Contact
(303) 651-8468
Hours of Operation
Monday – Friday, 8 am to 5 pm
Location
Civic Center
350 Kimbark St.
Longmont, CO 80501
Drinking Water
Longmont’s drinking water is safe for you to use and the water treatment and delivery system is sound, ensuring you have a continuous and uninterrupted supply of drinking water every day.
Water Conservation
Sustainable Water use in Longmont is as important as ever. Learn the importance of conserving water and programs to offer rebates and discounts to help you continue in that goal.
Water Resources & Supply
Learn where all of Longmont’s drinking water comes from, how they arrive here and the processes they take in their journey to your home.
Rates and Fees – Water, Storm, Sewer
Check out the City's rates and fees schedule for all of the different water utilities and how your utility bill will be impacted.
Sewer Lines
Learn about your sewer service line, your responsibilities and how to prevent and report any problems.
Wastewater Treatment
Learn about the six major types of treatment processes at the Wastewater Treatment plant and how these processes are integrated to treat wastewater so that our community can thrive without creating negative impacts to the St. Vrain River.
Flood Information
Check if your home is in the mapped floodplain, your flood insurance requirements and options, and how to prepare in case of a flood.
Stormwater Quality & Drainage
Learn how the City rehabilitates and improves existing stormwater facilities and helps to protect the rivers, lakes and streams that flow through our community.
2023 Water Quality Report
The annual Water Quality Report provides detailed information about Longmont's drinking water and the rigorous testing and monitoring practices we follow to ensure the highest water quality standards for all residents.
Flood Awareness Brochure
If your Land is in the 100-Year Floodplain, you and your property are at risk. Find more information here about determining your flood risk, protecting your property and changing requirements for flood insurance.
Ten Years After the Flood
A Story of Recovery and Resilience
![](https://longmontcolorado.gov/wp-content/uploads/2024/08/Parks-and-Natural-Resources.jpg)
Report a Problem
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Suspected water main break
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Flooding
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Very low water pressure
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No water service
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Sewer backup in home/business
Stormwater Quality Program
Phone: (303) 651-8416
Water Conservation
Phone: (303) 774-4524
Water Quality Lab
Phone: (303) 651-8416
Water Resources
Phone: (303) 651-8416
Water Utilities
Phone: (303) 651-8416