City of Walker
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This report contains important information regarding the water quality in our water system. The source of our water is groundwater.   Our water quality testing shows the following results:

CONTAMINANT                   MCL - (MCLG)              Compliance                           Date                         Violation                Source

                                                                        Type     Value & (Range)                                               Yes/No                   

Lead (ppb)                          AL=15   (0)               90th      8.00 (ND - 27)              2016                               No                   Corrosion of household plumbing 

                                                                                   1 sample (s)                                                                               systems; erosion of natural deposits

                                                                                    exceeded AL

Copper (ppm)                    AL=1.3 (1.3)               90th      0.11 (0.02 - 0.2)            2016                              No                     Corrision of household plumbing 

                                                                                                                                                                                      systems; Erosion of natural deposits;

                                                                                                                                                                                      Leaching from wood preservatives


Chlorine (ppm)                  MRDL-4.0                   RAA      1.64 (1.47 - 1.81)         12/31/2017                   No                       Water additive used to control microbes



Sodium (ppm)                      N/A (N/A)                SGL              11                          12/8/2017                   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.


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

RAA – Running Annual Average

Treatment Technique (TT) – A required process intended to reduce the level of a contaminant in drinking water.

Action Level (AL) – The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.

Maximum Residual Disinfectant Level Goal (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.

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.

SGL – Single Sample Result

RTCR – Revised Total Coliform Rule

NTU – Nephelometric Turbidity Units


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 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).

If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children.  Lead in drinking water is primarily from materials and components associated with service lines and home plumbing.  WALKER WATER WORKS is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components.  When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for drinking or cooking.  If you are concerned about lead in your water, you may wish to have your water tested.  Information on lead in drinking water, testing methods and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline or at


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 (800-426-4791).


In July 2017 we failed to monitor for Coliform Bacteria. Adverse health effects, if any, are not known. Monitoring procedures have been corrected to avoid future violations.


This water supply obtains its water from the dolomite and limestone of the Silurian, Cambrian-Ordovician aquifer.  The Silurian, Cambrian-Ordovician aquifer was determined to be susceptible to contamination because the characteristics of the aquifer and overlying materials provide some protection from contaminants from the land surface.  The Silurian, Cambrian-Ordovician well will be susceptible to surface contaminants such as leaking underground storage tanks, contaminant spills, and excess fertilizer application.  A detailed evaluation of your source water was completed by the Iowa Department of Natural Resources, and is available from the Water Operator at 319-310-6685   .

For questions regarding this information or how you can get involved in decisions regarding the water system, please contact WALKER WATER WORKS at 319-310-6685.







Whenever a snow emergency is declared, parking on the City streets shall be permitted      

on the even sides of the street when the snow emergency is declared to start on an even

numbered day, and on odd numbered sides of the street, when the snow emergency is

declared to start on an odd numbered day.  This shall continue from proclamation through

the duration of the snow or ice storm and a 48-hour period after cessation of the storm. 

While under said snow emergency parking shall adhere to even sides of the street on

even numbered days and odd sides of the street on odd numbered days, unless the snow

has been removed or plowed from said street, alley or parking area.  Vehicles violating

this snow emergency section shall be ticketed and towed at the owner’s expense.

In December of 2014, the city received a grant from the Linn County Fund through the Greater Cedar Rapids Community Foundation for this book drop box for the Center Point Library.  Books are returned to the library weekly.

Effective March 9, 2016:

Burn barrels are NO LONGER allowed.