Larimer County, Colorado: septic system inspection at sale
Checked on November 9, 2026 against the official rule. Rule set by Larimer County Department of Health and Environment.
General information, not legal advice. This is our summary of the official rule as we read it. The ordinance or code and the health department decide: confirm with them before you list, sign or close.
The rule
| Question | What the official text says |
|---|---|
| What is required | Inspection by NAWT-certified third-party inspector; report to LCDHE; Acceptance Document before closing Source: larimer.gov |
| Triggered by | transfer of title Source: larimer.gov |
| Who arranges it | seller Source: larimer.gov |
| How long a report is valid | page conflicts: '12 months from inspection date' vs 'until closing or up to 12 months, whichever first' Source: larimer.gov |
| Exemptions |
Source: larimer.gov |
| If the system fails | Repair permit and repairs before applying, or notarized Agreement to Repair with repairs within 180 days after closing; Agreement to Inspect if weather prevents inspection Source: larimer.gov |
| Who may inspect | NAWT-certified and licensed by Larimer County. official page (larimer.gov) Source: larimer.gov |
| Official forms | larimer.gov Source: larimer.gov |
This is our summary of the official rule as we read it. The ordinance or code and the health department decide: confirm with them before you list, sign or close. Rule set by: Larimer County Department of Health and Environment.
Checked on November 9, 2026: read on the official site.
Private wells in Larimer County
In 2015 about 1,057 of Larimer County’s 333,577 residents (under 1%) got their drinking water from a private well, by the USGS estimate. That is the 62nd highest share of the 64 Colorado counties in the USGS table, and the 51st highest number of private-well users.
As we read it, this rule covers the septic system, not the well.
Source: USGS county water use 2015 (Dieter et al., 2018). Ranks count the Colorado counties in the USGS table (1 = highest).
Certified labs nearest to Larimer County for a well water test
Labs on the Colorado certified drinking-water list that the list marks as taking samples from homeowners or outside clients, certified for coliform bacteria, nearest first. 2 of them are in Larimer County.
| Lab | Town | Distance | Certified on the list for |
|---|---|---|---|
| EAnalytics Laboratory | Loveland, CO · in this county | 4 miles (approx.) | coliform bacteria |
| M.M.S Environmental Laboratories | Fort Collins, CO · in this county | 10 miles (approx.) | coliform bacteria |
| IEH-Warren Analytical Laboratory | Greeley, CO | 34 miles (approx.) | coliform bacteria |
Source: CDPHE Drinking Water Lab Certifications (Looker Studio report on cdphe.colorado.gov/dwlabs) (Live report, no edit date shown; data read by the report at 2026-11-02 20:39 UTC (Looker Studio dataTimestamp); read November 2, 2026). Straight-line distance from the centre of Larimer County (the average of its Census ZIP-area points); “approx.” = lab placed at its ZIP centre. Call the lab first: lists do not say which household tests each lab takes or what it charges.
Nearest other sale-time rules
Buying or selling near a county line? These are the closest other local rules in our census to Larimer County.
| Rule | State | Distance | Covers | Checked |
|---|---|---|---|---|
| Boulder County | Colorado | about 37 miles | Septic system | November 9, 2026 |
| Clear Creek County | Colorado | about 65 miles | Septic system | November 9, 2026 |
| Summit County | Colorado | about 82 miles | Septic system | November 9, 2026 |
| Elbert County | Colorado | about 111 miles | Septic system | November 9, 2026 |
| Teller County | Colorado | about 120 miles | Septic system | November 9, 2026 |
Straight-line distance between county centres (the average of each county’s Census ZIP-area points). Townships, villages and health districts are placed at the centre of their county.