Fixer and Toners Are Hazardous Waste
Used fixer and toners contain heavy metals (such as silver, gold and selenium) and should be disposed of as hazardous waste.
Don't Dispose of in Septic System
Do not dispose of photographic chemicals in a septic system. A septic system is an underground tank where waste is decomposed by anaerobic bacteria, essentially a smaller private sewer system. Only dispose of these chemicals on a sewer system, which sends wastewater through a treatment plant.