Colorado issues no state septic installer license. There is no state licensing board for this
trade to find, and that is a finding rather than a gap in the search: read as whole documents,
Colorado’s occupational-licensing title never uses the word septic at all, and the word installer
does not occur once in the public health title that governs this work. What Colorado does instead
is write the credential into state law and hand each local board of health the choice of
whether to issue it. C.R.S. 25-10-109 (1) provides that “The local board of health may adopt rules
that provide for the licensing of systems contractors.” So the license a Colorado septic
installer actually holds is a systems contractor license, issued by your local board of health —
and the counter is the board of health with jurisdiction over the site, acting through its local
public health agency, never a state office.
Whether that license binds you depends on which jurisdiction the work is in, and this is the half
of Colorado that gets flattened in both directions. Where a local board of health has used the
power the statute gives it, the prohibition is real and it is in state law:
under C.R.S. 25-10-113 (1)(d) it is a civil infraction where a person “Conducts a business as a
systems contractor without having obtained the license provided for in section 25-10-109 (1) in
areas in which the local board of health has adopted licensing regulations pursuant to that
section”. Where a board has adopted no licensing rules, there is no license to hold and that
infraction has nothing to bite on. So the duty reaches the contractor working in a county whose
board has adopted licensing rules, and does not reach the contractor working where no board has —
and a contractor whose service radius crosses that line has not let a credential lapse; the
compliance question simply changes from one side of it to the other. This page does not say how
many Colorado boards of health have adopted licensing rules, because that count needs a counted,
cited sweep that was not done, and on this evidence it may not be written in either direction:
ask the board of health for the county the job is in.
One distinction does all the work here, and it is the one most easily lost. Colorado compels
every local board of health in the state to develop and adopt detailed rules for on-site
wastewater treatment systems within its area of jurisdiction, at C.R.S. 25-10-104 (2), and
C.R.S. 25-10-105 (1) makes those rules govern location, design, construction, performance,
alteration, installation and use. That mandate is over the SYSTEM. Licensing the PERSON who
builds it sits one section away, at C.R.S. 25-10-109 (1), and is permissive. The same split runs
through the permit a job needs: C.R.S. 25-10-112 (1) bars a city, county or city and county from
issuing a building permit for an unsewered structure “until the local public health agency has
issued a permit for an on-site wastewater treatment system”, and bars the occupancy permit until
that agency has made its final inspection and approved the installation. That permit authorizes
the work on one lot. It is
not the systems contractor license and does not stand in for one, and reading the compelled
rulemaking or the per-lot permit as reaching the licensing of the person is the trap in this
state.
That a local board of health has actually adopted licensing rules is affirmed from one county’s
own regulations, retrieved and read, and the showing stops at that one county. El Paso County Public Health publishes the El Paso County Board of Health’s own on-site
wastewater regulations, and in the version that took effect in July the prohibition is flat: “No
person shall install or repair, or aid in the installation or repair of, an onsite wastewater
treatment system unless they hold a valid systems contractor license issued by EPCPH, with the
exception of the property owner conducting his own installation, modification, or repair in
accordance with section 8.4.F.1.h.” Two things in that same section matter to a contractor who is
growing. The license attaches to the licensed business, not to every pair of hands on the site —
“Employees of a valid licensed system contractor shall not be required to be licensed.” And the
competency behind it travels inside Colorado even though the license does not, because an
applicant may qualify by “Submitting proof of a passing score on the part A exam taken in another
Colorado county within the current approved regulation dates.” That is exam reciprocity, not
license reciprocity. Read all of that as what it is: one local board of health’s own adopted
regulations, cited to that board. It is not Colorado’s rule, and nothing in it describes any
other Colorado county.
The near miss is worth naming, because a contractor who goes looking for a statewide trade
credential will find one and it is the wrong one. Colorado runs no statewide contractor license
or registration that reaches a septic installer as such, and the one statewide construction-trade
credential that could plausibly have covered this work excludes it by name — twice. The
definition of plumbing at C.R.S. 12-155-103 (8)(b)(III) puts outside itself the “Performance,
location, construction, alteration, installation, and use of on-site wastewater treatment systems
pursuant to article 10 of title 25 that are located within a property line.”, and
C.R.S. 12-155-118 (6)(b)(III) repeats the identical exclusion in the same article’s exemptions
section. So a Colorado septic installer does not need a plumbing license for this work — and the
absence of a statewide credential is not an oversight by the legislature. It is a decision the
legislature wrote down in two places.
Neither the designer nor the soil evaluator is reached by this credential, and both judgments
still land on the contractor. Colorado has no designer credential at any level. A professional engineer is required
for named conditions rather than for every system — higher level treatment systems “must be
designed by a professional engineer”, and the same requirement attaches to floodway
installations, type R soils, wastewater ponds and rock plant filters. And the person who reads
the soil is a competency rather than a licensee: the state rule calls that person a competent
technician and provides that “The Division must approve training for visual and tactile
evaluation of soil”, while local public health agencies may approve training for percolation
testing. The state approves the training; nobody issues the technician a credential. So the soil
reading and the installation can come from one firm, even one person, and when a system later
fails on an unrecorded water table the claim is argued as professional judgment rather than
workmanship.
One duty in Colorado does not depend on any counter at all, and it is the pumper’s. Where a local
board of health has licensed systems cleaners under C.R.S. 25-10-109 (2), the work is prohibited
without that license. But the disposal duty binds everywhere regardless: C.R.S. 25-10-112 (5)
provides that “All persons shall dispose of septage removed from systems in the process of
maintenance or cleaning at an approved site and in an approved manner under this article.” It
follows the person rather than the license, so it reaches a hauler working in a jurisdiction that
licenses nobody — and in the mountain counties the approved site can be a long haul from the job,
which moves the largest part of that exposure from the excavation onto the road.
Almost none of this is an insurance requirement. Colorado’s systems contractor license
carries no insurance or bond condition, because C.R.S. 25-10-109 conditions it on the local
board’s own rules, a fee and a term, and that makes the two questions genuinely separate here:
the licensing counter does not ask
what you carry, and what you carry is settled by the contracts you sign and the work you take on
rather than by the board of health.
The sections below set out each question with the authority
it rests on, so you can check it rather than take our word for it.
