On June 13, 2025, the Alabama Environmental Management Commission (EMC) voted 6–1 to initiate updates to the state’s outdated water quality criteria for 12 toxic pollutants, marking a significant shift in Alabama’s regulatory landscape for surface water protections. The move follows a formal petition submitted by a coalition of seven environmental organizations and aligns Alabama with current U.S. Environmental Protection Agency scientific guidance.
As a result of the EMC decision, the Alabama Department of Environmental Management (ADEM) will begin formal rulemaking to revise human health water quality criteria for the following pollutants:
- Metals: arsenic
- Volatile Organics: 1,3-dichloropropylene, trichloroethylene, toluene, ethylbenzene, 1,2,4-trichlorobenzene, 1,3‑dichlorobenzene
- Chlorinated Organics: hexachloroethane, pentachlorophenol, 4,6-dinitro-2-methylphenol, 2,4-dinitrotoluene
- Other: Cyanide
These revisions will incorporate updated USEPA toxicity values, including oral reference doses and cancer potency factors, which reflect a significantly higher toxicity profile than previously recognized.
Implications for Regulated Entities
When ADEM revises these criteria, regulated industries will see stricter limits for these parameters in their National Pollutant Discharge Elimination System (NPDES) permits.
Compliance Timeline: ADEM’s rulemaking process is expected to conclude in late 2025 or early 2026, after which the updated criteria will begin to be phased into permits.
Permit Impacts: The revised criteria will lower allowable pollutant concentrations in surface waters. These new standards will apply to NPDES discharge permits, potentially triggering the need for treatment upgrades or process modifications.
Key Takeaways
Alabama is updating its water toxicity standards for the first time in over a decade, signaling a shift toward more modern, science-based water quality criteria. The revised standards are expected to impact NPDES permit holders, including industrial facilities and municipalities, by introducing stricter limits on toxic pollutants. Affected entities should proactively review their discharge profiles, assess potential treatment or compliance gaps, and monitor the regulatory process to prepare for likely changes to permit conditions. Early planning will be key to managing costs and maintaining compliance.
For more information or assistance evaluating how these changes may affect your operations, please contact EHS Support.
