There are a few options to submit backflow reports:
Fax to (303) 651-8702
Scan and email to backflow@LongmontColorado.gov
Drop off or mail to: Public Works and Natural Resources Operations, 375 Airport Road, Longmont, CO 80503.
Hours of drop off are Monday – Friday, 8 am – 4 pm
If you need additional help or have any questions, please contact Water Utilities.
How does the City track backflow device inspections?
Water Utilities currently uses a database system to track backflow device installation and test results.
How much does a backflow device test cost?
A survey of certified inspectors was done, and the average cost was $50 to $100.
Who mandated the backflow prevention program? If the state requires this, why don't we follow their program?
The Safe Drinking Water Act and the State of Colorado mandate that water suppliers develop and maintain a Backflow Prevention and Cross-Connection Control program. Neither entities have developed specific programs, but the State has outlined requirements for the program.
Who owns the backflow device?
Property owners own the backflow devices on their property.
Water and Sewer Services
Are there any natural lakes in Longmont?
Union Reservoir was constructed “on top of" a natural lake called Calkins Lake. The lake was named for or by Longmont’s first engineer, Benjamin Calkins. It was a natural depression that was presumably deepened and enlarged over time by bison herds that used the natural low spot for watering and wallowing in.
Other notable reservoirs constructed on top of natural lakes are found at McIntosh Lake, Burch Lake and McCall Lake. McCall Lake Reservoir was actually constructed over the top of two natural lakes, making the single reservoir.
Do I Need Water Line Insurance?
Property owners are responsible for the maintenance of the water service line from their property line to their house foundation. It is rare that these lines fail. Residents may, however, be approached by private companies offering insurance plans on water service lines entering their homes. Such companies are not associated with the City, and the need for insurance is at the discretion of the owner. If you have questions, please contact Water Utilities .
Does Longmont add Fluoride to the drinking water?
Fluoridation of Longmont’s water supply was approved in 1958 and continues today. It is a safe and approved practice, and the City uses fluoride products that meet industry standards for drinking water treatment additives. Longmont and other water utilities in Colorado take guidance on treatment matters related to Fluoride from the agency that regulates potable water treatment –Colorado Department of Public Health and Environment (CDPHE). Water utilities across the U.S. and state regulatory agencies such as CDPHE are advised by US Environmental Protection Agency and Centers for Disease Control) on the use of Fluoride in potable water treatment.
Every drop counts, use only what you need. The City of Longmont offers many tips, programs and rebates for water saving efforts. Learn more on our Water Conservation webpage .
How do I acquire information on the City of Longmont’s water quality?
The City publishes an annual Water Quality Report, which provides information about Longmont's drinking water and the results of the thousands of tests performed on the water during the year. View the latest report on our Drinking Water webpage.
How do treatment plants protect our water?
A wastewater treatment plant:
1. Removes Solids – This includes everything from rags and sticks to sand and smaller particles found in wastewater.
2. Reduces Organic Matter and Pollutants – Helpful bacteria and other microorganisms are used to consume organic matter in wastewater. The bacteria and microorganisms are then separated from the water.
In order to ensure that your tap water is safe to drink, the Environmental Protection Agency prescribes regulations which limit the amount of certain contaminants in water provided by Longmont and other public water systems. The City's water treatment plants reduce any contaminants in the source waters to levels that meet, and usually surpass, all Federal and State requirements.
What are my Water and Sewer Services Rates and Fees?
Longmont charges users of the City's water and sewer systems rates and fees which are determined by the type of user. These rates and fees pay for the facilities and personnel that provide water and wastewater services to residents. To learn more please visit out Rates and Fees webpage.
What are the raw water sources?
The St. Vrain Watershed and the Colorado-Big Thompson Project. Learn more on our Water Supply webpage.
What is the capacity of the City’s drinking water treatment plants?
The City of Longmont operates two Conventional Filtration Surface Water Treatment Plants (WTP): The Nelson-Flanders WTP, which is rated to produce 40 million gallons per day, and the Wade Gaddis WTP, a peaking plant, rated to produce 14.75 MGD.
What is the capacity of the City’s wastewater treatment plant?
The City of Longmont operates an Activated Sludge Wastewater Treatment Facility rated at 14 million gallons per day (MGD) average day annual flow.
What steps can I take to help in water treatment?
Dispose of household products safely. Don't pour solvents, pesticides, paint thinners, engine oil, or household cleaning products with hazardous chemicals down the drain or into a storm sewer. Take them to a recycling center or hazardous waste collection site.
When are the highest water demands?
Summer presents the highest demands for the treated water supply. Demand from outdoor sprinkler systems and other seasonal use requires the water treatment plant to produce upwards of 30 million gallons per day. When irrigation is not in use, the typical plant production needed is around 7 to 8 million gallons per day.
Where can I get more information on the use of rain barrels?
The City of Longmont does not administer or regulate rain barrels. That is accomplished at the state level by the State Engineers Office. A great resource is their website, which explains the entire process.
Where do I get a permit to fish at Button Rock Preserve/Ralph Price Reservoir?
Button Rock Preserve and Ralph Price Reservoir are owned and maintained by the City of Longmont. Each year a limited number of permits are issued for fishing at Ralph Price Reservoir. For more information, please visit the Ralph Price Reservoir Fishing Program webpage.
Where do the odors come from at the wastewater treatment plant?
Odor can come from the influent wastewater or from different treatment processes at the wastewater treatment plant. To combat the odors, tanks and other structures are covered which allows the air inside of them to be collected so it can be treated for odor before releasing it to the atmosphere. To report odor complaints, please contact the Wastewater Treatment Plant.
Where Does Our Water Come From?
Longmont's water originates high in the Rocky Mountains primarily as snow. As the snow melts, it runs down the St. Vrain Creek and is either stored in Ralph Price Reservoir for later use, or diverted into pipelines below Longmont Dam for immediate delivery to the water treatment plants. Additional water originates on the Western Slope from the Colorado River and is delivered via the Colorado-Big Thompson Project (C-BT) - through the Alva B. Adams tunnel, through Lake Estes and Carter Lake, then down the St. Vrain Supply Canal into Longmont's water treatment plants. After water is treated at the water plants, it is delivered through transmission pipelines and treated water storage tanks to distribution pipelines. These pipelines are located under city streets and alleys and connect to service lines that provide water to homes and businesses. For more detailed information, please visit our Water Supply webpage.
Where does wastewater come from?
1. Homes – human and household wastes from toilets, sinks, baths, and drains.
2. Industry, Schools, and Businesses – chemicals and other wastes from factories, food-service operations, airports, shopping centers, etc.
On average, each person in the U.S. contributes 50-100 gallons of wastewater daily.
Who do I call if I have no water or low water pressure?
If you do not have water or are experiencing very low pressure at your residence or business during the hours of 8 am - 5 pm, Monday through Friday, please contact Water Utilities. After hours, please call Longmont Public Safety Dispatch.
Who do I call if I have sewage backing up in my house?
If you are experiencing sluggish drains or a sewer backup in your house or business, there could be a blockage in your service line or in the main sewer line. The City can check this to determine where the problem may be occurring and what action needs to be taken. Contact Water Utilities Monday through Friday, 8 am – 5 pm. After hours call, please call Longmont Police Dispatch, and they will notify a utility technician to respond to your call.
Learn more about sewer lines, who is responsible, and how you can prevent problems on our Sewer Lines webpage.
Who do I contact if I want to buy/sell water rights?
Water Rights for Longmont are acquired primarily through implementation of the Raw Water Requirement Policy. This policy can be found at section 14.05 of the Longmont municipal code. For additional detailed information please contact the Water Resources Division.
Who do I contact if my water meter is malfunctioning?
If you are experiencing problems with your water meter, please contact Water Utilities Monday through Friday, 8 am - 5 pm. For after hours emergencies involving a meter, please call Longmont Public Safety Dispatch.
Who do I notify if I see water running down the street?
Water and sanitary sewer service is provided within the existing City limits. The City also plans to provide future water and sanitary sewer service to the Municipal Service Area and the Longmont Planning Area. For more information regarding the City's specific service areas, contact water utilities. There are three additional service providers in the area. Left Hand Water District generally provides water service to areas southwest, south and southeast of the City's service area. Longs Peak Water District generally provides water service to areas northwest, north and northeast of the City's service area. St. Vrain Sanitation District generally provides sanitary sewer service to areas east of the City's service area.
Why does my water smell like Chlorine?
Chlorination is a necessary step in the treatment of potable water. Chlorine is applied to the filtered water at the water treatment plant to kill disease-causing pathogens, such as bacteria, viruses, and protozoans. At certain times of the year water conditions may cause chlorine odors to be more prevalent.
Drinking water in your home or business may occasionally become discolored or cloudy because of changes in flow disturbing the sediment in the water pipes. These problems are often caused by water main breaks, fire hydrant use, or installation of new water lines. Even though the water may not look clear, it is safe to drink. In many cases, running the cold water tap for a few minutes will remove the discoloration from the water. If you have tried this and the problem persists, please contact water utilities between 8 am and 5 pm, Monday through Friday. After hours or on weekends you can call Longmont Police Dispatch. In addition to discolored water, you may notice seasonal changes in the taste or odor of the water. If you have concerns or questions about this, please call the Water Quality Lab.
Water Main Line Flushing
How do I know when my area will be flushed?
Each year, an ad is placed in the Longmont Times-Call newspaper the Sunday before flushing begins. Information is also published in City Line, the monthly newsletter included with all City of Longmont utility bills, on our Longmont social media accounts, and to the Flushing webpage. All sources indicate by map the date(s) that we will be flushing the water supply system that services your home. It’s always possible that these dates can change if we run into any unanticipated problems during the program. We strive to stick with our published schedule.
How does flushing improve water quality?
The City of Longmont water distribution system is a complex network of pipes and storage reservoirs where sediment or deposits may naturally accumulate over time. The flushing program removes sediment and ensures that the distribution system is operating correctly.
How much water is used to ﬂush mains?
The amount of water used to flush a particular section of pipe depends on a lot of factors, such as water main size and system pressure. A typical residential fire hydrant can flow on average between 1500 – 2000 gallons per minute. Flushing uses on average .005% (1/2 of 1%) of the drinking water that the City of Longmont uses on a yearly basis.
What should I do if I use water while my water line is being flushed?
If the cold water is clear, then the water is okay. If you encounter discolored water, shut the water off and wait several minutes. After waiting, check the clarity by running cold water for a few minutes allowing new water to work its way into your pipes. If not, wait a few more minutes and check again. This discoloration only affects the appearance of the water; it does not affect the taste or water quality.
When does flushing normally occur?
Normally, flushing takes place for approximately a 3-week period during early spring. You can see when crews will be in your neighborhood by visiting the Water Line Flushing webpage. Water crews only flush lines Monday- Friday between the hours of 7:00 a.m. - 4:00 p.m.
Where does the water go?
The City of Longmont has a network of storm drainage pipes, ditches, and drainage basins that directs water to various detention ponds, creeks, ponds, and rivers. The water utilized during the flushing program also uses these pipelines and drainage ways. This allows water to get re-used in various ways, whether it goes to a local farmer through an irrigation ditch or into a river for re-use downstream. Local lakes like McIntosh Lake and Union Reservoir can be fed in some ways by these networks of pipes. Additionally, the City of Longmont accounts for this type of water usage through the Water Resources Division.
Why does the City of Longmont flush water mains?
Flushing helps maintain water quality. The water entering distribution mains is of very high quality; however, water can deteriorate in distribution mains if the mains are not properly managed and unidirectional flushing is a technique for managing a water distribution system.
Why should I only use cold water when the crews are in my area?
The water system feeds both your cold and hot water system in a typical home. If you happen to use hot water during flushing, it may be necessary to drain your hot water tank. If this happens, stop using water immediately, and wait until crews are out of the area to continue hot water use.
Will I lose water service during the flushing program?
We strive to maintain water service for customers during the program; however, unforeseen conditions can occur that require water to be shut off for a short period. If you lose water service while the flushing operation is occurring in your area, it is a good idea to contact Water Utilities. Your report will allow our field technicians to investigate if the water loss you’re experiencing is a known issue or an unknown issue.