Despite Improvement, No End In Sight For CO Permit Backlog

Colorado is tackling a significant backlog of water quality permits, which are essential for regulating pollutant discharge into streams. Over the past year, the backlog has decreased, with expired permits dropping from 75% to 50%, according to the Colorado Department of Public Health and Environment (CDPHE). However, 1,384 permits remain expired, highlighting the ongoing challenge.

These permits, required under the federal Clean Water Act, ensure that wastewater treatment plants (WWTPs), factories, and other dischargers meet standards to protect waterways. Expired permits create uncertainty for permit holders, who face potential new requirements and costs while being allowed to continue discharging.

The growing population, climate change, and emerging contaminants like per- and polyfluoroalkyl substances (PFAS) add complexity to managing water pollution. The state has invested millions to address the backlog, hiring more staff and increasing permit fees to sustain regulatory efforts. A CDPHE has also hired a consultant to help improve permitting processes, but recommendations are not expected until mid-2025.