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Colorado Statewide Rule

Colorado Stormwater Discharge Permits Under State CDPS Program

Heavy RestrictionsApplies statewide across Colorado (2026)

Key Facts

Statute
CRS 25-8-101 et seq.
Construction trigger
1 acre disturbance
Permit type
CDPS general or individual
Penalty cap
$10,000 per day

Summary

Colorado administers stormwater discharge permits statewide through the Colorado Discharge Permit System, requiring construction sites and industrial activities to obtain coverage before discharging runoff to state waters.

(2) The division shall examine applications for and may issue, suspend, revoke, modify, deny, and otherwise administer permits for the discharge of pollutants into state waters and for the use and disposal of biosolids. Such administration shall be in accordance with the provisions of this article and regulations promulgated by the commission. Until modified pursuant to this article, final permits shall be governed by their existing limitations.

Source: C.R.S. 25-8-101 et seq. - Colorado Water Quality Control ActView official code

Full Breakdown

Under the Colorado Water Quality Control Act, CRS 25-8-101 et seq., the Water Quality Control Division issues general and individual CDPS permits for stormwater associated with construction activities disturbing one or more acres, industrial facilities, and municipal separate storm sewer systems. Permittees must prepare a stormwater management plan, install best management practices, conduct routine inspections, and maintain records. The state permit program is delegated under the federal Clean Water Act and applies uniformly across Colorado regardless of local jurisdiction.

Violations & Penalties

Discharging without a permit or violating permit conditions can result in administrative penalties up to $10,000 per day and civil penalties through enforcement actions by the state.

Frequently Asked Questions

When do I need a stormwater permit in Colorado?
Construction projects disturbing one or more acres, certain industrial activities, and large municipalities require CDPS stormwater permits before any discharge to state waters.
What is a stormwater management plan?
It is a written site-specific plan describing erosion controls, sediment basins, inspections, and maintenance procedures designed to prevent pollutants from leaving the site during rainstorms.
Who enforces stormwater rules in Colorado?
The Colorado Department of Public Health and Environment Water Quality Control Division enforces CDPS permits, with EPA retaining oversight authority under the Clean Water Act.

Sources

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