Severn Trent Services' arsenic removal program incorporates a process and filter media that can be a lifeline for those feeling the pressures of regulatory compliance. The result of years of careful development, the SORB 33 system – commercially proven since 1999 - reduces levels to less than 4 ppb. The simple and economical SORB 33® technology uses Bayoxide® E33 granular or Bayoxide® E33P pelletized, ferric oxide media, developed by LANXESS and produced for Severn Trent specifically for groundwater source drinking water adsorption. The Bayoxide® media are long-lasting and once exhausted can be sent to a non-hazardous landfill for disposal.