# Sewer and Water Line Services in Longmont, Colorado 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. ## 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 permit 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 era - 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. ## Common failure modes - 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. ## Areas served - Old Town Longmont - Prospect New Town - Southmoor Park area of Longmont - Southeast Longmont growth corridor - Northwest Longmont near the foothills view corridor ## Response time 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. ## Frequently asked questions **Is Longmont's water system connected to Denver Water?** No. Longmont operates its own municipal water and wastewater utilities, separate from Denver Water. We confirm the servicing authority for outlying parcels before doing permitted work, and we are a private contractor rather than the city utility itself. **Why would an Old Town Longmont property have an unusual sewer or water configuration?** Longmont's history as an agricultural and industrial town means some older properties near the historic core were connected in ways that do not match a standard modern residential layout. We check the actual configuration with a camera and a locate before assuming anything. **Do you travel to Longmont for both emergency and scheduled work?** Yes, though Longmont is at the north edge of our regular service area, so we schedule trips there deliberately rather than treating it the same as our closer southwest Denver coverage. **Does Orangeburg pipe still turn up in Longmont?** Yes, mostly in the neighborhoods built from the 1950s through the early 1970s. It deforms into an oval shape and holds solids, and a camera scope is the reliable way to confirm it rather than guessing from the house's age alone. **Are newer Longmont neighborhoods less likely to need sewer repairs?** They see fewer material failures, since most of the pipe is PVC and copper, but settlement over expansive clay soil still causes bellies and offset joints in newer construction, so a newer neighborhood is not immune to problems, just different ones. ## Nearby service areas - [Lafayette](https://www.denversewerandwater.com/locations/lafayette-co) - [Erie](https://www.denversewerandwater.com/locations/erie-co) - [Frederick](https://www.denversewerandwater.com/locations/frederick-co) - [Niwot](https://www.denversewerandwater.com/locations/niwot-co) - [Boulder](https://www.denversewerandwater.com/locations/boulder-co) --- Denver Sewer and Water is a privately owned, licensed and insured plumbing contractor. We are not affiliated with, endorsed by, or connected to Denver Water, the municipal water utility, or any government entity. To pay a municipal water bill or reach the public utility, visit denverwater.org. Source: https://www.denversewerandwater.com/locations/longmont-co