City of Mission Water System 2017 Water Quality Report (PWS ID: 084690532)

City of Mission Water System


A look at your local water quality: 

In compliance with the 1996 Safe Drinking Water Act Amendments, the City of Mission is providing our water users with this report on the quality of our drinking water. This report presents data compiled during the past twelve months from January 1, 2017 to December 31, 2017.

The City of Mission is pleased to inform the public that the water is “safe” and meets all federal Drinking Water Standards. During this reporting year the water was tested for bacteriological contaminants, nitrate, and other contaminants listed below.. All water samples were analyzed at an USEPA certified laboratory. Reports are on file at the City of Mission Finance Office, USEPA Region 8 office, and contract lab. 

You should know:

Some persons 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 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 risk of infection by Cryptosporidium are available from the Safe Drinking Water Hotline (1-800-426-4791).

Did you know:

Contaminants that may be present in source water include:

• Microbial contaminants, such as viruses and bacteria, which may come from sewage 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 stormwater 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 stormwater runoff, and residential uses.

• Organic chemical contaminants including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, can come from gas stations, urban stormwater runoff, and septic systems.

• Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.

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. FDA regulations establish limits for contaminants in bottled-water that must provide the same protection for public health.

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 RST Water Resources at (605) 747-2559 ext. 262 or the EPA’s Safe Drinking Water Hotline (800) 426-4791.

Our Water Source:

Our water source is the Sicangu Mni Wiconi Water Treatment Plant, which receives its water from the Missouri River.


The Sicangu Mni Wiconi Water is treated with conventional filtrate, chloramine, and fluoride. Chloramine is used as a disinfectant to eliminate coliform bacteria and pathogenic viruses. Fluoride is used to strengthen dental enamel and prevent dental cavities. 

Bacteriological Monitoring:

Bacteriological monitoring is performed monthly to test for the presence of coliform bacteria, fecal coliform, and E.coli. Our system is required to collect two samples per month as defined by the size and population served. 

Chemical Monitoring:

Note to our water users: The USEPA requires us to monitor for certain contaminants or parameters in source waters before systems are initiated. Samples are required once again during a three-year compliance period. Any contaminants over the MCL reported in the initial sampling will have increased sample-monitoring schedules. Systems reporting low to zero levels may be issued a waiver and allowed to take fewer samples during the compliance period.

Lead Monitoring:

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 Mission 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 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

Local water quality contacts:

Questions regarding your local water quality can be directed to the City of Mission Finance Office at (605) 856-4499. Copies of this report will not be mailed to everyone on our system if you would like a copy please stop by the Mission City Office located at 121 S Main Street, Mission SD. Our commitment is to provide quality water on tap to the people of Mission and surrounding areas. 

Published once at the total approximate cost of $303.48

Published: July 4, 2018

PO Box 229, Mission, SD 57555 • 605-856-4469 • This email address is being protected from spambots. You need JavaScript enabled to view it.