10-30-19 – The State of Nebraska is requiring us to send a letter to all of customers about Iron and Manganese. This letter will be enclosed with this month’s bill and will also be posted on this website and our Facebook page. As always if you have any questions please give us a call.
The following public notice is intended to provide information and recommendations
for the customers of the Lancaster Co. Rural Water District #1 regarding recent testing
of drinking water samples for manganese.
Water samples were collected by Lancaster Co. Rural Water District #1 from its wells in September of 2019.
Samples were analyzed for manganese, and levels of 278 to 546 micrograms of manganese per liter of water were
Manganese is a naturally occurring mineral found in soil, rock, food, and water. It is an essential nutrient required
for many body functions, from the digestion and metabolism of nutrients to supporting bone health. The typical
U.S. diet contains between 2,000-7,000 milligrams of manganese per day and the Food and Drug Administration
recommends 2,000 milligrams of manganese per day for those 4 years of age and older. Manganese is commonly
found in drinking water sources at levels around 50 micrograms per liter, however, levels above this can have an
off taste, color, or odor, and cause staining in sinks or on laundry.
Although manganese is naturally occurring and an essential nutrient at low levels, exposure to high levels may be
associated with adverse central nervous system effects, particularly for formula-fed infants. Infants not only have
a developing nervous system but higher absorption (40% compared to 3% in older children and adults) and lower
excretion of manganese than older children or adults do, so they are more sensitive to the effects of high levels of
Manganese is not regulated under the Safe Drinking Water Act but the U.S. Environmental Protection Agency
does have a lifetime health advisory for manganese of 300 micrograms per liter. This level is considered to be
protective of even the most vulnerable in the population, formula-fed infants. Drinking water with levels greater
than 300 micrograms per liter, however, should not be used for preparing formula for infants. Filtered or
bottled water should be used.
• Lancaster Rural Water is in the process of working with the Engineering Firm JEO and the USDA Rural
Development of Nebraska to discuss future options to help keep the drinking water at safe Iron and
Manganese levels. A pilot study is being conducted on the possible location and effectiveness of a Water
Treatment Plant if that option is available. Customers within the Rural Water District will be notified by
mail of any updates or changes that take place. You may also visit our website at http://www.lrwdl.com and/or
our Facebook page at Lancaster Rural Water District for additional information and updates. Please call
the District Office with any questions at 402-782-3495, Monday through Friday, 7:30a.m. – 4:00p.m.
If you are interested in more information about iron and manganese testing levels, please read additional
information from JEO Consulting Group:
In 1987, the U.S. Environmental Protection Agency (EPA) established a secondary maximum contaminant level
(SMCL) for manganese of 0.05 milligrams/liter (mg/L). An SMCL is an unregulated standard for public water
systems that communities can use to help manage their drinking water for aesthetic consideration. In 2004, the
EPA issued a health advisory to guide communities which may have drinking water with high manganese levels.
Recent data indicates that exposure to elevated levels of manganese in drinking water may result in adverse
health effects. As such, the EPA is currently working to determine if manganese should be regulated as a primary
contaminant and working with state agencies to sample for manganese. Unlike other contaminants like nitrate,
manganese in drinking water comes from minerals in the soil where the water is sourced, keeping the manganese
levels fairly consistent over time. However, with the changing regulation and sampling programs implemented by
the state, communities need to know their manganese levels and the implications for their water systems.
Communities with manganese near advisory levels in their public water supply should connect with their local
regulatory contact and their consulting engineer to determine a plan of action.
Iron and Manganese Testing and Treatment
Iron (Fe) and manganese (Mn) are typically present in drinking water in 3 basic forms, and knowing the
forms and concentrations of iron and manganese helps in the selection of the appropriate treatment.
• Dissolved (soluble) – very small minerals in water that pass through a 0.2 micrometer lab
filter. If the water sample is clear at first but contains red or black particles after sitting in a
glass for 24 hours, dissolved (soluble) iron or manganese is present.
• Colloidal – small particles that are suspended in water and that are difficult to filter out. If the
water has a red or black tint but particles cannot be seen and do not settle out after 24-
hours, colloidal form is likely to be present.
• Particulates – larger insoluble mineral particles that precipitate out of water (you can see
them). Particulates are visible in the glass, either before or after the water sits.
In a water distribution system, it may be possible that soluble and insoluble forms are found together.
Water with soluble iron and manganese may contain insoluble forms that sloughs off the water pipes.
Therefore, it is beneficial to test for both total and dissolved forms. The appropriate treatment
technologies will depend upon the concentrations of iron and manganese, overall water quality (e.g.,
pH, temperature, etc.) and whether the iron and manganese are dissolved, colloidal, or particulate:
1. If the water is highly colored and cloudy, it is probably the iron and manganese particulates that
sloughs off the water pipes. A good point of entry bag filter or cartridge filter should successfully
remove the particulates.
2. If there are both visible particulates and dissolved iron and manganese, the water should first
be filtered and then treated with an oxidation-filtration process or an absorption process with
ion exchange (a water softener).
3. For dissolved iron and manganese, an ion exchange softener should help to remove it.
Effectiveness may be limited to a few ppm (parts per million) of dissolved iron and manganese
however, so you may have to work with the vendor to optimize the softener for iron and
manganese removal. Another option is the use of a combination sediment filter followed by a
polyphosphate cartridge. Using polyphosphate does not remove the dissolved iron and
manganese but it prevents it from precipitating out of solution and it is typically suitable only for
lower concentrations. Our design standards don’t recommend polyphosphates for Fe/Mn
concentrations greater than 1 ppm.
4. For dissolved/colloidal iron and manganese an oxidation-filtration process is probably the best
bet. Filter media in this type treatment include birm, greensand, manganese dioxide and other
catalytic filter media. Commercial brands may include Fleck, Filox, Clack MTM and others. An
ion exchange softener may not be very effective because the very small colloids can affect the
performance of ion exchange resins.
If possible, select a treatment unit certified by NSF, Underwriter’s Laboratory (UL), or Water Quality
Association (WQA) to remove the contaminant(s) you are concerned with. These organizations do not
certify treatment units for all contaminants. If a certification is not available for iron and manganese,
you may want to consult a drinking water treatment professional.
7-20-19 – Remember to follow the odd/even day watering schedule. Odd addresses are Tuseday, Thursday and Saturdays and even addresses are Wednesday, Friday, and Sundays. Mondays are the day no one is to water so the system can recover. Please abide and follow this schedule.
6-5-19 – Here is another good article from UNL about being water wise in your landscaping. Here is the link to Being Water Wise in the Landscaping.
5-3-19 – Here is a good article from the Institute of Agriculture and Natural Resources at the University of Nebraska about iron and manganese in water.
4/29/2019- Some customers in Area 4 are experiencing some discolored water. We are flushing throughout that part of the distribution system to help clear that up. Please give us a call at 402-782-3495 with any further questions. Thank you!
4/22/19- Due to a water main that was hit, customers with account number starting with 2 or 3 may experience discolored water as we continue to flush. Please contact the office at 402-782-3495 if you have any further questions.
Please check out our Facebook or Webpage for updates.
Thank you for your understanding!
3-29-19 – The water main at 70th & Yankee Hill Rd has been repaired and the water has been turned on as of 12:00. We are currently flushing mains at different locations. If discolored water continues to persists please give us a call. Thank you for your patience.
3-29-19 – Due to a leak at 70th and Yankee Hill Rd customers in the area water will be shut off while this is being worked on. We will try to put this back in service as soon as possible. Thank-you for your patience.
3-8-19 – Please note that the regular Board meeting for March 13th has been moved to March 20th at 7:00 PM at the District’s office.
3-8-19 – Due to a leak on a 10″ main customers may see some discolored water. The area’s in the District that could be affected are those with account numbers starting with a 2 or 3. If you experience some discoloration call the office and let us know and then we can flush some mains to get this cleared up as soon as possible.
1-29-19 – The Water District is getting a new phone system installed today so if you have a question, feel free to call the District Manager Jordon Bang on his cell at 402-720-6379. For emergencies please call any of the other cell numbers. Sorry for any inconvenience.
12-21-18 – Due to the recent chlorination of the Water System we are seeing some continuing discoloring of the water. The area affected the worse is Area 4, this area is anyone with the account number starting with a 4. If you are experiencing this, please know that we are currently flushing mains and will be through the weekend and Christmas Holidays if needed. Even when the water in the mains are clear up, please note that you may still need to flush your private lines as needed to clean. Feel free to contact any of us if you have questions or concerns.
12-12-18 – Lancaster Rural Water Office has received proper notification from the Nebraska Department of Health and Human Services that we can now STOP the mandatory chlorination process we have been following for the past 5 weeks.
Customers may still notice some chlorine residual even after the pumps are shut off. Please call the office if you have noticed some discoloration of water due to this process as we can flush the mains to help clear this up.
All of us at the Rural Water District would like to thank you for your patience and understanding during this time. Please follow our Facebook Account and/or Website at http://www.lrwd1.com for future updates.
11-29-18 – The Water District is continuing the chlorination of the mains. This will continue through the week of December 15th. Customers may still notice some residual even after the pumps are shut off. Please call the office if you have noticed some discoloration of water due to this process as we can flush the mains to help clear this up. Thank – you.
10-30-18 – **LANCASTER RURAL WATER CUSTOMERS**
Lancaster Rural Water is being required by the Nebraska Department of
Health and Human Services to chlorinate the water in our system because of the presence of coliform bacteria.
Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentially harmful, waterborne pathogens may be present. Coliforms by themselves do not cause disease.
Chlorination of the water will begin on Monday, November 5, 2018 and will continue for at least 30 calendar days to ensure complete disinfection of the system.
When a system that does not routinely chlorinate adds chlorine to disinfect the water, several things can occur:
• Water can become discolored because of high levels of iron and manganese in the system.
• An odor of chlorine may be present.
If the water is cloudy or discolored, it should not be used for drinking
purposes. Also, discolored water may cause staining of laundry. Water may be consumed after the line has been flushed and the water has
cleared. If you have specific health concerns, please contact your health care provider.
Please check our Facebook page at Lancaster Rural Water District, our website at lrwd1 .com, or call us at the office at 402-782-3495 with any questions or concerns.
9-13-18 – Due to a main repair in the 120th & Old Cheney Rd area the water my be discolored. We are currently flushing mains to clean this up. Thanks for your patience.
7-12-18 – During the District Board meeting on July 11th the Board is allowing permits to water newly installed sod for a period of 2 weeks. After the 2 weeks you will then again be required to follow the current watering schedule as outlined in the by-laws. This permit will cost $50.00 and you will be given a permit that will need to be posted. If you need one or have any questions please call the office. 2018 will be the only year these permits will be handed out.
7-11-18 – Remember to send your e-mail addresses into the Water District if you have not done so yet. It is also a good thing to make sure we have your most current phone numbers in your file also.
6-22-18 – The Water District is continuing to flush the mains. If you have any questions, please give us a call. Thank you.
6-25-18 – During the June 20th District Board meeting, the District board adopted new water restrictions beginning April 1st and ending October 31st of every year. Please click on the link to read the new By-law that was adopted.
6-22-18 – The Water District is continuing to flush the mains. If you have any questions, please give us a call. Thank you.