Bioreactions within a collection system generate Hydrogen Sulfide (H2S) causing odors that can be strong, persistent, and a nuisance to employees, residents, community leaders, and businesses located near manholes where higher levels of H2S are present.  H2Scents sensors from SmartCover allow for remote monitoring of H2S levels to assist utilities to be proactive with odour complaints, optimize chemical dosing programs, and reduce corrosion of pipes.