Municipal Department
City of Longmont Water Utilities and Utility Billing
Serving Longmont and the City water service area
Population served
Approximately 100,000 residents in Longmont; the City’s 2025 Census estimate is 100,109, and its capital planning materials describe AMI monitoring for approximately 30,000 water customers. The city provides water and sanitary sewer inside the existing city limits and has additional agreements and planning-area relationships outside the city boundary.
State system code
FIPS 08
Billing frequency
Monthly; utility bills are mailed approximately every 30 days, and the exact due date is printed on each bill.
Provider briefing
How this utility’s billing works
City of Longmont Water Utilities and Utility Billing operates as a municipal department serving Longmont and the City water service area. Customers should use the provider’s current account-specific bill and official customer-service instructions as the final authority for deadlines, balances, and service requests.
The published water-rate framework is described as Increasing block tiers with a fixed monthly meter charge. For a 5/8-inch meter inside city limits in 2026, the base charge is $11.91 per month, followed by $4.84 per 1,000 gallons for the first 5,000 gallons, $7.27 per 1,000 gallons for 5,001–15,000 gallons, $9.69 per 1,000 gallons for 15,001–35,000 gallons, and $13.08 per 1,000 gallons above 35,000 gallons. Outside-city rates are separately published at higher block prices. The schedule is effective January 1, 2026 through the next adopted change.. Bills are generated monthly; utility bills are mailed approximately every 30 days, and the exact due date is printed on each bill., and a typical residential cost reference is Using the published 2026 inside-city 5/8-inch water charge, water alone is approximately $36.11 at 5,000 gallons and $50.65 at 7,000 gallons. Adding the currently posted wastewater charge of $11.50 plus $7.82 per 1,000 gallons, and the residential storm-drainage charge of $18.85, produces an indicative combined bill of about $105.56 at 5,000 gallons or $135.74 at 7,000 gallons before sanitation, taxes, fees, or other services. The city labels the wastewater rates currently posted as effective January 1, 2025 until changed, so this is a planning estimate rather than a guaranteed 2026 total.. These descriptions are useful planning benchmarks; actual charges can change with meter size, usage, sewer averaging, local taxes, drought stages, or account-specific fees.
Wastewater and sewer calculation
The currently posted metered wastewater schedule lists a monthly base charge of $11.50 plus $7.82 per 1,000 gallons. An unmetered residential account is listed at a $51.67 monthly base. The reviewed rate page does not publish a separate residential winter-average formula for Longmont; the customer’s metered utility bill carries the posted wastewater charge, while the city’s current page identifies these wastewater values as continuing from January 1, 2025 until changed. Customers should confirm the applicable sewer class and any account-specific allocation with Utility Billing.
Meter and infrastructure notes
Longmont reports that more than 75,000 electric and water meters are read through automated meter infrastructure each month, without a routine property visit; capital-planning materials describe AMI monitoring for approximately 30,000 water customers, with device replacement on a roughly 10-year life cycle. The city’s sustainability indicator reports that about 99% of water meters are radio-read through AMR. The system supports continuous-flow detection, but the city says customer-facing notifications are manually sent after a minimum of 14 days rather than promising an automatic real-time customer alert. Water meters are also maintained and replaced on a scheduled annual program.
Emergency water support
Report a leak or water emergency
For water-wastewater emergencies after hours, including suspected main breaks, flooding, no water, very low pressure, or sewer backup, call Longmont Public Safety Dispatch at (303) 651-8501. During business hours, Water Utilities uses (303) 651-8416, generally 8:00 a.m.–5:00 p.m. Monday–Friday; the city’s phone directory also lists (303) 651-8468 for business-hours water-wastewater operations.
Official starting point
Choose the right next step
Reading this profile
A practical reference for Longmont and the City water service area
City of Longmont Water Utilities and Utility Billing is listed here as a municipal department. The profile separates account actions—such as paying a bill or requesting service—from explanatory material about rates, meters, wastewater, leaks, and delinquency.
Because utility rules can vary by account class, meter size, service address, billing date, and local ordinance, treat the published bill and current provider website as the final authority. Use this profile to locate the correct channel and prepare better questions for customer service.
If your issue is urgent, start with the provider’s emergency number or official payment route rather than waiting for an email response. Keep a written record of calls, confirmation numbers, notice dates, and documents you submit.