2000 Water Quality Report

This report contains important information regarding the water quality in our water system. The source of our water is groundwater. Our groundwater is drawn from the Silurian and Cambrian Jordan Sandstone aquifers. Our water quality testing shows the following results:

Contaminants	MCLG	MCL	Detection Level	Date Sampled	Range of Detection	Violation	Source
Total Coliform	0	Presence of coliform bacteria in >5% of monthly samples	1 sample exceeded	10/11/00		No	Naturally Present in the environment
Alpa Emitters	0	15	5.7	4/12/99		No	Erosion of natural deposits
Combined Radium	0	5	3.4	4/12/99		No	Erosion of natural deposits
Nitrate	10	10	0.33	10/3/00		No	Erosion of natural deposits
Copper	1.3	AL=1.3	1.0, one sample exceeded AL	7/13/00- 9/28/00	ND - 1.5	No	Corrosion of household plumbing systems
Lead	0	AL=15	3	7/13/00- 9/28/00	ND - 13	No	Corrosion of household plumbing systems
DEFINITIONS .Maximum Contaminant Level (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 (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. .ppb --parts per billion. .ppm --parts per million. .pCi/L -picocuries per liter .ND --Not detected .Action Level (AL) -The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. GENERAL INFORMATION 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 water posed a health risk. More information about contaminants or potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline (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 mV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk ftom infections. These people should seek advice about drinking water ftom their health care providers. EP AlCDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available ftom the Safe Drinking Water Hotline (800-426-4791). OTHER INFORMATION The City of North Liberty is currently in the planning stages of a plant expansion. This will include a new Jordan well and Zeolite Softening treatment process. The city is also finishing up a Wellhead Protection Plan to protect your source water. CONTACT INFORMATION For questions regarding this information, please contact Michael Keating at 319/626-5719 during the following hours: 7am -3:30 pm, Decisions regarding the water system are made at the city council meetings held on second and fourth Tuesday of each month at 7 p.m. at city council chambers, 25 West Cherry Street, and are open to the public.