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Home>City>Water
Department>2004 Water Quality Report
2004 WATER
QUALITY REPORT
FOR
NORTH LIBERTY WATER DEPARTMENT
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:
|
CONTAMINANT |
MCLG |
MCL |
DETECTED LEVEL |
DATE SAMPLED |
RANGE OF DETECTION |
VIOLATION |
SOURCE |
|
Copper (ppm) |
1.3 |
AL=1.3 |
1.0 |
7/03 |
0.11-1.3
|
No |
Corrosion of household
plumbing systems; Erosion of natural deposits |
|
Lead (ppb) |
0 |
AL=15 |
2 |
7/03 |
ND-3 |
No |
Corrosion of household
plumbing systems; erosion of natural deposits |
|
Nitrate [as N] (ppm) |
10 |
10 |
1.4 |
10/13/03 |
|
No |
Runoff from fertilizer use;
Leaching from septic tanks, sewage; Erosion of natural deposits |
|
Combined radium (pCi/L) |
0 |
5 |
2 |
4/2/03 |
|
No |
Erosion of natural deposits |
|
Alpha emitters (pCi/L) |
0 |
15 |
4.5 |
4/2/03 |
|
No |
Erosion of natural deposits |
|
Sodium (ppm) |
N/A |
N/A |
290 |
|
|
No |
Erosion of natural
deposits; Added to water during treatment process |
Note: Contaminants with
dates indicate results from the most recent testing done in accordance with
regulations.
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
N/A Not applicable
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 Agencys 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 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
microbial contaminants are available from the Safe Drinking Water Hotline
(800-426-4791).
SOURCE WATER ASSESSMENT INFORMATION
The North Liberty water supply obtains its water from the Silurian and Cambrian
Jordan Sandstone aquifers. The Silurian and Cambrian Jordan Sandston aquifer
were determined to be not susceptible to contamination because the
characteristics of the aquifer and overlying materials prevent easy access of
contaminants to the aquifer. The wells will not be susceptible to most
contaminant sources except through pathways to the aquifer such as abandoned or
poorly maintained wells. A detailed evaluation of your source water was
completed by the IDNR, and is available from the North Liberty Water Department
at 319/626-5719.
CONTACT INFORMATION
For questions regarding this information, please contact the North Liberty Water
Department at 319/626-5719 during the following hours: 7:00 am 3:30 pm.
Decisions regarding the water system are made at the city council meetings held
on the second Tuesday at 7 p.m. at 25 W. Cherry Street and are open to the
public.
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