C.R.S. § 25-10-105
25-10-105. Minimum standards - variances
25-10-105. Minimum standards - variances. (1) Rules adopted by local boards of health under section 25-10-104 (2) or (4) or promulgated by the commission under section 25-10-104 (1) govern all aspects of the location, design, construction, performance, alteration, installation, and use of on-site wastewater treatment systems and must include minimum standards established by the commission.
(2) (a) A local board of health may grant variances to OWTS rules in accordance with the criteria adopted by the commission under this article.
(b) Applicants for a variance from OWTS rules have the burden of supplying the local board of health with information demonstrating that conditions exist that warrant the granting of the variance.