Mandan News

2013 Mandan public water quality report

The City of Mandan has generated this report in response to a regulation implemented by the Environmental Protection Agency. The regulation mandates that each community water system in the United States (such as the one the City of Mandan owns and operates) prepare, on an annual basis, a report that provides its customers with information regarding the quality of water distributed to its customers. The following is the Sixteenth report generated for the City of Mandan’s system.

This report summarizes Mandan’s water quality data for the monitoring period ending December 31, 2013. Additionally, this report provides other pertinent information regarding the potential health effects associated with detected contaminants, if any. As a requirement for this report, definitions of terms, specific language, a table of water quality data and other relevant information is included. We hope you will find the information in this and subsequent annual reports useful and informative.

The City of Mandan obtains water from the Missouri River. River water is made safe for drinking at the Mandan Water Treatment Plant. At the plant, river water is pumped to a pretreatment basin where objectionable tastes and odors are treated and suspended sediments are removed. After pretreatment, the water passes through one of two treatment trains in the original 1958 or the 1985 plant addition. Each treatment train consists of softening, clarification, and stabilization, followed by disinfection and filtration. On average, the plant produces approximately 2.67 million gallons per day and has a peek capacity of approximately 12 MGD.

The sources of drinking water (both tap and bottled water) include rivers, lakes, streams, pond, reservoirs, springs and wells. As water travels over the surface of the land or through the ground it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in the source water include:
• Microbial Contaminants, such as viruses and bacteria, which may come from sewerage treatment plants, septic systems, agricultural livestock operations and wildlife.
• Inorganic Contaminants, such as salts and metals, which can be naturally-occurring or result from urban storm water runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming.
• Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm water runoff and residential uses.
• Organic Chemical Contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also, come from gas stations, urban storm water runoff and septic systems.
• Radioactive Contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.

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 poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency’s Safe Drinking Water Hotline (800-426-4791). In order to ensure that tap water is safe to drink, EPA prescribes regulations that limit the amount of certain contaminants in water provided by public water systems. Food and Drug Administration regulations establish limits for contaminants in bottled water which must provide the same protection for public health.

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).

In April of 2008, the City of Mandan began monthly testing of our source water for the presence of cryptosporidium. Two years of source water monitoring for public water systems was required under the Long-Term 2 Enhanced Surface Water Treatment Rule implemented by the EPA in 2003.

Cryptosporidium is a microbial parasite, which is found in surface water throughout the United States. Although filtration removes cryptosporidium, the most commonly used filtration methods cannot guarantee 100 percent removal. Of the 24 samples of source water analyzed, only two samples were found to contain cryptosporidium, with an average analytical result value of 0.161 oocysts per liter.

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. The City of Mandan is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. Use water from the cold tap for drinking and cooking. 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 two minutes before using water for drinking or cooking. If you are concerned with lead in your drinking 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

EPA requires monitoring of over 80 drinking water contaminants. Those contaminants listed in the Table of Detected Contaminants were the only ones detected in your drinking water during the most recent monitoring period. As authorized and approved by the EPA, the State has reduced monitoring requirements for certain contaminants to less often than once per year because the concentrations of these contaminants are not expected to vary significantly from year to year. Consequently, some of our data, though representative, is more than one year old.

North Dakota Source Water Assessment Program has classified Mandan’s water system as moderately susceptible to potential contaminants. It should be noted that historically the city has effectively treated its source water to meet drinking water standards. A copy of the assessment report can be reviewed at the Water Treatment Plant.

Some of the information provided in this report is complex. If you have any questions, concerns, or would like additional information, you can contact Duane Friesz, at (701)-667-3275 between 8 a.m. and 4:30 p.m. Monday through Friday. Those wishing to participate in decisions concerning the quality of our water can be scheduled to appear at City Commission meetings by calling Mr. Friesz at the above number. Regular Commission meetings begin at 5:30 p.m. and are held the 1 and 3 Tuesday of every month at Mandan City Hall, located at 205 Second Avenue Northwest. These meetings are also televised on community access T.V. channel 2.

The City of Mandan would appreciate if large volume customers would post copies of this report in conspicuous locations or distribute them to tenants, residents, patients, students, and/or employees, so individuals who do not receive a water bill can learn about our water. If you are aware of any non-English speaking individuals who need help with the appropriate language translation, please contact us at the number listed above.

Report tables will be uploaded to the Mandan News website for those who wish to explore them.