Boulder County, Colorado: septic system inspection at sale
Checked on November 9, 2026 against the official rule. Rule set by Boulder County Public Health.
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 | OWTS inspected to show it functions per design; BCPH issues a Property Transfer Certificate; pumping receipt required with application Source: assets.bouldercounty.gov |
| Triggered by | sale or transfer of title of a property served by an OWTS Source: assets.bouldercounty.gov |
| Deadline | before closing; certificate can take up to 10 business days Source: bouldercounty.gov |
| Who arranges it | The property owner Source: assets.bouldercounty.gov |
| How long a report is valid | until closing or 12 months, whichever first Source: assets.bouldercounty.gov |
| Exemptions |
Source: assets.bouldercounty.gov |
| Fee | $500 per Property Transfer Certificate (non-refundable) (2026 fee schedule) Source: bouldercounty.gov |
| If the system fails | Owner repairs with permit before closing, or buyer signs notarized agreement (conditional certificate): repair within 1 year, connect to sewer within 2 years, or abandon within 30 days Source: assets.bouldercounty.gov |
| Who may inspect | BCPH licensing (NAWT or other applicable certification number on application). official page (bouldercounty.gov) Source: assets.bouldercounty.gov |
| Official forms | bouldercounty.gov Source: bouldercounty.gov |
| In force since | September 24, 2026 Source: assets.bouldercounty.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: Boulder County Public Health.
In force since 2008 (as the official text states).
Checked on November 9, 2026: read on the official site.
Published costs
What the official fee schedule or guide for Boulder County says, with the year it applies to. The other 7 items published in Colorado are listed for comparison; they are different items, so we do not average them.
| Jurisdiction | Item | Amount | Year | Source |
|---|---|---|---|---|
| Boulder County (this rule) | Property Transfer Certificate fee | $500 | 2026 | bouldercounty.gov |
| Archuleta County | transfer acceptance fee | $115 | 2024 | archuletacounty.gov |
| La Plata County | Continued Use Permit fee | $120 | 2026 | cms9files.revize.com |
| Gunnison County | Transfer of Title application fee | $60 | 2026 | gunnisoncounty.org |
| Clear Creek County | Use Permit fee | $100 | 2026 | co.clear-creek.co.us |
| Pueblo County | health-department inspection incl. pumping coordination | $385 | 2026 | pueblocounty.gov |
| Pueblo County | review fee when certified inspector's report submitted | $140 | 2026 | pueblocounty.gov |
Inspectors, pumpers and labs set their own prices on top of these; the official source is the one that counts.
Compared with other Colorado rules
- In force since 2008: the oldest of the 5 Colorado local rules whose start year we could read. Oldest: Boulder County (2008), Archuleta County (2019), Gunnison County (2019).
Our census of official rules, checked November 9, 2026; start dates as the official text states them.
Private wells in Boulder County
In 2015 about 3,672 of Boulder County’s 319,372 residents (1%) got their drinking water from a private well, by the USGS estimate. That is the 59th highest share of the 64 Colorado counties in the USGS table, and the 23rd 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 Boulder 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. All of them are outside Boulder County.
| Lab | Town | Distance | Certified on the list for |
|---|---|---|---|
| Gilpin County Public Health Agency | Black Hawk, CO | 18 miles (approx.) | coliform bacteria |
| Eurofins Reservoirs Environmental, Inc. | Arvada, CO | 21 miles (approx.) | coliform bacteria |
| Murray-Brown Laboratories, LLC. | Northglenn, CO | 22 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 Boulder 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 Boulder County.
| Rule | State | Distance | Covers | Checked |
|---|---|---|---|---|
| Clear Creek County | Colorado | about 31 miles | Septic system | November 9, 2026 |
| Larimer County | Colorado | about 37 miles | Septic system | November 9, 2026 |
| Summit County | Colorado | about 53 miles | Septic system | November 9, 2026 |
| Teller County | Colorado | about 83 miles | Septic system | November 9, 2026 |
| Elbert County | Colorado | about 83 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.