Septic permit rules and requirements in Colorado
In Colorado, the state sets the rule. The septic permit comes from your local public health agency. The code is Regulation No. 43. Code of Colorado Regulations, 5 CCR 1002-43 — Water Quality Control Commission, Regulation 43 · checked 2026-09-11
Water Quality Control Division
Writes the rules
checked 2026-09-23
Your local public health agency
Issues the permit
checked 2026-09-11
Regulation No. 43
Code section
checked 2026-09-23
Who decides a septic permit in Colorado
Your local public health agency issues the permit. The state sets the floor through the Water Quality Control Division, Colorado Department of Public Health and Environment.
The rule sets minimum standards for septic systems across Colorado.
Code of Colorado Regulations, 5 CCR 1002-43 — Water Quality Control Commission, Regulation 43 · checked 2026-09-11
The floor state law sets
The rules that govern every septic system in Colorado are Regulation No. 43 — On-Site Wastewater Treatment System Regulation, 5 CCR 1002-43. Every local permit is issued under them.
Code of Colorado Regulations, 5 CCR 1002-43 — Water Quality Control Commission, Regulation 43 · checked 2026-09-23
Colorado counties on this site
We have not published a Colorado county page yet. A county earns a page when we hold facts unique to it. Until then this page is the answer for every county in the state.
Telling us your county is how we decide which one to build next.
Sources
State records only. Each figure above has a government source and a checked-on date. County figures live on the county pages.
Verify before you act. Septic rules are set locally and they change. Check anything here with your local public health agency before you spend money on it.