Service Area
Sewer and Water Line Service in Longmont, CO
Sewer line, water line, and underground infrastructure work in Longmont, Boulder County. Denver Sewer and Water scopes the line before quoting, pulls the permits, and handles the excavation with our own crews.
Longmont is at the far edge of our regular service area from southwest Denver, and we schedule visits there with the longer drive time built into the plan.
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Underground Line Work in Longmont
Longmont's older core near Old Town and Main Street dates back to the late 1800s agricultural settlement era, and laterals there tend to be vitrified clay with galvanized or early cast iron water services, laid over a mix of clay soil and old agricultural ditching that can complicate excavation in ways a newer subdivision never presents.
The neighborhoods built from the 1950s through the 1980s ring that historic core, bringing cast iron, early PVC, and Orangeburg in some tracts, with the same deforming Orangeburg failures and joint corrosion familiar across similar-era postwar development elsewhere in the metro. Longmont's history as an agricultural and industrial town also means some older properties have unusual service configurations tied to that former use, and we do not assume a standard residential layout without checking first.
Longmont's rapid growth from the 1990s through the 2010s, particularly east of Main Street and in the newer southeast neighborhoods, brought PVC sewer and copper or PEX water services, and those areas see settlement and construction-related issues rather than the material failures common in the older core.
Because Longmont sits at the north edge of our regular service area, we plan trips there deliberately, but we bring the same scope-first approach used everywhere else. Denver Sewer and Water identifies the material, the era, and the actual defect before recommending a repair, whether that is a historic Old Town clay lateral or a newer PVC line on the city's growing eastern edge.
Areas we cover: Old Town Longmont, Prospect New Town, Southmoor Park area of Longmont, Southeast Longmont growth corridor, Northwest Longmont near the foothills view corridor.
Services Available in Longmont
Sewer Line Repair
Spot repair, lining, and full replacement after a camera tells us what is wrong.
Explore Sewer Line RepairSewer Scope Inspection
Camera and locate work before a purchase, a remodel, or a repair decision.
Explore Sewer Scope InspectionWater Line Services
Pressurized supply work, from a pressure drop at the fixtures to a break under the driveway.
Explore Water Line ServicesTrenchless Solutions
Lining and pipe bursting where the host pipe still holds its shape and grade.
Explore Trenchless SolutionsDrain Cleaning and Jetting
Hydro jetting and mechanical clearing for repeat blockages and grease.
Explore Drain Cleaning and JettingExcavation
Open-cut work, access pits, and restoration handled by our own crews.
Explore ExcavationTap Services
Sewer, water, and fire line taps, including sizing and utility coordination.
Explore Tap ServicesStorm Drains
Storm line repair, replacement, and drainage correction on private property.
Explore Storm DrainsLocal Infrastructure Context
Permits and Authority in Longmont
Longmont operates its own municipal water and wastewater utilities for most of the city, though as with other Boulder County communities, some outlying parcels may be served by a separate district. We confirm the correct authority for a given address before filing any permit.
Right-of-way and street cut permitting within city limits goes through the City of Longmont's public works department, and Old Town streets carry additional restoration considerations given their age and the presence of older utility infrastructure nearby.
- Water and sanitary sewer authority: City of Longmont for most addresses, confirmed per parcel for outlying properties.
- Right-of-way and street cut permitting: City of Longmont public works.
- Old Town streets may carry added restoration requirements due to age and nearby utility congestion.
Tap and Connection Notes
- We confirm the servicing utility for a Longmont address, particularly outlying parcels, before applying for a tap.
- Old Town street cuts require coordination around older utility infrastructure that is sometimes not fully documented on city maps.
- Former agricultural or industrial properties sometimes have non-standard service configurations that we check before assuming a typical residential layout.
- Sewer taps into the city main require inspection before backfill, consistent with standard practice across the city.
Typical Pipe Eras in Longmont
- Late 1800s to early 1900s Old Town: vitrified clay sewer laterals and galvanized or early cast iron water services.
- 1950s through 1980s surrounding neighborhoods: cast iron, early PVC, and Orangeburg in certain tracts.
- 1990s through 2010s eastern and southeastern growth areas: PVC sewer and copper or PEX water services.
How Lines Fail Here
- Root intrusion at clay joints in Old Town's older laterals.
- Orangeburg laterals deforming in mid-century tracts.
- Cast iron corrosion at joints throughout 1950s and 1960s construction.
- Bellies and offset joints from expansive clay soil movement across newer subdivisions.
- Unusual service configurations on former agricultural or industrial properties.
Longmont Sewer and Water Questions
Need a sewer or water line crew in Longmont?
Camera-first diagnosis, permits handled, and honest answers about what the line actually needs.