm	10 ppm	0.12	1/15/07	NO	Runoff from Fertilizer Use; Leaching from Septic Tanks, sewage; Erosion of Natural Deposits
Sodium	No Standard	No Standard	19	4/9/07	NO	Naturally Present in the Environment
Sulfate	500 ppm	250 ppm (smcl)	23.4	4/9/07	NO	Naturally Present in the Environment
Mercury	2 ppb	2 ppb	0.16	4/9/07	NO	Erosion of natural deposits; Discharge from refineries and factories; Runoff from landfills; Runoff from cropland

ppb - parts per billion or Micrograms per liter - corresponds to one penny in $10,000,000 or one minute in 2,000 years.
ppm - parts per million or Milligrams per liter - corresponds to one penny in $10,000 or one minute in two years.
smcl - secondary maximum contaminant level is a recommended contaminant level and not enforceable.
ND - Not Detected - laboratory analysis indicates that the constituent is not present.
MCL - Maximum Contaminant Level - The "maximum allowed" is 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.
MCLG - Maximum Contaminant Level Goal - The "goal" is the highest level of a contaminant in drinking water, below which there is no known or expected risk to health. MCLG allows for a margin of safety.
Action Level - The concentration of a contaminant which, if exceeded, triggers treatment or other requirements a water system must follow.

Violation: We are required to monitor your drinking water for specific contaminants on a regular basis. Results of regular monitoring are an indicator of whether or not our drinking water meets health standards. During February we did not monitor or test for Total organic carbon and therefore cannot be sure of the quality of our drinking water during that time. Since then all remaining required monitoring has been completed and show that we are meeting drinking water standards. There is nothing you need to do at this time and no alternate water supply need be used.

SURFACE WATER ASSESSMENT REPORT
The Colorado Department of Public Health and Environment has provided the District with a Source Water Assessment Report.  This report is simply an indication of potential future risks associated with the source water supply and is designed to safeguard water resources from contamination.  The results are NOT a reflection of the current quality of the untreated source water, nor are they a reflection of the quality of the treated drinking water that is supplied to District residents.  This report is for source water used by North Table Mountain which is also utilized by Denver and Arvada.  You may obtain a copy of the report by visiting www.cdphe.state.co.us/wq/sw/swaphom.html, or by contacting the office at 303-279-2854.

Potential sources of contamination in our source water area come from: EPA abandoned contaminated sites, EPA hazardous waste generators, EPA chemical inventory/storage sites, permitted wastewater discharge sites,  aboveground, underground and leaking storage tank sites, solid waste sites, existing/abandoned mine sites and other facilities, commercial /industrial /transportation, low intensity residential, urban recreational grasses, quarries/strip mines/gravel pits, row crops, fallow, pasture/hay, forests, septic systems, and road miles.

 

---